Senior Product Engineer (Full-Stack)

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Onetrace is seeking a Senior Full-Stack Product Engineer in London’s Canary Wharf (hybrid, full-time, onsite at WeWork), reporting to the Director of Product Engineering. You’ll own end-to-end feature delivery from concept to deployment, building scalable backend services and intuitive frontend experiences while shaping technical strategy and mentoring peers. Core requirements include JavaScript/TypeScript, Node.js, MongoDB or other NoSQL, SQL, RESTful APIs, Git, testing, and strong observability with a focus on scalable architecture and data-driven decisions; familiarity with modern AI tools is a plus. Desirable: AdonisJS or NestJS, AWS, infrastructure as code, distributed systems, queues, caching, CI/CD. To apply, tailor your resume to show measurable impact, end-to-end ownership, collaboration with product and design, and readiness for hybrid work, and include links to the full job description.

Job Title: Senior Product Engineer (Full-Stack)
Department: Product Engineering
Basis: Full-time, permanent
Location: Canary Wharf, London - WeWork (Hybrid)
Reporting to: Director of Product Engineering

About the role

We’re looking for a Senior Full-Stack Product Engineer to join Onetrace as we continue to grow our platform. You’ll take ownership of features from concept to deployment, building scalable backend services and intuitive frontend experiences. You’ll also help shape technical decisions, champion best practices, and contribute to the future direction of our product.

What you’ll do

• Own end-to-end delivery of features that solve real customer problems, from understanding user pain points through to shipped functionality across UI, application logic and database layers

• Build intuitive, performant interfaces that customers actually want to use—balancing user needs, accessibility, and technical constraints while ensuring features work reliably across devices and contexts

• Use customer feedback, analytics, and direct user insights to inform technical decisions, prioritise improvements, and validate that shipped features deliver measurable value

• Design and implement complex data flows, API integrations, and background processing systems that handle high-volume operations reliably while maintaining system performance and data integrity

• Partner with product, design, and customers to shape solutions early, translating business requirements into technical architecture while surfacing risks and opportunities that impact customer outcomes

• Mentor and coach other engineers, raising the bar for technical excellence through code reviews, pair programming, and architectural guidance

What you’ll bring

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

• Testing strategies (unit, integration, end-to-end)

• Experience with monitoring, logging, and observability tools

• Knowledge of scalable system architecture and design patterns

• Familiarity with modern AI tools and a habit of staying up to date with how they can improve engineering workflows

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

Interview process

• 1st Stage – Introductory Conversation
  A 45-minute conversation with our Senior Talent Partner focused on your background, motivations, and overall fit for the role and business.

• 2nd Stage – Technical & Product Discussion
  A 45-minute discussion with our Director of Product Engineering to explore your technical experience, product mindset, and approach to building scalable solutions.

• 3rd Stage – Onsite Technical Task
  A 2.5-hour onsite collaborative technical exercise designed to simulate real-world problem solving, technical decision-making, and teamwork.

• Final Stage – Leadership Conversation
  A 1-hour virtual Q&A session with our CEO focused on leadership, collaboration, and alignment with Onetrace’s vision and culture.

🔗 Full Job Description: https://onetrace.com/careers/senior-product-engineer