Backend Engineer

watchTowr
London

Hello, let us introduce ourselves!

watchTowr is the Preemptive Exposure Management capability trusted by Fortune 500 companies and critical infrastructure providers.

By combining proactive threat intelligence, real attacker telemetry, and automated red teaming, watchTowr continuously identifies and validates real exposure - so security teams can outrun real-world threats.

When exploitation happens in hours, watchTowr delivers what no one else can: time to respond.

We are a global team of operators, researchers, and engineers who have spent years thinking like attackers - and we are now building the technology to stop them. Our work is recognised across the industry, with original vulnerability research from watchTowr Labs and innovations like Instinct and Attacker Eye shaping the future of cybersecurity.

Backed by $29M in funding, recognised by Gartner, and scaling fast across the globe, we are in a high-growth phase of our journey. We are a young, high-energy, and research-driven team, obsessed with building world-class technology - and we want exceptional people to join us.

But what’s the role?

We are looking for an ambitious Backend Engineer with solid prior experience to join us, and help our clients navigate and make sense of highly critical information that they will have access to, in our mission of helping organisations understand how they could be hacked - in real-time.

You'll be part of a high-impact team working to help some of the world’s largest enterprises understand their real-time security exposure. Your work will directly shape how our platform ingests, processes, and serves critical vulnerability data at scale.

Sounds great – what will I do?

  • You will have a leading role in designing, developing and maintaining the backend system that powers our cybersecurity platform - the platform we use to identify vulnerabilities in large enterprises

  • You will work closely with our front-end engineers to connect data pipelines to our user-facing platform and other presentation layers

  • You will tackle technology and data problems – how do we continuously improve our handling, processing, and presentation of data?

  • You will develop for scale, building scalable micro-services.

Sounds perfect to me, what specifics are you looking for?

Technologies

  • Backend: FastAPI, Airflow

  • Database: MySQL, MongoDB

  • Message Queues: Kafka, RabbitMQ

Ideal Experience

Ideally, you should have 3 or more years of experience:

  • Designing, building and maintaining mission-critical micro-service applications

  • Handling data stored in both relational and non-relational database management systems

  • Writing clean, testable code and are familiar with different testing strategies

  • With architecture patterns such as event-sourcing and CQRS.

Bonus Experience
It’ll also be awesome if you:

  • Have experience working with significant amounts of data and handling ‘big data’ for security analysis

  • Have experience in platform engineering work such as creating CI/CD pipelines and understand common deployment patterns

  • Have worked in an Agile environment with a strong DevOps culture.

What’s in it for me?

  • Competitive compensation - we believe that hard work, skills and ambition should be fairly compensated.

  • Meaningful role in a company - You will be a key and early contributor to a fast-growing cybersecurity business that helps protect some of the world's largest enterprises.

  • The best tools and powerful kit - we enable you with the tools to effectively fulfil your role.

  • Endless opportunities – we are in a high-growth phase of our journey, and plan to promote from within as we scale.

  • Work with cyber security experts – we are solving cutting-edge industry-wide cyber security challenges with some of the world’s most advanced organisations.

watchTowr is proud to be an Equal Opportunity Employer

At watchTowr, we’re dedicated to fostering an inclusive, respectful, and diverse environment where every individual is recognised for their talent and potential. Our hiring decisions are guided by your capabilities, experience, and what you bring to the role - not by unrelated personal attributes.

We have a zero-tolerance approach to any form of discrimination or harassment. This includes - but isn’t limited to - discrimination based on race, ethnicity, religion, colour, nationality, sex, sexual orientation, gender identity or expression, age, disability, pregnancy or parental status, veteran status, or any other characteristic protected by law.

We actively encourage people from all backgrounds to apply. Even if you don’t tick every box in the job description, we’d still love to hear from you.

Posted 2026-03-21

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