Senior Python Developer (subcontractor)

AIDA projektai, MB; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

AIDA projektai, MB in Warsaw, Poland is seeking a Senior Python Developer (subcontractor) to lead system architecture and develop core components. You will design scalable APIs, guide technical direction, and ensure high quality across the project.

You will collaborate with DevOps and QA, work in Linux and Docker environments, and apply best practices in microservices, API design, and data modeling with PostgreSQL. Strong English skills required.

Qualifications

• 5+ years backend development in Python.
• Experience as a Solution Architect or Tech Lead.
• Strong knowledge of microservices and API design.
• Proficient in PostgreSQL and async patterns.

Responsibilities

• Own system architecture decisions and framework selection.
• Develop core components, POCs, and modules.
• Document architecture decisions and patterns.
• Lead technical discussions with team and stakeholders.
• Ensure code quality and maintainability through reviews.
• Collaborate with DevOps and QA for deployment and stability.
• Implement logging, metrics, and dashboards for observability.
• Work in Linux environments with Docker and Git workflows.
• Analyze latency and profiling data to improve performance.

Skills

Python

Microservices

API design

PostgreSQL

Async programming

Celery

RabbitMQ

FastAPI

Django

Flask

Linux

Docker

Git

English (B2)

Tools

Docker

Git

Job description

About the job Senior Python Developer (subcontractor)

Responsibilities

• Own the system architecture: from choosing frameworks and database structures to designing scalable APIs and services
• Take a hands-on role in development: build core components, POCs, and critical modules
• Define and document architectural decisions, patterns, and best practices
• Lead technical discussions and decisions within the team and with stakeholders
• Help the team stay unblocked, productive, and aligned with technical direction
• Review code, guide implementation, and ensure high technical quality across the project
• Collaborate with DevOps and QA to ensure stability, observability, and smooth deployments
• Deep knowledge of core Python and experience in collecting data through accessing hardware
• Low-level event capture (ETW/PresentMon/DXGI) for analyzing latency and present times. Profiler orchestration (OCAT, PresentMon, NVAPI/ADL hooks, Intel GPA/RenderDoc as needed). Reliable logging, result storage, test comparisons, and report generation. Web dashboard with charts and test history.

Requirements

• 5+ years of experience in backend development with Python
• Proven experience as a Solution Architect, Tech Lead, or Senior Backend Engineer
• Deep knowledge of Python frameworks (FastAPI, Django, Flask)
• Strong understanding of:
  • microservices architecture
  • API design and service boundaries
  • data modeling and relational databases (PostgreSQL)
  • async programming and queues (e.g., Celery, RabbitMQ)
• Experience designing systems for scalability, fault tolerance, and maintainability
• Comfort working with Linux environments, containers (Docker), Git workflows
• Excellent communication skills and ability to justify architectural decisions
• Very good English language skills, both written and verbal (min. B2)
  

Preferred Skills

• Experience with Azure DevOps, GitHub Actions, or other CI/CD platforms
• Familiarity with cloud platforms (Azure, AWS, GCP)
• Experience with system monitoring, logging, and performance profiling
• Bonus: exposure to AI/ML integration, vector databases (e.g., Qdrant, Pinecone)