Senior Software Engineer Backend
Koltin
Software Engineering
Mexico City, Mexico
Posted on Sep 16, 2025
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. Through our health memberships, which provide personalized, preventive care to support 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 Senior Software Engineer to help us design and build the backend infrastructure and APIs that will power our new mobile app and support the experience of thousands of older adults across Mexico.
You will play a critical role in enabling a secure, reliable, and scalable system to serve our members and operational teams. More details below but we are looking for someone that can do things across the stack but is more inclined to the backend side.
You are a good fit
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. Through our health memberships, which provide personalized, preventive care to support 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 Senior Software Engineer to help us design and build the backend infrastructure and APIs that will power our new mobile app and support the experience of thousands of older adults across Mexico.
You will play a critical role in enabling a secure, reliable, and scalable system to serve our members and operational teams. More details below but we are looking for someone that can do things across the stack but is more inclined to the backend side.
You are a good fit
- Identify with our Eng Values.
- Owns end-to-end delivery of complex features or critical workflows
- Leads debugging of difficult production issues with calm and focus
- Coaches and unblocks others; mentors other engineers
- Champions engineering excellence (reliability, testing, maintainability)
- Identify with the T shaped model, which are generalists with a strong suit in one specific area. We are all engineers at our core no matter our specialization
- Fiveish years of web development with the likes of PHP & Laravel, Ruby & Rails, Elixir & Phoenix, etc
- SQL and relational databases like MySQL/MariaDB, PostgreSQL
- Fast-paced startup environments
- Automated unit/integration/behaviour/etc tests
- Multidisciplinary teams, collaborating with designers, product management, data
- Bonus: Familiarity with frontend frameworks like VueJS, React, Tailwind, etc. If not, there’s no worry as long as you are open to learning!
- Knowledge of our stack (not a requirement, just a bonus): PHP & Laravel, MariaDB, VueJS & Inertia & Formkit, Tailwind.
- Able to drive projects from ideation to completion touching all stacks if needed, having an impact on the business and on our clients
- Scopes complex projects into phases and deliverables managing ambiguity, risks and tradeoffs effectively
- Defines and executes technical approaches balancing simplicity, reliability, and maintainability
- Influences technical direction within the team: how we structure code, how we test, how we operate
- Identify patterns and concepts that can be reused, promoting platforms within our codebase
- 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