SAN JOSÉ, COSTA RICA · REMOTE US EXPERIENCE PERSONAL PORTFOLIO · SENIOR SOFTWARE ENGINEER

SYSTEMS ENGINEER · .NET DEVELOPMENT + QA AUTOMATION

FABIÁN SÁNCHEZ MUÑOZ

Senior Software Engineer | .NET Developer C# / .NET · QA Automation

I design and deliver enterprise solutions using C#/.NET, ASP.NET MVC, Web APIs and SQL Server, combining software engineering expertise with QA automation, API validation and production reliability.

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ENGINEERING PROFILE CR / REMOTE
01SOFTWARE ENGINEERINGC# · .NET 8 · ASP.NET MVC · REST
02QUALITY ENGINEERINGSelenium · POM · API · Integration
03DATA & PERFORMANCESQL Server · T-SQL · Optimization
04DELIVERY & OPERATIONSAzure DevOps · CI/CD · IIS
OPEN TO SENIOR SOFTWARE ENGINEERING OPPORTUNITIES
15+enterprise clients supported
25%+team members coordinated
40%hours for incident resolution after process improvement
50%+active enterprise systems supported
30%years combining development and QA experience
01PROFILE

ONE ENGINEERING PROFILE · TWO STRONG DISCIPLINES

I build enterprise software.
I also improve quality through automation.

My core is enterprise software engineering with Microsoft technologies: C#, .NET, ASP.NET MVC, Web API and SQL Server. I have developed ERP integrations, optimized databases, automated processes and supported production systems.

At the same time, hands-on QA automation experience with Selenium, API testing and CI/CD gives me a second lens: how a system will be validated, where it can fail, and how to make releases safer before production.

DEV / 01Software Engineering

Designing and owning enterprise applications from requirements to production, with emphasis on maintainability, performance and clear architecture.

  • C# / .NET Core / .NET 8 / ASP.NET MVC
  • REST APIs, microservices and modular architectures
  • SQL Server tuning, stored procedures and indexing
  • IIS production environments and legacy modernization
QA / 02Quality Engineering & Automation

Building quality into delivery through automation, API and integration validation, reusable test design and close collaboration with development teams.

  • Selenium WebDriver in C# / .NET 8 with POM
  • NUnit, xUnit, API and integration testing
  • Automated testing inside Azure DevOps pipelines
  • Regression strategy, migration validation and root-cause analysis
02PROFESSIONAL EXPERIENCE

ENTERPRISE SOFTWARE · QUALITY ENGINEERING · TECHNICAL LEADERSHIP

Building, validating and supporting business-critical software.

My experience combines software engineering, enterprise systems, QA automation and production support. I have worked across the complete software lifecycle: requirements analysis, technical design, development, testing, deployment and continuous improvement.

JUN 2022 — PRESENTPRODUSOFTSan José, Costa Rica

Senior .NET Developer & Technical Support Lead

SOFTWARE ENGINEERING

Responsible for developing and maintaining enterprise solutions integrated with Softland ERP, supporting multiple business processes while leading technical support operations. I participate from requirements analysis and solution design through implementation, testing, deployment and production support.

  • Develop enterprise applications using C#, ASP.NET MVC, Web API, Entity Framework, LINQ and SQL Server for accounting, inventory, invoicing, payroll, purchasing and sales processes.
  • Build REST APIs, integrations, synchronization processes, reports and automated tasks that improve business operations.
  • Optimize SQL Server performance through query analysis, indexing, stored procedures and database improvements.
  • Lead support operations for approximately 57 enterprise clients and 30-40 active systems, prioritizing incidents according to business impact.
  • Analyze complex production issues, identify root causes and coordinate technical solutions with development and business teams.
57enterprise clients supported40s→2-3sSQL optimization improvement90s→15sreport generation improvement<24hincident resolution improvement
C#.NETASP.NET MVCWeb APISQL ServerSoftland ERP
OCT 2023 — JUL 2024UNISYSRemote · USA

Software QA Engineer / Automation Engineer

QUALITY ENGINEERING

Participated in an international enterprise migration project from Click Software to ServiceNow, ensuring data integrity, system reliability and quality throughout different delivery phases.

  • Executed functional, integration, regression, UAT and migration testing for critical business processes.
  • Validated APIs using Postman, verifying responses, integrations and data consistency between systems.
  • Worked with distributed teams in the United States, Mexico, India and the Netherlands using Agile methodologies.
  • Documented defects with evidence, expected behavior and technical details to accelerate resolution.
APIintegration validationUATbusiness process quality assurance
SeleniumC#PostmanServiceNowAzure DevOps
JUL 2022 — MAR 2023GROUPS360Remote · USA

Quality Assurance Engineer

QUALITY ENGINEERING

Designed and executed QA strategies for enterprise web applications, improving validation processes and strengthening collaboration between development and quality teams.

  • Created test cases, validation scenarios and technical documentation throughout development cycles.
  • Performed functional, exploratory and regression testing before production releases.
  • Collaborated with developers on defect analysis, root cause investigation and continuous improvement.
QARegression TestingJiraAgile
03EXPERTISE / EDUCATION

TECHNICAL TOOLKIT

A Microsoft-centered stack,
with quality and delivery built in.

01Languages & Frameworks

C# · .NET Core / .NET 8 · ASP.NET MVC · JavaScript · Java · LINQ · Entity Framework

02Architecture & Concepts

OOP · Design Patterns · Microservices · REST APIs · Modular Architectures

03Databases & Performance

SQL Server · Oracle · T-SQL · Stored Procedures · Query Optimization · Indexing

04Cloud, DevOps & Operations

Azure DevOps · CI/CD YAML · Git · IIS · Cloud-ready Azure architectures · Bitbucket

05Automation & QA

Selenium WebDriver · Page Object Model · NUnit · xUnit · API Testing · Postman · Integration Testing

06Enterprise Tools

Jira · Trello · ServiceNow · Salesforce · Softland ERP · Crystal Reports

DEGREE Bachelor's Degree in Systems Engineering

Universidad Fidélitas · May 2018 — Apr 2021

CERTIFICATION CCNA Switching & Routing

Universidad Fidélitas · May 2018 — Aug 2018

LANGUAGES Spanish · English

Instituto de Lenguaje Intensa · Jan 2020 — Jan 2022

04CONTACT

NEXT OPPORTUNITY

Interested in roles where building well and shipping safely both matter.

I'm open to mid-senior and senior opportunities in software engineering, .NET development, technical leadership and QA automation — especially teams that value ownership across the full software lifecycle.

Email[email protected] LinkedIn/in/fabiansm02 GitHub/fabiansm02