Senior Python FastAPI Software Engineer

Senior Python Software Engineer

Berlin (hybrid)

3 month initial contract w/ scope to extend

€600-750 per day

Profile Requirements

Must-have experience

• 8+ Year of Experience in professional Software Development using High-Level programming languages.
• Advanced Python (3.9+) proficiency. Strong command of asynchronous programming (asyncio, aiohttp, etc.), multiprocessing, and concurrency models.
• Extensive experience with Python frameworks for building scalable APIs and services, specifically FastAPI.
• Expertise in modular software design, with an emphasis on separation of concerns and maintainable codebases.
• Strong grasp of type hinting, dependency injection, and automated testing frameworks (pytest, unittest, or equivalent).
• Experience working with multiple database paradigms: Relational (PostgreSQL), NoSQL (Redis, MongoDB, ArangoDB/Neo4J). Experience with database libraries like SQLAlchemy.
• Deep understanding of microservice design principles, including service boundaries, state management, inter-service communication (REST, gRPC,) and API design.
• Thorough understanding of application and API security principles and related frameworks and technologies OAuth2 OIDC.

Must-have language skills

• Fluent English in speech and writing (at least C1).

Preferred experience

• Proficient in database integration for microservices — able to design schema and data models per service and manage data consistency and performance.
• Hands-on experience with containerizing services

Responsibilities

Objective: Programming

• Writing production grade source code to implement architecture design specifications.
• Writing unit tests and providing code documentation.
• Actively participating in activities such as agile ceremonies.

Objective: Technical Leadership

• Making technical decisions within the boundaries set by architecture design.
• Communication of decisions to peers, architecture and relevant stakeholders.
• Generate and communicate status reports to stakeholders, e.g. architects and delivery.
• Facilitation of meetings and presentation of technical concepts in simple terms to medium sized audiences.

Objective: General Leadership

• Providing guidance to other development stakeholders
• Ensuring on-time delivery of application features and/or entire software components.

Objective: Continuous improvement

• Identifying opportunities for improvements towards the development process.
• Promoting and fostering agile ways of working.