Senior Fullstack Engineer (React & Java)

Board Intelligence; City Of London; On-site; GBP 60,000 - 80,000; Full time

Job summary

A technology and advisory firm is seeking a Senior Full Stack Developer to build secure, scalable products that enhance board-level decision-making. The role involves working with React and Java, mentoring other developers, and delivering AI-powered features. Experience with Java, Spring Boot, and React is required. Join a diverse and friendly team with a focus on continuous improvement and technical quality.

Benefits

Private Pension Scheme

BUPA Health and Dental insurance

Group life insurance

26 holiday days plus Bank Holidays

Cycle to work scheme

Employee Assistance Program

Eyecare and Flu Jab vouchers

Enhanced Parental Leave

Qualifications

• Strong hands-on experience with Java and Spring Boot.
• Deep understanding of API design, integration and security.
• High proficiency with React and modern JavaScript or TypeScript.

Responsibilities

• Deliver key product features using React and Java.
• Lead engineering work on AI integration projects.
• Develop RESTful APIs and scalable backend services.

Skills

Java

Spring Boot

React

API design

PostgreSQL or MySQL

JavaScript or TypeScript

Unit testing

Tools

Jest

React Testing Library

JUnit

Docker

Kubernetes

Job description

Board Intelligence is a technology and advisory firm that supercharges boards with the science of board effectiveness. We build better businesses and benefit society.

Through a suite of AI-powered software tools, evaluation frameworks, and advisory services that distil twenty years of boardroom experience, we improve the efficiency of board processes and the effectiveness of boards.

We work with over 80,000 leaders and 3,000 organisations across the world, with clients across the Fortune 500, FTSE 100, and OMX 30. In 2024 we received substantial backing from K1 Investment Management – the leading B2B Enterprise SaaS investors. We are at the beginning of significant growth, and we’re looking for superb talent to join us on this journey.

As we grow, we’re fiercely protective of our culture and values. Many of us, including our founders, have families and other priorities, so we know the value of a supportive company.

The team is diverse and friendly. We value fun: most days you’ll find a social event or learning opportunity to get involved with, including company socials, away days, and philanthropic activities.

Our Mission

We unleash the potential of organisations through the science of board effectiveness, building better businesses and benefiting society.

The Role

We are hiring a Senior Full Stack Developer to help us build secure, scalable and forward-thinking products that make board-level decision making smarter, faster and more effective.

This is a hands‑on role where you will work across our React frontend and Java backend to deliver high quality projects at pace. You will guide the technical direction of our products, mentor other developers and help shape the systems that power our platform. You will be at the centre of delivering AI‑powered features, internal tools and critical services that require reliability and performance.

We are looking for someone who leads through craft, cares deeply about clean architecture, and enjoys lifting the capability of those around them. You will be supported by a team that values clear thinking, knowledge sharing and continuous improvement.

Responsibilities

Big things

• Deliver key product features using React and Java with a focus on performance, security and scale
• Lead engineering work on projects ranging from AI integration using Vertex AI and the Agent Development Kit to critical internal systems
• Contribute to architectural decisions and help shape how we build and maintain scalable, maintainable services
• Drive delivery standards and technical quality across the team
• Act as a mentor to other developers, supporting their learning and growth

And the smaller but still important things

• Develop RESTful APIs and scalable backend services using Spring Boot
• Implement and maintain responsive, accessible user interfaces
• Optimise SQL queries and database structures
• Write and maintain unit and integration tests
• Contribute to our documentation, standards and development processes

Required Experience

• Strong hands‑on experience with Java, Spring Boot and related frameworks
• Deep understanding of API design, integration and security
• Experience working with relational databases such as PostgreSQL or MySQL
• High level of proficiency with React and modern JavaScript or TypeScript
• Knowledge of testing frameworks like Jest, React Testing Library and JUnit
• Experience designing, delivering and maintaining complex software systems
• Comfort translating specifications into actionable deliverables
• Track record of mentoring or coaching developers
• Ability to balance speed with technical rigour and code quality

Nice to Have

• Familiarity with distributed systems or microservice architecture
• Experience working with NoSQL databases
• Exposure to tools such as Kafka, Redis or PubSub
• Knowledge of state management libraries like Zustand or Redux
• Comfort with Docker, Kubernetes and cloud infrastructure
• Experience in DevOps and CI/CD pipelines
• Interest or experience in AI or data‑heavy feature development
• Working knowledge of Python

Benefits

• Private Pension Scheme
• BUPA Health and Dental insurance (including access to the My BUPA app)
• Group life insurance: 4x annual salary
• 26 holiday days per calendar year in addition to Bank Holidays
• Cycle to work scheme
• Employee Assistance Program
• Eyecare and Flu Jab vouchers
• Enhanced Parental Leave