Back End Engineer

Quantum

Back End Engineer contributing to high quality development at Quantum, a digital comparison service. Building scalable systems and mentoring developers in a hybrid work environment.

Posted 4/12/2026full-timeLondon • 🇬🇧 United KingdomMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

AWSAzureCloudDockerGoogle Cloud PlatformJavaScriptJenkinsMicroservicesMongoDBMySQLNode.jsNoSQLPostgresSQL

About the role

Key responsibilities & impact

Lead by example as a hands on backend developer, contributing to high quality, production grade codebases
Shape backend architecture and system design with a focus on scalability, reliability, security, and performance
Build and maintain RESTful APIs, microservices, and server side logic using modern backend frameworks
Mentor and support other engineers, championing code quality through thoughtful reviews and shared best practices
Partner with product, data, and platform teams to design and deliver backend solutions that serve real business needs
Improve application performance, troubleshoot complex issues, and implement robust monitoring and logging solutions
Contribute to DevOps processes, CI/CD pipelines, and infrastructure automation

Requirements

What you’ll need

Solid experience with Node.js, Express.js, or similar backend frameworks
Strong background in designing and building RESTful APIs, microservices, and distributed backend systems
Comfortable working with SQL (PostgreSQL, MySQL) or NoSQL (MongoDB) databases, including schema design and optimisation
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 would be a bonus
You do your best work as part of a team and genuinely enjoy collaborating across disciplines
Comfortable navigating a fast moving, evolving environment
Excellent written and verbal English skills
Collaborative and grounded you value collective success and create space for others to thrive

Benefits

Comp & perks

Private Health Care (Bupa)
Hybrid Working (3 days in office)
Travel Insurance
Competitive Base Salary
Company Bonus Scheme
Market-Leading Training Programme
Recognition & Reward Scheme
Annual Company Conference (previous destinations: Vienna, Bologna, Dubrovnik, Thessaloniki)
Regular Happy Hours & Team Lunches
Free Coffee, Drinks & Snacks

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Node.jsExpress.jsRESTful APIsmicroservicesSQLPostgreSQLMySQLNoSQLMongoDBCI/CD

Soft Skills

mentoringcollaborationcommunicationproblem-solvingteamworkadaptabilitycode qualitythoughtful reviewscollective successsupporting others