Ruby Software Engineer III

Job Description

Job Description

KNOWiNK

Mid-Level Ruby Developer

St. Louis, MO | Hybrid (3 days in office / 2 days remote) | Full-Time

About KNOWiNK

KNOWiNK builds election technology that keeps democracy running. Our platform powers poll worker check-in, voter verification, and election management for jurisdictions across the country. We're a tight-knit team that cares deeply about what we build, because what we build matters. If you want your work to actually mean something, you're in the right place.

The Role

We're looking for a mid-level Ruby developer to join our engineering team and help build and maintain the software that powers elections. You'll be working on real, meaningful problems, complex data workflows, client-facing tooling, and backend systems that have to work flawlessly when it counts most. You'll collaborate closely with cross-functional teammates and have real ownership of your work from day one.

This is a hybrid role, three days a week in our St. Louis office, two days remote. We genuinely like each other here, so the in-office days don't feel like a punishment.

What You'll Do

• Design, build, and maintain Ruby/Rails applications that are reliable, scalable, and clean
• Collaborate with product, QA, and client-facing teams to translate requirements into solid technical solutions
• Write and maintain automated tests, we take quality seriously
• Participate in code reviews and contribute to engineering best practices
• Troubleshoot and debug production issues, then actually fix the root cause
• Contribute to technical documentation and keep it current
• Work within Agile/Scrum workflows and stay in sync with sprint goals
• Bring your ideas, we want engineers who think, not just execute

What We're Looking For

• 3-5 years of professional Ruby on Rails experience
• Solid understanding of RESTful API design and implementation
• Comfortable with relational databases (PostgreSQL preferred) and writing efficient queries
• Familiar with Git and collaborative development workflows
• Experience with test-driven development (RSpec, Minitest, or similar)
• Strong communication skills, you can explain what you're building and why
• Self-directed and comfortable asking for help when you need it
• Genuinely curious about how things work and how to make them better

Nice to Have

• Experience with JavaScript/React or Vue on the frontend
• Background in govtech, civic tech, or working in regulated industries
• Familiarity with background job processing (Sidekiq, Delayed Job, etc.)
• Docker or containerized development environment experience
• Exposure to CI/CD pipelines

Why KNOWiNK

• Your work directly supports the integrity of U.S. elections, 1 in 4 voters in the US uses one of our products that's not nothing
• Collaborative, low-ego team that values good ideas over seniority
• Hybrid schedule with real flexibility baked in
• Competitive salary and benefits
• Opportunity to grow with a company that's scaling fast and doing meaningful work

KNOWiNK is an equal opportunity employer. We celebrate diversity and are committed to building an inclusive environment for all employees.