---
title: "Senior Software Engineer"
company: "Relay Technologies"
company_url: "https://www.remjobs.works/companies/relay-technologies"
url: "https://www.remjobs.works/job/relay-technologies-senior-software-engineer-d6939c07-3149-4ad2-bcd0-aad182f8fe47"
apply_url: "https://jobs.ashbyhq.com/relay/f9a3f214-5943-4778-94ec-797f025ff572"
workplace: hybrid
location: "London - Hybrid"
employment_type: full-time
seniority: senior
role: software-engineering
region: united-kingdom
skills: ["gcp", "llm", "python", "rust", "typescript"]
date_posted: 2026-08-28T14:02:59.232Z
first_seen_by_remjobs: 2026-09-17T11:40:31.946Z
---

# Senior Software Engineer

**Relay Technologies** · London - Hybrid

Apply: https://jobs.ashbyhq.com/relay/f9a3f214-5943-4778-94ec-797f025ff572

## About the role

**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), 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**

- 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.*

---

Source: Relay Technologies's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/relay-technologies-senior-software-engineer-d6939c07-3149-4ad2-bcd0-aad182f8fe47