Senior Node.js EngineerApply for this jobLocationLima, PeruDepartmentEngineeringJob TypeFull-Time## DescriptionWe’re looking for a Senior Node.js Engineer to own, maintain, and scale mission-critical, production-grade fintech and banking applications. In this role, you will be responsible for shipping robust backend services, managing complex ledger systems, and handling high-stakes financial data pipelines where data integrity and production discipline are non-negotiable. Operating as a senior technical contributor, you will thrive in an environment that values deep technical ownership, elegant backend engineering over hype, and a meticulous approach to financial system architecture.## ResponsibilitiesYou’ll work closely with internal stakeholders and external banking infrastructure to deliver reliable, production-ready, and 100% quality-driven code for high-volume transaction processing and core ledger systems.### Development, Maintenance & Operations* Maintain, troubleshoot, and enhance core backend services utilizing Node.js within a modular monolith architecture.* Write,



optimize, and maintain complex PostgreSQL queries, ensuring strict data integrity through proper use of transactions, locking, and isolation levels.* Own and enforce production discipline by implementing structured logs, monitoring system health via CloudWatch, and ensuring critical financial hot paths are completely resilient.### Project Lifecycle, API Integrity & Integrations* Integrate and maintain robust connections against core banking platforms and infrastructure vendors (such as Unit, Increase, Treasury Prime, FIS, Fiserv, etc.), managing diverse authentication flows and specifications.* Significantly enhance and operate our production double-entry ledger system, ensuring flawless execution of journal entries, debit/credit accounting, and balance derivation.* Support financial workflows with extreme precision, managing settlement processing, holds, releases, reversals, adjustments, and a

📌 Senior Node.js Engineer (Lima)
🏢 Tech9
📍 Lima