Middle Python Developer (FastAPI / AWS)

Come Back Agency helps US software and technology companies run their hiring process. We work with delivery and leadership teams to define roles, screen candidates, and manage interviews. Successful candidates are hired directly by the company and become part of its team.

This position is with a US-based software company providing custom development and AI implementation for North American clients. The team builds and maintains production software, including AI-enabled systems, and works in long-term client engagements. Team members operate as part of an internal, distributed team and collaborate directly with client stakeholders.

About the Role

We are looking for a Middle Python Backend Developer with 3+ years of commercial experience to join our backend engineering team. In this role, you will be responsible for developing robust backend services, integrating third-party APIs, managing AWS infrastructure, and participating in direct client communications. The ideal candidate can showcase 1–2 production projects, clearly articulate their personal contributions and solutions to technical challenges, confidently debug production incidents, and comfortably leverage modern AI tools like Claude Code in their daily workflow.

What You Will Do
Backend Development: Develop, maintain, and scale high-performance backend services, build REST APIs, and integrate third-party services and AWS components.
Optimization & Security: Ensure optimal application performance, code quality, system stability, and data security.
Production Support: Debug and resolve production issues, analyze logs, and perform root-cause analysis during incidents.
Client Interaction: Participate in client calls for requirements clarification, technical demos, task estimation, and explaining technical decisions.

Requirements
Experience: 3+ years of commercial Python backend development experience.
Production Track Record: 1–2 projects brought to production and supported post-release, with the ability to explain your specific role, obstacles faced, and technical solutions implemented.
Core Python: Deep knowledge of Python 3 and async/await programming paradigms.
Frameworks: Strong hands-on experience with FastAPI (or solid commercial background in Django/Flask with a strong readiness to transition to FastAPI).
API Design: Clean REST API design, authentication, and authorization mechanisms.
Databases: Solid experience with relational databases like PostgreSQL or MySQL (schema design, indexing, migrations, and basic query optimization), along with exposure to NoSQL databases.
Cloud & DevOps Basics: Practical experience with AWS core services (S3, EC2, or Lambda), Docker, and Git.
Testing: Writing unit and integration tests using pytest.
Queues & Caching: Hands-on experience with Redis and queue systems (Celery, SQS).
Incident Resolution: Hands-on experience debugging in production environments using logs, monitoring tools, and root cause analysis.
AI Tools: Hands-on experience using Claude Code to accelerate development.
Communication: Upper-Intermediate English level (B2+) or higher for seamless direct written and verbal communication with international clients.

Nice to Have
Hands-on experience with DynamoDB.
Experience with EventBridge and serverless architecture.
Experience with LLM integrations (OpenAI API, LangChain / LangGraph).
Commercial experience with Django.
Experience setting up CI/CD pipelines.

What We Offer
Working hours aligned with US time zones, typically 16:00–23:59 Kyiv time.
Company-sponsored English lessons to support clear and confident communication.
Paid vacation and sick days.
Fully remote work.
Opportunities for professional growth within the team.
Structured, personalized onboarding to help you ramp up effectively.

Hiring stages: Recruiter screening → Technical Interview.

Apply with your resume and a short note outlining your relevant experience. You can also submit it through our website at comeback.ua. Selected candidates will be contacted by Come Back Agency.