Junior Backend Engineer

meet Dex; City of London; On-site; GBP 40,000 - 60,000; Full time

Job summary

A stealth-mode technology company in London is seeking an Associate to design and maintain backend infrastructure for cloud-driven SaaS products. The role offers mentorship, competitive salaries, and equity options, while fostering a collaborative environment. Candidates should have around 2 years of experience and a solid background in software development. This position is vital as the team shapes the product from its inception.

Benefits

Competitive salary

Equity options

Private healthcare

Hands-on mentorship

Qualifications

• Circa 2 years of commercial experience in backend services for cloud-driven SaaS.
• Familiarity with modern backend languages such as Go, Python, Java, C++, or Rust.
• Strong problem-solving skills suited for fast-paced environments.

Responsibilities

• Design and implement scalable, high-performance backend infrastructure.
• Build and maintain cloud infrastructure using modern tools.
• Collaborate with product designers and engineers to deliver new features.

Skills

Backend services building

Cloud infrastructure maintenance

Problem-solving

Communication and collaboration

Education

Degree in Computer Science or STEM

Tools

Docker

AWS

PostgreSQL

DynamoDB

Job description

This range is provided by Dex. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Operations at Dex | Helping Find Work You'll Love

This role is with one of Dex’s trusted Partner companies. We work closely with their teams to truly understand their culture, goals, and what they’re looking for, so we can match you with the right opportunity for your goals!

The Team

This is a rare opportunity to join a well-funded, stealth‑mode technology company at its inception. Backed by a founding team with a proven track record, whose previous companies have been collectively acquired for billions, they are building a disruptive, innovative product from the ground up. As an early member of this small, hands‑on team, you will be part of a complete greenfield opportunity, shaping the product roadmap from day one.

What you’ll do

• Design and implement scalable, high‑performance backend infrastructure, services, and APIs.
• Build and maintain cloud infrastructure using modern tools like Docker, AWS (including S3 and IoT), and Infrastructure as Code (e.g., CDK, Terraform).
• Work across a variety of data stores and services, including relational databases (PostgreSQL), NoSQL (DynamoDB), and search (OpenSearch).
• Develop event‑driven architectures, manage third‑party API integrations, and implement real‑time features with WebSockets.
• Collaborate closely with product designers and senior engineers to define, own, and deliver new features against tight milestones.
• Optimize code for performance, scalability, and maintainability, contributing to a culture of continuous improvement.

What you’ll bring

• Circa 2 years of commercial or equivalent experience building and maintaining backend services and infrastructure for cloud‑driven SaaS products.
• Familiarity with modern backend languages such as Go, Python, Java, C++, or Rust (a specific language is not required).
• A solid academic background (e.g., Computer Science or STEM) or a clear, demonstrated passion for software development and technology.
• Strong problem‑solving skills and the ability to learn and adapt quickly in a fast‑paced, ambiguous startup environment.
• Excellent communication and collaboration abilities.
• Full‑stack experience (e.g., React, Vue) is a plus, but not required.

What’s on offer

This role is specifically designed to accelerate your career. You will join a high‑trust, low‑ego environment with a deep commitment to early‑career growth, benefiting from direct, hands‑on mentorship and regular pairing with senior engineers who have built products at scale. As a foundational team member, your ideas will directly influence the product. The package includes a competitive salary, significant equity options, and private healthcare. The team fosters a collaborative, in‑person culture (4‑5 days/week in their London office) to drive rapid ideation and learning.

If you’re interested, apply here to head to the website, where you can sign up and speak to Dex. After your call, you’ll be sent the full match details. We’ll help manage your applications, and find other great matches to work you'll love.

Seniority level: Associate

Employment type: Full‑time

Job function: Engineering and Information Technology

Industries: Technology, Information and Internet