About InvestEngine

InvestEngine is a fast-growing fintech based in London, on a mission to make ETF investing simple and accessible. Over 150,000 clients have trusted us with more than £2,7 billion in assets — and we’re just getting started. We’ve been featured in MoneyWeek, Finder and Forbes, and we’re scaling quickly with big ambitions.

About the Role

We’re looking for a Lead Backend Engineer to join and lead our Pension Team — a backend-focused team working on one of InvestEngine’s key product areas.

This role combines strong hands-on backend engineering with team leadership. In the first months, you’ll be expected to contribute to the codebase while gradually taking ownership of the team’s delivery, processes, and technical direction.

You’ll work closely with backend engineers, product managers, QA, and business stakeholders to plan and deliver both day-to-day product improvements and larger technical initiatives. One example of the scale of work could be migrating from one pension provider to another, which would require careful backend design, infrastructure changes, coordination with the business, and strong ownership throughout the process.

What You’ll Do

• Design, develop, and maintain backend services in Python 3.11 using Django / DRF
• Lead architectural discussions and contribute to long-term technical strategy
• Work with MySQL and Redis to optimize performance and scalability
• Build and improve RESTful APIs for internal and external integrations
• Continuously improve system performance, reliability, and scalability as we grow
• Collaborate with Product, Compliance, and Business teams to deliver impactful features and automate back office processes and workflows.
• Investigate and resolve production issues, identify bottlenecks, and reduce tech debt
• Apply best practices in Git workflows, CI/CD pipelines (TeamCity, GitHub Actions), and code quality
• Drive improvements in our architecture, development processes, and internal tooling