Senior Mobile Engineer

Job description

**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, and a recently closed Series B ($60M), Relay is scaling faster than 99% 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**• **~160 people**, around 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** - Cross-platform Flutter apps with a deep focus on user experience - Python, Rust and TypeScript - we keep things simple but use the right tool for the job - 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 **What you'll do** - Work across the full stack of technology, from mobile all the way down through data infrastructure. - Take end-to-end ownership over thorny real-world problems, like using machine vision to automatically assess proof of delivery photos. - Collaborate with team members across the company. - Regularly spend time in the field learning how the technology you build impacts our couriers and parcel recipients. **Fast and Focused Hiring Process** 1. **Talent Acquisition Interview - 30 min** 2. **Build a UI Component Interview - 1 hour** 3. **Design and Mobile Fundamentals Interview + AI Programming (Build an APP) - 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. **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.*