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