Senior React Native Engineer

Senior React Native Engineer

Role type - Permanent

Location - Holborn, London (Hybrid)

About Zuno

Zuno is the cutting-edge technology platform powering the success of home heating and cooling experts, BOXT. Zuno is scaling for significant growth by continually developing its proprietary tech stack to empower both our installers and the homeowners of brands such as E.ON Next and BOXT.

Our platform manages the end-to-end installation process for a complete range of modern home energy solutions - from high-efficiency boilers and air conditioning to heat pumps, solar panels, battery storage, and EV chargers. No matter what we are installing, our ethos remains the same: we use technology to make buying, installing and maintaining products an efficient, stress-free, seamless experience for our users.

Every year millions of people come to our site to get a fixed-price quote. We’ve installed over 200,000 products so far, while establishing a network of more than 15,000 professionally accredited installers. Our revolutionary platform is market-leading. And we’ve got the supporters to shout about it. We’re backed by Brookfield and work in partnership with some of the world’s most famous household names.

The role

We’re looking for a Senior React Native Engineer to join our fast-paced, full-stack product team, delivering innovative solutions that enhance the experiences of our customers, installers, and operations team. As a Senior Engineer, you'll play a key role in refining business requirements, collaborating with your teammates to turn ideas into actionable tickets, and implementing solutions.

Your primary focus will be on our mobile applications (iOS/Android), built using React Native, while working closely with our backend services built in Ruby (Rails) with a Postgres database. Communication between the mobile apps and backend happens over a JSON API. You'll also lead by example in maintaining top-tier code quality by reviewing your teammates' work, sharing feedback, and welcoming input on your own.

Key responsibilities

• Mobile App Architecture & Development: Lead the architectural design, build, and maintain robust, scalable mobile applications using React Native (iOS/Android), ensuring seamless integration with our backend JSON APIs

• Technical Leadership: Act as a technical anchor for the mobile stack, taking a leading role in discussions around application structure, state management, and tackling new technical challenges

• Feature Ownership: Take ownership of complex mobile features from concept to deployment; assisting the Product Team in scoping requirements, providing technical insights, and managing technical debt

• High-Quality Engineering: Write clean, efficient, reliable, maintainable and well-documented code that adheres to best practices, driving the adoption of Test-Driven Development, test automation, and Continuous Delivery

• User Interface Excellence: Develop highly interactive, user-centric mobile applications with responsive UI/UX designs that ensure a seamless experience across iOS and Android

• Code Quality & Collaboration: Actively participate in code reviews to maintain high standards, providing constructive feedback to peers and incorporating feedback into your own work

• Mentorship: Actively mentor junior and mid-level engineers, fostering a culture of continuous learning and technical excellence within the mobile team

• Debugging & Maintenance: Proactively debug and resolve complex technical issues in production to ensure high app stability and performance

• Engineering Leadership & Advocacy: Proactively identify inefficiencies in our mobile development workflow or tooling (e.g. CI/CD, deployment pipelines) and lead the implementation of solutions.

• You will champion high-quality standards and hold the team accountable for best practices

• Continuous Improvement: Stay up-to-date with industry trends and emerging mobile technologies, bringing fresh ideas to the team to improve our mobile codebase, organisation, and automatisation

Skills

• 5+ years of professional experience in software development, with commercial experience with React Native

• Expertise in JavaScript, TypeScript, and React, including advanced state management and mobile performance optimisation

• Strong experience configuring and maintaining mobile build environments using tools like Expo

• Proven experience writing comprehensive automated tests (using frameworks such as Jest, React Native Testing Library, and test automation tools)

• Deep understanding of consuming and integrating with RESTful JSON APIs

• Proficiency with version control systems, particularly Git and GitHub, and modern workflows

• Proactive Problem Solver: A natural tendency to identify internal pain points and the initiative to propose and implement technical or procedural improvements. A proactive, self-motivated attitude with a passion for driving success

• Excellent communication skills and the ability to work effectively as part of a collaborative team or independently, including communicating technical concepts to non-technical stakeholders clearly

Beneficial skills/interests

• Experience leading or scaling a mobile development team in a high-growth environment

• Experience solving complex logistical problems with software

• Advanced experience with mobile CI/CD pipelines and deployment automation

• Experience working within Agile development methodologies

• Knowledge of AWS

Company Benefits

• 30 days annual leave + bank holidays

• Private medical cover with Aviva*

• 4 x salary Death in Service cover with Zurich*

• Paid 6 months maternity pay after a year of service

• Paid paternity pay after a year of service

• £1000 annual training budget*

• Salary sacrifice pension matched up to 6%

• Flexible working times and location

• Company MacBook Pro & accessories

• Team lunches, team events

*After probationary period

At Zuno Tech, we believe diverse perspectives make us better at what we do. We’re committed to fostering an inclusive, welcoming environment where everyone, regardless of background, identity, or experience, feels valued and supported. If you’re excited about this role but don’t meet every qualification, we encourage you to apply. Your unique perspective could be exactly what we need to grow and thrive.