Senior Backend Engineer (Python & FastAPI)

Salary

up to 150 PLN/h

+VAT (B2B) per hour

Location

Poland

Experience

Senior
Apply now

Active job offers

Senior Backend Engineer (Python & FastAPI)

  • FastAPI
  • NoSQL
  • pytest
  • Python
  • SQL

Requirements

  • Python
  • FastAPI
  • PostgreSQL
  • NoSQL databases
  • Kafka
  • pytest
  • AWS
  • Docker

Join our team supporting a fast-moving health-tech startup that’s redefining how patients connect with doctors across the United States. Think secure, seamless video consultations, delivered through a robust scheduling platform and intuitive mobile apps on Android and iOS.

We’re looking for a Senior Backend Engineer who’s passionate about writing clean, scalable code and thrives in a startup-like environment. If you’re experienced with Python and FastAPI, know your way around cloud-native systems, and enjoy working closely with product teams to shape real-world solutions, we’d love to hear from you.

Requirements
  • 5+ years of Python backend experience, including 2+ years with FastAPI or similar frameworks.
  • Proven track record building RESTful APIs for web/mobile apps, with payment integration (e.g., Stripe).
  • Deep knowledge of PostgreSQL, SQLAlchemy, and Alembic.
  • Experience with NoSQL (DynamoDB, MongoDB) and search tech like OpenSearch/Elasticsearch.
  • Proficiency in async programming and messaging systems (Celery, Kafka, etc.).
  • Proficiency with performance optimization strategies at the API Level (caching, pagination, async tasks).
  • Strong background in testing and automation using pytest and mocking frameworks for unit/integration testing.
  • Proficiency in GitHub Actions (or similar tools like CircleCI, Jenkins) for CI/CD pipelines.
  • A solid grasp of security best practices, authentication, and secrets management.
  • Team player familiar with Agile, JIRA, Git workflows, and PR reviews.
Nice to have
  • Experience with distributed systems, ECS Service Connect, API Gateway, or App Mesh.
  • Integration with CDP platforms like Segment, RudderStack, or Hightouch.
  • Knowledge of data pipelines (Airflow, Luigi) or stream processing (Kinesis, Spark).
  • Familiarity with monitoring tools like Datadog, Prometheus, or APMs.
Key responsibilities
  • API & Service Development: Design, build, and maintain scalable FastAPI-based services and RESTful APIs using Python, emphasizing performance, security, and maintainability.
  • Database Architecture: Architect and optimize PostgreSQL databases (including RDS and Aurora), NoSQL solutions (e.g., DynamoDB, MongoDB), and search systems using OpenSearch. Leveraging caching solutions to help optimize performance while maintaining consistency.
  • Message Brokers & Async Tasks: Implement event-driven architectures using Redis, RabbitMQ, Celery, or Kafka for real-time data processing, task queues, and asynchronous workflows.
  • Cloud Infrastructure: Containerize applications using Docker and deploy/manage them on AWS ECS or EKS, ensuring scalability, resilience, and cost efficiency.
  • AWS Integration: Leverage AWS services (e.g., Lambda, S3, IAM, CloudFormation) to build and maintain secure, cloud-native backend systems.
  • Testing & Quality: Write comprehensive unit and integration tests using pytest, ensuring code reliability and adherence to business logic.
  • CI/CD Pipelines: Configure and optimize GitHub Actions workflows for automated testing, deployment, and infrastructure management.
  • Authentication & Security: Implement secure authentication/authorization flows (e.g., OAuth 2.0, OIDC, JWT) and enforce security best practices (e.g., RBAC, encryption).
  • Data Modeling: Design efficient database schemas, optimize query performance, and ensure ACID compliance for transactional systems.
  • Collaboration: Work closely with the frontend Team and product Teams to align technical solutions with business goals.

About Spyrosoft

Spyrosoft is an authentic, cutting-edge software engineering company, established in 2016. In 2021 and 2022, we were among the fastest growing technology companies in Europe, according to the Financial Times. We were founded by a group of tech experts with established backgrounds in software engineering, who created an ‘engineer-to-engineer’ workplace, powered by enthusiasm, fairness and authentic relationships. Having a unique offering, which bridge the gap between technology and business, we specialise in technology solutions for industry 4.0, automotive, geospatial, healthcare & life sciences, employee experience & education and financial services industries.

Benefits

More reasons to work with us

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Work from home or the office

Depending on the position, you can work remotely, from the office or in a hybrid model.

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Top-of-the-line equipment

We provide the equipment that best suits your needs and the requirements of your role.

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Training budget

Use your personal training budget to gain new skills and knowledge.

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Internal initiatives

Take part in our knowledge-sharing meetups organised by and for tech enthusiasts.

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Private health insurance

Keep your health in check with easy access to medical professionals.

Recruitment process

It only takes a few steps

Different roles have different requirements, so the recruitment process depends on the specific position you are applying for.

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Checking your CV

We read every resume we receive carefully. If you meet our requirements, we will call you to learn more about your expertise and needs.
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Evaluating your qualifications

After an initial phone call, we check your skills with a task related to your position and provide you with feedback afterwards.
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Making an appointment

The next step is a meeting at our office or online, where you can learn more about the team and our work culture from a Spyrosoft manager and/or partner.
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Getting the answer

At Spyrosoft, we contact every person participating in the recruitment process. Upon acceptance, we will provide a list of the next steps.

Meet the recruiter

Justyna Janczur Spyrosoft

We offer more than just a job, but a journey of growth and discovery. Stay curious, think boldly and always bring your authentic self to the challenge.

Justyna Janczur

Senior Recruitment Specialist

Meet the recruiter

Katarzyna Franczek Spyrosoft

At Spyrosoft, we’re always working as a team. The success of the whole company depends on finding the right people.

Katarzyna Fraczek

Lead Recruitment Coordinator

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CONTACT OUR RECRUITMENT TEAM

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Senior Backend Engineer (Python & FastAPI)

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