Node Engineer / Backend

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

+ Bonus: Experience with systems programming or performance-critical components using C++ and/or Java

+ Bonus: Fluency or professional working proficiency in Russian or Ukrainian

The Offer

+ Bonus eligible

You will receive the following benefits:

+ Medical, Dental, and Vision Insurance

+ Vacation Time

+ Stock Options

Applicants must be currently authorized to work in the US on a full-time basis now and in the future.

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