Senior Full-Stack Software Engineer, Kooth
£63.8-75k
+ Annual company share options
Effective personalised digital mental health care platform
Be an early applicant
Effective personalised digital mental health care platform
201-500 employees
Be an early applicant
£63.8-75k
+ Annual company share options
201-500 employees
Company mission
Kooth's mission is to create easy to access online mental health services that work alongside you to provide compassionate and effective support.
Role
Who you are
- 3+ years of hands-on experience in full-stack software development in a product-oriented environment
- Proficient in TypeScript, Node.js, and either React or React Native (or able to ramp up quickly with a solid engineering foundation), as well as database technologies such as PostgreSQL and experience in delivering a web or native mobile application
- Deep enthusiasm for full-stack software engineering with strong problem-solving capabilities
- Solid understanding of modern system architecture and the ability to contribute to its evolution
- Commitment to quality, with experience shipping maintainable, scalable, and well-tested code
- Ownership mentality with a focus on pragmatic delivery and continuous improvement
- Skilled in agile practices, data-informed decision-making, and building reliability.
- Excellent communication and collaboration skills, including mentoring and inspiring peers
- A team player who values collective success and nurtures a positive, inclusive engineering culture
- A proactive approach to solving technical challenges and influencing engineering direction
- Focus on pragmatic delivery, able to take ownership appropriately
- Strong communication skills, builds great colleague relationships across disciplines
Desirable
- Deep experience with React or React Native in production environments
- Experience operating production systems and improving them through observability, testing, and thoughtful design
- A track record of delivering product improvements that tie into measurable business and user outcomes
- Familiarity with cross-platform design, mobile/web accessibility, and monorepos
- Expertise in trunk-based development, test automation and infrastructure as code
- Experience with scalable system design and architecture patterns
- Exposure to cloud-native technologies, particularly GCP or AWS with Kubernetes
- Leadership in cross-functional initiatives or technical working groups
What the job involves
- Reports to: Engineering Manager
- Senior Engineers are trusted and impactful contributors who help set technical direction and drive execution for their squad and the wider department
- They demonstrate ownership across their squad’s work and regularly support others
- Their contributions significantly influence Kooth’s product and business objectives
- As a Senior Engineer, you’ll help shape how we build reliable, scalable systems that guide young people to the right help
- This is a hands-on role with real-world impact—helping create digital products that are meaningful, empathetic, and technically sound
- Designing and building RESTful Node APIs, React frontends, and/or React Native mobile apps—contributing to system design and architectural evolution
- Leading by example in trunk-based development, automated testing, CI/CD, and infrastructure-as-code principles
- Taking ownership of performance, resilience, observability, maintainability, security, and accessibility
- Building and operating a suite of Node.js backend services, React-based web apps, and React Native mobile experiences that form the backbone of our mental health platform
- Taking end-to-end ownership of features, from idea through to production, with a strong sense of accountability and user impact
- Improving the systems you work on by applying thoughtful, pragmatic solutions to technical challenges
- Actively collaborating across disciplines and mentoring colleagues through pairing, code reviews, and knowledge-sharing
- Driving a shared understanding of user needs, commercial priorities, and how technical decisions influence business outcomes
- Contributing to and occasionally leading technical discussions and decisions
- Staying current with industry best practices in engineering, CI/CD, and architecture
- Supporting onboarding and professional growth of junior engineers and new hires
- Participating in the out-of-hours on-call rota and improving system reliability and incident response processes
- Continuously improving the systems you work on, applying a thoughtful and pragmatic approach to technical tradeoffs
Application process
- End Date: 9/6/25
Our take
Kooth offers free at the point of access mental health care to more than 5.4 million people via NHS commissioners, corporates, social workers, GPs and schools across the UK. It provides a mix of community-created content, forum sessions with other community members, and one-to-one counselling via online chat. All users sign up anonymously for the free-of-charge service and there's no digital tracking of session IP addresses. The aim is to provide a safe space where each person can get the support they need.
As a pioneer in online counselling, Kooth brings together emerging technologies with innovation in clinical practice and evaluation to create new models of care in mental health. The 2020-hired CEO Tim Barker’s data science experience will prove very useful in exploring whether there are patterns in its historic dataset that can be helpful to future users.
Kooth’s 2020 IPO came at a time when London listings were sparse. A testament to the important contribution its services can make at a time when businesses are becoming more conscious of the need to foster well-being in their employees and in the wider world. This is further exemplified by the 33% soar in share prices after a contract was announced to serve 13 to 25-year-olds in California.
Freddie
Company Specialist at Welcome to the Jungle
Insights
10% employee growth in 12 months
Company
Company benefits
- 28 days (plus Public Holidays)
- Yearly professional training programmes structured around you
- Pension contributions
- Remote Working
- Healthshield Care plan
- EAP programme, 24/7 Telephone Mental Health & GP
- Annual company share option awards
- Life Assurance (up to four times the amount of your annual salary)
- Cycle to Work Scheme
- Incapacity Income Protection
Company HQ
Paddington, London, UK
Leadership
Tim Barker
(CEO, not founder)Worked previously as the CEO at DataSift and in Platform and Go-to-Market strategy at Meltwater after the company's acquisition of DataSift. Became Kooth's CEO in 2020.
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