Backend / Integrations Engineer (Node.js, Medusa) – Contract, Remote

About us HRS Commerce (hrscommerce.com) is a hosted e-commerce platform for UK and EU supplement brands. Each store gets its own shop front, checkout, order management, shipping and email marketing. It’s built on Medusa (Node.js/TypeScript) with Postgres, hosted on Railway, with Cloudflare in front. The platform is live with paying stores and growing. The role We’re looking for a careful, experienced backend engineer to own the technical side: the integrations that move orders, money and parcels. You’ll work directly with the founder and our UI/graphics designer. What you’ll work on Courier integrations: Royal Mail Click & Drop now, with Evri and DPD (directly or via Sendcloud) next Payment connections: Stripe, Atlos (crypto) and Fena (open banking), including webhooks and refunds Store imports from WooCommerce and Shopify (orders, customers, products, discount codes) Email sending and deliverability (Mailjet / Mailgun) Deploys, backups, monitoring (Sentry) and keeping several stores safely up to date What we’re looking for Strong Node.js / TypeScript and Postgres Real experience connecting to third-party APIs, including webhooks, retries and idempotency E-commerce background; Medusa, Shopify apps or WooCommerce experience is a big plus Comfortable with Railway / Docker / Cloudflare, or similar Safety-first habits: you test on staging, you never fire test orders at real carriers or payment accounts, and you write down what you changed Nice to have UK shipping experience (Royal Mail, Evri, DPD, labels, tracking) Experience with regulated or high-risk merchant categories How we work Remote, long-term, part-time to start (around 10–15 hours a week), increasing as the platform grows Starts with a short paid trial task (for example, adding a new courier to a test store) Access to live stores comes after the trial Weekly written update: what you did, what’s next, anything blocked To apply, please include: A short note on an integration you’ve built (carrier, payment or marketplace) and what went wrong along the way Your GitHub or examples of your work Your hourly rate and the hours you can give each week Start your reply with the word “Parcel” so we know you’ve read this.