Koltin

Senior Software Engineer – Product Engineer

Koltin

full-time

Posted on:

Location Type: Remote

Location: Mexico

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Job Level

Senior

Tech Stack

ElixirLaravelMariaDBMySQLPHPPostgresRubyRuby on RailsSQL

About the role

  • Drive projects end to end, from unclear problems to shipped solutions focusing on impact.
  • Work across the stack as needed, partnering closely with product, design, data, and operations.
  • 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).

Requirements

  • ~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.
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
  • 💵 $500 MXN monthly support for home office expenses
  • 💎 One-time $2,000 MXN support to set up your home workspace

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
production softwareweb applicationsAPIsrelational databasessystem designdebuggingdata modelingautomated testsSQLPHP
Soft skills
mentorshipcollaborationproblem-solvingcalmness under pressureengineering excellenceadaptabilitycommunicationteamworkleadershipownership