Graduate Software Engineer - Build Core APIs and Data Infra

Relay; Greater London; On-site; GBP 35,000 - 55,000; Full time

Job summary

Relay is seeking a Graduate Software Engineer to join our London team. You will define core API concepts, build courier-facing software to guide daily deliveries, and help establish our data infrastructure used for routing and operations research.

This role includes hands-on field learning to connect technology with real-world impact. Ideal candidates are final-year engineering students with internships or project experience, eager to learn, own their work, and collaborate effectively across

Qualifications

• Final year student with initial engineering experience through internships and academic projects.
• Curiosity and willingness to learn matter more than past exposure.
• High agency and pride of ownership in your work.

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 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.

Skills

Engineering internship experience

Education

Final year engineering student with internships

Tools

Various tech stacks

Job description

Relay is seeking a Graduate Software Engineer to join our London team. You will define core API concepts, build courier-facing software to guide daily deliveries, and help establish our data infrastructure used for routing and operations research.

This role includes hands-on field learning to connect technology with real-world impact. Ideal candidates are final-year engineering students with internships or project experience, eager to learn, own their work, and collaborate effectively across