Java Backend Engineer - Greenfield Fintech | London (Hybrid)
Multiple levels available: Associate to Senior Lead
Salary: £90,000 - £140,000 + bonus
Location: London - on-site
Build something that actually matters - from scratch.
Were partnering with a high-growth fintech accelerator embedded within a major financial services organisation. Theyre not modernising legacy systems or patching old code. Theyre 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 tooling
What Youll 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 grows
What Were 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 improvement
Why 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 theres genuine room to grow
• Hybrid working in London with a team that values engineering quality
Interested? Reach out to Joely at Synchro — wed love to tell you more.