Lead Software Engineer Java

Castleisland; Greater London; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A growing financial technology company in Greater London seeks a Lead Backend Engineer to design and maintain scalable backend systems. The ideal candidate will have over 7 years of backend development experience, particularly in Java, and a passion for building impactful products. You will work primarily in the London office, collaborate with a talented team, and focus on improving existing systems and APIs. Attractive benefits include stock options and competitive salaries.

Benefits

Competitive salary

Sign-on stock options

Discretionary performance bonus

Paid annual leave

Access to latest technology

Strong team support

Qualifications

• Minimum 7+ years of experience in backend development.
• Fluency in English, both verbal and written.
• Experience building complex products for a large user base.

Responsibilities

• Design, develop, and maintain robust backend systems.
• Build REST APIs and engineer microservices.
• Focus on clean code and employ TDD and DDD.

Skills

Java

Backend development

Communication skills (English)

Problem-solving

Tools

Postgres

Spring Boot

Job description

Who we are

Our vision is simple: a global financial system, without hidden fees or unfair FX rates. With control in the hands of the users instead of the hands of banks. With fund management capabilities to grow your savings for decades and build generational wealth.

What we're looking for

Do you want to build robust systems that empower financial freedom? As a Lead Backend Engineer, you’ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You’ll collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money. If you’re excited to solve complex challenges and make a meaningful impact in a fast-growing company, we’d love to hear from you!

What you'll be doing

• The work will focus on greenfield development and improvement of existing systems
• Projects will include building REST APIs, engineering microservices and evolving a number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity)
• Our technology stack is based predominantly on Java 25 on the backend with Postgres database
• We rely on Spring Boot for quick and quality delivery
• We have a pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery

What you'll need

• Minimum 7+ years of experience in Backend development, with fluency in Java
• Quick learner with an ambitious and results driven personality, with excellent communication skills (english fluency, verbal and written)
• Track record of building complex products that millions of people use in hyper-growth startups
• Willingness to work from the London office at least 2 days per week

Benefits

• Competitive salary
• Sign-on stock options bonus, so you become part of the success of the company
• Discretionary performance bonus (stock options)
• Paid annual leave
• Own the development process that will face on the customer's impact
• Latest technology to work with
• Strong team that will help you improve your skills