Senior Python Back-end Developer

Nabízím práci
Jméno/Firma
Aval24
Pracoviště
Praha
Nabízím práci/ Hledám práci
Nabízím práci
Vytvořeno
28. 2. 2026

O pozici

We are currently looking for talent to join a fast-growing Czech FinTech environment (nonbank lender) that is entering a new phase: evolving a fast-moving startup product into a stable, sustainable enterprise platform.

The role involves supporting an existing legacy system while helping build a modern, nextgeneration solution in parallel - and we’re expanding our team to drive this transition.

Joining this team means working with a modern tech stack, shaping architecture, and influencing how a proven startup grows into a long-term, resilient product.

As a Python Engineer, you will:

  • design product architecture and implement simple and complex features

  • suggest improvements across technical and product areas

  • help break down epics and provide technical estimates

  • work closely with other developers, QA engineers and managers

  • work with business consultants to understand and address needs of business

What skills should you have?

  • senior-level back-end Python programming with a proven track record of delivering systems to production

  • developing clean modules and maintaining high code clarity

  • designing and implementing backend services and APIs

  • thinking in terms of maintainability, clarity, and long-term evolution of systems

  • hands-on experience with MongoDB or similar document databases

  • understanding of message queues and event-driven communication patterns

  • ability to quickly learn new frameworks, tools, and patterns when needed

  • have strong testing culture: write unit (component, integration, and end-to-end tests when applicable) for your features

  • using type checking and static analysis as part of daily workflow

  • ability to provide thoughtful, constructive code reviews and have commitment to engineering excellence

Additionally it would be great if you:

  • have experience in FinTech / lending / payments domain

  • have experience with AWS (or GCP, Azure) services and cloud infrastructure

  • have solid Docker skills and understanding of containerized environments

  • are able to work with CI/CD systems (GitHub, GitLab) and are not afraid to write/setup pipeline yourself

  • are comfortable with infrastructure-as-code and automation practices

Tech stack - tools that we currently use or plan to use in the future:

  • Python 3.1X, FastAPI, Pydantic, Pytest, Mypy (we’re planning to try ty)

  • ruff, uv, Docker, AWS (SDK, CDK, CloudFormation, EC2, ECS, Fargate, S3, Dynamo, Kinesis, SQS, AWS Lambda, CloudWatch, SSM)

  • OpenTelemetry, Prometheus, Grafana, Ansible, GitLab CI/CD

What we offer:

Meaningful Technical Growth

- deep, handson work with modern Python tooling and cloud technologies

- real ownership of architecture and longterm technical direction

Build Engineering Culture You Can Be Proud Of

- strong focus on code quality, clarity, and maintainability

- pragmatic decisionmaking - no overengineering, no unnecessary bureaucracy

- a team that is actively shifting toward thoughtful engineering over rushing features

High Impact on the Product

- direct influence on architectural decisions and system evolution

- close collaboration with product and business teams

Flexible, Modern Work Environment

- fully remote work setup with flexible working hours with the ability to collaborate during CET

business hours

- asyncfriendly communication that supports deep work

- international team with diverse perspectives and experience

Compensation & Benefits

- competitive salary and yearly bonuses

- paid time off and sick-days

This role may not be a good match if:

  • you need close guidance, stepbystep direction, or struggle to selforganize your work

  • ambiguous requirements frustrate you, or you prefer others to fully define solutions before you start

  • writing tests feels like overhead, or you tend to ship features without strong test coverage

  • you resist code reviews or see them as a formality rather than a collaborative quality practice

  • cloud infrastructure makes you uncomfortable, or you avoid DevOpsrelated tasks even when they’re simple

  • async communication feels slow or difficult, and you rely heavily on synchronous discussions to move forward

  • you prefer sticking to familiar tools and patterns rather than learning new ones when the situation calls for it

  • you avoid ownership, or you tend to overengineer or underengineer solutions instead of aiming for pragmatic clarity