Back End Engineer - FinTech​/SaaS

Back End
Engineer - Rapid

- growth
Fin Tech /
SaaS
- London /
Hybrid /
UK Remote
- up to £120k (DoE)

We have an incredible opportunity for skilled, passionate and experienced Back End Engineers, with strong production experience with languages such as Node.js, Express, Python; strong familiarity with AWS (e.g. ECS/EKS, Lambda, SQS, Event Bridge, RDS/Dynamo

DB, S3) and experience designing RESTful and event-driven APIs, to join a fantastic Fin Tech / SaaS on a hybrid or remote working basis as soon as possible.

The Opportunity:

This is the perfect opportunity to join an immediately successful Fin Tech startup, in a crucial role that is critical to the product’s success and the company’s future, and will allow you to have full-cycle involvement in the platform creation.

The Back End Engineer will need to have a passion for performance, a growth mindset and the drive to continuously learn, develop and improve. Our client encourages a learning culture and they embrace cutting‑edge technology which will allow you to hone relevant, in-demand skills.

They are a rapidly scaling company, so this is a prime opportunity to get your foot in the door and join a dynamic, high-performance team on an exciting trajectory!

Our client is offering an annual salary up to £120k, dependent on experience and skillset.

What we’re looking for:

• Proven production experience building and operating backend services (e.g. Node.js/Express, Python), with a technology‑agnostic mindset and the ability to adapt to evolving stacks
• Strong familiarity with AWS (i.e. ECS/EKS, Lambda, SQS, Event Bridge, RDS/Dynamo
  
  DB, S3)
• Experience designing RESTful and event‑driven APIs
• Strong relational data modelling skills (financial or transactional systems advantageous)
• Experience with concurrency, locking, idempotency and distributed consistency
• Experience with message queues, background workers and workflow orchestration
• Experience integrating AI/ML or decisioning services into backend platforms
• Comfortable building systems that consume AI outputs and execute deterministic actions
• Ability to design safety, audit and rollback mechanisms around automated execution
• Understanding of the role context plays in designing a modern AI‑native system
• Hands‑on experience deploying and operating Node.js services on AWS
• Experience with CI/CD, infrastructure-as-code and containerised workloads
• Drive to improve as an Engineer – eager to work with peers who push and support each other to continuously improve
• Experience working in a Fin Tech / SaaS organisation is highly advantageous
• Strong communication skills and the ability to liaise at all levels
• Collaborative nature – ability to work independently and as part of a team
• Ability and desire to work in a fast‑paced, rapid‑growth environment
• Highly ambitious, driven and focused

Interested in this fantastic Back End Engineer opportunity?

If this role is of interest to you and you have the passion, skills, knowledge and expertise we’re looking for, we’d love to hear from you!

Please ensure your CV showcases your expertise and submit it as soon as possible, quoting 'AE – Back End Engineer – SaaS’