Senior Software Engineer

Senior Software Engineer

About us

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.

You’re a good fit if you:

• 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.

• You use AI-powered tools to increase productivity and quality while retaining full ownership of decisions and outcomes.

Reliable with a problem.

Cumulative. Flawless scoping and slicing problems. Unimpaired communication, visibility and alignment. Mentoring and growing others. All about scope size and ambiguity. Usually contained within a project.

• Owns end-to-end delivery of complex features or critical workflows

• Trusted to handle ambiguity and trade-offs aligned with team and business priorities

• Defines technical approaches for projects, balancing simplicity, reliability, and maintainability

• Drives technical discussions with cross functional members (product, design) and stakeholders

• Leads debugging of difficult production issues with calm and focus

• Ensures the project has baseline observability (metrics, logs, exceptions) from inception

• Plans and executes hypothesis-driven debugging using observability and production data

• Multiplies the effectiveness of other engineers

• Coaches and unblocks more junior engineers helping them grow into broader ownership

• Mentors more junior engineers through context-sharing, design discussions, and system framing

• Collaborates and grow peers on areas of self expertise

• Project-level ownership of data correctness.

• Owns data quality, observability, auditing, confidentiality, and incident response for the project’s data paths.

• Designs and maintains schemas and transformations (tables, events, payloads) balancing speed, structure, backward compatibility and future proofing.

• Designs monitoring from inception for data invariants and failure modes (e.g. missing records, duplication, stale or inconsistent states).

• Partners with other functions to ensure engineering systems produce trustworthy, well-modeled data by default.

• Champions engineering excellence (reliability, testing, maintainability)

• Improves architecture as a whole: modularity, layering, boundaries

• Influences technical direction: how we structure code, how we test, how we operate

• Influences internal process improvements: reviews, testing and deployment practices

• Leads by example in reviews, incident handling, and tech planning

• Close to the business, goes after the problem

• Goes after the why before the how, and says so when the ask and the problem don't match

• Shapes with the squad rather than waiting for a framed ticket, and talks to the people who live the problem

• Knows the numbers their project moves by heart, and drives it until they move

Perks & Benefits :

• 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

• Access to the all the tools you need to be productive, including but not limited to AI-powered development tools, IDEs, paid app licenses, etc.

• $700 MXN monthly support for home office expenses

• One-time $2,500 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.