Senior Backend Engineer, Marshmallow
New Products
ÂŁ90-122k
+ Bonus scheme (designed to reward and recognise high performance)
3 days a week in office
We’re building a huge technology company that helps make moving country easier.
Open for applications
We’re building a huge technology company that helps make moving country easier.
501-1000 employees
Open for applications
ÂŁ90-122k
+ Bonus scheme (designed to reward and recognise high performance)
3 days a week in office
501-1000 employees
Company mission
To back those who find themselves on a different path, either by choice or by circumstance, helping the exceptions to the rules that others aren’t interested in serving.
Role
Who you are
- This role requires autonomy, drive, curiosity and collaboration
- 6+ years of software engineering experience
- 2+ years hands-on experience with Java 8+ & Spring
- Experience with developing distributed systems
- Commercial awareness of AWS
- Commercial experience with Terraform
- You are a self-starter who likes to take ownership
- You are organised and can be relied upon to get things done
What the job involves
- This is a unique opportunity to make a large customer-centric impact working on a brand-new product offering for Marshmallow focused on solving a really key problem for our customer base
- We're looking for Engineers who can work well in ambiguity, work autonomously with a self-starter attitude and apply their excellent skills and experience to make sensible trade-offs
- You will be embedded in a completely new team within Marshmallow who will be close-knit, highly collaborative and impact focussed
- While the team is small and will work mostly independently, we support one another to get to the best outcomes and to build the right solutions
- Working in a new team launching a brand new product which will have a real impact on our customers’ lives
- Contribute to building solutions to ambiguous product problems with appropriate sense of urgency to deliver impact within the team
- Creates and promotes efficiency and speed within the team by autonomously solving problems, designing and implementing effective solutions
- Partners with stakeholders to understand requirements, build solutions, deliver functionality, write automation tests and build continuous delivery pipelines all the way through to deployment, monitoring and supporting these systems in production
- Help us evolve our architecture to optimise for product delivery speed
- Our Tech Stack
- Java 23
- Spring Boot
- AWS: (RDS, Fargate, S3, KMS, IAM, VPC, Kinesis, SQS, SNS)
- IaC with Terraform
- CI/CD with Teamcity
- Docker
- Observability with Datadog and Sentry
Application process
- We break it up into 3 stages:
- Initial video call with a Tech Talent Acquisition partner (30 mins)
- A behaviour culture and past experience interview with one of our engineering managers to check that your ways of working aligns with our processes, mission and values (1 hour)
- Tech interview with two members of our BE engineering team which is centred around systems design and technical questions (1 hour 30 minutes)
- We’ll let you know if you’re invited to an interview or not. But, as a small team with a lot of applications to consider, we can’t give individual feedback on each application
- To meet our regulatory obligations as an FCA-authorised financial services company, we need to do some background checks on all new hires. That means carrying out a DBS check and making sure you don't have any live criminal proceedings. Feel free to ask our Talent Acquisition team if you have any questions about this!
Salary benchmarks
Our take
For many ordinary people, insurance can be inaccessibly expensive. Marshmallow solves this problem by using data and technology to offer fairer access to products like insurance and financial support, starting with coverage for car and van owners.
Traditional providers often rely on broad population averages, meaning individuals are frequently overcharged based on age, nationality, or background. Marshmallow takes a different approach, leveraging proprietary tech to deliver personalise, more accurate quotes in minutes. This has led to better rates for customers and a surge of positive reviews and recognition since the company's launch.
Now operating as a fintech scale-up, Marshmallow is expanding its reach beyond just vehicle insurance. The company is also exploring areas like home insurance and wider financial services, with the aim of supporting those who are often left out of traditional systems. Having achieved unicorn status and doubled its profit since 2023, Marshmallow is well-positioned for this next chapter.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
Company
Employee endorsements
Open and honest communication
"At Marshmallow information is 'over-shared' and this starts from the CEOs and continues through the organisation. People across the business are..."
Funding (last 2 of 5 rounds)
Apr 2025
$90m
SERIES C
Sep 2021
$83m
SERIES B
Total funding: $208.2m
Company benefits
- Flexible working - Manage your own time flexibly. Just make sure your team is happy too.
- Ben benefits - Get your hands on your flexible benefits budget with the Ben Mastercard and spend it wherever you want.
- Competitive bonus scheme - designed to reward and recognise high performance 🌟
- Private healthcare - We want to support everyone’s wellbeing at Marshmallow, which is why we offer private healthcare insurance with Vitality.

- Cycle to work scheme - We’re registered under the Cycle-to-Work scheme, so you can buy a new bike tax-free. Lycra shorts optional.
- Mental wellbeing - We have partnered with Oliva to offer mental health support and make therapy sessions more accessible.
- Learning and training - Personal budgets for books and training courses to help you grow in your role. Weekly book clubs and learning sessions. Plus 2 days a year - on us! - to further your skillset.
- Company socials - We give all of our teams monthly budgets to get to know each other better outside of work. Plus we have company-wide socials every two weeks, themed parties, and more.
Company values
- We are relentless
- We are bold
- We are challenging
- We have no ego
Company HQ
Old Street, London, UK
Articles
Leadership
Oliver Kent-Braham
(Co-CEO)Previously worked in Growth & Partnerships at Yoti and Leveraged Finance at Investec. Previously founded Reel Money.
Alexander Kent-Braham
(Co-CEO)Previously worked in Product at Yoti. Also co-founded Reel Money and was an Analyst at hedge fund QCM.
People progressing
Joined as Software Engineer, being promoted to Technical Team Lead after 10 months and now Staff Engineer.
Diversity, Equity & Inclusion at Marshmallow
- To solve big problems, we need exceptional people from all walks of life. We're creating a culture where everyone feels empowered to bring their unique perspectives and boldest ideas to the table.
- Belonging - As a community, we foster an environment where everyone feels supported and safe to bring their authentic self to work.
- Recognition - We recognise and celebrate the differences in our experiences, understanding that our unique contributions help us collectively deliver our best work.
- Influence - We’re empowered to share our voice and have influence. We value diversity of thought, knowing we are better through our collective perspectives and experiences.
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