Graduate Software Engineer

EngRadar; Harrow; Hybrid; GBP 32,000 - 52,000; Full time

Job summary

Relay is seeking a Graduate Software Engineer in London, with a hybrid work setup and an emphasis on rapid delivery of features. You will work across cloud, backend, and frontend domains while collaborating with a high-caliber engineering team.

You will define API concepts, build courier-facing software to guide thousands of parcel deliveries, and help establish the data infrastructure that powers routing and operations research.

Qualifications

• Final year student with internships and academic projects in engineering.
• Willingness to learn and take ownership across cloud, backend and frontend work.
• You value clear communication and teamwork, with empathy for users.

Responsibilities

• Define and implement the core concepts of our API.
• Build the first versions of our courier-facing software to guide the delivery of thousands of parcels every day.
• Help stand up our data infrastructure stack, the basis of routing, topology management, and other core operations research tasks.
• Regularly spend time in the field learning how the technology you build impacts our couriers and parcel recipients.

Skills

Communication

Ownership

Curiosity

Education

Final year student in a relevant field

Tools

Python

Rust

TypeScript

Flutter

GCP

BigQuery

Cloud Run

ML modelling

LLM inference

Robotics

IoT

Job description

Graduate Software Engineer

London - Hybrid Full-time

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 Platform 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

As a Graduate Software Engineer At Relay, You Will

• Define and implement the core concepts of our API.
• Build the first versions of our courier‑facing software to guide the delivery of thousands of parcels every day.
• Help stand up our data infrastructure stack, the basis of our routing, topology management, and other core operations research tasks.
• Regularly spend time in the field learning how the technology you build impacts our couriers and parcel recipients.

You Might Be a Great Fit If…

• You are a final year university student with initial engineering experience through internships and academic projects.
• You’re excited to take on any engineering challenge from cloud infrastructure to frontend development. Curiosity and willingness to learn matter more than past exposure.
• You have high agency and pride of ownership in your work, taking initiative to drive impact.
• You demonstrate empathy for the humans you build for, seeking feedback from customers, partners, and colleagues.
• You are eager to learn new technologies and problem domains.
• You value clear communication, active listening, and intentional collaboration.

We Are Looking for Candidates Who…

• Are ready to join us in Summer 2026 and able to work in our London office 4 days a week.
• Have worked on high‑performing teams building software.
• Have broad experience across a variety of technology stacks.

Fast and Focused Hiring Process

• Talent Acquisition Interview - 30 min
• Programming Interview - 1 hour
• API Integration Interview - 1 hour
• Operating Principles & Impact - 1 hour
• 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.

Relay is an equal‑opportunity employer committed to diversity, inclusion, and fostering a workplace where everyone thrives.

Posted by Relay on their own careers page — no recruiter in between.