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Senior Backend Engineer — Payments Team (Python)
About InvestEngine
We’re a London-based fintech on a mission to make ETF investing simple and accessible. Over 150,000 clients have trusted us with over £3 billion in assets — and we’re just getting started.
We’ve been featured by MoneyWeek, Finder and Forbes, and we’re growing fast with big ambitions.
About the Role
We’re looking for a Senior Backend Engineer to join our Payments Team and help us strengthen and scale a business-critical part of our platform.
You’ll work on complex backend challenges across payment flows, integrations and system reliability. You’ll contribute to architecture, improve system stability and scalability, and help evolve the technical foundations of our Payments domain.
You’ll collaborate closely with Engineering, Product, Compliance, Operations and other business teams to build reliable solutions and improve critical operational processes.
What You’ll Do
Design, develop and maintain backend services in Python 3.11 using Django / DRF
Contribute to the architecture and long-term technical development of our Payments systems
Build and improve RESTful APIs and integrations
Work with complex backend and legacy systems and identify root causes of technical problems
Continuously improve system performance, reliability and scalability
Investigate and resolve production issues and recurring problems
Work with MySQL and Redis
Participate in architectural discussions and contribute to technical decisions
Identify and reduce technical debt
Improve development processes, code quality and engineering practices
Collaborate with Product, Compliance, Operations and Business teams
Contribute to the evolution of our architecture and internal engineering tools
What We’re Looking For
4+ years of experience in backend development
Strong Python skills and deep knowledge of Django or similar frameworks
Solid understanding of relational databases, caching and high-performance backend systems
Experience with REST APIs, service design and distributed systems
Experience working with complex or legacy systems
Ability to independently investigate complex technical problems and identify root causes
Experience working with production systems and improving their stability
Strong ownership and ability to make sound technical decisions
Familiarity with Git, CI/CD practices and modern engineering workflows
Strong communication and problem-solving skills
English B2+ and fluent Russian
Nice to Have
Experience working in fintech, payments or another regulated industry
Familiarity with AWS and Docker
Experience with RabbitMQ, Kafka or other message brokers
Experience with payment providers or financial integrations
Contributions to open source or personal side projects
How We Work
We’re a lean, collaborative team where engineers have a real influence on architecture, technical decisions and engineering culture.
We value ownership, curiosity and continuous improvement. You’ll have the autonomy to make technical decisions and work on meaningful, business-critical systems without micromanagement or unnecessary bureaucracy.
Within the Payments team, you’ll help build systems that remain stable, reliable and scalable as the business grows.
What We Offer
Impact from day one — work on business-critical Payments systems
Technical growth — influence architecture and technical decisions
Hands-on engineering — solve complex backend challenges across production systems
Modern tech stack — Python 3.11, Django, MySQL, Redis, AWS, GitHub, TeamCity
Remote-first and flexible — work from anywhere, at your own pace
Unlimited vacation — take time off when you need it, no fixed limits
Supportive team — thoughtful, skilled colleagues who care about quality and results
Hiring Process
Intro call with our Talent team
Technical interview with the Backend team
Gamified cognitive assessment to understand how you think and problem-solve
Final conversation with our CTO
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