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Modulr is a rapidly growing fintech company building digital payments infrastructure for businesses across the UK and Europe. The company provides a modern payments platform that enables businesses to open accounts instantly, automate payments and reconciliation, and integrate seamlessly via APIs. Backed by PayPal Ventures, FIS Ventures, and leading growth investors, Modulr is experiencing significant expansion.
As Full Stack Lead Engineer, you will build and lead an autonomous engineering squad, driving technical excellence while remaining deeply hands-on with core development. This is a blend of hands-on Python/FastAPI development, technical leadership, mentoring, and operational excellence.
Key responsibilities include:
- Lead a squad of software engineers, driving technical excellence through code reviews, architectural guidance, pair programming, and mentoring with emphasis on Python and FastAPI best practices
- Write production-quality Python code, designing high-performance REST APIs, managing databases, async operations, and establishing coding standards
- Own backend architecture decisions and lead design of scalable systems using Python, PostgreSQL/MySQL, caching layers, and message queues
- Lead technical strategy for AWS cloud deployments, ensuring security, reliability, and scalability
- Mentor team members to develop full-stack expertise through 1-on-1s, code reviews, and pair programming
- Plan squad deliverables and delegate responsibilities clearly, ensuring well-defined goals and progress tracking
- Collaborate with Frontend, DevOps, and Product teams to deliver integrated solutions
- Drive agile practices and conduct productive ceremonies (standups, sprint planning, reviews, retros)
- Drive hiring and recruitment, conducting technical interviews and candidate evaluations
- Report on squad progress and technical achievements to leadership
Required qualifications: 9+ years expert-level Python proficiency with deep knowledge of frameworks, async programming, and backend best practices. Strong hands-on experience with FastAPI, building high-performance REST APIs, dependency injection, validation, and async operations. Solid experience with React and modern JavaScript/TypeScript, with understanding of full-stack integration patterns.
