Lead Software Engineer (MongoDB / Node.js / JavaScript)

As a Lead Engineer, you'll play a pivotal role in shaping the technical direction of the product. You'll guide a talented squad of engineers, drive architectural decisions, and deliver scalable backend systems that directly impact thousands of users.

This is a hands-on leadership role where you'll balance technical excellence with mentorship, collaboration, and strategic thinking.

• Set the technical direction and lead architectural decision-making
• Mentor and support junior and senior engineers
• Conduct code reviews and uphold engineering best practices

• Build and maintain scalable backend services and RESTful APIs
• Design and optimise MongoDB database solutions
• Improve and maintain existing backend infrastructure
• Troubleshoot production issues and implement robust solutions

• Work closely with cross-functional teams to deliver meaningful customer outcomes
• Participate in technical interviews and help grow the engineering team
• Drive improvements in processes, tooling, and development practices

You'll thrive if you have experience with:

• MongoDB (data modelling, indexing, aggregation, performance tuning)
• Node.js and the wider JavaScript/TypeScript ecosystem
• Express.js and/or Fastify
• RESTful API design
• AWS or similar cloud platforms
• Microservices architecture
• Testing frameworks (Vitest, Jest, Mocha, etc.)
• CI/CD pipelines & DevOps practices
• GitHub workflows
• Observability tools (e.g., DataDog)
• Docker / Kubernetes

• Node.js, JavaScript/TypeScript
• Express.js, Fastify
• MongoDB
• AWS
• Vue.js, Nuxt.js

Not essential, but a big bonus:

• Integrating AI/ML models
• Working with LLM APIs (OpenAI, Anthropic, etc.)
• Prompt engineering
• AI workflow tools (LangChain, Flowise)
• Building internal AI automation tools

This company genuinely invests in its people. You'll enjoy:

• Remote-first working with offices in London, Manchester
• Flexible hours
• 25 days annual leave + 8 bank holidays + 2 Christmas shutdown days
• Option to purchase an extra week off