MissionHires

Moonshot Partners is hiring a Contract Full Stack Developer to support a major digital transformation for a UK public sector membership organization. You'll help maintain a legacy Sitecore platform while building a modern headless stack with Storyblok, Next.js, and React. Initial priority is auditing and implementing robust analytics/tracking (GTM/GA4), followed by integrations (SSO, Stripe, Algolia), APIs, and ongoing enhancements. This fully-remote UK-hours role partners with a Product Owner and external vendors during migration, then helps establish strong in-house engineering practices. Responsibilities Audit, clean, and standardize Google Tag Manager (client/server-side) and ensure GA4 data accuracy Design and implement scalable tracking architecture and event schemas for Storyblok + Next.js Implement event tracking across the Next.js front end and maintain tracking parity during migration Support current Sitecore platform with minor features, bug fixes, and transitional logic updates Post-launch optimisation on the new platform: bug fixing, performance, accessibility, and API maintenance Design scalable Storyblok content models aligned with headless best practices Build and maintain integrations: SSO (OAuth/SAML/partner) and Partners Enhance personalisation and membership logic by tier, behaviour, and status Implement subscription renewals, upgrades, Stripe Billing logic, webhooks, and customer portal Support and enhance an existing PWA and contribute to new roadmap features Collaborate with Product Owner and external partners; help transition capabilities in-house Contribute to an API-driven architecture using .NET and Azure API layers Requirements 5+ years professional software development experience with production systems Hands on expertise with Google Tag Manager (client side and server side/Stape) and GA4 Strong JavaScript skills with React and Next.js; Tailwind CSS experience Back-end/API development experience with .NET and Azure API layers Experience implementing authentication systems (e.g., Supabase) and SSO (OAuth/SAML) Headless CMS experience; Storyblok strongly preferred (Sitecore familiarity a plus) Payments and subscriptions experience with Stripe Billing; webhook implementation Experience with Algolia search; familiarity with GoCardless and Microsoft Dynamics (CRM) beneficial Understanding of personalisation strategies and data driven content segmentation Experience with PWAs and headless architectures is a plus Fluent English (written and spoken); excellent collaboration, ownership, and accountability Availability to work Monday-Friday, 9:00-5:00 UK time in a fully-remote setup

MissionHires is seeking a Contract Full Stack Developer to support digital transformation for a UK public sector membership organization. You will work fully remote within UK hours, focusing on maintaining a legacy platform while building modern solutions with Storyblok, Next.js, and React. The role involves enhancing tracking analytics, building integrations, and collaborating closely with external vendors and in-house teams throughout the project lifecycle. Applicants should have over 5 years of development experience, particularly with Google Tag Manager and React.