Software Developer/ Senior Software Developer - COSMIC

Salary in the region of £27,388 - £49,922 - dependent on skills and experience (grade 3 or 2), plus excellent benefits

Permanent/ Open Contract

We are looking for a talented and motivated software developer to join COSMIC, the Catalogue Of Somatic Mutations In Cancer (, a major international resource in cancer research, based at the Wellcome Sanger Institute (

The opportunity

We are beginning a large-scale redevelopment of our infrastructure and services, which presents a unique opportunity for a talented back-end/full-stack developer to help shape the way we build the new COSMIC platform. Working with the COSMIC web team and our UX lead, you will be critical to the design and implementation of the infrastructure that will underpin COSMIC’s new web infrastructure. The tools you build will help ensure COSMIC remains a world-leading resource for scientists researching new approaches to understanding and treating cancer.

About you

We’re looking for a Python/Django developer with practical experience of building modern web applications. We’re particularly keen to hear from you if you are also interested in contributing to the development of new front-end applications using React.

The technology stack on which our new web applications will be built includes:

While some of these technologies may be outside of your core expertise, we’re looking for enthusiasm and interest rather than years of experience working with them, and we’re happy to provide training to get you up to speed.


A revolution is underway in health informatics, with genetics increasingly important in understanding human health and disease. COSMIC, a database of genetic mutations in cancer, is used by over 3000 scientists every day across the informatics, diagnostic and pharmaceutical industries.

We are open to a range of flexible working options including part- or full-time employment, as well as flexible hours. This position is available at grade 2 or 3, dependent on relevant experience. This will be discussed during the interview process.

Tags: python, django, graphql, javascript

Essential Skills
In-depth experience/working knowledge of developing secure and scalable database-driven web applications and APIs
Expert/good knowledge of Python3, especially Django
Good team working and communication skills
A passion for writing clear, concise, and well-tested code

Ideal Skills
Interest in front-end development using modern JavaScript frameworks such as ReactJS
Interest in using CI/CD and TDD
Experience/knowledge of working in an agile development environment
Interest in applying UX methodologies
Familiarity with version control software, preferably git Experience/awareness of relational databases or document stores such as MySQL, Oracle and MongoDB
Understanding of building services with REST/GraphQL

Application Instructions: 

Please apply directly via our website, please find the URL;-

Please include a covering letter and CV with your application.

Application Closing Date: 
31 March