Relay Technologies
Graduate Software Engineer
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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
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The Opportunity
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.
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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.
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Jessica, London
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