Senior/Lead Python Engineer

S-PRO, a top-tier Digital Innovation and Software Engineering company. We specialise in providing cutting-edge services for fast-growing businesses and enterprises, with a strong focus on Finance, Renewable Energy and Healthcare domains and expertise in AI, Blockchain and Data Science. Our team of over 200 dedicated professionals works tirelessly across our global offices to develop innovative digital solutions that drive sustainable business value and increase our client’s competitiveness in a dynamic digital landscape.

About the project:
We’re looking for a hands-on Senior Backend Engineer to join a long-term product collaboration with an established European investment company. The company has been successfully managing multi-billion euro assets for 30+ years and is now actively investing in AI-driven innovation. You’ll work closely with a highly professional internal team — analysts, portfolio managers, and risk experts — to bring modern, impactful solutions into their everyday operations.

What You’ll Be Working On:

• AI-powered internal platform already in production

• Integration of LLM models for internal use

• Decision-making automation workflows

• Chat-based assistants for analysts and project managers

• End-to-end ownership: from architectural design to production deployment

You’ll be deeply involved in technical decision-making and have a direct impact on the business, with no intermediaries — close collaboration with the client team is part of your daily routine.

Requirements

Key Responsibilities:

• Lead project planning and translate high-level ideas into executable technical work

• Stay hands-on while supporting and mentoring a small engineering team

• Design and develop scalable APIs using Python and AWS Lambda

• Define and manage OpenAPI contracts for backend services

• Build and evolve PostgreSQL data models on AWS RDS

• Maintain infrastructure as code using Terraform (Lambda, ALB, RDS, S3)

• Create efficient CI/CD pipelines via GitLab

• Integrate Amazon Bedrock for AI workflows (e.g., document summarization)

• Participate in sprint planning, code reviews, and stakeholder syncs

• Advocate for best practices in testing, security, and collaboration

Requirements:

• 5+ years of Python 3 experience

• Solid experience with FastAPI or similar frameworks

• Production experience with AWS Lambda and API Gateway/ALB

• Strong knowledge of PostgreSQL in cloud environments

• Terraform expertise for cloud infrastructure provisioning

• Familiarity with OpenAPI/Swagger

• Proficient in Git workflows and GitLab CI/CD

• Confident with Amazon S3 in production

• Comfortable working in Agile teams and cross-functional settings

• Strong communication skills and fluent spoken English

Nice to Have:

• Experience leading technical projects or small teams

• Experience with Amazon Bedrock or other LLM integrations

• Background in fintech or asset management is a plus

• Knowledge of AWS monitoring tools (e.g., CloudWatch, X-Ray)

• Understanding of serverless security best practices

• Previous consultancy or client-facing experience

What we offer:

• Long team focus: we create an environment of transparent communication, and minimal bureaucracy, which leads to long-term relationships.

• Development of niche expertise: we are working in several niches, such as FinTech, healthcare, and logistics. Therefore, our employees can develop their own expertise in these domains.

• Continuous learning: we create employee development plans / personal roadmaps /quick promotion processes.

• Internal career development: 80% of our current executives were promoted to those positions within S-PRO. We encourage initiative. If a person wants to set new challenges and grow, we will definitely support them.

Benefits and perks:

• Flexible schedule.

• Remote work model.

• Medical insurance

• Paid vacations

• Paid Sick-leaves.

• Paid State holidays.