Senior Software Engineer (London)

Opencoreos

United Kingdom Remote permanent

Posted: November 25, 2025

Required Skills

Job Description

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.

Why Apply Through MisuJob?

AI-Powered Job Matching: MisuJob uses advanced artificial intelligence to analyze your skills, experience, and career goals. Our matching algorithm compares your profile against thousands of job requirements to find positions where you have the highest chance of success. This saves you hours of manual job searching and ensures you only see relevant opportunities.

One-Click Applications: Once you create your profile, applying to jobs is effortless. Your resume and cover letter are automatically tailored to highlight the most relevant experience for each position. You can apply to multiple jobs in minutes, not hours.

Career Intelligence: Beyond job matching, MisuJob provides valuable career insights. See how your skills compare to market demands, identify skill gaps to address, and understand salary benchmarks for your experience level. Make data-driven decisions about your career path.

Frequently Asked Questions

How do I apply for this position?

Click the "Register to Apply" button above to create a free MisuJob account. Once registered, you can apply with one click and track your application status in your dashboard.

Is MisuJob free for job seekers?

Yes, MisuJob is completely free for job seekers. Create your profile, get matched with jobs, and apply without any cost. We help you find your dream job without any hidden fees.

How does AI matching work?

Our AI analyzes your resume, skills, and experience to understand your professional profile. It then compares this against job requirements using natural language processing to calculate a match percentage. Higher matches mean better fit for the role.

Can I apply to jobs in other countries?

Absolutely. MisuJob features jobs from companies worldwide, including remote positions. Filter by location or look for remote opportunities to find jobs that match your preferences.

Ready to Apply?

Join thousands of job seekers using MisuJob's AI to find and apply to their dream jobs automatically.