Senior Full Stack Software Engineer

Grants fund nonprofit work, but they also create some of the toughest operational challenges. Every grant brings its own deadlines, spending restrictions, reporting requirements, and commitments, so managing that complexity across fundraising, finance, and HR requires more than spreadsheets.

Instrumentl is the system of record for grants. We bring discovery, applications, award compliance, and grant operations into one platform, giving nonprofits a shared foundation to grow their revenue and impact. More than 6,000 nonprofits rely on Instrumentl, from local community groups to state and county governments, universities, and maybe even your local animal shelter.

We're a cash flow positive, YC-backed company building our next chapter, and we're hiring people who will shape and grow the impact of the nonprofit sector.

About the role:

You'll be a Senior Full Stack Engineer reporting to our Head of Engineering, working across design, product, content, and support to deliver a best-in-class experience to every user. On a small, distributed team that owns the product, support, and data stack end to end, you'll build and improve both customer-facing products and internal tooling, own problems from ideation through shipped and reliable solutions, and help set the quality bar for the engineers who join after you. We're an AI-forward team that invests heavily in modern tooling and expects engineers to use it with strong judgment, staying the author and owner of their work rather than outsourcing it to the tools. If you want broad ownership and real impact at a profitable, fast-growing company rather than a narrow slice at a larger one, this is that seat.

What you'll do:

Build & Ship

Build, operate, and improve products for every Instrumentl customer, from small local nonprofits to large organizations

Create responsive interfaces and APIs that drive customer adoption and retention

Contribute high-quality, thoroughly tested code across resilient backends and trustworthy user interfaces

Own problems end to end, managing complexity from ideation through shipped, reliable solutions

Use AI tooling with judgment to move faster while owning the quality, correctness, and long-term maintainability of what you ship

Partner & Elevate

Partner with product, sales, support, and content to improve internal tools and processes

Act as a strategic partner, weighing business impact, reliability, and the detail of every customer interaction

Uphold Instrumentl's quality standards and mentor newer engineers to the same bar

What we're looking for:

Required

• 7+ years as a software engineer building and shipping production software
• Generalist range: comfortable moving across frontend, backend, infrastructure, and data or billing pipelines as the work demands
• Deep, hands-on experience with Ruby on Rails in production: this is our primary stack and where you'll spend most of your time
• Working fluency across Python, JavaScript, PostgreSQL, Redis, and HTML/CSS, with an openness to adopting new tools
• A track record of owning problems end to end and delivering them from ideation to completion

Nice to have

• Startup or early-stage experience
• Experience mentoring or leveling up other engineers

Compensation & Benefits:

For US-based candidates, the target salary range for this role is 170,000 - $200,000 USD, plus equity. Final compensation is determined based on experience, skillset, scope of responsibility, interview performance, and geographic location. We’re committed to paying competitively and equitably.

For candidates based in Canada, compensation varies by province and will be shared by your recruiter early in the process.

Benefits

100% covered health, dental, and vision insurance for employees (50% for dependents)

Generous PTO, including parental leave

401(k)

Company laptop and home-office stipend

Bi-annual company retreats

Instrumentl is evolving rapidly. You’ll always have new challenges and opportunities to grow here.