Back End Engineer - FinTech / SaaS in London
Back End Engineer - FinTech / SaaS

Back End Engineer - FinTech / SaaS in London

London Full-Time 72000 - 84000 £ / year (est.) Home office (partial)
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At a Glance

  • Tasks: Join a dynamic team to build and operate backend services using cutting-edge technologies.
  • Company: Exciting FinTech startup with a focus on innovation and growth.
  • Benefits: Competitive salary up to £120k, hybrid/remote work, and a culture of continuous learning.
  • Why this job: Make a real impact in a rapidly growing company while honing your tech skills.
  • Qualifications: Experience with Node.js, Python, AWS, and designing APIs is essential.
  • Other info: Fast-paced environment with excellent career advancement opportunities.

The predicted salary is between 72000 - 84000 £ per year.

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, 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, 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!

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, EventBridge, RDS/DynamoDB, 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 FinTech / 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

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.

Back End Engineer - FinTech / SaaS in London employer: Carousel Consultancy Ltd

Join a rapidly growing FinTech/SaaS company in London that values innovation and employee development. With a strong emphasis on a collaborative work culture, you will have the opportunity to work with cutting-edge technology while enjoying flexible hybrid or remote working arrangements. The company fosters a learning environment, providing ample growth opportunities for engineers eager to enhance their skills and contribute to impactful projects.
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Contact Detail:

Carousel Consultancy Ltd Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Back End Engineer - FinTech / SaaS in London

✨Network Like a Pro

Get out there and connect with people in the FinTech and SaaS space! Attend meetups, webinars, or even just grab a coffee with someone in the industry. You never know who might have the inside scoop on job openings or can put in a good word for you.

✨Show Off Your Skills

Don’t just talk about your experience; show it! Create a portfolio or GitHub repository showcasing your projects, especially those using Node.js, Python, or AWS. This gives potential employers a tangible look at what you can do and sets you apart from the crowd.

✨Ace the Interview

Prepare for technical interviews by brushing up on your coding skills and understanding of backend systems. Practice common interview questions related to RESTful APIs and AWS services. Remember, confidence is key, so don’t hesitate to showcase your passion for performance and growth!

✨Apply Through Our Website

If you’re keen on this Back End Engineer role, make sure to apply through our website! It’s the best way to ensure your application gets noticed. Plus, we love seeing candidates who are proactive and eager to join our dynamic team!

We think you need these skills to ace Back End Engineer - FinTech / SaaS in London

Node.js
Express
Python
AWS (ECS/EKS, Lambda, SQS, EventBridge, RDS/DynamoDB, S3)
RESTful API design
Event-driven API design
Relational data modelling
Concurrency management
Message queues
Background workers
Workflow orchestration
AI/ML integration
CI/CD
Infrastructure-as-code
Containerised workloads
Strong communication skills

Some tips for your application 🫡

Showcase Your Skills: Make sure your CV highlights your experience with Node.js, Express, and Python. We want to see your strong production experience, so don’t hold back on those details!

Tailor Your Application: Customise your application to reflect the job description. Mention your familiarity with AWS services and your experience designing RESTful APIs. This helps us see how you fit into our team!

Keep It Clear and Concise: We appreciate clarity! Use bullet points for your skills and experiences to make it easy for us to read. A well-structured CV can really make a difference.

Apply Through Our Website: Don’t forget to submit your application through our website! It’s the best way for us to receive your CV and get you in the running for this exciting opportunity.

How to prepare for a job interview at Carousel Consultancy Ltd

✨Know Your Tech Stack

Make sure you’re well-versed in the technologies mentioned in the job description, like Node.js, Express, and Python. Brush up on your AWS knowledge too, especially ECS, Lambda, and S3, as these are crucial for the role.

✨Showcase Your Problem-Solving Skills

Be prepared to discuss specific challenges you've faced in previous roles, particularly around designing RESTful APIs or working with message queues. Use examples that highlight your ability to think critically and adapt to new tech stacks.

✨Demonstrate a Growth Mindset

This company values continuous learning, so share instances where you’ve taken the initiative to learn new skills or improve existing ones. Talk about how you stay updated with industry trends, especially in FinTech and SaaS.

✨Ask Insightful Questions

Prepare thoughtful questions about the company's tech culture, their approach to AI/ML integration, and how they support engineers in their growth. This shows your genuine interest in the role and helps you assess if it’s the right fit for you.

Back End Engineer - FinTech / SaaS in London
Carousel Consultancy Ltd
Location: London

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