Senior SWE

**Relay is fundamentally reshaping how goods move in an online era.** Backed by Europe’s largest-ever logistics Series A ($35M), led by deep-tech investors Plural (whose portfolio spans fusion energy and space exploration), Relay is scaling faster than 99.98% of venture-backed startups. We're assembling the most talent-dense team the logistics industry has ever seen **Relay’s Mission is** to **free commerce from friction**. Today, high delivery costs act as a hidden tax on e-commerce, quietly shaping what can be sold online and limiting who can participate. We envision a world where **more goods move more freely between more people**, making the online shopping experience seamless and accessible to everyone. **THE TEAM **• **~110 people**, more than **half** in engineering, product and data • **45+ advanced degrees** across computer science, mathematics and operations research • **Thousands** of data points captured, calculated, analysed and predicted for every single parcel we handle • An intellectually vibrant culture of **first‑principles thinking**, tight feedback loops and relentless experimentation **Work Alongside Industry Leaders** **Diego Protas – Director of Engineering** Diego, an expert in distributed systems and hardware architecture, merging physical computing with enterprise-scale infrastructure. Previously directing teams of 170+ engineers at Mercado Libre and orchestrating large-scale ML-based inference at Meta. At Relay, Diego’s infectious enthusiasm and hands-on leadership are redefining the boundaries of speed and reliability. **Tech Stack Highlights** * Python, Rust and TypeScript - we keep things simple but use the right tool for the job * Cross-platform Flutter apps with a deep focus on user experience * Cloud-native on GCP with extensive use of BigQuery and Cloud Run * Extensive use of ML modelling and LLM inference - no gimmicks here, this is our daily routine * Emerging tech integrations, including robotics and IoT-powered operations **The Opportunity** As a Software Engineer at Relay, you'll: * Own challenging, impactful problems end-to-end, from routing algorithms to real-time optimisation services and intuitive operational tools. * Collaborate closely with top engineers, data scientists, and product leaders in a highly autonomous and impact-driven environment. * Regularly ship production-quality code weekly—and often daily—seeing your work directly impact Relay’s growth. * Create incredible product experiences powering the fastest-growing e-commerce platforms, including Vinted, TikTok, and Temu, impacting millions of users worldwide. **Fast and Focused Hiring Process** 1. **Talent Acquisition Interview - 30 min** 2. **API Integration Interview - 1 hour** 3. **Technical Interview - 2 hours** 4. **Operating Principles & Impact - 1 hour** 5. **Decision and offer within 48 hours**; our process mirrors our pace of work, typically completed in a week. **Compensation, Benefits & Workplace** * **Generous equity, richer than 99% of European startups**, with **annual top-ups** to share Relay’s success. * **Private health & dental coverage**, so comprehensive you’d need to be a partner at a Magic Circle law firm to match it. * **25 days of holidays** * **Enhanced parental leave**. * **Located in Shoreditch,** our office set-up enables the kind of in-person interactions that drive impact. We work 4 days on-site, with 1 day remote. * **Hardware of your choice**. * **Extensive perks** (gym subsidies, cycle-to-work, Friday office lunch, covered Uber home and dinner for late nights, and more). **Who Thrives at Relay?** * **Aim with Precision:** You define problems clearly and measure your impact meticulously. * **Play to Win:** You chase bold bets, tackle the hard stuff, and view constraints as fuel, not friction. * **1% Better Every Day**: You believe that small, consistent improvements lead to exponential growth. You move quickly, deliver results, and learn from every experience. * **All In, All the Time**: You show up and step up. You take ownership from start to finish and do what it takes to deliver when it counts. * **People-Powered Greatness**: You invest in your teammates. You give and receive feedback with care and candour. You build trust through high standards and shared success. * **Grow the Whole Pie**: You seek out win-win solutions for merchants, couriers, and our customers, because when they thrive, so do we. If these resonate, and you combine strong technical fundamentals with entrepreneurial drive, let’s connect. _Relay is an **equal-opportunity employer** committed to diversity, inclusion, and fostering a workplace where everyone thrives._ Find more [English Speaking Jobs in United Kingdom](https://www.arbeitnow.co.uk/english-speaking-jobs) on Arbeitnow