Senior Full Stack Engineer

Hello, we’re Instrumentl. 👋 Nonprofits do some of the most important work in the world, and most of them are still managing grants in spreadsheets. We're fixing that. Instrumentl is a profitable, hypergrowth, YC-backed SaaS platform building the operating system for grant-funded organizations. More than 5,500 nonprofits use Instrumentl to discover, track, and win grant funding, from local community organizations to the San Diego Zoo and the University of Alaska. Collectively they’ve moved over $1 billion through our platform. We're growing quickly, customers love us (check out our G2 reviews!), and we're hiring people who want to build something that matters. 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 & ShipBuild, operate, and improve products for every Instrumentl customer, from small local nonprofits to large organizationsCreate responsive interfaces and APIs that drive customer adoption and retentionContribute high-quality, thoroughly tested code across resilient backends and trustworthy user interfacesOwn problems end to end, managing complexity from ideation through shipped, reliable solutionsUse AI tooling with judgment to move faster while owning the quality, correctness, and long-term maintainability of what you shipPartner & ElevatePartner with product, sales, support, and content to improve internal tools and processesAct as a strategic partner, weighing business impact, reliability, and the detail of every customer interactionUphold Instrumentl's quality standards and mentor newer engineers to the same bar What we're looking for: Required7+ years as a software engineer building and shipping production softwareGeneralist range: comfortable moving across frontend, backend, infrastructure, and data or billing pipelines as the work demandsDeep, hands-on experience with Ruby on Rails in production: this is our primary stack and where you'll spend most of your timeWorking fluency across Python, JavaScript, PostgreSQL, Redis, and HTML/CSS, with an openness to adopting new toolsA track record of owning problems end to end and delivering them from ideation to completionNice to haveStartup or early-stage experienceExperience 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. Benefits100% covered health, dental, and vision insurance for employees (50% for dependents)Generous PTO, including parental leave401(k)Company laptop and home-office stipendBi-annual company retreats Instrumentl is evolving rapidly. You’ll always have new challenges and opportunities to grow here. Instrumentl is an equal opportunity employer. We are committed to building an inclusive workplace and do not discriminate based on race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, or any other legally protected status. We encourage candidates from all backgrounds to apply. If you need a reasonable accommodation during the application or interview process, please let us know. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.