Overview

Senior Backend Engineer at Onetrace

Location: Canary Wharf, London - WeWork (Hybrid Remote)

Basis: Full-time, permanent

Reporting to: Director of Product Engineering

What you’ll do

• Design, build, and maintain backend services using Node.js and TypeScript
• Evolve our architecture for scalability, performance, and maintainability
• Refactor and modernise legacy systems to reduce technical debt
• Design and enhance RESTful APIs, ensuring consistency, security, and clear documentation
• Integrate with both internal and external services, building reliable, well-tested connections
• Implement and improve observability: logging, metrics, monitoring, and alerting
• Optimise database performance across MongoDB and SQL-based systems
• Introduce and maintain patterns, tooling, and frameworks that improve developer experience
• Collaborate cross-functionally to translate product requirements into technical solutions
• Mentor engineers through code reviews, pairing, and knowledge-sharing sessions

Your tech stack

Essential

• JavaScript / TypeScript core programming languages
• Node.js primary backend framework
• MongoDB or other NoSQL database
• SQL databases and query optimisation
• RESTful API design and implementation
• Git version control and collaborative workflows
• Backend testing strategies (unit, integration, end-to-end)
• Experience with monitoring, logging, and observability tools
• Knowledge of scalable system architecture and design patterns

Highly desirable

• AdonisJS, NestJS or similar MVC frameworks
• AWS infrastructure and services
• Infrastructure as Code (Terraform or similar)
• Distributed systems experience
• Message queues and background job processing
• Caching strategies and performance optimisation
• CI/CD pipelines and DevOps practices

Nice to have

• Security best-practices implementation
• Experience in a growth-stage startup or B2B SaaS
• Knowledge of the construction industry

What We Offer

• 25 days PTO, plus bank holidays
• Enhanced parental leave
• Private medical insurance with Bupa
• NEST pension scheme
• Employee assistance programme
• Remote work abroad opportunities
• Apple MacBook and tech accessories
• Onetrace merch, regular team socials and annual company offsites

Diversity

Onetrace 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 will only be used for applying a reasonable adjustment. Please note that our office is a dog-friendly environment. Candidates should be aware that dogs are present in the workplace, which may include shared spaces. If you have allergies or concerns, please let us know in advance.

London, England, United Kingdom