Senior Fullstack Software Engineer (JavaScript & TypeScript,) in London

We are seeking a Senior Software Engineer to join a high‑performing engineering team delivering robust, scalable, and high‑quality software solutions. In this role, you will apply your technical expertise and strategic mindset to design and build new features, resolve complex issues, address technical debt, and continually improve engineering practices. You will play a key role in shaping how the team works and ensuring we deliver meaningful value and excellent outcomes for our customers.

Responsibilities

• Building clean, maintainable features and resolving end‑to‑end issues by evaluating multiple approaches to deliver effective, high‑quality customer outcomes.
• Ensuring solutions are fit for purpose, deliver business value, meet quality standards, and align with established engineering practices.
• Contributing to the strategy and management of technical debt to maintain secure, resilient, and reliable systems.
• Defining and supporting test approaches and strategies that prioritise security, usability, accessibility, and overall customer experience.
• Reviewing code with a focus on functional and non‑functional requirements, including performance, resilience, maintainability, and security.
• Promoting continuous inspection and adaptation to improve team effectiveness, culture, and ways of working.
• Coaching and mentoring engineers to foster collaboration, mutual respect, engagement and ongoing skill development.
• Researching emerging technologies and sharing knowledge to improve solutions, while championing fair treatment of customers and stakeholders.

Qualifications

• Hands‑on experience building and supporting large production‑grade backend systems using Java/JVM technologies (Java 17+/Kotlin) and JVM Spring or Node.js‑based REST microservices.
• Strong proficiency in JavaScript and TypeScript, including working with Angular or related frameworks from either a web or backend‑leaning background.
• Deep understanding of clean code, clean architecture, and layered backend designs (e.g. three‑tier, hexagonal, onion), with the ability to align engineering choices to business goals such as scalability, quality, and maintainability.
• Solid knowledge of database composition and SQL, alongside experience designing APIs and an understanding of web, API, and distributed cloud security best practices.
• Proven ability to deliver well‑optimised, maintainable software features; analyse and resolve complex technical problems; and contribute high‑quality, actionable feedback through code reviews.
• Strong practitioner of test‑driven development and the testing pyramid, with experience working in Agile/Scrum environments using Git, Git Flow, and CI/CD pipelines.
• Excellent English communication skills, with the ability to work effectively in teams, facilitate technical discussions and workshops, and ensure alignment toward shared goals.
• Demonstrates sound decision‑making, process thinking, and mentoring capability, holds accountability for outcomes, and takes ownership of continuous learning and team capability development.

Benefits

• The opportunity to participate in our annual, performance‑related bonus plan and valuable share schemes.
• Generous pension contribution.
• Life assurance.
• Healthcare plan (permanent employees only).
• At least 25 days holiday, plus public holidays, 26 days after 2 years’ service. Option to buy and sell holiday.
• Competitive family leave.
• Participation in our electric car scheme, offering employees the option to hire a brand‑new electric car through tax‑efficient salary sacrifice (permanent employees only).
• Discounts for our own products and at a range of high street stores and online.
• We’re creating net‑zero carbon workplaces by 2030 by investing in sustainable, modern offices across the UK to bring people together and elevate the in‑person experience.

Additional Information

At L&G, we believe it’s possible to generate positive returns today while helping to build a better future for all. We care passionately about outcomes rather than attendance and are therefore open to discussing all kinds of flexible working options including part‑time, term‑time and job shares. Although some roles have limited flexibility due to customer demand, we accommodate requests when we can. It doesn’t matter if you don’t meet every single criterion in this advert. Instead, think about what you excel at and what else you can bring in terms of strengths, potential and connection to our purpose.