Senior Software Engineer, Product Foundations

New York, NYFull-time$168k–$235k2026-10-27 → 2026-11-10

Hybrid

Core

Build intuitive, reliable, and scalable core platform capabilities (reporting, document management, training, calendars) serving administrators and employees.

Role type

Senior Software Engineer (Product Foundations)

Builds

Core platform features and high-volume, fault-tolerant processing infrastructure

Domain

HR Tech / SaaS

Deliverable

production ML models | product features

Required skills

Golang, Ruby on Rails, SQL, AWS, Kafka, Kubernetes, Docker, Terraform, Redis, ElasticSearch, MySQL, Git, CircleCI, DataDog

Preferred skills

AI/ML integration, mentoring engineers, cross-functional collaboration

Technologies

Golang, Ruby on Rails, Javascript, MySQL, Kafka, AWS, Git, Memcache, Redis, ElasticSearch, Docker, Terraform, Kubernetes, CircleCI, DataDog

Responsibilities

Independently own large-scoped projects from discovery to launch; improve performance, reliability, and scalability of existing systems; enhance testing, monitoring, and continuous deployment infrastructure; keep sensitive data compartmentalized and secure.

Seniority

Senior, hands-on IC

About Justworks

Justworks is leveling the playing field for all small businesses. We handle the nitty-gritty of payroll, benefits, compliance, and HR, so our customers have more time to learn, grow, and seek something worthwhile. Today, Justworks offices in New York, Toronto, London, Tampa and Mexico City serve more than 12,000 businesses and 200,000 workers around the globe.