Senior Python Engineer

Summary

• Senior Python Engineer for Pathfinder (strategic roadmapping & portfolio planning platform) at a travel agency.
• Focus: backend, data processing, APIs, performance & scalability. Ukraine, ФОП 3 група

About the Client & Project

We are partnering with a travel agency. You will join a cross-functional team building Pathfinder - a complex, data-heavy web application designed for strategic roadmapping and portfolio planning.

The focus of this role is backend engineering, data processing, APIs, performance, and scalability.

About the Role

As a Senior Python Engineer, you will become part of a mixed internal and client-side team that includes:

• Senior Python Engineer(s)
• Senior Full-Stack Engineer
• Senior JavaScript Engineer
• Senior AQA / Manual QA
• Senior DevOps
• Senior Product Designer
• Solution Architect

You will work closely with the Solution Architect and the rest of the team within a shared tech stack. The environment is lean, fast-moving, and start-up-like, with evolving requirements.

Key Responsibilities

• Design and develop robust, scalable backend services and APIs
• Build efficient solutions for large-scale data processing, transformation, and aggregation
• Implement appropriate caching, queuing, batch processing, and optimisation where needed
• Write clean, testable, and maintainable code with strong automated test coverage
• Investigate and resolve complex technical and performance issues
• Collaborate closely with Solution Architect, AQA, Manual QA, and Front-end developers
• Design solutions with performance, scalability, reliability, and maintainability in mind
• Make pragmatic technical decisions considering cost, performance, and development effort
• Challenge unnecessary complexity and deliver what is actually needed

Requirements

• Strong commercial experience with Python and modern Python frameworks
• Proven ability to design and develop robust, scalable backend services and APIs
• Experience building efficient large-scale data processing, transformation, and aggregation solutions
• Strong knowledge of SQL and relational databases (query optimisation and data modelling)
• Experience with REST APIs, service integration, and asynchronous / background processing
• Solid understanding of software architecture and engineering principles (beyond framework-level development)
• Ability to analyse technical problems and choose the most appropriate solution
• Comfort working with complex data models and business logic
• Strong focus on performance and efficiency, especially when processing large datasets
• Clear understanding of the trade-offs between simplicity, scalability, and maintainability

Note: AWS experience is not required.

Nice to Have

• Strong engineering fundamentals and a pragmatic, no-over-engineering mindset
• Ability to take ownership of technically challenging backend and data-processing problems and deliver robust, evolvable solutions

Engagement Details

• Location: Ukraine
• Contract type: ФОП 3 група (FOP 3rd group)
• Model: Direct Hire
• Duration: 4 months (November start - contract will not be prolonged)
• Start date: Beginning of November
• Working hours: European time zone