Senior Developer

Post Office Ltd; Greater London; Hybrid; GBP 80,000 - 110,000; Full time

Benefits offered by this job

Annual leave

Bonus potential

Car allowance

Pension scheme

Digital GP services

Life assurance

Training courses

Employee discounts

Job summary

Post Office Ltd in London is seeking a Senior Developer to build, maintain and support internal applications within the Digital & Branch Engineering function. You will deliver new applications and services as trading platforms modernisation progresses, while collaborating with stakeholders to promote best practices and drive innovation.

You will work in a hybrid environment, reporting to the Lead Developer, and contribute to design, testing, release and ongoing support processes with a focus on

Qualifications

• Experience with full-stack software development principles and architectures.
• Experience building cloud-native microservices and distributed systems (AWS preferred).
• Strong knowledge of data structures and databases (relational and non-relational).
• Good understanding of test-driven development and testing conventions.

Responsibilities

• Build, maintain and support internal applications as part of the Digital & Branch Engineering function.
• Collaborate with stakeholders to drive Agile delivery.
• Write clean, maintainable code that is well-tested and observable.
• Ensure performance, quality and responsiveness of applications across the lifecycle.
• Mentor junior developers and contribute to technical documentation.

Skills

Full-stack development

Cloud-native microservices

RESTful APIs

CI/CD pipelines

Agile delivery

Code reviews

Mentoring juniors

Education

BSc Computer Science

Tools

AWS

Jira

Git

Job description

Career Opportunities: Senior Developer (19144)

Requisition ID19144-Posted10/29/2026-Technology (50000000)-IT Development (60000409)-Wood Street (14402)-Information Technology-Permanent-Full Time-City of London – and Greater London

Salary : Competitive plus comprehensive benefits package
Grade: 3A
Reporting Line: Lead Developer
Contract Type: Permanent
Working pattern: Hybrid
Location: London
Closing Date : 12th November 2026

What to expect

Senior developers will be responsible for building, maintaining and supporting our internal applications. As a team member in the nascent Digital & Branch Engineering function this role will help deliver new applications and service as we modernise our trading platforms making them vastly better for Postmasters and Customers.

You will be working collaboratively with key stakeholders across the business and embedding best practices aligned to our strategic goal.

This role offers youa unique opportunity to make a tangible impact, drive innovation, and contribute to shaping the future of our organisation and the communities we serve.

How our people behave is as important to Post Office, as what is delivered.

What we can do for you

Our business is changing and we understand that attracting the right talent is pivotal in driving the positive change needed, to help us achieve our ambitious goals. Beyond a competitive salary, we offer a comprehensive benefits package that includes:

• 27.5 days annual leave (rising to 30 after 2 years), plus bank holidays
• Up to 18% on target bonus opportunity
• Annual car allowance
• Generous pension scheme with minimum 10% employer contribution
• Access to 24/7 digital GP services and our Employee Assistance Programme
• 6 x Life assurance and income protection after 12 months service
• Over 400 online courses, mentoring, apprenticeships, and development programmes
• Access to our benefits platform for exclusive discounts & savings

To be successful in this role you will be well versed in:

• Produce and contribute to the development of fully functional, cloud-native applications and microservices.
• Collaborate with the wider development team to support Agile delivery processes.
• Produce and maintain clean, high-quality code that is testable, maintainable, and observable.
• Ensure the best possible performance, quality, and responsiveness of applications.
• Support the full application lifecycle, from concept and design through to testing, release, and ongoing support.
• Accelerate delivery by implementing and leveraging automation, CI/CD pipelines, and development tools.
• Continuously improve and refactor the codebase to increase efficiency, maintainability, and performance.
• Implement and promote development best practices, including code reviews, testing frameworks, and coding standards.
• Support, coach, and mentor junior developers.
• Contribute to and maintain accurate technical documentation.
• Liaise with product teams, project stakeholders, and developers to ensure successful delivery and alignment of expectations.
• Identify, manage, and resolve risks, issues, defects, and technical challenges, while deputising for the Lead Developer when required.

Technical Requirements

• Experience of full-stack software development principles, architecture and conventions
• Experience of cloud-native micro-services and distributed systems (ideally AWS)
• Strong understanding of data structures and architectures, using relational and/or non-relational database approaches
• A strong understanding test-driven development and testing conventions
• Experience of developing RESTful APIs
• Understanding of IT security/risk
• Experience with workflow and code versioning tools, such as Jira and Git
• BSc degree in Computer Science, relevant field or equivalent

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 [e-mail]

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 [e-mail]

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.