Senior Software Engineer

Greenhouse is the first Orchestrated Hiring Ecosystem: a single place that brings the right person and the right role together at the right time. Our mission  is to make hiring work for everyone - so we go to great lengths to hire great people because we believe that they’re the foundation of our success. At Greenhouse, you’ll join a team that collaborates purposefully, fosters inclusivity, and communicates with transparency and accountability so we can achieve our mission.

Join us to do the best work of your career, solving meaningful problems with remarkable teams.

Greenhouse has partnered with Deel to be its Employer of Record in Argentina (more informationhere).  Through this arrangement, Deel is hiring a Senior Full Stack Software Engineer to provide services to Greenhouse.

This role will support the design, development, and evolution of the Company’s web-based applications. 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 role 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 job

• 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.
• An AI fluent engineer - you already use tools like Claude to move faster, and you're excited to build on that experience

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
• Fluency in agentic coding and with leveraging and configuring AI tooling

Who we are

At Greenhouse, we live by our mission through using our own product to help us hire the right person for the job, every time. We’re committed to designing and responsibly using AI tools to transform how we work while keeping people at the center. We are a remote-first company and have shared office spaces in New York City and Ireland, and optional co-working spaces that give us flexibility to do our best work anywhere. We take an active role in our growth through a performance review program that’s committed to providing actionable feedback, and a bonus structure that rewards great performance. We believe that bringing together a variety of perspectives makes us a stronger company - and we nurture leaders who create an inclusive culture and invest into employee resource groups that celebrate our differences and life experiences. We’re proud to have built an  award-winning culture that’s been recognized as Fortune’s Best Places to Work and Inc.’s Best Workplaces multiple years in a row. 

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Greenhouse Software is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance and/or a reasonable accommodation during the application process, reach out to [email protected].

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