Senior Full Stack Engineer

MR MARVIS is an Amsterdam-based menswear brand, dedicated to creating the perfect shorts, trousers and tops. As a Certified B Corporation, we’re proud to be part of a community of companies working together for change, and taking part in collective action to advocate for a shared goal of a global economy that benefits people and the planet. Our Data & Engineering team works across the full e-commerce stack: storefront, content, search, integrations, operations, and the internal platform capabilities that keep the business moving. We’re looking for a Senior Full Stack Engineer to join our Data & Engineering team and help shape the next phase of our digital platform. The Role This is a senior, hands-on role that spans three connected parts of our stack: * The commerce Front End. Our headless storefront - TypeScript, Next.js and React on Vercel, with Shopify, Sanity and Algolia behind it - serving ten locales across Europe. Real challenges here: multi-market pricing and inventory, rendering and caching performance at scale, and experimentation. * Durable integrations. We’re replacing a low-code iPaaS with integration workflows we own: TypeScript durable jobs, event-driven messaging, and the reliability primitives that go with them - idempotency, retries, replay, dead-lettering, and actually knowing when something failed. This covers the flows the business runs on: products, orders, inventory, returns, refunds and fulfilment, across Shopify, our ERP (Odoo) and our 3PL. * Working with the data platform. Our data team runs a Python and GCP stack - BigQuery, dbt, Dagster, dlt, Airbyte. You won’t own it, but you’ll work closely with it: the same operational entities flow through both worlds, and the contracts between them are where a lot of value and a lot of breakage live. * You’ll work closely with product, design, data, operations and our Lead Engineer, and co-own critical technical domains as we grow. What you’ll do * Build and improve our headless commerce storefront in Next.js, React and TypeScript, integrated with Shopify, Sanity and Algolia. * Design and build our in-house integration platform - durable, observable TypeScript workflows on GCP, replacing dependency-heavy external tooling with systems we can reason about, test and debug. * Make business-critical flows resilient: product data, orders, inventory, returns and fulfilment integrations across Shopify, Odoo and our 3PL. * Own architectural decisions and technical delivery across key parts of the platform, and write them down - we use architecture docs and decision records. * Partner with the data team on the contracts between operational systems and the warehouse, so analytics and operations agree on what happened. * Raise the floor on engineering practice: testing, observability, code quality, documentation and incident prevention. * Mentor mid-level and junior engineers through pairing, review and coaching. * Work with product owners and stakeholders to balance speed, quality and business impact. What we’re looking for * Significant experience as a full stack engineer, ideally in a senior or lead capacity. * Strong TypeScript, React and Next.js, and a real grasp of modern web application architecture, rendering strategies, caching, and where the performance costs actually are. * Solid backend and distributed-systems instincts: APIs, event-driven messaging, background jobs, retries and idempotency, and integration patterns between systems you don’t control., Integrations & jobs: Durable TypeScript workflows, event-driven messaging, GCP Cloud Run, Odoo, 3PL and payment integrations * Data platform (our data team): BigQuery, dbt, Dagster, dlt, Airbyte * Cross-cutting: OpenTelemetry and Grafana, feature flags and experimentation, Vitest and Playwright, modern CI/CD What you’ll get * 25 vacation days; * A pension scheme, because later is also important; * Mobility allowance in case you live outside of Amsterdam; * All equipment needed to set you up for success; * Daily free & fresh lunch served at the office; * 20% discount on the entire MR MARVIS collection; * Monthly “Wellbeing budget for Swapfiets, Treatwell, or several gyms. Want to invest your budget? You can, via Peaks! * Free unlimited access to OpenUp (coaching/psychologists platform) as well as Meditation Moments (meditation App); * Personal development opportunities to help you grow and excel in your role; * Hybrid working with an inspiring office (balancing home focus time with 60% of your week spent together in person)

Comfortable in a cloud environment, we’re serverless-first on Vercel and GCP (Cloud Run), containerised where it makes sense. * Experience with commerce, ERP, fulfilment, content or search systems is a strong plus. Having felt the pain of a bad integration is worth more than having read about the pattern. * Comfort reading a dbt model or a SQL query when you need to trace something is welcome. Deep data engineering experience is not required - the data team owns that. * A pragmatic mindset: you know when to move fast, when to simplify, and when to invest in foundations. * Strong communication, and the ability to explain trade-offs to non-technical stakeholders.