Senior Software Engineer

Java Backend Engineer - Greenfield Fintech | London (Hybrid)Multiple levels available: Associate to Senior LeadSalary: £90,000 - £140,000 + bonusLocation: London - on-siteBuild something that actually matters - from scratch.We're partnering with a high-growth fintech accelerator embedded within a major financial services organisation. They're not modernising legacy systems or patching old code. They're building brand-new consumer fintech products from the ground up, with serious investment, a significant product roadmap, and real engineering ownership from day one.This is a rare chance to join early, shape the architecture, and grow with the teams as they scale.The Tech Stack:• Java / Kotlin (JVM ecosystem)• Spring / Spring Boot• Microservices architecture• AWS / GCP cloud-native platforms• Docker & Kubernetes• Messaging & streaming systems (Kafka etc.)• Observability & distributed tracing toolingWhat You'll Be Doing:• Designing and building resilient, distributed systems at scale• Contributing to architectural direction across greenfield platforms• Writing clean, secure, production-ready code• Driving performance, reliability, and zero-downtime delivery• Working in close-knit, product-led squads alongside product managers and cross-functional engineering teams• At senior and lead levels - mentoring engineers and helping shape engineering culture as the organisation growsWhat We're Looking For:• Strong backend engineering experience in Java or Kotlin• Solid understanding of distributed systems, event-driven architecture, and cloud environments• A genuine sense of ownership - you care about what you ship• Comfortable in fast-moving, ambiguous environments where things are still being built• Collaborative, pragmatic, and focused on continuous improvementWhy This One Stands Out:• Greenfield builds - no legacy baggage, real product ownership• Backed by an established financial services organisation - startup pace with enterprise stability• Multiple levels available, so there's genuine room to grow• Hybrid working in London with a team that values engineering qualityInterested? Reach out to Joely at Synchro — we'd love to tell you more.