Senior Python Developer
Summary
Senior Python developer building mission-critical backend microservices for a global investment-banking client. Day to day: designing and scaling Python services (FastAPI, AsyncIO), integrating via REST/Kafka, and working with PostgreSQL/MongoDB, Redis, and Docker/Kubernetes in a hybrid Kraków setup.
You will join a long-term, enterprise-scale project for a global client in the investment banking domain. The project focuses on building and evolving a set of mission-critical backend services that support complex business workflows, regulatory processes, and system integrations across the bank's ecosystem.
The platform is based on a distributed microservices architecture, leveraging Spring Boot, event-driven communication, and BPM-driven process orchestration. The system operates in a cloud-enabled, containerized environment, with a strong emphasis on security, scalability, resiliency, and maintainability.
You will work closely with architects, QA engineers, DevOps, and business stakeholders in an agile setup, contributing not only code but also technical direction, best practices, and mentoring.
Responsibilities:
The Python Engineer's role is to design and implement scalable, production-grade backend systems and microservices. The person we are looking for should be able to develop clean, maintainable codebases, build and scale distributed services, implement well-known communication and integration patterns, and apply best practices for large-scale distributed systems.
Mandatory Skills Description:
- At least 8+ years of practical experience in Python development and delivering production systems.
- Advanced Python proficiency, especially in scalable, clean code architecture and microservices (e.g., FastAPI, AsyncIO)
- Solid understanding of API integration patterns and inter-service communication (e.g., REST, Kafka)
- At least two backend/data-intensive solutions successfully delivered to production, ideally involving high-throughput APIs, data pipelines, or search/retrieval systems
- Practical knowledge and hands-on experience with: Relational and NoSQL databases (e.g., PostgreSQL, MongoDB), caching layers (e.g., Redis), message queues, and containerization (Docker, Kubernetes)
- Strong grasp of software engineering fundamentals: data structures, algorithms, concurrency, asynchronous programming, and API design (REST/gRPC)
- Solid understanding of testing practices: unit, integration, and end-to-end testing (e.g., pytest), plus CI/CD pipelines
- Ability to evaluate trade-offs and select appropriate tools, frameworks, and architectural patterns for a given problem
- Experience with PoC development and iterating quickly based on results
- Familiarity with cloud platforms (e.g., Azure, AWS, GCP) and infrastructure-as-code
- Strong debugging, profiling, and optimization skills for high-performance Python applications
Hybrid work (3 days/week from the office)
What do we offer our employees?
- Copyrights which means higher net salary for Developers
- Fully remote recruitment process
- Stable employment based on an employment contract
- MyBenefit program (sports card, well-being program etc.)
- Employee assistance program for you and your family! (consultations with a psychologist, coaching sessions, assistance in private life)
- LuxTalent platform (webinars, training, courses with certificates)
- Internal Mobility program - possibility of rotation between projects, locations, accounts