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I take ownership of systems other people are afraid to touch. Across 9+ years, I've been the person handed a messy, undocumented codebase and trusted to understand it end to end, make the architecture decisions, and leave it healthier than I found it. Right now I'm co-founding a clinical workflow startup where I own every technical call, from schema design to deployment strategy. Before that I spent over three years as the sole technical owner of a production aviation platform, responsible for architecture, feature delivery, and production support, with zero critical incidents the whole time. My core stack is .NET / ASP.NET Core and Angular, backed by SQL Server, PostgreSQL, and Redis. I work across backend and frontend, but my real strength is bringing engineering discipline (SOLID, repository pattern, real test coverage, clean deployment pipelines) into places that didn't have it.…I take ownership of systems other people are afraid to touch. Across 9+ years, I've been the person handed a messy, undocumented codebase and trusted to understand it end to end, make the architecture decisions, and leave it healthier than I found it. Right now I'm co-founding a clinical workflow startup where I own every technical call, from schema design to deployment strategy. Before that I spent over three years as the sole technical owner of a production aviation platform, responsible for architecture, feature delivery, and production support, with zero critical incidents the whole time. My core stack is .NET / ASP.NET Core and Angular, backed by SQL Server, PostgreSQL, and Redis. I work across backend and frontend, but my real strength is bringing engineering discipline (SOLID, repository pattern, real test coverage, clean deployment pipelines) into places that didn't have it.

Irving Cristopher Ramirez Magañas

Back-End Developer, Full Stack Developer, Front-End Developer, +2

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I take ownership of systems other people are afraid to touch. Across 9+ years, I've been the person handed a messy, undocumented codebase and trusted to understand it end to end, make the architecture decisions, and leave it healthier than I found it. Right now I'm co-founding a clinical workflow startup where I own every technical call, from schema design to deployment strategy. Before that I spent over three years as the sole technical owner of a production aviation platform, responsible for architecture, feature delivery, and production support, with zero critical incidents the whole time. My core stack is .NET / ASP.NET Core and Angular, backed by SQL Server, PostgreSQL, and Redis. I work across backend and frontend, but my real strength is bringing engineering discipline (SOLID, repository pattern, real test coverage, clean deployment pipelines) into places that didn't have it.…I take ownership of systems other people are afraid to touch. Across 9+ years, I've been the person handed a messy, undocumented codebase and trusted to understand it end to end, make the architecture decisions, and leave it healthier than I found it. Right now I'm co-founding a clinical workflow startup where I own every technical call, from schema design to deployment strategy. Before that I spent over three years as the sole technical owner of a production aviation platform, responsible for architecture, feature delivery, and production support, with zero critical incidents the whole time. My core stack is .NET / ASP.NET Core and Angular, backed by SQL Server, PostgreSQL, and Redis. I work across backend and frontend, but my real strength is bringing engineering discipline (SOLID, repository pattern, real test coverage, clean deployment pipelines) into places that didn't have it.

Available to hire

I take ownership of systems other people are afraid to touch. Across 9+ years, I’ve been the person handed a messy, undocumented codebase and trusted to understand it end to end, make the architecture decisions, and leave it healthier than I found it.

Right now I’m co-founding a clinical workflow startup where I own every technical call, from schema design to deployment strategy. Before that I spent over three years as the sole technical owner of a production aviation platform, responsible for architecture, feature delivery, and production support, with zero critical incidents the whole time.

My core stack is .NET / ASP.NET Core and Angular, backed by SQL Server, PostgreSQL, and Redis. I work across backend and frontend, but my real strength is bringing engineering discipline (SOLID, repository pattern, real test coverage, clean deployment pipelines) into places that didn’t have it.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Beginner

Beginner

Beginner

Beginner

Language

English

Advanced

Korean

Beginner

Work Experience

Co-Founder & Product Engineer at GestLab

April 1, 2026 - Present

Early-stage clinical workflow startup | Operational tooling for healthcare providers • Co-founded a clinical workflow platform from scratch. Decided product features and priorities together with my co-founder, who brings the business knowledge, and turned clinical workflows into system design. • Owned all technical decisions: stack, database design, and deployment. • Chose Supabase for rapid MVP delivery, then migrated business logic from database triggers into a dedicated Hono API layer on Cloudflare Workers as functionality grew, decoupling infrastructure and improving long-term maintainability. • Built an automated pipeline with Claude Code that reads user feedback emails, sorts them by type, and creates draft pull requests for review, with protection against prompt injection. • Platform currently live in production under testing.

Senior Backend Engineer (Contract) at Pact

September 1, 2025 - February 1, 2026

Remote | Identity automation services • Reverse-engineered 4-7 undocumented SSO integration flows across Okta, AWS Cognito, and Google Identity, and wrote technical specs the 10-person engineering team adopted as the reference standard. • Owned the full migration of SSO integrations into a DDD-based architecture, mapping existing flows called across backend and frontend layers and decoupling them into a maintainable, domain-driven structure.

Senior Full-Stack Engineer (Contract) at DEGATECH SYSTEMS INC

February 1, 2022 - September 1, 2025

Remote | Real-time aviation operations and reporting platform • Sole technical owner of a large production platform, responsible for architecture decisions, feature delivery, and production support in close collaboration with domain experts. • Reduced load times by over 50% (from 30+ seconds to under 15) in reporting modules that process millions of rows in SQL Server, by rewriting queries, adding Redis caching, and removing repeated processing. • Introduced repository pattern, SOLID principles, and a hybrid DDD architecture, breaking down oversized functions into maintainable modules and establishing the engineering standards adopted by the team. Built test coverage from scratch and defined the testing architecture, maintaining zero critical production incidents throughout. • Designed a 4-environment deployment flow (dev, QA, staging, production) to replace a 2-branch setup, so every change went through code review and QA before reaching production. • Built a Hangfire-based notification system with timezone-aware scheduling for operational alerts across distributed user groups. • Replaced third-party paid UI components with open-source alternatives to remove licensing blockers, then directed the Angular 11 to 17+ upgrade modernizing the full frontend codebase.

Senior Backend Engineer at VIQ Solutions

November 1, 2020 - February 1, 2022

Remote | Full-time | Speech-to-text document generation platform • Worked on the document creation workflow and the splitting of audio uploads in the processing pipeline. • Extended the document processing pipeline to support new document types and custom output configurations requested by different clients, researching feasibility and integrating solutions into the existing flow. • Refactored core modules of the C#/.NET processing pipeline into smaller, readable parts, working in pairs with teammates during code review. • Helped find and fix a production issue caused by a wrong dependency injection setup in ASP.NET Boilerplate, which removed random request failures and hangs in the processing pipeline.

Software Engineer at Luxoft

February 1, 2019 - October 1, 2020

Full-time | Enterprise logistics tooling | Workforce operations platform • Built internal operational tools supporting logistics and parking management workflows for a 400-person workforce, owning the full frontend in React with Node.js REST APIs on the backend. • Diagnosed and resolved defects in a parallel .NET legacy system, covering root-cause analysis, reproduction, and fix across an existing enterprise codebase. • Contributed to a frontend migration from legacy stack to Vue and Tailwind CSS.

.NET Developer at Bosch Mexico

June 1, 2016 - February 1, 2019

Full-time | Enterprise systems and IoT integrations • Built and maintained REST APIs consumed by IoT devices, connecting hardware sensors to internal operational dashboards across multiple enterprise projects. • Led the migration from .NET Framework to .NET Core, planning the approach with junior team members and coordinating to maintain continuity across dependent systems.