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At Koltin, we’re redesigning the way we care for our moms, dads, and grandparents to help them remain healthy and independent for as long as possible.

How do we do it? Through our health memberships, which provide personalized, preventive care to support our members’ long‑term well‑being.

We are the first company in Mexico offering health memberships that include major medical insurance coverage for older adults—up to 84 years old—backed by BBVA Seguros Salud.

About the role
We’re looking for a product‑driven Senior Software Engineer to drive projects end to end, from unclear problems to shipped solutions focusing on impact. You’ll work across the stack as needed, partnering closely with product, design, data, and operations.

Success in this role means partnering with product to frame problems then taking them through production delivering secure, reliable, and maintainable systems.
- Identify with our Engineering Values (Ownership, Collaboration, Growth, Excellence, Sustainability).




- Drive end‑to‑end delivery of complex features or critical workflows.
- Lead debugging of complex production issues calmly, using metrics, logs, traces, and data inspection to test hypotheses and find root causes.
- Support other engineers through mentorship, pairing, and code reviews.
- Ensure data integrity and confidentiality, including observability and auditing where relevant.
- Care about engineering excellence (reliability, testing, maintainability).
- Are comfortable working across the stack while developing depth in one or two areas over time.

What we’re looking for
- ~5+ years of experience building and shipping production software.
- Experience with web applications, APIs, and relational databases.
- Strong fundamentals in system design, debugging, and data modeling.
- Experience working with a mainstream language and web framework (e.g. PHP & Laravel, Ruby on Rails, Elixir & Phoenix).
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📌 Senior Software Engineer (Estado de México)
🏢 Koltin
📍 Estado de México