Software Engineer

Quantexa; City Of London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Competitive salary

Company bonus

25 days annual leave

Pension scheme 6%

Private Healthcare

Life Insurance

Income Protection

Well‑being days

Work from Home equipment

Work from Anywhere policy

Job summary

Quantexa in London is seeking a Software Engineer to shape the Decision Systems component of our Decision Intelligence platform. You will work across the stack, turning requirements into well-engineered features and collaborating with product teams and delivery experts to deliver impact.

This role emphasizes autonomy, stakeholder management, and embracing agentic AI tooling to accelerate feature delivery. You will contribute to tooling for configuring detection logic, improving scores, and

Qualifications

• Take pride in designing, building and delivering high quality well engineered solutions to complex problems.
• Take a big picture approach to solving problems, taking care to ensure that the solution works well within the wider system.
• Ability to translate business and product requirements into clear technical designs and working features, making effective use of AI tooling whilst owning the quality of the end result.
• Strong programming fundamentals in at least one modern programming language.
• An understanding of how to write code that performs well and scales reliably when processing high volumes of data.
• Have experience of the full engineering life cycle, from design and implementation through to testing and deployment.
• Passion and drive to grow within one of the UK’s fastest growing scale-ups.
• Beneficial: Scala or Java experience; big data tech (Spark, Hadoop, Elasticsearch); REST APIs with OpenAPI; frontend with Angular/TypeScript; agentic AI tools; DevOps tooling; data pipelines; data cleansing/standardising.

Responsibilities

• Building new tooling to allow users to configure detection logic more easily and effectively.
• Enhancing the platform so that existing Scores can be applied across a wider range of scenarios.
• Improving the performance of the system so even the largest datasets can be analysed efficiently.

Skills

Programming fundamentals

Systems design thinking

AI tooling usage

Data processing at scale

Full lifecycle development

Stakeholder collaboration

Tools

Spark

Hadoop

Elasticsearch

OpenAPI

Angular

TypeScript

GitHub Copilot

Claude Code

Cursor

DevOps tooling

ETL pipelines

Job description

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.

Opportunity

As a Software Engineer at Quantexa, you’ll play a key role in shaping one of the most critical components of our Decision Intelligence platform: Decision Systems.

The Decision Systems team is responsible for turning complex, interconnected data into actionable insights — helping global organizations detect patterns, uncover risks, and make smarter decisions. You’ll work across the software stack, from enhancing our scoring capabilities to uncover financial crime, to building tools that make detection logic easier and more powerful for our users. Your work will directly influence how clients identify suspicious activity and protect their businesses.

This isn’t just about coding, stakeholder management will be a growing focus of this role. You’ll have the autonomy to take features from concept to release, collaborating closely with product teams and delivery experts to design solutions that make a real impact. You’ll be part of a talented, supportive team that values innovation, knowledge sharing, and continuous improvement, working closely with and learning from our senior and lead engineers.

The role is focused on software development using the latest in agentic AI tooling, with an emphasis on translating requirements into well-engineered, working features. Typical tasks in the team are:

• Building new tooling to allow users to configure detection logic more easily and effectively
• Enhancing the platform so that existing Scores can be applied across a wider range of scenarios
• Improving the performance of the system so even the largest datasets can be analysed efficiently

There are 3 different sub-teams within Decision Systems, each focusing on different areas across the scoring capability within Quantexa. Specifics of the remit and differences between these teams can be shared upon request.

We have a great team culture, with regular socials and a strong presence in Quantexa’s London office, whilst maintaining a flexible working policy allowing for regular home working. Come and be a part of the next stage of the growth of our team and Quantexa as a whole!

Requirements

What do I need to have?

• Take pride in designing, building and delivering high quality well engineered solutions to complex problems
• Take a big picture approach to solving problems, taking care to ensure that the solution works well within the wider system
• Ability to translate business and product requirements into clear technical designs and working features, making effective use of AI tooling whilst owning the quality of the end result
• Strong programming fundamentals in at least one modern programming language
• An understanding of how to write code that performs well and scales reliably when processing high volumes of data
• Have experience of the full engineering life cycle, from design and implementation through to testing and deployment
• Passion and drive to grow within one of the UK’s fastest growing scale-ups

Experience in the following would be beneficial but not essential:

• Commercial experience with Scala or Java, or Functional Programming experience in other languages
• Working with big data technology, ideally Spark but others will also be useful such as Hadoop or Elasticsearch
• Designing and building REST APIs (we take an OpenAPI spec-first approach)
• Frontend development with Angular and TypeScript
• Hands‑on experience with agentic AI coding tools (e.g. Claude Code, Cursor, GitHub Copilot), such as using them to deliver features end-to-end or building custom workflows and integrations around them
• Experience with DevOps tooling and approaches (automation and tooling is something we are passionate about, we even have a dedicated Developer Tooling team)
• Building data processing pipelines for use in production batch systems, including either traditional ETL pipelines and/or analytics pipelines
• Manipulating data through cleansing, parsing, standardising etc, especially in relation to improving data quality/integrity

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.

We offer:

• Competitive salary & Company bonus
• 25 days annual leave (with the option of buying up to 5 days, and rolling over up to 10), plus national holidays + your birthday off!
• Pension scheme with a company contribution of 6% (when you contribute 3%)
• Private Healthcare, including dental & optic cover
• Life Insurance and Income Protection
• Regularly bench‑marked salary rates
• Enhanced Maternity, Paternity, Adoption, or Shared Parental Leave
• Well‑being days
• Volunteer Day off
• Work from Home Equipment
• Commuter, Tech and cycle to work schemes
• Free Subscription to a meditation, relaxation and sleep app
• Continuous Training and Development
• Spend up to 2 months working outside of your country of employment over a rolling 12-month period with our ‘Work from Anywhere’ policy
• 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 youQ. 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.