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Óscar Martín

Senior .NET Developer上級エンジニア

Building robust, scalable systems with the .NET ecosystem — and exploring the frontier with Elixir, real-time tech and AI-assisted engineering.

Download CV
8+
Years of experience
.NET 6/8/10
Core platform
Elixir
Currently mastering
[第一章 · 01 / About]自己紹介

Senior engineer, lifelong learner

Senior .NET Developer skilled in .NET 6/8/10, .NET Framework, C#, and Entity Framework — focused on building scalable web apps and APIs, and always learning new technologies such as Elixir.

With over 8 years in software development, I specialize in robust and scalable web applications across the .NET ecosystem, writing clean code and applying best architectural practices.

›I write clean code and apply best architectural practices to deliver solutions that are efficient and maintainable.
›I specialize in robust, scalable web applications across the .NET ecosystem.
›I mentor and support junior developers, helping them grow their skills and confidence.
›I am always exploring new technologies and methodologies to stay ahead in a fast-moving industry.
[職歴 · 02 / Experience]キャリア

My professional journey building innovative solutions

8+ years crafting software across .NET, Salesforce, and modern web — from public-sector platforms to high-traffic consumer products.

Senior .NET Developer

EYSA Servicios

2024 — PresentRemote
  • Lead development of .NET 6 solutions for public sector clients in Spain (Madrid, Bilbao, Sevilla, León…).
  • Designed and implemented scalable RESTful APIs, Razor pages and background services using clean architecture.
  • Mentored junior developers, promoting best coding practices and technical growth.
.NET 6/8DockerAzure DevOpsSQL ServerMicroservicesReactBootstrap

.NET Developer

Whakoom Comics

2021 — 2024Remote
  • Developed the company backoffice using .NET Framework 4.8 with MVC.
  • Created desktop software integrated with Azure Blobs for internal use, using .NET Core 5 and MVVM architecture.
  • Maintained and improved the public website with thousands of daily users in .NET Framework 4.8.
  • Worked with jQuery, classic HTML/CSS (using LESS).
.NET Framework 4.8.NET Core 5MVCMVVMAzure BlobsjQueryHTML/CSSLESS

Salesforce Developer

S4G

2019 — 2021Madrid, Spain (hybrid)
  • Requirements gathering and direct communication with clients.
  • Salesforce solution development for Grupo SM, Sodexo, Maxxium, and GDT.
  • Technical leadership of the support team.
  • Development of Triggers, Batch processes, and custom solutions.
SalesforceApexCopadoJira

Junior .NET Developer

NTT Data

2018 — 2019Madrid, Spain
  • Developed the backend of the backoffice platform using .NET and MS SQL.
  • Maintained mobile solutions for service station management in C# with Xamarin.
  • Prepared technical documentation and test plans with Agile/Scrum tools.
.NETC#MS SQLJiraConfluence
[第二章 · 03 / Expertise]専門技術

What I bring to the table

.NET & Backend

Expert in .NET 6/8, ASP.NET Core, Entity Framework and RESTful API architectures. Experienced with background services, clean architectures and microservices.

Frontend

Skilled in JS, jQuery, HTML and CSS. Continuously expanding into React, Vite and modern frameworks for responsive, polished user interfaces.

Databases

Hands-on with SQL Server and PostgreSQL — schema design, indexing strategy and query optimization for performance at scale.

DevOps & Cloud

Azure DevOps, Jenkins, Docker and CI/CD pipelines. Comfortable owning cloud infrastructure and automation end to end.

[第三章 · 03 / Stack]道具箱

Tools & technologies

>C#>.NET 6/8/10>.NET Framework 4.7/4.8>ASP.NET Core MVC>Entity Framework>RESTful APIs>SignalR>Hangfire>Microservices>Clean Architecture>SQL Server>PostgreSQL>Docker>Azure DevOps>Jenkins>CI/CD>Git>JavaScript>jQuery>React>Vite>HTML / CSS>Elixir>Phoenix
[第四章 · 04 / Featured project]代表作

Nexus: Downfall

A real-time browser strategy game — and my playground for distributed, fault-tolerant systems. Built on the BEAM with Elixir & Phoenix to handle massive concurrency and live updates.

Nexus: Downfall — Dashboard view
Visit nexusdownfall.com

Tech stack

Backend
Elixir + Phoenix + LiveView
Processes
OTP / GenServer
Persistence
PostgreSQL
Jobs
Oban
Real-time
Channels / PubSub
Frontend
Tailwind + PixiJS

OTP supervision trees keep the game world resilient, Oban schedules background ticks, and PubSub pushes live state to every connected player — rendered with a PixiJS canvas over Tailwind UI.

[第五章 · 06 / AI workflow]人工知能

AI-assisted engineering, grounded in experience

I've learned to use AI as a development companion — and the difference shows in the results. It works because of my architecture knowledge and years of experience, not instead of them.

AI as a companion

I use AI to move faster on boilerplate, exploration and refactors — keeping my focus on the hard problems.

Architecture leads

Prompts only go as far as the design behind them. My architecture and domain experience steer the output toward production-grade code.

Always reviewed

Every suggestion is read, challenged and tested. AI amplifies a senior engineer — it doesn't replace the judgement.

Toolbelt

GitHub Copilot

In-editor pair programming

Codex

Agentic code generation

DeepSeek

Reasoning & code review

Ollama

Local, private models