Senior Software Engineer

London - HybridHybridfull-timesenior

Software EngineerSoftware Engineering

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Quick Summary

Overview

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 ($95M),

Technical Tools

Software EngineerSoftware 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.

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

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.

What We Offer

~1 min read

✓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.