Senior Software Engineer

Join to apply for the Senior Software Engineer - Product Engineer role at Koltin 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). Solid experience with SQL and relational databases (e.g. MySQL/MariaDB, PostgreSQL). Experience writing automated tests (unit, integration, and end‑to‑end where appropriate). Experience collaborating in multidisciplinary teams (product, design, data, ops). Comfort operating in a high‑ownership environment with changing priorities and quick iteration. Current stack PHP & Laravel, MariaDB, Vue.js, Inertia, Tailwind. Key Outcomes Projects you lead move from problem framing to production reliably (typically 1–4 weeks), delivering clear value to users and the business. Complex problems are broken down into well‑scoped phases, with risks and trade‑offs surfaced and managed early. Technical decisions balance simplicity, reliability, and maintainability, resulting in systems that are easy to operate and evolve. The quality of the codebase and production systems improves through your contributions (structure, testing, observability). The team benefits from reusable patterns and shared solutions that reduce duplication and cognitive load. Access to professional development tools and resources (courses, books, workshops, etc.) Unlimited virtual medical assistance (general practitioner, nutritionist, psychologist) for you and 3 family members Access to physical wellness tools (TotalPass) 9 extra vacation days per year in addition to the legal minimum Private Major Medical Insurance All the equipment you need to do your best work $500 MXN monthly support for home office expenses One‑time $2,000 MXN support to set up your home workspace If you’re excited about this role but don’t meet every requirement, we still encourage you to apply. We know that great candidates don’t always match every bullet point. Apply in the following link: #J-18808-Ljbffr