Senior Backend Engineer

Understanding Recruitment; Greater London; Hybrid; GBP 89,000 - 105,000; Full time

Job summary

A leading recruitment firm is seeking a Senior Backend Engineer for an innovative AI infrastructure company based in London. The role involves developing new product features using Kotlin and Java, within a flexible and collaborative environment. Ideal candidates will have experience in startup settings, and possess a Bachelor's in Computer Science from a Russell Group university. Competitive salary of up to £105k plus bonuses and equity is offered.

Benefits

Flexible work hours

Bonus

Share options

Personal development budget

Private healthcare, dental and eye care

Drinks and snacks provided in office

Collaborative social team

Qualifications

• Experience in a fast-paced, product-focused startup environment.
• Proficient in Kotlin and possibly Java.
• Understanding of Spring Boot frameworks.

Responsibilities

• Build new product features and improve scalability.
• Help define technical direction within the engineering team.

Skills

Kotlin

Java

Spring Boot

Start‑up experience

Product-focused tech companies

Education

BSc in Computer Science or STEM subject from Russell Group university

Job description

Senior Backend Engineer – AI transforming the future

Location: Hybrid in London approx. 1-2 days a week (flexible work hours)

Compensation: Up to £105k + bonus + equity

We are very excited to have just partnered with a rapidly rising AI infrastructure company that’s transforming how development and QA teams create, manage, and test high-quality data at speed and scale.

They’ve built the first API-driven data generation platform that enables organisations to generate better-than-production test data in minutes, without the never-ending manual work or compliance risks.

Having just received their Series A funding, they’re hiring Senior Backend Engineers with Kotlin (or a combination of Java & Kotlin experience) to build new product features, improve performance and scalability, and help define technical direction within a growing engineering team.

Qualifications

• Start‑up or scale‑up experience
• BSc in Computer Science or STEM subject from Russell Group university
• Have worked in product‑focused tech companies
• Kotlin
• Can also have worked with Java
• Spring Boot

Benefits

• Flexible work hours
• Bonus
• Share options
• Personal development budget
• Private healthcare, dental and eye care
• Drinks and snacks provided in office
• Collaborate social team, working & learning from very smart engineers

Currently with a team across Europe, they are looking to expand their London team and build a close‑knit team, combining collaborative face‑to‑face working with the flexibility of working from home.

They provide a highly flexible, trusting, and supportive environment where engineers are empowered to take ownership. As strong advocates for equality, they are committed to fostering an inclusive culture that promotes fairness, diverse perspectives, and equal opportunities at every level.

Apply

If you have worked with Kotlin in a fast‑paced, product‑focused startup environment, apply now for this fantastic Senior Backend Engineer opportunity!