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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Founding Engineer - **Company:** CENO LLC - **Location:** New York, NY, United States - **Experience:** Expert - **Salary:** $125,000.0 - $200,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Data Infrastructure, Event Logging, Financial Information EXchange, Python (Programming Language), PostgreSQL, Redis, TypeScript, Rust (Programming Language), Apex Code, State Machines, Backend, Production Code, Api Management, Golang - **Published:** July 31, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=1a205fe2e80f4802 ## About the Role * 5+ years building, shipping, and operating production backend systems. * Strong fluency in a modern backend language (Go, TypeScript, Python, Java, Rust) and data infrastructure (PostgreSQL, Redis, queues or event streaming). * A track record of designing systems that scale: clean service boundaries, thoughtful data models, and an instinct for what breaks under load. * Disciplined testing, observability, and incident response. You have been on call for a system where bugs cost money, data, or user trust. * Founder-stage temperament: comfort with ambiguity, urgency, and broad ownership. Strong nice-to-have * Fintech, brokerage, payments, or crypto-exchange experience, especially code that touched customer money, orders, or balances. * Broker or clearing integrations such as Interactive Brokers, Apex, DriveWealth, or Alpaca; FIX protocol or market-data experience. * Double-entry or event-sourced ledger design and reconciliation workflows. * Multi-currency cash management, FX, cross-border payments, or stablecoin settlement. * Experience in regulated or high-compliance environments; Korean or Japanese fluency or broker experience. Not the right fit * Engineers who want a spec handed to them. This role helps define how the infrastructure is built. * Engineers who treat correctness, auditability, and on-call ownership as someone else's job. Here the systems move real money. * People who want a narrow backend lane. The seat comes with broad ownership of critical regulated infrastructure. ## Description Ceno's brokerage is only as good as the systems that move customer money. This is a founding engineering role focused on backend and infrastructure, and it carries three of the company's hardest deliverables. * Stand up the production systems. Build the scalable systems that move customer money: partner-broker integrations, the trade lifecycle, the internal ledger, FX, and market data. * Architect with the CTO. Partner directly with the CTO on architecture and ship production code from week one. * Own it, don't wait for a spec. You will not be handed a spec; you will help define how the infrastructure is built. This is not a narrow backend role. It is a chance to own critical regulated infrastructure from the earliest days and help define how US investors access Asia. This is a founding engineering seat with real ownership from week one. What you will own * Partner-broker integrations. API integrations in the US and Korea, sandbox testing, and handling real-world spec drift. * The trade lifecycle. Order entry, routing, fills, cancellations, settlement, portfolio updates, and post-trade reconciliation. * The internal ledger. A double-entry ledger and reconciliation systems for cash, positions, FX conversions, and fees. * Audit-grade foundations. 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