Python developer for financial SaaS

We have 30 years of expertise in designing and building custom software systems. We provide software development services focusing on complex high-load applications, AI and BI solutions, and mobile apps. We are looking for an experienced Software Engineer with strong hands-on experience in Python, Java, AWS Lambda and AI Agents for a leading European cloud-first SaaS platform for CFOs, trusted by over 6,500 companies worldwide. Our system unifies data from hundreds of ERPs into a single source of truth and uses AI agents to automate financial close, planning, and audit processes.

• Develop and maintain the API for a customer-facing financial data collection product.
• Manage AI agents (Claude Code, Codex): write prompts, review agent output, keep instructions up to date.
• Take full end-to-end ownership of quality: write tests and independently verify features in deployed environments.
• As the project evolves — gradually take on front-end tasks (our preferred stack is Angular, with some React) as part of the transition to a full-stack model.

• 6+ years of commercial experience with Python 3.12 (FastAPI, Pydantic v2).
• OR strong experience in Java / .NET with a genuine desire to transition to Python for server-side development (we will provide support and time for cross-training).
• Experience with AWS Serverless (Lambda, DynamoDB single-table design, EventBridge, SQS/SNS, S3).
• Real hands-on experience using AI agents for code generation in a production environment.
• Testing and quality stack: pytest (with DynamoDB Local), uv, Ruff, mypy.
• Understanding of IaC (Terraform) and CI/CD (GitHub Actions).
• Understanding of event-driven and multi-tenant SaaS architecture patterns.
• English level B2+.

• Collaboration via a B2B contract with payments in USD or EUR, depending on your preference, or through a labor contract if you are based in Georgia, Serbia, or Kazakhstan.
• Flexible work schedule.
• Possibility to work remotely.
• Opportunities for professional growth.
• A company laptop to ensure a comfortable and efficient work setup.