Back End Engineer

Department: Technology

Location: London (hybrid)

Employment Type: FullTime

Our Company
At Quantum, we connect global brands with high-intent consumers. We turn intent into action and complexity into clarity.

Our Mission is clear, to help smarter, faster buying decisions. Our vision, to be the world’s most used digital comparison service, delivering value and simplicity to millions.

We drive growth through data-driven affiliate marketing built for performance from day one. Every campaign is measurable, optimised in real time, and designed to scale.

With in-house tech, full-stack analytics, and a compliance-first mindset, we give our partners an edge. We drive confident decisions and growth in regulated and high-growth sectors. We’ve helped ambitious brands grow faster, smarter, and globally.

The Role

Our Technology team is growing! We’re looking for Back End Engineers to help rapidly grow our technology platform to deliver our ambitious business growth.

In this role, you will take ownership of backend systems and services - driving high-quality development, shaping our architectural direction, and delivering robust technical solutions across the product lifecycle. While your primary focus will be backend engineering and system design, you will also guide other developers, contribute to technical decision-making, and ensure engineering best practices are consistently upheld.

You’ll be both a hands-on individual contributor and a technical evangelist, collaborating closely with cross-functional teams to build scalable, efficient, and resilient systems using modern frameworks and tools.

Key Responsibilities:

• Lead by example as a hands-on backend developer, contributing to high-quality, production-grade codebases.

• Define backend architecture and system design, ensuring scalability, reliability, security, and performance.

• Build and maintain RESTful APIs, microservices, and server-side logic using modern backend frameworks.

• Provide technical guidance and mentorship to other engineers, ensuring code quality through reviews and best practices.

• Collaborate with product, data, and platform teams to design and deliver backend solutions that align with business goals.

• Optimise application performance, troubleshoot complex issues, and implement robust monitoring and logging solutions.

• Contribute to DevOps processes, CI/CD pipelines, and infrastructure automation.

About You:

• Strong experience with Node.js, Express.js, or similar backend frameworks.

• Expertise in designing and building RESTful APIs, microservices, and distributed backend systems.

• Proficiency working with either SQL (PostgreSQL, MySQL) OR NoSQL (MongoDB) databases, including schema design and optimisation.

• CI/CD & DevOps: Experience integrating automated tests into CI/CD pipelines (e.g., Jenkins, GitLab CI, CircleCI) and familiarity with containerisation tools like Docker.

• Experience with cloud platforms (AWS, GCP, Azure) and infrastructure-as-code is a plus.

• You thrive in collaborative team environments.

• Comfortable working in a fast-paced, evolving setting.

• Excellent written and verbal English skills.

• And last but not least - you have no ego and value teamwork over individual glory!

What You’ll Get

• Competitive Base Salary

• Company Bonus Scheme

• Hybrid Working (3 days in office)

• Private Health Care (Bupa)

• Travel Insurance

• Market Leading Training Programme

• Recognition & Reward Scheme

• Annual Company Conference (previous destinations Vienna, Bologna, Dubrovnik and Thessaloniki)

• Regular Happy Hour / Team Lunches

• Free Coffee, Drinks & Snacks
  

What’s the next step?

Our hiring process ensures we're recruiting the right people for the role. We ensure that people are as suitable for us as we are for them.

If you like the sound of what we're all about at Quantum and want to join a team where you can make an impact, please apply or contact us at [email protected].