Senior Backend Engineer

4 days ago

London, Greater London, United Kingdom Open Select Full time
 

Senior Backend Engineer



Location: London (Hybrid)
Salary: Up to £130k + competitive equity
Industry: Fintech, SaaS, B2B 

What You'll Drive

Join a fast-growing fintech scaleup revolutionising billing, CPQ, and revenue recognition for the world's leading SaaS, AI, and fintech companies. Backed by a16z, Salesforce Ventures, and top global fintech investors, over $21M has been raised to date, fueling new product development, team growth, and international expansion. 



With hundreds of clients and over $500M in revenue processed, you'll build mission-critical financial tools, architect core backend systems, and help shape both product and engineering culture at a pivotal moment of growth.

What You'll Focus On

Design, build, and optimise scalable backend services using Kotlin for complex billing and revenue automation workflows

Collaborate with product, data, and design teams to deliver seamless, user-friendly financial tooling

Architect robust APIs and data models with best practices for high performance and reliability

Drive backend technical direction and mentor engineering peers

Contribute to building a strong engineering culture and operational excellence in a high-growth startup environment

Who You Are

3+years of backend or full-stack engineering experience building product-focused applications

Strong proficiency in Kotlin or equivalent JVM languages

Proven experience designing scalable, reliable backend systems in SaaS or fintech settings

Comfortable working in a hybrid environment with regular presence in London

Autonomous, collaborative, and passionate about solving complex infrastructure challenges

Experienced in fast-paced, user-centric startup or scaleup environments

Tech Stack

Kotlin

Why You'll Thrive Here

Explosive growth: 600%+ YoY revenue increase, multimillion-dollar funding, and global customer reach

High ownership: Shape product and engineering strategy with immediate impact

Experienced team: Engineers and leaders from top-tier fintech and SaaS companies

Product and user focus: Build automation and financial tools that transform how leading companies operate

Flexible and inclusive culture: Results-driven, hybrid work, direct leadership access

Fast career progression: Opportunities for technical leadership and broad ownership

Security and compliance: Work in SOC 2 and ISO 27001 certified environments, gaining deep domain expertise



This role is open to UK citizens only.

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