Lead Software Engineer/Founding Engineer- Node.js and TypeScript, NestJS
We're partnering with an ambitious AI-led technology business that's using agentic AI to automate complex operational processes at scale.
As the company continues to grow, they're looking for a hands-on Lead Software Engineer to work closely with senior engineering leadership, driving architecture, leading delivery, and helping shape the next generation of AI-powered products.
This is a role for someone who enjoys solving difficult technical challenges, taking ownership, and remaining deeply involved in engineering rather than moving into pure people management.
What you'll be doing
- Designing and building scalable backend systems and APIs
- Leading the development of microservice and event-driven architectures
- Taking ownership of technical delivery across key product areas
- Mentoring engineers and setting engineering standards
- Working with AI-driven products, LLM integrations and agentic workflows
- Influencing architecture decisions and long-term technical direction
- Building secure, scalable and maintainable systems capable of supporting rapid growth
What we're looking for
- Strong commercial software engineering experience, ideally 5+ years
- Expert-level Node.js and TypeScript development experience
- Strong knowledge of NestJS and modern backend architecture
- Experience designing and building microservices and distributed systems
- Exposure to AI products, LLMs or agentic workflows
- Previous experience leading projects or small engineering teams
- Comfortable operating in a fast-paced startup or scale-up environment
- Experience with Next.js, Kubernetes, GCP and cloud-native technologies would be beneficial
This probably isn't for you if...
- You're looking for a large corporate environment with established processes and multiple layers of approval
- You enjoy specialising in a narrow area rather than owning problems end-to-end
- You see AI tooling as optional rather than a core part of modern software development
- You need extensive onboarding before becoming productive
- You're uncomfortable making decisions, taking ownership and being accountable for outcomes
Technology Stack (Not all required but to give you a flavour)
- Node.js
- TypeScript
- Next.js
- MongoDB
- AI Agents & LLMs
- Genuine technical ownership from day one
- Opportunity to shape architecture and engineering standards
- Equity alongside a highly competitive salary
- Work closely with experienced founders and engineering leaders
- Build products at the forefront of AI adoption
- Flexibility with access to a London office
This is a high-autonomy environment where strong engineers can have a significant impact on both the product and the wider business. If you enjoy building, leading and solving complex problems, we'd love to hear from you.
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Lead Software Engineer - Node, Typescript employer: Harvey Nash
Join a dynamic global banking organisation that prioritises innovation and employee development. With a collaborative work culture, comprehensive benefits, and ample opportunities for professional growth, this role as a SWIFT / Payments Project Manager offers a chance to make a significant impact in the financial sector while enjoying a supportive environment in a thriving location.
