Overview

Join to apply for the

Senior Backend Engineer

role at

Onetrace .Basis: Full-time, permanent. Location: Canary Wharf, London - WeWork (Hybrid Remote). Reporting to: Director of Product Engineering. Onetrace is expanding into new trades and going global. We are bootstrapped, profitable, and driven by a clear mission to lead the digital transformation for subcontractors, one trade at a time.We’re not your typical “move fast and break things” company. We believe in building thoughtfully and shipping quality software that genuinely helps our customers solve real problems. Working here means being a product engineer, not just a backend or frontend specialist. You’ll see your code in action helping people get their jobs done with less friction.Want to learn more about our journey? Check out our LinkedIn page. We value transparency, honest communication, and engineers who genuinely care about the impact of their work.The role

As a

Senior Backend Engineer

at Onetrace, you’ll strengthen our backend systems and empower the entire engineering team to build with confidence and velocity. You’ll tackle technical debt, evolve our architecture for scale, and create well-documented patterns and tooling that make our platform more resilient, performant, and developer-friendly. You’ll collaborate across the stack with engineers, product managers, and designers to ensure our platform foundations enable great product experiences.What you’ll do

Design, build, and maintain backend services using

Node.js

and

TypeScriptEvolve our architecture for scalability, performance, and maintainabilityRefactor and modernise legacy systems to reduce technical debtDesign and enhance RESTful APIs with security and clear documentationIntegrate with internal and external services, building reliable, well-tested connectionsImplement and improve observability: logging, metrics, monitoring, and alertingOptimise database performance across MongoDB and SQL-based systemsIntroduce and maintain patterns, tooling, and frameworks that improve developer experienceCollaborate cross-functionally to translate product requirements into technical solutionsMentor engineers through code reviews, pairing, and knowledge-sharing sessionsBeyond the backend

We expect engineers to think and work like full stack product engineers – flexible, collaborative, and willing to jump into whichever part of the stack will best solve the problem. This may include refining APIs, scaling services, pairing with frontend engineers, or tweaking infrastructure to remove bottlenecks.Node.js

– primary backend frameworkMongoDB

or other NoSQL databaseSQL databases

and query optimisationRESTful API

design and implementationGit

– version control and collaborative workflowsBackend testing strategies (unit, integration, end-to-end)Monitoring, logging, and observability toolsKnowledge of scalable system architecture and design patternsHighly desirable

AdonisJS, NestJS or similar MVC frameworksAWS infrastructure and servicesInfrastructure as Code (Terraform or similar)Message queues and background job processingCaching strategies and performance optimisationCI/CD pipelines and DevOps practicesNice to have

Security best-practices implementationExperience in a growth-stage startup or B2B SaaSKnowledge of the construction industryWhat we offer

Enhanced parental leavePrivate medical insurance with BupaEmployee assistance programmeRemote work abroad opportunitiesApple MacBook and tech accessoriesOnetrace merch, regular team socials and annual company offsitesOnetrace is committed to diversity in the workplace and proud to be an equal opportunity employer. If you require a reasonable adjustment, please contact us. All information will be kept confidential and used for applying a reasonable adjustment.Please note that our office is a dog-friendly environment. Dogs may be present in shared spaces; please raise any allergies or concerns in advance.Seniority level

Mid-Senior levelEmployment type

Full-timeJob function

Engineering and Product ManagementIndustries: Software DevelopmentReferrals increase your chances of interviewing at Onetrace. Get notified about new Back End Developer jobs in London Area, United Kingdom.

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