About OpenCoreOS
• We're building the first open-source "Thin Ledger", designed to replace legacy core systems with a Golang-based, Protobuf-defined, event-driven platform powered by Kafka, Redis, and multi-region CockroachDB/YugabyteDB.
• Our platform is AI-native from the ground up: autonomous SRE agents, AI-generated runbooks, and everything-as-code—from policies to infrastructure definitions.
• We're mission-critical by default, targeting five-nines uptime and multi-region failover for regulated institutions.
• We work openly and fast, and colocate in Huckletree, Liverpool St, London for in-person collaboration, supported by async-friendly workflows.
What You Will Work On
Ledger Engine: Deterministic, event-sourced transaction engine.
Interest & Pricing Engine: High-precision financial calculations.
Reconciliation Engine: Invariants, controls, and cross-ledger consistency.
Operational Data Store (ODS): Real-time operational data plane.
Scalability Layer: Concurrency, throughput, partitioning, and replication.
AI-Native Dev Experience: MCP servers, agent workflows, and automated runbooks.
Core Responsibilities
Build early MVPs for Tier-1 banks.
Architect distributed systems with Go, Kafka, and distributed SQL DBs.
Own systems across the full SDLC (coding, testing, DevOps, infra, product shaping).
Implement advanced CI/CD and testing automation.
Essential Skills
Language: Go
Kafka / Event-driven systems
Distributed systems, concurrency, and invariants
GitOps
Strong debugging, testing, and production ownership
AI-Native Workflow: LLMs required daily
Nice-to-Haves
Fintech/Banking experience
Oncall / High-availability systems experience
Multi-region systems exposure
Benefits Overview:
4 Weeks of PTO
Medical & Dental Insurance
Eligible for Sign on Bonus
Pension
Paid National Holidays
Annual Bonus Eligibility
Why join us?
• Massive impact: Transform how T1 banks handle billions of transactions daily—on a truly open platform.
• High-caliber team: Join a small team of exceptional engineers who value both speed and stability.
• AI-native workspace: Experience an AI-first environment with LLMs integrated into every tool.
Top Skills
OpenCoreOS London, England Office
London, United Kingdom
