Difference Between Contractors And Developers Jobs in Usa

Everyone on our team has earned a CPC (Certified Personnel Consultant) or CTS (Certified Temporary Staffing Specialist) accreditation from the National Association of Personnel Services. We are experts at staffing and recruiting with more than 16 years of experience serving employers.

Our approach to staffing isn't just a little bit different; it's a whole different ball game. While most staffing firms emphasize transactional services (taking and filling job orders), BTI Solutions focuses on providing more strategic solutions.

By acting as workforce consultants, we are able to find innovative and intelligent strategies for improving productivity, meeting project deadlines, improving hiring quality, decreasing turnover, and reducing total labor costs.

Our recruiting and candidate assessment process assures the highest quality matches between job seeker and employer, so you will get people who not only have the right qualifications but who also have the appropriate personality fit for your organization.

More than anything, the biggest difference with BTI Solutions is the one that matters most: bottom-line results.

• 95% client satisfaction rate measures client satisfaction vs. expectations.
• Clients have worked with us for over 10 years, on average.
• BTI Solutions counts 4 Global Telecommunication companies as clients.
• Client referrals are BTI Solutions' largest source of new clients.
• Google Review 4.4, Facebook Review 4.8

Responsibilities:

• Design, develop, and maintain robust, scalable applications and modules, writing clean, efficient, and well-documented code
• Manage the entire software development lifecycle, including planning, prioritizing, testing, and releases, often using Agile methodologies
• Lead, guide, and mentor junior developers, conducting code reviews and ensuring adherence to best practices
• Work closely with project managers, business analysts, designers, and other engineers to define requirements and deliver innovative solutions
• Implement automated testing, debug issues, troubleshoot complex problems, and ensure application security and performance
• Contribute to high-level application design and database architecture
• Participate in internal and external meetings to gather the business requirements and suggest solutions
• Analyze the business requirements and suggest the best practice to apply to the business requirements
• Write clean code to produce fully functional backend processes and frontend UI modules
• Develop a new or existing system of frontend UI and APIs
• Write unit, integration, and production test scenarios
• Troubleshoot and debug to optimize application performance
• Liaise with the development team to identify and plan new features
• Ensure the developed modules comply with Samsung SDS quality assurance standards
• Research and suggest new technologies, applications, and protocols
• Be an individual contributor when it comes to designing and developing frameworks and critical pieces of code that have a wider impact
• Create detailed technical plans for the execution and implementation of projects
• Be available to answer technical questions, clarifications, and clear obstacles for the team
• Being transparent with the team about challenges, failures, and successes
• Writing development progress reports

Requirements:

• 10+ years of application development experience
• Bachelor's degree in computer science, engineering, or a related field
• Extensive knowledge of Java development. This includes the whole process, from the first line of code to implementation in the production environment
• Deep knowledge of operating systems, including but not limited to
• Proficiency with writing automated tests in JUnit, Espresso, Mocha, Jest, Enzyme, XCTest, etc.
• Proficiency in Java, with a good understanding of its ecosystems
• Sound knowledge of Object-Oriented Programming (OOP) Patterns and Concepts
• Familiarity with different design and architectural patterns
• Skill for writing reusable Java libraries
• Know-how of Java concurrency patterns
• Good understanding of the concepts of MVC (Model-View-Controller) Pattern, JDBC (Java Database Connectivity), and RESTful web services
• Experience in working with popular web application frameworks like Play and Spark
• Relevant Knowledge of Java GUI frameworks like Swing, SWT, and AWT according to project requirements
• Extensive knowledge of the class loading mechanism in Java
• Experience in handling external and embedded databases such as Oracle, MS SQL, etc.
• Understanding basic design principles behind a scalable application
• Skilled at creating database schemas that characterize and support business processes
• Basic knowledge of JVM (Java Virtual Machine), its drawbacks, weaknesses, and workarounds
• Implementing automated testing platforms and unit tests
• In-depth knowledge of code versioning tools, for instance, Git
• Expertise in continuous integration
• Experience in Java Server Pages (JSP) and servlets, Web frameworks like Struts and Spring
• Web Technologies like HTML, JavaScript, CSS, JQuery
• Abstract classes and interfaces
• Constructors, lists, maps, sets
• File IO and serialization, Exceptions, and Generics
• Java Keywords like static, volatile, synchronized, transient, etc
• Multithreading and Synchronization
• Experience with profiling and debugging Java-based applications and products
• Experience integrating with backend systems preferred, such as ERPs, WMS, OMS, etc.
• Solid knowledge of performance Improvement best practices
• Experience in a similar role would be advantageous
• Willingness to build professional relationships with staff and clients
• Excellent communication, motivational, and interpersonal skills

Developer Advocate (DevRel) / Contract, extendable 3-months / Palo Alto, CA

Summary:

As the Developer Advocate for our Agents, you are the bridge between our products and the global engineering community. Your mission is to champion a new era of Agentic DevOps, helping developers move beyond manual pipelines to autonomous, AI-driven software delivery.

You will be the primary voice for our suite of Agents, ensuring that developers can seamlessly integrate AI into their existing SDLC.4

Responsibilities:

• Content Creation: Produce high-signal technical content—tutorials, deep-dive blogs, and \"Agent Recipes\"—that demonstrate how to use Client's Agents to automate security audits, performance benchmarking, and multi-cloud deployments.
• Community Engagement: Actively support the \"Agentic\" community on GitHub, Discord, and Stack Overflow. You will represent Client at industry events, leading workshops on how AI agents reduce developer toil.
• Product Feedback (\"Customer Zero\"): You will be the first to test new agent capabilities. You'll document friction points in the Agentic SDLC (AISDLC) and advocate for community-requested features in roadmap meetings with our CTO and engineering teams.
• Developer Education: Build and maintain \"Get Started\" templates that reduce time-to-value

Required Skills:

• Technical Background: 3+ years of experience in software engineering (Python, Go, or JavaScript). Familiarity with LLM orchestration frameworks and CI/CD tools is a major plus.
• Communication: Proven ability to explain complex \"Agentic\" concepts—such as prompt engineering for DevOps or automated remediation—to both platform engineers and developers.
• Portfolio: A public presence, such as a technical blog, active GitHub repository featuring automation projects, or a history of speaking at AI meetups.

Jr. ServiceNow Developer w/ Active Top Secret or DHS Clearance

Location: Hybrid in Ashburn, VA (must be onsite 2-3 days per week)

InDev is seeking a Jr. ServiceNow Developer to design, build, and enhance ServiceNow applications and integrations that support homeland security mission outcomes. You’ll work hands-on across ITSM and adjacent modules, develop high-quality scripts and flows, integrate with enterprise systems, and collaborate within an Agile team to deliver secure solutions aligned with DHS standards and FedRAMP requirements. This role will provide hands-on development for the government ServiceNow platform. This role also will ensure ServiceNow supports enterprise service delivery, governance, and modernization objectives, while aligning with the Technology Reference Model (TRM) and DHS enterprise IT standards. This position requires an active Top Secret clearance and/or active DHS clearance. Salary will be based on number of years of experience.

YOUR FUTURE DUTIES AND RESPONSIBILITIES

Development & Configuration

• Develop and configure ServiceNow modules (ITSM, ITOM, HR, GRC, etc.) to meet mission requirements.
• Build workflows, dashboards, catalog items, and integrations with enterprise systems.
• Implement automation and performance improvements across ServiceNow capabilities.
• Write clean, maintainable JavaScript using the Glide API (Business Rules, Script Includes, Client Scripts, Scheduled Jobs).

Integrations & Automation

• Implement integrations using REST/SOAP, MID Server, IntegrationHub, and scripted transforms.
• Automate workflows with Flow Designer and platform APIs; optimize performance and data quality.

Quality & Delivery

• Participate in grooming and refinement; estimate and deliver within Scrum sprints.
• Use ATF and unit tests; perform code reviews; manage update sets and basic CI/CD (e.g., Git branching, peer review, promotion workflows).
• Troubleshoot incidents/problems, perform defect resolution, and execute performance tuning.

Security, Compliance & Standards

• Follow platform secure coding practices; support FedRAMP, FISMA, and Section 508 considerations.
• Adhere to platform standards, naming conventions, and release governance; contribute to technical documentation and SOPs.

Stakeholder Collaboration

• Translate user stories into technical solutions; demo features in sprint reviews.
• Partner with BA/PM/architects to ensure traceability from requirements to delivered functionality.
• Collaborate with stakeholders, business analysts, and architects to translate requirements into ServiceNow solutions to include feature definition and creation and management of Jira epics and user stories.

QUALIFICATIONS

• Must hold an active Top Secret clearance and/or active DHS clearance.
• A Bachelor’s degree in Computer Science, Information Systems, Engineering, Business or other related discipline or a minimum of three (3) years relevant specialized experience.
• 3+ years of ServiceNow development experience
• CAD (Certified Application Developer - ServiceNow) certification required.
• Hands-on experience with JavaScript.
• Proven ability to design, configure, and implement complex ServiceNow modules, workflows, and business rules.
• Proven experience delivering projects using Agile methodologies.
• Hands-on experience with out-of-the-box ServiceNow features, such as workflows, scoped applications, and business roles.
• Proficient in cloud-based enterprise application platforms for IT services, operations, and business management.
• Strong communication skills to interact with technical teams and government stakeholders.

NICE TO HAVES

• Experience with DHS or CBP programs.
• Knowledge of enterprise governance, TRM processes, and AI/automation initiatives.
• Familiarity with Section 508, FISMA, and FedRAMP requirements.

Clearance: Must hold an active Top Secret clearance or DHS clearance.

WHY INDEV

• Innovative Environment: Join a team that thrives on creativity and innovation, where your ideas are not only heard but encouraged.
• Meaningful Impact: Contribute to projects that directly impact federal agencies, driving positive change on a national scale.
• Dynamic Collaboration: Work alongside diverse experts who are passionate about pushing boundaries and making a difference.
• Agile Mindset: Embrace Agile methodologies that encourage flexibility, adaptability, and rapid growth.
• Learning Culture: Enjoy ongoing learning opportunities and professional development to expand your skill set.
• Cutting-edge Tech: Engage with the latest technologies and tools in the data integration landscape.

If you’re ready to embark on a journey of innovation, collaboration, and impact, InDev welcomes you to join our team. Let’s shape the future together.

About the ANA

The ANA’s (Association of National Advertisers) mission is to drive growth for marketing professionals, brands and businesses, the industry and humanity. Founded in 1910, the ANA provides leadership that advances marketing excellence and shapes the future of the industry. Our membership includes more than 20,000 brands and 50,000 industry professionals that collectively invest $400 billion in marketing and advertising annually. It consists of U.S. and international companies, including client-side marketers, nonprofits, universities, and marketing solutions providers, which include ad agencies, marketing data science and technology suppliers, law firms, consultants, and vendors. We are obsessed with delighting our members through superior products and services and an unwavering commitment to helping them become more effective marketers, build stronger brands, develop a more productive industry, and benefit humanity through bold leadership and innovation programs.

The ANA provides many benefits to its members, including best-in-class training led by the Marketing Training & Development Center(MTDC). As an eLearning Instructional Designer and Developer you will be a key contributor to this training by helping to advance and innovate the on-demand training program which currently includes close to 100 courses, certificate programs, and a certification program. This role is a full-time hybrid (position based in the New York, N.Y. headquarters).

Location

New York City (4 days in-office, Fridays remote)

About the Position

Join the skilled ANA MTDC team delivering top-tier self-paced learning to leading organizations worldwide. We are seeking an experienced eLearning Instructional Designer and Developer (IDD) to both design and develop interactive eLearning course experience. Development will be your primary responsibility, and instructional design will be your secondary responsibility. As an instructional designer, you will help identify content needs, build a pipeline of design and development projects, work with subject matter experts to develop/update/redesign instructional materials based on proven instructional design methods, and collaborate with course developers. As a course developer, you will be very skilled in technical course development and convert instructional materials into interactive/engaging courses using various course authoring software, platforms for AI-generated content and videos, visual/graphic design tools, and audio/video software.

What You Will Be Doing

Instructional Designer (approximately 30% of your time, subject to change based on business needs):

• Creating, managing, and maintaining the scope of the course design and development projects
• Identifying marketing industry learning needs and on-demand channel gaps for course development projects
• Identifying and working with subject matter experts on the on-demand course projects and keeping the course development pipeline filled on an on-going basis
• Refining supportive course design processes and templates for subject matter experts
• Following established eLearning design and development standards/guidelines, while continually enhancing them with innovative approaches
• Designing instructional materials with subject matter experts that will deliver engaging and interactive eLearning courses with multiple lessons, case studies, activities, knowledge checks, downloadable tools, and assessments
• Designing new microlearning courses and AI-generated course learning experiences
• Creating eLearning activities that provide practical learning application and enhance retention
• Developing storyboards, video scripts, and audio scripts for course development
• Applying knowledge of copyright and intellectual property guidelines for eLearning
• Collaborating with course developers on the vision for eLearning courses and providing guidance for compelling learning experiences and outcomes

Course Developer (approximately 70% of your time, subject to change based on business needs):

• Building, redesigning, and/or updating SCORM compliant courses using course authoring tools, primarily Storyline 360, RISE, and other platforms (e.g., HeyGen) that use AI to generate content and course videos
• Refining and building new supportive course development project processes and course templates
• Creating multimedia, visual/graphic design, and interactive course solutions
• Supporting audio production, producing videos, and editing audio/video for course development
• Collaborating with instructional designer on the vision for eLearning courses and providing compelling learning experiences and outcomes
• Performing quality assurance (QA) and testing of courses prior to their release
• Collaborating with LMS administrator on testing, publishing, and launching of courses on the LMS and ANA website

Both Roles:

• Building cross-functional partnerships and working with all project stakeholders internally and externally
• Continually evaluating user feedback and working to ensure all instructional materials are consistent and up-to-date and redesigning/updating course content when needed
• Maintaining well organized project documentation and folders with all content and course assets
• Providing customer support help as needed for member, registration, course, and LMS inquiries
• Other eLearning instructional design and development responsibilities as deemed necessary for the business

What We Need to See From You

• Bachelor's degree along with a minimum of 3-5 years of experience designing eLearning instructional design materials with subject matter experts (approximately ten or more projects annually) and
• developing eLearning courses (including microlearning) in Storyline 360, RISE, and platforms that provide AI-generated content and course videos (e.g., Synthesia) (approximately ten or more course projects annually)
• Exceptional knowledge and working experience in the application of adult learning theories and instructional design approaches in eLearning courses
• Excellent communication (written, verbal, interpersonal) and collaboration skills – with the ability to provide thoughtful and logical feedback to subject matter experts
• Ability to write effective copy and instructional text with proven grammar and editing capabilities
• Above average proficiency in Microsoft Office applications, especially in PowerPoint – you should be a super user!
• Strong multimedia skills specifically visual/graphic design skills and audio/video development and editing capabilities – to enhance the learning experience – a must have!
• Strong attention to detail
• Excellent project management and time-management skills
• Ability to work independently and collaboratively in a results-oriented environment

How You Can Stand Out

• Tell us why you love your work and why you want to work with the ANA MTDC team
• Show us your portfolio that exhibits your innovation and expertise in instructional design as well as course (including microlearning) development in Storyline 360 and RISE
• Master’s degree in instructional design, educational technology, or related field
• Corporate eLearning instructional design and development experience
• Possess a background and /or interest in marketing or related field

Salary and Total Rewards Package

Starting pay range: $90,000 to $100,000 based on relevant experience and qualifications.

Comprehensive health and wellness benefits, 401k with company match, flexible scheduling, generous paid time off program, casual dress code, incentives, and rewards. 

To Apply:

If your skills, experience, and enthusiasm align with this position's requirements and responsibilities, please forward a cover letter with salary requirements and a resume to . Note, only applicants who include salary requirements will be considered. 

Since 1986, our mission has been simple. We design and build heirloom quality products while holding true to our commitment to use earth-friendly materials and to give back whenever possible.

The Assistant Product Developer reports to a Product Developer and is tasked with assisting in all components of the product development process for assigned categories. The Assistant Product Developer will be working cross functionally with senior management, store operations, marketing, planning, sourcing, and merchandising to introduce new products into the Arhaus assortment. This individual will also be responsible for delivering on-trend, brand-right product that delivers against our business and product strategy.

Essential Duties & Responsibilities:

• Work with vendors to gather and compile product info across the assigned category and input this information into Marketing Docs, Product Information System and Assortment plans.
• Sample Purchase Order management followed by management of Sample Trackers for the assigned category monitoring each sample from a vendor to Arhaus warehouse, informing Product Development team of any changes in the tracker.
• Work closely with the web team to ensure that product is launched in a timely manner and is accurately represented on the Arhaus website.
• Assist in specifying product packaging and, in conjunction with the Quality Control team, ensuring compliance of product quality and packaging when the initial sample arrives in the warehouse.
• Work closely with Sourcing and QC teams to resolve any quality concerns with new and existing products.
• Assist in proofing product information for catalog and web copy
• Manage to compile information for assortment plans seasonally from start to finish
• Manage the transfer of new product samples to sample room, photo studio, and catalog photoshoots
• Assist in monitoring market trends along with PD management and provide well-informed feedback and ideas for new product ideas
• Manage all material references shipped to vendors, and maintain finish/material libraries.
• Work closely with Associate Product Developer, Product Developer and CMO for direction on a new product that addresses market and internal assortment needs.
• Assist in the building and maintenance of vendor relationships to accomplish goals

Success Factors

• Hold oneself accountable for meeting commitments and achieving objectives
• Elevate challenges to seek partnership with leader to resolve
• Support the team by creating an efficient and productive work flow between ideation and administration
• Seek and engage to learn about customer preferences and trends

Requirements:

• Four-year college degree in design, merchandising, or related field
• 1+ years experience in a Design/Product Development /Merchandising experience in retail setting
• Experience with Microsoft Office (Excel, Word, Outlook) and the ability to learn and retain new computer systems in a timely manner

Arhaus is an Equal Opportunity Employer and prohibits discrimination and harassment of any kind. Arhaus is committed to the principle of equal employment opportunity for all employees and to providing employees with a work environment free of discrimination and harassment. All employment decisions at Arhaus are based on business needs, job requirements, and individual qualifications, without regard to race, color, sex, sexual orientation, gender identity, religion or belief, family or parental status, or any other status protected by the laws or regulations in the locations where we operate. Arhaus will not tolerate discrimination or harassment based on any of these characteristics. Arhaus encourages applicants of all ages.

Hello,

I hope you are dong well, Tech-Consulting is looking for Dynamic Entry Level Mobile Developer in Atlanta, GA. We are scouting talent in though US. Gel Along!

Job Title: Junior Mobile Developer

Experience: 0–2 years

Location: Atlanta, GA

Employment Type: Full-time

Job Overview

We are looking for a motivated Junior Mobile Developer to join our development team. You will assist in building, testing, and maintaining mobile applications for Android and/or iOS platforms. This role is ideal for someone who is passionate about mobile technologies and eager to learn from experienced developers.

Key Responsibilities

Assist in developing and maintaining mobile applications.

Write clean, efficient, and maintainable code.

Collaborate with UI/UX designers, backend developers, and product teams.

Debug and fix issues in existing applications.

Participate in code reviews and team meetings.

Test applications to ensure performance, quality, and responsiveness.

Stay updated with the latest mobile development trends and tools.

Required Skills

Basic knowledge of mobile development frameworks such as:

Flutter

React Native

Android Studio

Xcode

Programming knowledge in:

Dart

Java

Kotlin

Swift

JavaScript

Understanding of REST APIs and JSON.

Basic knowledge of Git version control (e.g., GitHub).

Familiarity with mobile UI/UX principles.

Good problem-solving and communication skills.

Qualifications

Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent experience).

Internship or project experience in mobile app development is a plus.

• Seniority Level
• Entry level
• Industry
• IT Services and IT Consulting
• Employment Type
• Full-time
• Job Functions
• Consulting
• Skills
• Mobile Technology
• Computer Science
• iOS
• Android Development
• Programming
• Java
• Mobile Applications
• JavaScript
• React Native
• Mobile Application Development
• Android
• Problem Solving

Job Role: Lead Software Engineer - AI Application Platform

Location: Charlotte, NC (Onsite)

Eligibility: USC/GC/H4-EAD only

Pay Rate: $90/hr. on W2

The Opportunity

We are seeking a Lead Software Engineer to guide the architectural development and execution of AppGen, a sophisticated AI-powered application generation platform. This role suits a proven technical leader with deep, hands-on expertise across the full software stack who finds enabling a team to build better software deeply satisfying.

You will shape critical systems, mentor senior and junior developers through complex technical decisions, conduct rigorous code reviews across multiple technology domains, and directly influence the platform's trajectory through strategic engineering leadership.

This is for someone who:

• Engages thoughtfully when a junior developer asks targeted architectural questions—because you see an opportunity to shape how someone thinks about systems

• Takes time to explain subtle type-safety issues in code review, understanding that feedback is a teaching moment

• Can present architecture clearly to executives and confidently explain both what we're building and why it matters

• Finds more energy in the code your team ships than in the code you write individually

• Has proven depth across the full stack and a track record of developing engineers into stronger contributors

If that describes you, we'd like to talk.

Core Responsibilities

1. Technical Architecture & Systems Thinking (40%)

• Shape architectural decisions across the full stack: How should the component layer handle dynamically generated forms? What's the right approach to validate complex cross-field dependencies in the FormBuilder? What separation of concerns makes sense between the Generator Lambda and the Parent Backend?

• Guide architecture discussions: Help senior developers think through design trade-offs. Should we use NgRx or Angular signals for this feature? When does a new Lambda function become worthwhile given cold-start costs?

• Identify and address system-wide bottlenecks: Work across layers to improve performance. Explore Lambda cold-start optimization, RDS query efficiency, and DynamoDB access patterns.

• Establish patterns and guide consistency: Define coding conventions that work across Python, TypeScript, and Terraform. Help new team members understand the reasoning behind architectural choices.

What this looks like in practice: You're able to justify architectural decisions with technical reasoning. When someone questions an approach, you can explain the trade-offs you considered. You can write code in multiple languages to validate an approach if needed.

2. Code Review & Technical Guidance (30%)

• Full-stack PR reviews: Review Python FastAPI endpoints and Angular components with equal depth, understanding how they interact.

• Deep technical review: Catch issues thoughtful code review can surface:

o RxJS Observable lifecycle and potential memory patterns in Angular

o Query efficiency and data loading patterns in SQLAlchemy

o Terraform module organization and state management implications

o Type safety and TypeScript coverage gaps

o AWS security and IAM configurations

• Educational feedback: Your code reviews help the team learn. When you identify an issue, reviewees understand not just what changed, but how to think about similar problems in the future.

• Define quality expectations: Work with the team to establish what \"production-ready\" means for this platform and support consistent application of those standards.

What this requires: Experience reviewing code across teams and multiple languages. You know how to write feedback that resonates—clear, constructive, and focused on helping people improve.

3. Mentorship & Team Development (20%)

• Expand specialist capabilities: Help backend specialists learn to contribute to the forms-engine. Support frontend experts in understanding FastAPI patterns.

• Accelerate junior developers: Pair on complex problems. Explain the reasoning behind patterns like DataState. Connect architectural choices to implementation details and performance implications.

• Identify and address gaps: Recognize when someone is struggling with a technology and provide targeted support—training, pair programming, or guidance through architectural decisions.

• Create growth opportunities: Stretch the team into new areas. A backend engineer working on their first Terraform contribution. A frontend specialist implementing an AWS Lambda authorizer.

What this requires: Genuine investment in people's growth. You've walked developers through major transitions (generalist to specialist, specialist to full-stack, or into new technology areas). You understand that team strength grows when individuals expand their capabilities.

4. Stakeholder Communication & Technical Leadership (10%)

• Explain to diverse audiences: Translate architectural choices and trade-offs for product managers, executives, and business stakeholders. Connect \"optimizing DynamoDB queries\" to \"improving form submission latency by 30%.\"

• Shape technical direction: Contribute the engineering perspective on feasibility, risk, and what unlocks future capabilities.

• Support release confidence: You understand the code changes, comprehend the risks, and know what to monitor. You can stand behind releases.

Required Qualifications

Technical Skills

Frontend (Production Experience)

• 5+ years of Angular (including handling version migrations, optimizing change detection, and guiding teams through reactive patterns)

• Strong TypeScript skills with generics, discriminated unions, and strict mode

• RxJS depth: You understand hot vs. cold observables, unsubscription patterns, and can identify potential memory issues in reviews

• NgRx state management: You've designed stores at scale, optimized selectors, and evaluated architectural implications

• CSS Grid & Responsive Design: You can assess component hierarchy and layout decisions

• Material Design: You've worked within it and know when and how to extend it

Backend (Production Experience)

• 5+ years of Python (async/await, type hints, data modeling)

• FastAPI production experience: session management, dependency injection, middleware

• SQL and ORMs (SQLAlchemy): You write efficient queries and review them critically

• AWS services: Understanding of Lambda behavior, IAM least-privilege patterns, VPC networking

• REST API design: Versioning, error handling, idempotency

• Testing frameworks: pytest, testing st