Job Description

We're partnering with a fast-growing sports/entertainment business to hire a Senior Backend Engineer with hands-on experience in HubSpot and complex backend systems. This is a 6-month contract, outside IR35, with potential for extension or permanent conversion.

The Role

You'll take full ownership of the Commercial Data Manager (CDM) platform and the HubSpot ecosystem, bringing previously external-managed systems fully in-house. This role combines backend development, integrations, and stakeholder collaboration, giving you real technical leadership and system ownership from day one.

Key Responsibilities:

• Lead the CDM platform (70%) and HubSpot system (30%)
• Take over HubSpot maintenance, expansion, and integrations
• Collaborate closely with commercial stakeholders to implement new fields/features
• Mentor engineers and shape team practices
• Drive architecture and integration decisions across multiple services

Team Environment:

• Distributed across UK & Poland
• Key stakeholders: Architect, Engineering leadership, Delivery, Commercial team
• Hybrid environment with flexible UK/EU remote options; Holborn office optional

Required Skills & Experience

Must-have:

• Node.js / TypeScript / JavaScript in production
• Experience with large, complex backend systems
• Cloud experience (preferably AWS; GCP/Azure also fine)
• System design & architecture experience
• Integration-heavy environments
• Previous HubSpot experience essential

Priority Skills:

• Mentorship, leadership, and architecture thinking
• Collaboration with product and engineering stakeholders
• Scaling complex backend systems

Nice-to-have:

• DevOps/SRE awareness
• High-scale platforms (gaming, sports, fintech, marketplaces)
• Experience with complex workflows or multi-service integrations

Experience Level:

• 6-8+ years, hands-on senior engineer

Soft Skills & Culture Fit

• Strong communication and collaboration skills
• Leadership mindset, proactive and solution-focused
• Can explain technical decisions clearly
• Commercial awareness and creative problem solving

Avoid:

• Strong technically but poor communication
• Purely task-focused, non-proactive contractors

Contract & Logistics

• Length: 6 months (potential to extend or perm conversion)
• Rate: £575/day (Outside IR35)
• Start: ASAP
• Remote UK/EU (Holborn optional)