Senior Fullstack Engineer

About Allica Bank

Allica is the UK’s fastest growing company - and the fastest-growing financial technology (Fintech) firm ever. Our purpose is to help established SMEs, one of the last major underserved opportunities in Fintech.

Established SMEs are the backbone of local communities - representing over a third of our economy - yet have been largely neglected both by traditional high street banks and modern fintech providers.

Role Description

The Senior Full Stack Engineer leads the technical design and delivery within a single squad and line-manages 1–2 Full Stack Engineers. The role exists to ensure the squad delivers secure, reliable, and accessible products, while maintaining high engineering standards and an excellent developer experience.

You will use your expertise in Spring Boot microservices (Kotlin/Java) and modern web technologies (React/TypeScript) to design and deliver complex features end-to-end. Our backend services run as containerised applications on Azure Container Apps, and our web applications are deployed via Azure Static Web Apps; you will ensure the squad’s services and applications are production-ready and effectively use these platforms.

You will drive best practices in observability, CI/CD, security, performance, and accessibility, ensuring systems meet the standards expected of a UK bank.

You will create and maintain Architecture Decision Records (ADRs) for significant decisions, aligning with organisation-wide patterns.

You are hands-on and collaborative: you design features, write code, review changes, mentor engineers in your squad, and work closely with Product and Design.

You model responsible, effective use of GenAI tools (e.g. GitHub Copilot) to improve productivity and quality.

Success in this role is measured by the squad’s delivery of complex features, improvements in SLOs and operational metrics, the health of the codebase, and the growth and effectiveness of your squad.

Principal Accountabilities

Lead the end-to-end design and delivery of complex features across the full stack using:

- Backend: Kotlin/Java Spring Boot microservices, containerised and deployed on Azure Container Apps, exposing REST/OpenAPI APIs and integrating with other services and data stores.

- Frontend: React/TypeScript, shared design system components, and agreed architectural patterns (e.g. Nx, micro frontends), deployed on Azure Static Web Apps.

Produce clear Architecture Decision Records (ADRs) for significant technical decisions, documenting context, options, trade-offs, and outcomes that align with organisation-wide standards.

Own and improve SLOs and operational metrics for the squad’s services; monitor error budgets, participate in incident response, and drive improvements to reduce incidents and MTTR.

Champion secure and compliant design:

- Apply secure coding practices and threat modelling.

- Ensure logging, audit trails, and data handling meet regulatory and privacy requirements.