Senior Full-Stack Developer

Purpose

The Senior Customer Engineer is a Full-Stack Engineer responsible for the technical direction and implementation of all of Abel & Cole’s customer-facing technologies. The role comprises hands-on software development as well as technical leadership and contribution to systems architecture. The Senior Customer Engineer plays a key role in shaping and implementing best practice to ensure a smooth Software Development Lifecycle across a broad range of products.

It’s an excellent role for an engineer who wants to grow their range across web and mobile and all the technologies that support them.

• Web:
  Next.js, Type Script, Zustand, SCSS, React Testing Library, Storybook
• Mobile:
  React Native, Type Script, React Navigation, React Hook Form, Reanimated, Firebase, Braintree
• Backend: .NET API (OpenAPI/Swagger)
• Testing & CI/CD:
  Jest, React Testing Library, Azure Dev Ops, Code Push
• Environment/Platform:
  Azure Cloud, templated infrastructure

• Development and maintenance of several customer-facing products, including websites and mobile apps written with Next.js and React Native.
• Integration of our REST APIs using typed, code-generated (OpenAPI/Swagger) clients.
• Contribute to our APIs — extending, updating, and maintaining the backend endpoints that power both platforms (.NET).
• Own features end-to-end — from technical design through delivery, release, and monitoring.
• Provide technical leadership and hands-on guidance to the engineering team, setting coding standards, architectural direction, and best practices across the codebase.
• Identify and address technical debt, performance bottlenecks, and reliability issues in existing systems.
• Champion best practices across development, Dev Ops, and security.
• Help maintain and improve app store releases and multi-environment builds.
• Collaborate with cross-functional stakeholders to prioritise the roadmap, balancing new feature delivery against consistency of service.
• Mentor mid- and junior-level engineers through code review, pairing, and technical guidance.
• Collaborate closely with Product, Design, and QA in an agile team.
• Evaluate and recommend new tools or frameworks that could improve team velocity or system capability. Monitor developments of the frameworks in use.

• Significant commercial experience as a full-stack engineer, with strong Type Script.
• Proven experience with React and React Native, including shipping apps to the App Store and Google Play.
• Experience building web applications with Next.js (or strong React web experience).
• Solid understanding of consuming REST APIs (experience with a .NET backend a plus).
• Experience with state management using React Context and hooks.
• Strong automated testing habits — Jest, React Testing Library.
• Confident with Git and CI/CD pipelines (Azure Dev Ops ideal).
• Excellent communication skills and a collaborative mindset to ensure teams grow their skills together.
• Familiarity with Agile practices and how they relate to the Software Development Lifecycle.

• SQL / relational database experience (writing and optimising queries, working with schemas).
• Native mobile experience — iOS (Swift/Objective-C, Cocoa Pods) and/or Android (Kotlin/Java, Gradle), including building or maintaining native modules.
• In-app payments integration (Braintree, Stripe, or similar).
• Firebase (Crashlytics, Cloud Messaging/push, Remote Config, Analytics, Performance).
• Animation libraries (Reanimated, Lottie).
• SCSS / modern CSS, and state tooling such as Zustand.
• Experience integrating customer engagement platforms (e.g. Insider, Dynamic Yield, etc.).
• Mobile performance profiling and crash triage.

• Bold, genuine, and collaborative — reflects Abel & Cole’s friendly, supportive, and irreverent culture.
• Takes ownership of features end-to-end, from technical design through to delivery and monitoring, and takes pride in the quality and reliability of what’s shipped.
• Comfortable balancing hands-on delivery with technical leadership and architectural decision-making.
• Good agile leadership qualities, skilled in helping teams arrive at decisions, with a strong affinity for Scrum values…