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.