Senior Back-End Engineer (Python)

We’re Senvio, a software agency based in Brno and Prague, specializing in helping companies modernize outdated systems and migrate to scalable, high-performance architectures. We collaborate with clients worldwide, with a strong presence in the Nordic region and the USA.

Position Description

We're looking for an experienced Back-End Engineer to join our team and help build the core of our platform from the ground up. You'll work directly on the product with real impact - not just on isolated tasks, but on the overall architecture, data pipelines, and AI-powered systems. 

Our company is built on people, especially people with an ownership mindset - competent enough to take responsibility, drive projects, be aware of dependencies, and overcome obstacles. We offer support and consultation, but try to stay away from micromanagement.

What You'll Work On

• Designing and building the core platform architecture from scratch - scalable, maintainable backend systems and services
• Defining and implementing a microservices architecture with clear system boundaries
• Building data pipelines that transform raw and unstructured data into production-ready insights
• Developing systems that leverage LLMs (with a strong emphasis on Claude) for agent-driven use cases and automation
• Collaborating with Data Science and ML engineers to productionize models and experimentation workflows
• Owning reliability, performance, and observability across platform services
• Mentoring engineers and helping shape engineering best practices as the team grows

What You Should Bring

• 5+ years of experience building backend or platform systems
• Strong knowledge of Python and modern backend frameworks (FastAPI, Django, Flask, or similar)
• Experience with distributed systems, microservices, or event-driven architectures
• Experience with cloud infrastructure (AWS) and containerized environments (Docker, Kubernetes, or similar)
• Experience with data pipelines, streaming systems, or large-scale data processing
• Hands-on experience integrating LLMs (Claude strongly preferred) and building AI-powered applications
• Ability to operate effectively in fast-moving, ambiguous environments with minimal structure

Bonus Points For

• Experience with agent-based systems, orchestration layers, or LLM-driven workflows
• Familiarity with vector databases, RAG architectures, or unstructured data processing
• Experience with event streaming technologies (Kafka, Kinesis, or similar)
• Experience building 0→1 products in a startup or high-growth environment
• Interest in AI-first development (Cursor, Claude Code, and similar tools)

What We Offer

• Real influence over architecture and product direction
• Opportunities to experiment with AI-first development
• A friendly and open company culture with plenty of shared activities (sports, console gaming, movie nights, table football, teambuilding events, shared breakfasts…)
• Flexible working hours and the option to work from home
• Offices in the center of Brno and in Prague
• Opportunities to attend conferences, workshops, and training

Sounds like you? Send us your CV or GitHub profile — we review every application personally and respond quickly.