Lead Developer (Mobile)

Summary

Salary: Competitive plus comprehensive benefits package 
Grade: 3A
Reporting Line: Development Manager  
Contract Type: Permanent
Location: London 
Closing Date: 17th June 2026

What to expect

The Lead Developer will define the technical direction, lead and mentor a team of Senior and Mid‑Level Software Engineers, and own the end‑to‑end development and delivery of the Post Office Mobile Travel App and in‑branch Government Service applications. You will be a key driver in leveraging modern engineering practices and cloud services to deliver secure, high‑quality, scalable mobile experiences across iOS and Android.

Success will be achieved by applying well‑architected code, robust full‑stack integration with Post Office digital services, strong CI/CD automation, and a culture of technical excellence. This role is for an experienced leader who has delivered eCommerce/retail‑grade mobile applications at scale, with production experience in React Native (TypeScript) and cloud platforms (e.g., AWS), and who thrives in Agile environments.

What we can do for you

Now, more than ever, we understand that attracting the right talent is pivotal in driving the positive change needed throughout our organisation. Beyond a competitive salary, we offer a comprehensive benefits package that includes:

• 27.5 days annual leave that increases with tenure

• Up to 18% on target bonus opportunity

• Car allowance

• Generous pension contribution

• Life assurance

• Income protection after 12 months service

• Full support from our employee assistance programme and access to our employee benefits platform

• Ever-evolving learning and development opportunities

Our commitment to embracing diversity extends beyond just words. We actively foster an inclusive workplace that values the unique perspectives and contributions from all colleagues. We hold the belief that Equity, Diversity, and Inclusion are not just vital but fundamental to our success and growth. Our priority lies in shaping a business that mirrors the diverse communities we reach, truly making Post Office 'Everybody's Business'. As an equal opportunity employer, we value and celebrate the differences among our people, ensuring that our practices reflect our dedication to inclusivity and equal representation for all.

What you’ll need to succeed

• 2–3 years of hands‑on team leadership and mentoring (goal setting, feedback, coaching, performance growth), with experience coordinating multiple workstreams


• 5+ years’ experience developing applications in a variety of languages and frameworks including ReactNative, TypeScript, Java, JavaScript, React, HTML, SCSS / CSS.


• Production experience building and scaling ReactNative iOS and Android apps, including navigation, state management, offline patterns, native modules/bridging, and performance tuning (e.g., Hermes, Flipper).


• Experience of cloud-native micro-services and distributed systems (ideally AWS)


• Experience with serverless cloud services (Lambda/Api Gateway/Cognito/DynamoDB)


• Understand and appropriately implement the WCAG (Accessibility) principles, guidelines and success criteria implemented


• iOS and Android app store submissions, code signing/provisioning, TestFlight/Play Console, Fastlane, phased rollouts, and OTA update strategies (e.g., CodePush/EAS Update)


• Strong understanding of data structures and architectures, using relational and/or non-relational database approaches with the ability to query using SQL


• A strong understanding of test-driven development and testing conventions


• Experience of developing and supporting RESTful APIs


• Practical experience designing and maintaining CI/CD pipelines (GitHub Actions), including automated builds, tests, static analysis, security scans, and release automation


• Experience of release processes and governance


• Experience of full-stack software development principles, architecture and conventions


• Experience of a wide range of SLDC methodologies, including Waterfall, Agile Scrum, Kanban, behavioural-driven development (BDD), and continuous integration


• Understanding of security by design (OWASP MASVS/Mobile Top 10), secure storage, certificate pinning, secrets management, encryption in transit/at rest, GDPR/privacy considerations

About us

At Post Office Ltd, we’re proud to be at the heart of communities across the UK, upheld by the dedication and service of our postmasters. We offer essential services that people rely on every day, from parcels and banking to identity and government services. While we continue to evolve with digital innovation, our commitment to personal, face-to-face service remains core to who we are.

Our journey is one of reflection, growth, and meaningful change. We’re looking for people who think differently. Those with resilience, purpose, and a deep sense of responsibility to our postmasters, partners and the communities they serve.

If you're driven by the chance to make a real impact and help shape a future, built on progress and integrity, we’d love to hear from you. For more details visit careers.postoffice.co.uk

Application Guidance

Our commitment to embracing diversity extends beyond just words. While we’ve outlined key skills above, we recognise that great candidates come from a variety of backgrounds. We value diverse perspectives and are committed to building an inclusive workplace where everyone can thrive.

As a Disability Confident Employer, we recognise the value people with disabilities can bring to our business. If you require any reasonable adjustments throughout the recruitment process or would like further details on the job description, please contact [email protected]

We’re thrilled by your interest in this opportunity and truly value every application we receive. Please note the advert may close early if we receive a high volume of applications. Unfortunately, we’re unable to provide individual feedback on all submissions.