Greenhouse - Sr Fullstack Engineer

Greenhouse has led in hiring innovation for 10+ years. Our AI-powered platform empowers teams to make smarter, faster decisions and consistently hire top talent, transforming recruiting into a strategic engine for growth.

In this role, you will work across the entire application stack to deliver high-quality features for the Company. Your work will range from building net-new functionality to improving how data flows across the Company’s services at scale. This is a collaborative engagement where you will work closely with product, design, and engineering partners to ensure the platform remains performant, reliable, and user-friendly.

Who Will Love This Role

• A Pragmatic Architect - You don’t just write code, you think about how systems connect. You enjoy refining data models and improving system architecture to support long-term scalability.

• A Full-Stack Specialist - You are equally comfortable navigating a PostgreSQL query, styling a React component, or building a robust controller in Rails.

• A Quality Advocate - You believe “done” includes comprehensive automated tests and clear documentation. You take pride in leaving the codebase better than you found it.

• A Collaborative Problem-Solver - You thrive in an environment where code reviews are a dialogue and cross-functional collaboration is the norm.

What You’ll Do

• Build, modify, and maintain features using Ruby on Rails, modern JavaScript frameworks (React), HTML, and CSS

• Execute on high-impact projects

• Ensure code is maintainable and aligned with established engineering standards

• Contribute to the evolution of system architecture, including improvements to data transfer across services and ingestion pathways

• Design and maintain RESTful APIs, webhook-driven integrations, and data exchange pathways with third-party systems

• Diagnose and resolve complex integration issues to improve information flow

• Design and update PostgreSQL data models, refactoring legacy models to improve performance and reduce complexity

• Participate in production support during working hours, addressing bugs and escalations as needed

• Use monitoring and observability tools to maintain application stability and support performance tuning

• Participate in peer code reviews and provide constructive feedback

• Produce technical documentation, including architecture notes, implementation guides, and runbooks

• Write automated tests (unit, integration, and E2E) to ensure reliability and coverage

You Should Have

• 5+ years of experience writing and maintaining production-level code in a professional environment

• Strong experience with Ruby and Ruby on Rails

• Experience with JavaScript and React, plus solid HTML and CSS fundamentals

• Deep understanding of MVC architecture and backend optimization

• Proven ability to write efficient SQL, design relational data models, and optimize PostgreSQL performance

• Experience building and consuming RESTful APIs and managing third-party integrations via webhooks

• Proficiency with automated testing frameworks (e.g., RSpec, Jest, Cypress) and a commitment to test-driven practices

• Ability to contribute to architectural discussions and implement solutions that operate effectively at scale

• Comfort working in agile environments using standard development tools such as Git, CI/CD pipelines, and observability platforms

Interview Process

• Silver Recruiter Screening.

• Silver Technical Interview.

• Client Screening interview.

• Client Live coding Interview.

• Client System Design Interview.

• Client Behavioral Interview.