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Ki

Senior Full Stack Engineer

London
Level
Senior

Not stated in the posting: salary, work type, visa.

Open. First seen 6 October 2026.

Apply on the company's site ā†’

About the role

Who are we?šŸ‘‹

Ki's standard text

Look at the latest headlines and you will see something Ki insures. Think space shuttles, world tours, wind farms, and even footballersā€™ legs.

Kiā€™s mission is simple. Digitally disrupt and revolutionise a 335-year-old market. Working with Google and UCL, Ki has created a platform that uses algorithms, machine learning and large language models to give insurance brokers quotes in seconds, rather than days.

Ki is proudly the biggest global algorithmic insurance carrier. It is the fastest growing syndicate in the Lloyd's of London market, and the first ever to make $100m in profit in 3 years.

Ki's standard text

Kiā€™s teams have varied backgrounds and work together in an agile, cross-functional way to build the very best experience for its customers. Ki has big ambitions but needs more excellent minds to challenge the status-quo and help it reach new horizons.

Where you come in?

Our broker platform is the core technology crucial to Ki's success ā€“ allowing us to evolve underwriting intelligently and unlock massive scale. We're a multi-disciplined team, bringing together expertise in software and data engineering, full stack development, platform operations, algorithm research, and data science. Our squads focus on delivering high-impact features ā€“ we favour a highly iterative, analytical approach. We're looking for a Senior Full-stack Engineer to join our Development team.

What you will be doing: šŸ–‹ļø

  • Build robust and scalable software for business critical, web-based applications
  • Build eye-catching, functional, efficient, and reusable web and mobile-based sites that drive these web applications
  • Design, build, test, document and maintain APIā€™s and integrations
  • Ensure quality control using industry standard techniques such as automated testing, pairing, and code review
  • Work with the Product team to understand end-user requirements and translate them into an effective technical solution
  • Document technical design and analysis work
  • Assess current system architecture and identify opportunities for growth and improvement
  • Build mock-ups or prototypes to explore and troubleshoot new initiatives
  • Work with the Product team and UX designers to review designs, implement new features, and ensure user experience is top level
  • Explore new ideas and emerging technologies, develop prototypes quickly
  • Uphold and advance the engineering teamā€™s principles and ways of working
  • Serve as a domain expert for one or more of Kiā€™s core technologies
  • Mentor and coach colleagues in both engineering and business domain subjects

Requirements

  • Experience as a mid-senior level engineer working across a modern web stack
  • Strong software engineering principles (SOLID, DRY, ER modelling)
  • Professional experience with a server-side language, ideally JVM based
  • Professional experience building web-based single page applications, using React/Typescript or an equivalent
  • Knowledge of front-end development, able to build rich user interfaces following a responsive design
  • HTML/CSS experience, including concepts like layout, specificity, cross browser compatibility, and accessibility
  • Comfortable working with cloud infrastructure, infrastructure as code, familiar with standard logging and monitoring tools used to investigate issues
  • Experience with continuous integration, or ideally, continuous delivery
  • Strong familiarity with build tools (e.g. Maven) and version control tools (e.g. Git/Github)
  • Experience working in agile teams, following Scrum or Kanban, participating in regular ceremonies including stand-ups, planning, and retrospectives
  • Experience using project management and workflow tools (e.g. Jira)
  • Previous experience of software development in the financial markets, Fintech or Insurtech is preferable
Ki's standard text

Benefits

Youā€™ll get a highly competitive remuneration and benefits package. This is kept under constant review to make sure it stays relevant. We understand the power of saying thank you and take time to acknowledge and reward extraordinary effort by teams or individuals.

What to expect during the recruitment process:

1) Initial recruiter screening call

2) Interview with hiring manager

Ki's standard text

3) Technical Interview (this may vary depending on the role)

4) Values Interview

What this role asks for

Particular to this role

CSS Ā· Git Ā· HTML Ā· Maven Ā· Test Automation

Rare in Ki's other 13 open postings.

Standard for full stack roles

React Ā· TypeScript

Common in full stack postings at any company.

In most of Ki's ads

LLM Ā· Machine Learning

Named in most of its open postings, whatever the role.

73% of this description is written for the role. The rest is Ki's standard text, folded away below.

Read against Ki's other open postings on this site.

The team: Technology HIRES STEADILY

This role is one of 14 open in Technology. 4 were posted in the last 30 days and the oldest in November: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

LLM (14 of 14), Machine Learning (14 of 14), Python (7 of 14), CI/CD (6 of 14), Jira (6 of 14), GitHub (5 of 14), Agile (4 of 14)

OTHER ROLES ON THIS TEAM

From the team and dates on Ki's own job board.

Salary context

36 other open postings titled Senior Full Stack Engineer state a salary: median USD 158,500 to USD 200,500 a year.

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