Senior Python Developer

ELEKS Software Engineering and Development Office is looking for a Senior Python Developer in Ukraine.

ABOUT PROJECT

Our client is building and integrating a solution for a large-scale mission-critical data platform.

REQUIREMENTS

• 7+ years of hands-on commercial experience with Python in production environments
• Strong knowledge of Python fundamentals and the standard library, including concurrency, threading, multiprocessing, and asynchronous I/O
• Experience designing and developing service-oriented or microservice-based architectures
• Strong SQL and PostgreSQL knowledge, including transactions, locking, isolation levels, indexing, and query optimization
• Solid understanding of database and distributed-system concepts, including OLTP vs. OLAP, ACID, CAP, consistency, idempotency, and failure handling
• Experience building secure, production-grade APIs
• Hands-on experience with Redis, asynchronous workers, and message brokers
• Practical experience with Docker, CI/CD, automated testing, logging, monitoring, and performance profiling
• Strong system design skills and readiness to discuss architectural decisions during the technical interview
• Ability to work independently, solve complex engineering problems, and clearly explain technical decisions
• Upper-Intermediate or higher English proficiency

NICE TO HAVE

• Experience with PostGIS, GeoPandas, geospatial data pipelines, or Geo OLAP workloads
• Experience with real-time or event-driven systems
• Familiarity with MongoDB, FastAPI, Kubernetes, JavaScript, or React
• Experience developing mapping, logistics, intelligence, or other mission-critical systems
• Hands-on experience with Django or Django REST Framework

RESPONSIBILITIES

• Design, develop, and integrate Python services within a large-scale mission-critical situational-awareness platform
• Build secure, production-ready APIs and backend components using suitable Python frameworks
• Design reliable data-processing workflows for transactional, analytical, and geospatial workloads
• Work with PostgreSQL, PostGIS, Redis, and analytical or NoSQL data stores
• Implement asynchronous and event-driven processing using workers, queues, and message brokers
• Address concurrency, data consistency, idempotency, and service-failure scenarios
• Integrate OAuth2-based authentication and external identity providers
• Maintain automated tests, observability, Docker-based environments, and CI/CD pipelines
• Participate in system design, architectural decision-making, performance optimization, and production troubleshooting

WHAT YOU WILL GET WITH ELEKS

• Close cooperation with a customer
• Challenging tasks
• Competence development
• Team of professionals
• Dynamic environment with low level of bureaucracy

ABOUT ELEKS

ELEKS is a custom software development company. We deliver value to our clients, thanks to our expertise and experience gained from working as a software innovation partner since 1991.

Our 2000+ professionals located in the Delivery Centers across Eastern Europe and sales offices in Europe and North America, provide our clients with a full range of software engineering services. These include product development, QA, R&D, design, technology consulting and dedicated teams.