Technical Architect
Technical Architect / Principal Engineer
London (hybrid)
90k to 105k
We’re partnering with an ambitious London-based payments start-up looking to hire a hands-on Technical Architect / Principal Engineer to help shape the next generation of their platform as they scale.
This is a high-impact opportunity for a senior engineering leader who enjoys operating across architecture, platform engineering, product delivery, and technical strategy in a fast-moving environment.
You’ll play a key role in defining engineering standards, influencing product direction, and building scalable systems capable of supporting rapid growth within a modern payments ecosystem.
The Opportunity
Joining at an exciting stage of growth, you’ll work closely with founders, product teams, and engineers to design and deliver a highly scalable payments platform using modern cloud-native technologies.
This role combines:
- hands-on engineering,
- technical leadership,
- architecture ownership,
- and mentoring responsibilities.
You’ll be expected to remain close to the code while driving best practice across the wider engineering function.
Key Responsibilities
- Define and evolve platform architecture across mobile, backend, and cloud infrastructure
- Lead engineering design decisions and establish scalable development standards
- Build and optimise high-performance backend services using Node.js
- Drive mobile architecture and delivery using React Native
- Own AWS infrastructure strategy, scalability, reliability, and security
- Work closely with product and leadership teams to shape technical roadmap
- Champion engineering excellence, DevOps culture, CI/CD, and automation
- Explore and implement modern AI-assisted engineering tooling and workflows
Required Experience
We’re looking for a strong technical leader with experience building scalable products within start-up or high-growth environments.
Essential Skills
- Strong experience with React Native
- Deep backend engineering expertise using Node.js
- Strong knowledge of AWS infrastructure and cloud-native architecture
- Experience working with PostgreSQL and scalable data design
- Proven experience operating at Technical Architect, Principal Engineer, or Staff Engineer level
- Experience building scalable distributed systems and APIs
- Strong understanding of modern software engineering best practices
Desirable Experience
- Payments, fintech, or regulated environment experience
- Exposure to AI-assisted development tooling such as Claude, GitHub Copilot, Cursor, or similar
- DevOps and infrastructure-as-code experience
What’s on Offer
- Opportunity to shape architecture from an early stage
- High ownership and autonomy
- Modern engineering environment
- Fast-growing fintech business with strong leadership backing
- Competitive salary + equity potential
- Hybrid working in London