Lead Full Stack Kotlin Developer

Extensive experience in Kotlin and the full development lifecycle delivering user-centred digital solutions (with a strong foundation in Java/JVM ecosystem).

Proven track record of leading a delivery team to deliver high-quality, robust, and scalable solutions.

Expertise in building back-end services using Kotlin with Spring Boot and the wider Spring Framework (Spring MVC, Spring Security, REST APIs), leveraging Kotlin idioms and coroutines where applicable.

Experience in Microservices design and architecture, including RESTful API services and Kotlin-based microservice patterns.

Expertise in public cloud (AWS, Azure, or GCP) and DevOps practices, including containerisation (Docker, Kubernetes).

In-depth knowledge of Infrastructure as Code tools such as CloudFormation or Terraform.

Proficient in using CI/CD tools such as Jenkins or Azure DevOps.

Experience with front-end technologies (e.g., Angular, React, and TypeScript).

Previous experience working on GOV/NHS projects or in a consultancy environment.

Experience migrating legacy Java codebases to idiomatic Kotlin.

Experience with asynchronous messaging systems (e.g., Kafka) and Kotlin Coroutines/Flow for reactive programming.

Familiarity with Kotlin-native frameworks (e.g., Ktor) or functional programming libraries (e.g., Arrow).

Alongside working with some of the most talented people out there and on-top of a competitive salary, which we’re transparent about from the outset, you can also expect a range of benefits:

Contributory Pension Scheme (Hippo 6% & Employee 2%)

25 Days Holiday plus UK Public Holidays

Perkbox access for a wide range of discounts

Critical illness cover

Life assurance and death in service cover

Volunteer days

Cycle-to-work scheme for the avid cyclists

Salary sacrifice electric vehicles scheme

Season ticket loans

Financial and general wellbeing sessions

Flexible benefits scheme with options of:

Private health cover

Private dental cover

Additional company pension contributions

Additional holidays (up to an extra 2 days)

Wellbeing contribution

Charity contributions

Tree planting

At Hippo, we’re dedicated to creating a diverse, equitable and inclusive workplace that works for everyone. We understand that having a diverse team unlocks our capacity for innovation, creativity and problem solving. Only by building a community of diverse perspectives, cultures and socio-economic backgrounds can we create an environment where all can contribute and thrive.

We actively encourage applications from underrepresented groups including women, ethnic minorities, LGBTQ+, neurodivergent and people with disabilities. We are committed to providing an inclusive and accessible recruitment process that reflects our workplace culture. We are a registered Disability Confident Employer, Mindful Employer, Endometriosis Friendly Employer and a member of the Armed Forces Covenant. Hippo continually strives to remove barriers, provide accommodations and offer reasonable adjustments to ensure equity throughout our practices.

Hi, we’re Hippo

At Hippo, we design with empathy and build for impact. We do this by combining data-informed evidence, human-centred design and software engineering. We're a digital services partner who is genuinely invested in helping our clients thrive as modern organisations. Our delivery methodology is truly agile, from concept to reality, supporting innovation and continuous improvement to achieve your desired outcomes.

We firmly believe that technology should serve humanity, not the other way around. We take a human-centred approach to everything we do because we understand that complex problems require a service design approach. This means understanding how users behave and ensuring our solutions work for them in the real world.

Our combination of data, design, and engineering delivers bespoke digital services that make a positive and meaningful impact on organisations and society.

Have a look through our Website at Our Story & Purpose, Our Culture & Values, Case Studies and Our Solutions & Services to find out some more!