Back End Engineer

Closing date for applications: 29/10/2026

Location London, United Kingdom

Job typePermanent | Contract typeFull Time

Mostly Remote

You’ll spend most of your time at home, working with your team digitally. You’ll come into an office or hub at least twice a month to collaborate with your colleagues.

Managerial / Technical Lead

This is a general indication and doesn’t always reflect day-to-day responsibilities. Check the job description for full details.

#R-00286781

Power up what you do

This role is in Mettle

Mettle is for sole traders and limited companies with up to two owners (only one owner can access the account).

Job description

This role is based in the United Kingdom and as such all normal working days must be carried out in the United Kingdom.

Join us as a Back End Engineer

• This is an opportunity for a technically minded Software Engineer to join Mettle
• You'll be working with new and innovative technology to deliver high impact solutions
• Hone your existing software engineering skills and advance your career in this critical role

What you'll do

You’ll join one of the core cross-functional mission teams to build and develop Mettle. We will look to you to develop clean, elegant and reusable code that is well-tested and easy to maintain and extend.

You’ll also:

• Work with stakeholders across the business to drive the direction of Mettle Engineering and put the long-term interests of customers at the heart of key decisions
• Collaborate across our backend chapter to uphold standards, best practices and to promote innovation
• Work collaboratively with the team to resolve technical issues
• Support and oversee junior engineers and act as a subject matter expert

The skills you'll need

You’ll need a strong background in software engineering, software design or database design and architecture. You should have solid practical and theoretical knowledge of Java software development as well as strong experience of Spring Boot / Micronaut.

You’ll also need:

• An understanding of Kubernetes / Docker
• An excellent understanding of AWS deployment and configuration
• Experience working with message-driven architectures / Kafka / event sourcing
• Experience working on a highly secure application
• An understanding on how to translate business objectives into data driven insight

Your benefits breakdown

Here’s a quick look at what your pay package and annual leave could look like if you get accepted for the role. We have a wide range of benefits to support you in your working life and beyond.

Tap each segment for details.

Your pay package

100% Base pay This is your base pay package that you take home every month.

+10% Pension funding This is monthly funding paid towards your pension.

up to +10% Benefit funding This is monthly funding paid towards a range of benefits you can choose from.

Your leave allowance

30 days Annual leave You’ll also have the opportunity to purchase up to 5 additional days off.

3 days Volunteering Take time off to support the causes you’re passionate about.

3 days Training Take time to build the skills you need to grow your career.

Total rewards package

Welcome to our Bishopsgate hub

Based only a few minutes’ walk from Liverpool Street Station, the central location of this office makes working there incredibly convenient. Everything you need is close by, so you can run errands, go to the gym, and socialise with friends and colleagues before and after work.

Bishopsgate recently underwent a multi-year refurbishment programme to improve spaces and facilities as well as become more sustainable.

Our tech stack

Here’s just some of the technologies we use.

Front end

• JavaScript
• ReactJS
• AngularJS

Back end

• Python
• Java
• Microsoft Dynamics

DevOps

• AWS
• GitLab
• Google Cloud Platform

Data

• Kafka
• Hadoop
• PostgreSQL
• Snowflake