Mid & Senior Backend Engineers | Python, TypeScript, AI | High-Growth US FinTech Scale-Up | New London Team | 5 Days On-Site | Visa Sponsorship | Up to £130k + Equity
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Mid & Senior Backend Engineers | Python, TypeScript, AI | High-Growth US FinTech Scale-Up | New London Team | 5 Days On-Site | Visa Sponsorship | Up to £130k + Equity
The Company
We’re partnering with a commercially successful, rapidly growing technology company building sophisticated AI-powered software for global enterprise customers.
Its platform helps organisations complete complex, business-critical work more quickly and accurately by combining modern AI capabilities, proprietary data and intelligent automation.
The company has already achieved significant commercial traction and is now investing heavily in its engineering function. You’ll join at a stage where you can meaningfully influence the product, technical architecture and engineering culture while building systems used daily by demanding, paying customers.
The Role | Mid & Senior Backend Engineers | Python, TypeScript, AI | High-Growth US FinTech Scale-Up | New London Team | 5 Days On-Site | Visa Sponsorship | Up to £130k + Equity
You’ll build and scale backend systems supporting the company’s customer-facing products and wider internal operations.
This is a systems-focused role for an engineer who enjoys thinking about data flows, performance, reliability and the way different technologies work together.
You’ll take ownership of technically challenging projects from initial discovery and architecture through to production, working closely with product, engineering and commercial stakeholders.
What You’ll Be Doing
Designing and building scalable backend services
Improving the performance and reliability of data-intensive systems
Developing APIs, integrations and automated workflows
Building internal platforms that help teams operate more efficiently
Designing reliable data models and processing pipelines
Integrating third-party technologies into production systems
Taking technical projects from initial concept through to production
Improving engineering practices as the platform and team scale
Contributing to architectural and infrastructure decisions
Tech Stack | Mid & Senior Backend Engineers | Python, TypeScript, AI | High-Growth US FinTech Scale-Up | New London Team | 5 Days On-Site | Visa Sponsorship | Up to £130k + Equity
Python and/or TypeScript
PostgreSQL
Modern cloud infrastructure
APIs and integrations
Distributed systems
Data processing and workflow automation
AI-enabled product infrastructure
You don’t need experience with every technology listed, but you should be comfortable learning quickly and making pragmatic technical decisions.
What They’re Looking For
Strong backend software engineering experience
Production experience with Python or TypeScript
Experience owning technical projects end-to-end
Strong knowledge of PostgreSQL, data modelling and system design
Comfortable building APIs, integrations and internal tooling
Experience translating complicated problems into clean technical systems
A strong understanding of reliability, performance and engineering quality
Comfortable working in a fast-moving technology environment
A collaborative approach and clear communication style
Based in or able to commute regularly to London
Nice to have:
Experience building data-intensive products
Internal platform or developer-tooling experience
Knowledge of data pipelines and workflow orchestration
Experience with event-driven or distributed systems
Exposure to production AI or machine-learning systems
Experience integrating several external services into a cohesive platform
Why Join | Mid & Senior Backend Engineers | Python, TypeScript, AI | High-Growth US FinTech Scale-Up | New London Team | 5 Days On-Site | Visa Sponsorship | Up to £130k + Equity
Join a commercially successful technology company experiencing significant growth
Build complex systems used by major enterprise customers
Work on modern AI, data and backend-engineering challenges
Take meaningful ownership from architecture through to production
Join a growing engineering function at an influential stage
Work closely with highly technical founders and senior engineers
Influence the architecture, product and engineering culture
Receive a competitive salary, equity and comprehensive benefits
If you’re a Backend or Full stack engineer who enjoys building complex systems, improving how businesses operate and working with modern AI and data infrastructure, we’d love to hear from you. Apply with your CV and we’ll be in touch if there’s alignment.