Job description

Senior Full-Stack Software Engineer (Python | FastAPI | PostgreSQL | React)

We’re looking for a Senior Python Developer to join a growing fintech team focused on delivering robust, compliant, and intelligent software solutions, if you have led projects & mentored Developers in the past and want to take your career to the next level, then this is the role for you.

In this role, you’ll work across the stack—driving API development, improving architecture, contributing to clean and scalable code, and enabling front-end progress. You’ll collaborate with distributed teams across the globe while helping shape a platform that leverages modern AI tooling and strong engineering practices.

What You’ll Do

Drive full-stack development across Python-based APIs, database queries (PostgreSQL), and deployment pipelines to support ongoing feature delivery.
Build and maintain automated testing frameworks (unit, integration, end-to-end) to ensure reliability and product quality.
Participate in code reviews and uphold secure coding standards.
Engage in agile ceremonies including standups, sprint planning, and retrospectives.
Collaborate closely with global engineering teams to maintain consistency and scalable architecture.
Use AI-powered developer tools to improve velocity and enhance coding workflows.
Document systems, architecture, and workflows to support long-term maintainability.

What You Bring

5+ years of software engineering experience with strong back-end development skills.
Proficiency in Python and experience building APIs (FastAPI preferred).
Experience with ReactJS or modern front-end frameworks.
Strong knowledge of PostgreSQL and the ability to write/read SQL queries.
Experience integrating REST APIs and WebSockets.
Comfort with Git/GitHub workflows, code reviews, and CI/CD pipelines (GitHub Actions or Azure DevOps).
Exposure to LLM/OpenAI APIs or front-end AI/ML integrations such as chat interfaces or semantic search.
Familiarity with prompt engineering, embeddings, or vector search workflows.
A security-first mindset with an understanding of secure coding, secrets management, and data privacy.
Strong communication and documentation skills, especially when working across time zones.
Collaborative, detail-oriented, and committed to producing clean, maintainable code.

If interested, please apply.

Please note:

We have a number of similar positions currently, and in the future, which we would like to discuss with you should you indicate your interest in this role. When we receive your application for this role, we will contact you to advise you of our process for other similar positions.

Stelfox is fully compliant with GDPR regulations and you can read more in our privacy policy here: https://www.stelfox.com/privacy-policy-gdpr/

Your shared data will not be disclosed or transferred to a third party data controller or data processor located outside the EEA unless we have obtained your express consent.

We look forward to working with you.