Senior Backend Engineer
Harnham · England
Senior Backend Engineer at Harnham, based in England. This is a contract role.
- Salary
- Competitive
- Location
- England
- Contract
- Contract
- Posted
- 6 hours ago
- Closes
- 23 Nov 2026
- Sector
- IT & Software
Reference https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-senior-backend-
About the role
To Apply for this Job Click Here
Senior Backend Engineer Contractor
£594 per day | Remote | Outside IR35 | 8-Months
This is an exciting opportunity to join a technology-driven business on a key contract assignment, taking ownership of a business-critical commercial data platform. You’ll combine hands-on backend engineering with technical leadership, helping shape platform architecture, improve system reliability, and drive the adoption of emerging AI capabilities.
The Company
They are a well-established digital business operating at scale, leveraging technology, data, and automation to support commercial growth across multiple markets. With a strong focus on innovation, they invest heavily in modern engineering practices and integrated systems that enable business performance. You will join a collaborative environment where engineering plays a central role in delivering strategic outcomes and operational excellence.
The Role and Deliverables
- Own the ongoing maintenance, enhancement, and technical direction of a core commercial data platform.
- Design, build, and deliver new backend features using Node.js, TypeScript, and modern integration patterns.
- Lead technical discussions with engineering, product, and commercial stakeholders to define requirements and solution designs.
- Drive architecture decisions, identify dependencies, and improve platform scalability, reliability, and performance.
- Manage and enhance HubSpot integrations and broader CRM-related workflows across the business.
- Support the implementation of Agentic AI capabilities and mentor engineers within the wider team.
Your Skills & Experience
- Strong commercial experience developing backend applications with Node.js, TypeScript, and JavaScript.
- Proven capability designing scalable systems, integrations, and backend architectures.
- Experience working with HubSpot integrations or a strong understanding of the HubSpot platform and ecosystem.
- Knowledge of CRM platforms, commercial systems, and complex data workflows.
- Practical experience implementing or supporting Agentic AI solutions within production environments.
- Strong stakeholder management skills, with the ability to communicate effectively with both technical and non-technical audiences.
- Demonstrated ownership of technical initiatives from design through delivery.
- Experience mentoring engineers and contributing to high-performing engineering teams.
- Familiarity with API integrations, GitHub, and CI/CD tooling such as GitHub Actions.
- Exposure to event-driven architectures, Kafka, DevOps practices, or marketing technology platforms would be beneficial.
- Experience within affiliate marketing, gaming, gambling, MarTech, customer data platforms, or CRM-led organisations is advantageous.
How to Apply
If you are a Senior Backend Engineer with strong Node.js expertise, HubSpot integration experience, and an interest in Agentic AI, please apply to discuss this contract opportunity in more detail.
To Apply for this Job Click Here
Reference: https://www.harnham.com/job/e1aeb1da-8723-4ba1-d23d-08d5948a7341-senior-backend- · Posted 6 hours ago · Closes 23 Nov 2026 · Listed via Harnham
Apply for this job
This role is listed via Harnham. Applications are handled on the employer's site.
Apply on employer siteOpens the employer's website in a new tab.
Safe applying: a genuine employer will never ask you to pay for a DBS check, training or equipment, or move you onto WhatsApp before you are hired. If this listing does, report it and do not pay anything.