Senior Software Engineer (JavaScript / Ruby on Rails)

About the role

We are seeking a full‑time, remote Senior Software Engineer with extensive Ruby on Rails experience to join a fast‑growing health‑tech startup. You will work closely with product managers and cross‑functional teams to design, build, and optimize critical features and AI‑driven tools.

Key responsibilities

• Partner with product managers to clarify business needs, lead complex initiatives, and produce technical designs, estimates, and delivery plans.
• Design and implement core Ruby on Rails features, data models, and integrations while establishing reusable patterns and guiding architectural decisions.
• Lead engineering efforts for user‑facing AI agents, including tooling, testing, monitoring, and failure handling.
• Mentor engineers, conduct code reviews, and ensure high quality through automated tests and robust deployment practices.

Required profile

• 8+ years of professional software engineering experience, including 5+ years building production Ruby on Rails applications.
• Strong communication skills in English and proven ability to lead ambiguous projects to successful release.
• Experience in fast‑paced startup environments, with a collaborative, can‑do attitude.

Required skills

• Ruby on Rails, Ruby, JavaScript, HTML, CSS
• PostgreSQL, SQL, relational data modeling
• Stimulus, Turbo, Tailwind CSS, Sidekiq, Heroku Shield
• AI tool usage for code generation and verification

What we offer

• 15 days paid time off, 1 floating day, 3 sick days, plus national holidays.
• Opportunity to own your work, be recognized for contributions, and collaborate with smart, creative teammates.
• Supportive culture that values transparency, learning from mistakes, and individual uniqueness.