Senior Full-Stack Engineer: Build Scalable Web Apps

Ki; Greater London; On-site; GBP 65,000 - 90,000; Full time

Job summary

Ki is seeking a Full-stack Engineer to build robust, scalable web-based software and enhance the Ki platform. You will design, build, test, and maintain APIs and integrations, while collaborating with Product and UX to deliver features with top-tier user experience.

You will work across a modern web stack, applying SOLID and DRY principles, and participating in Agile ceremonies. The role emphasizes fast prototyping, learning new technologies, and maintaining quality through automated testing and

Qualifications

• Experience with a modern web stack
• Knowledge of SOLID, DRY, ER modelling
• Server-side language experience, ideally JVM based
• Experience building SPA using React/TypeScript
• Front-end development and responsive design
• Cloud infrastructure familiarity and IaC
• Experience with CI/CD
• Build tools and version control
• Experience in agile teams and ceremonies
• Experience with Jira or similar tools
• Strong interpersonal and planning skills
• Ability to learn new technologies quickly

Responsibilities

• Build robust, scalable software for web-based applications
• Develop reusable web and mobile interfaces for Ki platform
• Design, build, test, and maintain APIs and integrations
• Ensure quality with automated testing, pairing, and reviews
• Collaborate with Product to translate user needs into solutions
• Document technical designs and analyses
• Assess architecture and identify growth opportunities
• Create mock-ups or prototypes for new initiatives
• Work with Product and UX to implement features and optimize UX
• Explore new technologies and rapid prototyping
• Uphold engineering principles and practices

Skills

Full‑stack development

React/TypeScript

JVM

APIs and integrations

Cloud infrastructure

CI/CD

Build tools (Maven)

Git/GitHub

Agile/Scrum/Kanban

Testing and code review

Tools

Maven

Git

Job description

Ki is seeking a Full-stack Engineer to build robust, scalable web-based software and enhance the Ki platform. You will design, build, test, and maintain APIs and integrations, while collaborating with Product and UX to deliver features with top-tier user experience.

You will work across a modern web stack, applying SOLID and DRY principles, and participating in Agile ceremonies. The role emphasizes fast prototyping, learning new technologies, and maintaining quality through automated testing and