Lead Full Stack Software Engineer

What we’re all about. 

Do you ever have the urge to do things better than the last time? We do. And it’s this urge that drives us every day. Our environment of discovery and innovation means we’re able to create deep and valuable relationships with our clients to create real change for them and their industries. It’s what got us here – and it’s what will make our future. At Quantexa, you’ll experience autonomy and support in equal measures allowing you to form a career that matches your ambitions. 41% of our colleagues come from an ethnic or religious minority background. We speak over 20 languages across our 47 nationalities, creating a sense of belonging for all.

We're heading in one direction, the future. We’d love you to join us.

What will you be doing?

You’ll be joining the Research and Development department where you will be working on our core Contextual Decision Intelligence offering: The Quantexa Platform. The Quantexa Platform helps our Customers solve business problems in areas such as fraud, financial crime, data management and many more. Our products process, analyse and display huge volumes of data with the ultimate aim of detecting anomalous and suspicious activity.

The R&D department consists of nearly 200 people split into agile teams of Engineers, DevOps, Data Engineers and Scientists, Designers, QA and others each focusing on specific projects and areas of the Platform.

Our back end services are primarily written in Scala and deployed as microservices. We are huge fans of functional and strongly typed programming, making use of libraries such as Cats and Shapeless. We use Pekko and Cats-Effect to help build scalable, highly performant, distributed systems. We utilise techniques such as event sourcing and CQRS in our persistence layer to ensure our datastores are scalable and flexible.

The front end has been developed using modern front-end tools and frameworks such as TypeScript, Angular and ngrx and has been designed from the ground up to be highly extensible and allow for customisation to meet varying requirements.

Requirements

We are looking for candidates who:

• Take pride in designing, building, and delivering high quality well engineered solutions to complex problems.
• Ideally you will have experience as a Fullstack Engineer using Scala and Angular 2+, however, we are open to experience as a Fullstack Engineer using Java and other modern front-end frameworks.
• Have experience with the full engineering life cycle, from design and implementation through to testing and deployment.
• Want to build a rich, data driven application.
• Take a big picture approach to solving problems, taking care to ensure that the solution works well within the wider system.
• Love working with the latest technology.
• Passion and drive to grow within one of the UK’s fastest-growing Start-ups.

Experience in the following would be beneficial:

• Working across the entire software stack from the server‐side and batch processing components to the front‐end web development.
• Working with Java and the JVM.
• AI Development tools such as Claude Code or Cursor
• Has a keen eye for detail with regards to design and UX.

• Knowledge working with any of the following technologies or libraries: Akka, Monix, Cats. Shapeless, Spring Boot, Elasticsearch, Gradle, Apache Spark, Hadoop, Docker, Kubernetes.

You will be joining Quantexa's R&D team which currently consists of over 40 engineers, working across the front and back end of the application.

Benefits

Why join Quantexa?

Our perks and quirks.

What makes you Q will help you to realize your full potential, flourish and enjoy what you do, while being recognized and rewarded with our broad range of benefits.

• Competitive salary
• Company bonus 
• 23 days annual leave, plus national holidays + your birthday off!
• Pension scheme with a company contribution of 5% (when you contribute 2%)
• Private Healthcare with DKV
• Life Insurance
• Work from Home Allowance
• Meal Vouchers
• Regularly bench-marked salary rates 
• Well-being days 
• Volunteer Day off
• Work from Home Equipment
• Free Calm App Subscription #1 app for meditation, relaxation and sleep 🧘‍♀️ 
• Continuous Training and Development, including access to Udemy Business 
• Spend up to 2 months working outside of your country of employment over a rolling 12-month period with our ‘Work from Anywhere’ policy
• Employee Referral Program  
• Team Social Budget & Company-wide Socials 

Our mission.

We have one mission. To help businesses grow. To make data easier. And to make the world a better place. We’re not a start-up. Not anymore. But we’ve not been around that long either. What we are is a collection of bright, passionate minds harnessing complexities and helping our clients and their communities. One culture, made of many. Heading in one direction – the future.

It’s all about you.

We want you to feel welcome, valued, and respected—because it’s your individuality and passion that make you Q. We see that, and we celebrate it. That’s why we’re proud to be an Equal Opportunity Employer.

We are committed to fostering an inclusive and diverse work environment, continuously improving to ensure everyone belongs. Our recruitment process is designed to be inclusive and accessible. If you need any reasonable adjustments or accommodations, please let our Talent Acquisition Team know—we’re happy to assist.

No matter your race, beliefs, color, national origin, gender, sexual orientation, age, marital status, neurodiversity, or abilities—whoever you are—if you're a passionate, curious, and caring human eager to push the boundaries of what’s possible, we want to hear from you.

start. don’t stop – Apply