Senior Software Engineer

Senior Backend / Full Stack Engineer (Contract) – Integrations Team

Outside IR35 / B2B | Fully Remote

Evantis is partnering with a fast-moving tech company that's expanding a newly formed integrations-focused engineering team, responsible for how external partners connect into their platform.

We're looking for hands-on backend engineers who enjoy building and delivering real production systems — people who are comfortable owning features end to end rather than operating at a purely architectural level.

This is a greenfield scope, with a strong emphasis on delivery and implementation.

What you'll be doing

• Building backend services and APIs using Node.js and TypeScript
• Designing and implementing partner integrations (REST APIs, webhooks, lightweight plugins)
• Owning end-to-end flows including validation, queuing, retries, processing, and responses
• Working with cloud-native services (GCP environment) to deliver scalable solutions
• Collaborating with principals and product teams while remaining a builder-first IC
• Operating in a startup-style environment where priorities can evolve week to week

What we're looking for

• Strong hands-on backend engineering experience (senior IC level)
• Deep practical experience with Node.js, TypeScript, REST APIs
• Comfortable explaining and delivering implementation detail, not just high-level design
• Experience integrating with external systems or third-party APIs
• Familiarity with cloud platforms and CI/CD pipelines
• Exposure to CMS or partner integrations (WordPress, Shopify, Zapier, etc.) is a bonus, not a requirement
• Enjoys working autonomously and shipping working software

Details

• Location: Fully Remote (UK or EU timezone overlap)
• Engagement: Outside IR35 / B2B
• Start: January
• Interview Process: Single-stage technical interview (whiteboard + implementation discussion)

If this sounds like a good fit, please apply or reach out directly for more information.