Job Overview
Location
London
Job Type
Full-time
Category
Software Engineering
Date Posted
May 28, 2026
Full Job Description
📋 Description
- • Senior Software Engineer role focused on building the AI-powered revenue platform that processes over $1bn in annual invoice volume for high-growth B2B companies.
- • Day-to-day responsibilities include owning revenue-critical event infrastructure, designing scalable data systems using event streaming architectures, shaping backend architecture with Kotlin and Spring Boot, and building systems that scale to 10x load while ensuring data accuracy and reliability.
- • Join a lean, fast-growing engineering team in London and New York where you’ll have real ownership, direct customer access, and influence over architectural decisions in a company scaling rapidly after a $20M Series A.
- • Opportunity to solve complex technical challenges in billing infrastructure, make impactful architectural decisions, and grow your expertise in high-throughput, low-latency systems while working on product that finance teams love using.
🎯 Requirements
- • Experience shipping production backend systems with focus on reliability over just 'it works'
- • Strong background in event-driven architectures including pub/sub systems, event streaming platforms, and understanding of delivery semantics, backpressure, and ordering guarantees
- • Experience with analytical databases or OLAP systems, including columnar storage, indexing strategies, and query optimization
- • Proven ability to provision cloud resources, write infrastructure-as-code (Terraform), and make cost-optimized architectural decisions at scale
- • Comfort with ambiguity, ownership mindset, and ability to thrive in early ideation stages while adapting based on feedback
- • Clear communication skills and customer-centric mindset — wanting to understand the 'why' behind what you build
🏖️ Benefits
- • Competitive salary range of £115,000 - £130,000
- • Meaningful share options (equity)
- • 25 days holiday plus bank holidays
- • Modern, flexible pension via Penfold with salary sacrifice available
- • Visa sponsorship available
- • Hybrid work model: three days in office per week in London/New York with team lunches on Wednesdays and bi-annual offsites
Skills & Technologies
See exactly how your profile matches this role — strengths, skill gaps, and what to do about them.
About Sequence
Sequence is a leading platform that empowers businesses to build and launch sophisticated applications on the blockchain. It provides a comprehensive suite of tools and services, including a decentralized identity solution, smart contract development environment, and a robust infrastructure for managing digital assets. Sequence caters to a wide range of industries, from gaming and DeFi to supply chain and digital collectibles, enabling seamless integration of blockchain technology into existing business models. The company focuses on simplifying the complexities of Web3 development, making it accessible for both developers and end-users. Their mission is to accelerate the adoption of decentralized technologies by providing a user-friendly and scalable ecosystem.
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