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Lead Full Stack Engineer

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Onsite

Lead Full Stack Engineer

Project Arnaud

Lead Full Stack Engineer

Skills

Mobile DevelopmentReactNodeReact NativeCybersecurityAI

2 months ago

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Important information


Salary:

£80,000 – £120,000 / year

Location:

London, UK

Work mode:

Onsite

Published on:

17 August 2026

What they need


Who you are

  • 7+ years experience as a full-stack engineer with experience of some or all of the technologies in our platform. React experience is essential, and React Native is strongly preferred
  • Experience of mobile app development
  • Knowledge of building and running banking-grade cloud-based solutions
  • Experience building with and leveraging AI technology to enhance product features and development workflows
  • Attention to detail and empathy to user needs and experience
  • Excellent communication skills
  • Flexible and focused on solutions
  • Organised and self-sufficient
  • Background and/or enthusiasm for the ways we work:
  • Test-Driven Development - we use jest and react-testing-library across our codebase
  • Build automation, continuous integration and continuous deployment to production systems
  • Agile/iterative development processes
  • Shared code ownership & cross-functional teams
  • Collaborative design and development
  • Pair programming
  • Experience working on server-side applications with Node
  • Experience in startup environments
  • Experience with 0-1 development
  • Experience in Financial Services
  • Experience with knowledge graphs, ontologies and large language models, in products where novelty mattered as much as correctness and repeatability

What the job involves

  • At Kinsworth, we aren’t just building software; we’re building a product customers love and a successful business
  • To achieve this, we operate at pace, we're big believers in autonomous teams and iterative development
  • We're crazy about continuous improvement and knowledge sharing, and we want people who share our enthusiasm
  • We strive to always build the right thing and build the thing right, so we place great emphasis on understanding exactly what our customers need and delivering quality products that exceed their expectations
  • We think that high-performing teams operate best through a model of build-it and run-it that comes from a deep curiosity about how our products work and how our customers use them
  • We use this foundation to build comprehensive product knowledge and industry expertise, but we're not dogmatic about it
  • We operate in build squads that operate independently but are aligned to the same goals and ways of working
  • We recognise that different drives guide our roadmaps from customer needs to commercial strategy to regulatory change, and managing those dependencies is best achieved through aligned team decisions
  • We make customer success everyone's business — what we are going to do and how we do it are team decisions
  • We strongly believe that you grow expertise through hands-on experience, rather than just theoretical knowledge, so our approach to product leadership is designed to give you deep exposure to our products, our customers, and the fintech industry really fast
  • And really often
  • We build our product and tech function with focus on:
  • Understanding Kinsworth, the industry needs and customer use cases
  • Quality is at the heart of everything we do and not just a gate in a process
  • Leading product roadmaps, planning and establishing best practices
  • Developing expertise in the financial services industry and regulatory environments
  • Building and maintaining exceptional customer relationships through team excellence
  • Zero-to-one function building — creating product delivery frameworks, engineering performance systems, and product delivery processes from the ground up
  • Building and leveraging AI technology to enhance product features and development workflows
  • Leading the technical design and development of the consumer experience for Kinsworth
  • Ensuring high-performance, scalable, available, fault-tolerant systems are built and maintained
  • Directly managing, coaching and mentoring the team of Engineers, developing talent and fostering a culture of technical ownership, collaboration and quality
  • Defining and executing the technical strategy and architecture decisions
  • Partnering with Product Managers, Designers and leadership to refine and execute the product domain’s roadmap
  • Contributing as a core member of the technology leadership team covering information security and governance to establish standards, protocols and mechanisms for secure, reliable solutions
  • Driving the use of AI technology to enhance our product features and development workflows, and building with AI capabilities
  • In a “you build it, you run it” model, ensuring that continual delivery is executed, technical risks and dependencies are managed and ensure the team adopts DevOps practices

The application process

  • Step 1: Meet the recruiter
  • If you meet the grade we will have a short discussion with you to understand you more and get to know us and the role
  • Step 2: First (technical) interview
  • The team you could be working with will interview you. Some roles have a technical part of the interview process
  • Step 3: Second (final) interview
  • A second stage interview will go deeper about you and how you align with us as a company
  • Step 4: Decision
  • We will make a decision and let you know why. We will never ghost you or give you generic feedback

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