Posted 12 August, 2026
Backend Engineer
Carousel Consultancy
London, ENG, GB
Full Time
Job Description
BackendEngineer – Rapid–growthFinTech / SaaS – London / Hybrid / UK Remote – up to 140k (DoE)We have an incredible opportunity for skilled, passionate and experienced Backend Engineers,with strong production experience with languages such as Node.js, Express, Python; strong familiarity with AWS (e.g. ECS/EKS, Lambda, SQS, EventBridge, RDS/DynamoDB, S3) and experience designing RESTful and event-driven APIs, to join a fantastic FinTech / SaaS on a hybrid or remote working basis as soon as possible.The Opportunity: This is the perfect opportunity to join an immediately successful FinTech startup, founded by ex-Revolut employees, in a 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 Backend 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 140k, 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 stacksStrong familiarity with AWS (i.e. ECS/EKS, Lambda, SQS, EventBridge, RDS/DynamoDB, S3)Experience designing RESTful and event-driven APIsStrong relational data modelling skills (financial or transactional systems advantageous)Experience with concurrency, locking, idempotency and distributed consistencyExperience with message queues, background workers and workflow orchestrationExperience integrating AI/ML or decisioning services into backend platformsComfortable building systems that consume AI outputs and execute deterministic actionsAbility to design safety, audit and rollback mechanisms around automated executionUnderstanding of the role context plays in designing a modern AI-native systemHands-on experience deploying and operating Node.js services on AWSExperience with CI/CD, infrastructure-as-code and containerised workloadsDrive to improve as an Engineer – eager to work with peers who push and support each other to continuously improveExperience working in a FinTech / SaaS organisation is highly advantageousStrong communication skills and the ability to liaise at all levelsCollaborative nature – ability to work independently and as part of a teamAbility and desire to work in a fast-paced, rapid-growth environmentHighly ambitious, driven and focusedInterested in this fantastic Backend 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 – Backend Engineer – SaaS’Follow us on LinkedIn.
