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Node Engineer / Backend
Job
Kelly Services
Chicago, IL (In Person)
$120,000 Salary, Full-Time
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Job Description
at Kelly Services in Chicago, Illinois, United States Job Description $110000 - $130000 We are a venture-backed fintech company building a next-generation platform for automated technical analysis and trading workflows. Our software brings institutional-grade analytics-pattern recognition, signal generation, backtesting, and automated execution-to professional traders, quantitative analysts, and investment teams. We're looking for a senior Node.js engineer to help evolve the backend systems that power a high-performance trading and analytics platform. You'll work on the infrastructure behind algorithmic trading tools, data ingestion pipelines, large-scale backtesting engines, and a custom scripting environment used by thousands of active market participants. Required Skills & Experience + Design, optimize, and maintain Node.js microservices processing tens of thousands of messages per second + Build and maintain data ingestion pipelines for market, fundamental, and alternative datasets + Improve observability across the platform (logging, metrics, tracing, alerting) + Implement the business logic behind charting, scanning, backtesting, and scripting engines + Write clean, well-tested, and maintainable code with a strong focus on performance + Manage cloud infrastructure using Terraform, including AWS -managed services + Work directly with PostgreSQL and MongoDB (no ORMs), scaling both read- and write-heavy workloads + Diagnose and resolve performance bottlenecks, memory leaks, and event-driven system issues + Partner with cross-functional teams to translate trading ideas into production-grade software + Continuously experiment, learn, and refine how market data and automation intersect Desired Skills & Experience + Deep experience with Node.js, including performance profiling, memory management, and event-loop optimization + Hands-on experience managing infrastructure as code with Terraform ( AWS RDS , Lambda, SQS , etc.) + Strong working knowledge of PostgreSQL and MongoDB at scale + Solid grasp of object-oriented and functional programming paradigms-and when to use each + Familiarity with Kubernetes (configuring clusters required; building and managing clusters is a plus) + Experience working in a microservices architecture with many independently deployed services + A disciplined engineering mindset around testing, CI/CD, containerization, monitoring, and alerting + Genuine curiosity about financial markets and trading; hands-on trading or strategy development experience is a strong plus +