Senior Full Stack Developer

We're looking for a Senior Full Stack Developer to join our cross-functional team during an exciting period of growth and technical evolution. You'll work alongside other senior engineers on projects that span our marketplaces, subscription applications, and internal business management tools with responsibilities that shift based on what each project needs. 

This role is genuinely full stack. One week you might be architecting database schemas and API endpoints; the next, you're building responsive React interfaces or integrating AI capabilities into our call centre systems. We need someone who's equally comfortable across the entire stack and energised by variety. 

What You'll Actually Be Doing 

We're modernising our infrastructure, migrating legacy systems to a TypeScript-first stack whilst building new AI-powered features. But this isn't a solo mission. You'll be collaborating with other senior engineers, sharing architectural decisions, and contributing to a codebase that multiple teams depend on. 

Your projects will vary significantly. You might spend a month leading a database migration, then shift to building streaming AI chat interfaces, then move to optimising frontend performance. This variety is a feature, not a bug, we're looking for engineers who thrive when their responsibilities evolve with the needs of the business. 

Here are some examples of what we're working on right now: 

• Refactoring monolithic services into modular, type-safe architecture without disrupting live systems
• Integrating Ai APIs (OpenAI, Anthropic, Gemini, Llama) into our call centre and customer support workflows
• Building real-time AI features with streaming responses and proper error handling
• Designing database schemas that support both traditional business logic and AI features like embeddings and conversation histories
• Creating accessible, responsive interfaces with App Router and React Server Components
• Establishing observability and monitoring for both traditional services and AI integrations

What We're Looking For 

• Technical Foundation (5+ years)
• Strong TypeScript skills, you're comfortable with advanced types, generics, and building type-safe systems end-to-end
• Production experience with (App Router), React, and modern frontend patterns
• Solid backend development with or NestJS
• Expert SQL knowledge and experience designing relational databases at scale
• Experience with ORMs like Drizzle, Prisma, or TypeORM
• Understanding of API design, whether REST, tRPC, or similar Practical Experience
• You've worked on real production systems with real users and real consequences
• You've dealt with legacy code and know how to refactor it respectfully
• You're familiar with modern deployment practices, CI/CD, and cloud infrastructure (we use AWS, Azure, Vercel, Planetscale)
• You've debugged performance issues, optimised queries, and made systems faster
• You write tests and believe in code quality, but you're pragmatic about when perfect is the enemy of good Beneficial Experience.

These aren't requirements, but they'd help you hit the ground running: 

• You've integrated AI/LLM APIs into production applications
• You understand prompt engineering and the practical limitations of current AI models
• You've worked with PlanetScale, Drizzle ORM, React Query, and Tailwind CSS
• You've built features involving real-time data, streaming, or WebSockets
• You have experience with marketplace platforms, fintech, or SaaS products
• You've mentored other engineers or contributed to technical documentation

Working Style 

Beyond technical skills, we're looking for someone who: 

• Collaborates well - You'll be working closely with other senior engineers, so you need to communicate clearly, give helpful code reviews, and be open to feedback
• Takes ownership - When you pick up a project, you see it through. You proactively identify problems and propose solutions
• Stays pragmatic - You balance technical excellence with shipping features. You know when to refactor and when to ship
• Adapts to change - Your responsibilities will shift between projects. You're comfortable with this fluidity rather than frustrated by it
• Thinks in systems - When building a feature, you consider the broader implications: performance, security, maintainability, user experience.

Our Stack 

Here's what you'll be working with: 

• Languages & Frameworks: TypeScript, 15+, React 19+, , NestJS
• Frontend: Tailwind CSS, shadcn/ui, React Query (TanStack Query)
• Backend & Data: PlanetScale (MySQL), Drizzle ORM, oRPC, OpenAPI
• AI & Integration: OpenAI, Anthropic Claude, Google Gemini, Vercel AI SDK
• Infrastructure: AWS (including Bedrock), Upstash (Redis), Axiom for observability
• Tools: pnpm, Git/GitHub, monorepo architecture