Senior Software Engineer

4,000 professionals, 0 days wasted, 1 incredible purpose. Together we will beat cancer.

Senior Software Engineer

£58,000 - £63,000 per annum

Directorate: Chief Operating Office

Contract: Permanent

Hours: Full time - 35 hours per week

Location: Stratford, London. Office-based with high flexibility (1-2 days per week in the office)

Visa sponsorship: You must be eligible to work in the UK to apply for this vacancy. Cancer Research UK is not able to offer visa sponsorship.

Closing date: 4 October 2026 23:55

Interview date: To take place upon application, so please do not delay in applying

Help power the technology behind life-saving research

At Cancer Research UK, our vision is to bring about a world where everybody lives longer, better lives, free from the fear of cancer. We are looking for a talented Senior Full Stack Software Engineer to take ownership of a diverse portfolio of business-critical applications, services and integrations that support teams across the charity.

This is an exciting opportunity to work across the full technology stack, developing modern React and Next.js applications, Node.js services, APIs and cloud-based AWS solutions. You will play a key role in maintaining and improving systems that enable colleagues across the organisation to deliver their best work while helping shape our engineering standards and technical direction.

What you will be doing

· Developing and supporting full stack solutions using TypeScript, React, Next.js, Node.js and AWS.

· Designing and maintaining APIs, backend services and cloud-based integrations.

· Taking ownership of applications and services within our Corporate Operations portfolio.

· Supporting and modernising existing and legacy systems.

· Improving reliability, security, performance and maintainability.

· Contributing to engineering best practice and continuous improvement.

What we are looking for

· Strong commercial experience with TypeScript, React and Node.js.

· Experience building APIs and working with AWS or similar cloud technologies.

· Knowledge of automated testing, CI/CD and DevOps practices.

· Excellent problem-solving and communication skills.

· Ability to work collaboratively with technical and non-technical stakeholders.

What you will gain

· Flexible hybrid working.

· 25 days annual leave plus bank holidays and a CRUK day.

· Option to buy up to 5 additional days leave.

· Up to 10% employer pension contribution.

· Life insurance and excellent learning opportunities.

Together, we will beat cancer.

Recruitment process: Two competency-based interview with task

Interview date: To take place upon application, so please do not delay in applying

Tech Stack: TypeScript, Drupal, PhP, Contentful

Additional Information

Cancer Research UK’s Technology team is proud to be part of the Tech Talent Charter (TTC) for our efforts in driving equality, diversity, and inclusion in the workplace. Our vision is a digital world accessible to all, and we have always sought to draw from a diverse pool of talent and maintain an inclusive working environment.

For more information on this career opportunity please visit our website or contact us at [email protected].

For more updates on our work and careers, follow us on: Linked In, Facebook, Instagram, Twitter and YouTube.

Our vision is to create a charity where everyone feels like they belong, benefits from and participates in, the work we do. We actively encourage applications from people of all backgrounds and cultures, in particular those from ethnic minority backgrounds who are currently under-represented.

We want to see every candidate performing at their best throughout the job application process, interview process and whilst at work. We therefore ask you to inform us of any concerns you have or any adjustments you might need to enable this to happen. Please contact [email protected] or 020 3469 8400 as soon as possible.

Unfortunately, we are unable to recruit anyone below the age of 18, so that we can protect young people from health & safety and safeguarding risks.