Java jobs in United Kingdom

We are a digitally transformed, tech-enabled security services company. We're on the lookout for a dynamic individual to join our team as our Senior Mobile Engineer to help shape the direction of our React Native app. This is an opportunity to take the lead on mobile in a company that's building fast, solving real problems, and wants to experiment with modern approaches such as computer vision, behaviour modelling, and gamification. You’ll make critical technical decisions, steer the architecture, raise the bar for quality across the board and have the opportunity to grow the team.

You’ll work closely with our Lead Engineer and product team to bring ideas to life and move quickly on the things that matter. There’s plenty of room to make an impact, and your voice will help shape how we build and scale.

The tools you’ll work on power security teams in high-pressure environments, ranging from critical national infrastructure to medieval castles to some of the UK’s largest facilities providers. It's a chance to build products that are not only beautifully crafted but genuinely useful in the real world.

• Excellent salary of up to £80,000 per annum (DOE).
• Fulltime, permanent, and flexible working basis (ability to work from home but must have the flexibility to travel into our London Farringdon HQ once a month or as/when required).
• We offer internal training and development opportunities, all done in an excellent working environment.
• Benefit from personalised career development plans through our My TKC Journey initiative.
• Auto-enrolment into our salary sacrifice pension scheme, 24/7 confidential Employee Assistance Program, and a voluntary health cash scheme starting at £1 per week.
• Regular social events, monthly team days, and an exercise club to keep you connected and active.
• Fast paced and exciting role, no two days are ever the same.

• Our mobile app, crafted in Typescript/React Native and powered by TanStack Query for state management, ensures a seamless and engaging user experience.
• For our thrilling new product launch, we've developed a cutting-edge risk consultancy dashboard with NextJS, Zustand and TanStack Query.
• We're committed to maintaining a high code coverage for our applications, providing confidence that everything we release undergoes rigorous testing and verification.
• We have a strong dedication to continuous improvement, constantly enhancing our development tools, methods, and technology stack. Whether it's optimising our integration pipeline or refining our release processes, we're all about boosting efficiency.
• Our future is filled with exciting projects on the horizon (and that's where you come in!). We're always looking for talented individuals to join our team and be a part of our upcoming ventures.

We're a company that values the close-knit camaraderie of a small team. Here, your ideas won't just be heard; they'll be welcomed and swiftly integrated into any process you wish to contribute to. We wholeheartedly embrace the belief that every voice matters, and you'll witness your suggestions come to life with remarkable speed.

• Languages: TypeScript, JavaScript
• Frameworks: React Native, Expo, React, NextJS, Zustand
• State: Zustand, TanStack Query
• CI: GitHub Actions
• Infra: AWS (CloudFront, S3, WAF, EC2, Lambda), Terraform, Docker
• Backend: Java, Python, Node.js, PostgreSQL

• 4+ years’ experience building robust, maintainable mobile applications in production.
• Proficient with TypeScript, React Native, Zustand, Tailwind/Nativewind/SCSS.
• Experienced in writing comprehensive automated tests.
• Attentive to app performance optimisation and mobile security best practices.
• Comfortable working across the stack (RESTful APIs, PostgreSQL, basic cloud infrastructure knowledge).
• Advocate for clean code, UI/UX best practices, and scalable architecture.
• Skilled at debugging complex issues and optimising for production stability.

• Leads by example, mentoring teammates and driving technical excellence.
• Embraces agile ways of working to deliver value continuously and efficiently.
• Able to align technical work with product strategy and business needs
• Creative thinker with an eye for detail and continuous improvement.
• Proactive communicator who cultivates collaboration across teams and stakeholders.

Equity, Diversity and Inclusion matter to us. We are keen to hear from candidates from a broad range of backgrounds and experiences and are excited about learning from you, as much as we know you can learn from us.