Our Location
Chiapa de Corzo
Chiapas, Mexico
Creative
Systems Engineer transitioning into a QA Engineer with an analytical and detail-oriented approach. Backed by solid technical experience in Java, web development, and version control (Git/GitHub), I am currently specializing in Manual Testing, Test Case Design, and Bug Reporting. Proven ability to identify critical defects and ensure software alignment with end-user expectations.
0+
Years Experience
0+
Digital Projects
0%
Commitment to Quality
UI/UX Testing
Development
Quality Assurance
About
Bridging Creativity and Technical Rigor to Ensure Software Excellence
Ensuring software quality and reliability through structured, creative, and analytical engineering.
Hi, I'm Joel Alamillo - a Systems & QA Engineer
I am a Computer Systems Engineer with a unique background as a professional musician and composer. This combination allows me to bring the absolute discipline, structure, and sharp focus of musical arrangement into the technical world of software development and Quality Assurance.
Currently, I specialize in Software Testing (Manual & API) and mobile development using Java and Dart (Flutter). My creative background gives me a distinct advantage in UI/UX Testing—allowing me to spot visual and functional defects that others might overlook. I am highly skilled in designing test documentation, executing regression tests, and ensuring that software aligns perfectly with both technical requirements and end-user expectations.
Based in Mexico and actively looking for global opportunities in QA and Software Engineering.
UI/UX Validation:
Applying visual design principles to analyze and test interface behavior, ensuring seamless user experiences.
QA Engineering
Designing test plans, checklists, and executing cross-browser and API tests using Postman and SQL.
Software Engineering
Building clean and structured logic with Java and developing mobile apps with Flutter.
2026
QA Engineering Certificate | Triple ten
2026
B.S. in Computer Systems Engineering
2021
Master's Degree in Music Composition
đź’»
Detail-oriented Engineer dedicated to software quality and automation
QA & Software Testing
Manual Testing
95%
Test Documentation
95%
Bug Reporting & Defect Tracking
90%
Tools & Databases
Postman (API Testing)
85%
MySQL & Database Querying
80%
Figma (UI/UX Analysis)
72%
Software Development
Java
85%
Dart & Flutter (Mobile Development)
70%
HTML/CSS & JavaScript
85%
Methodologies & Workflow
Github
76%
DLC / STLC (Agile & Scrum)
73%
Git
90%
Professional Expertise
Computer Systems Engineer specialized in securing software reliability and driving clean digital solutions. I apply structural analysis from engineering and visual precision from design to deliver defect-free deployments.
5
Years Experience
10
Projects Completed
30+
Happy Clients
Certifications
QA Engineering | Triple ten
B.S. Computer Systems Engineering
Master in Music Composition
Resume
Bridging Creativity and Technical Rigor to Ensure Software Excellence
Professional Journey
A proven track record of combining software engineering, technical analysis, and creative solution design to build and validate high-quality digital products.
Music Software Developer
Nueva ArmonĂa
Educational publisher and software house specialized in music and technology solutions.
- Led the development and maintenance of the web platform with integrated payment gateways (Stripe), ensuring secure transaction systems and zero processing errors through unit testing and payment workflow validation.
- Designed and tested a sheet music visualization and "Piano Scroll" application, achieving an accurate graphical representation of musical data and a seamless user experience using systems engineering principles and UI testing.
- Executed cross-device compatibility and performance testing across the publisher's digital tools, enabling early detection of rendering defects through exploratory testing and version control with Git/GitHub.
Web Developer
Universidad Linda Vista
Higher education institution focused on arts, humanities, and academic research.
- Designed and implemented a digital music repository platform, systematizing and preserving institutional heritage while streamlining resource access for multiple user segments.
- Conducted requirements validation and user acceptance testing (UAT) with faculty and students, delivering a highly functional tool that optimized lesson planning and autonomous learning.
- Architected the system infrastructure and data repository, establishing a robust technological framework that supports material reuse and real-time artistic collaboration.
Music Educator
Universidad Linda Vista
Higher education institution focused on arts, humanities, and academic research.
- Structured and delivered comprehensive educational programs, translating complex musical and theoretical concepts into clear, actionable training methodologies for diverse student groups.
- Cultivated advanced soft skills, including active listening, high-stakes communication, and conflict resolution, while coordinating large musical ensembles and academic projects.
- Applied rigorous attention to detail and analytical listening to evaluate technical execution, driving continuous performance improvement and collaborative teamwork under tight deadlines.
Academic Excellence
A solid academic foundation combining formal computer systems engineering, specialized software quality training, and advanced artistic composition.
Bachelor of Computer Systems Engineering
2023 - 2026UVEG
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Master of Music Composition and arrangement
2019 - 2021Superior School of Music Education
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QA Engineering Certificate
02/2026 - 06/2026TripleTen
Intensive bootcamp specialized in modern Quality Assurance methodologies, including manual testing, API validation, web technologies, and defect tracking tracking workflows.
Services
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Functional & Manual Testing
Executing comprehensive functional, regression, and smoke tests to verify that software behavior aligns perfectly with business requirements and specifications.
Test Documentation Design
Structuring robust test cases, checklists, and bug reports with clear pre-conditions, detailed steps, and precise expected results to ensure clear defect tracking.
API Validation
Testing and validating backend application interfaces (APIs) using Postman to verify proper requests, status codes, and JSON/XML data responses.
UI & Cross-Browser Testing
Analyzing visual and layout behaviors across different screens, operating systems, and browsers to guarantee high visual quality and seamless user experiences.
Software Development
Writing clean, scalable, and structured code using modern programming languages like Java and Dart (Flutter) to develop functional digital products.
Database & Query Testing
Utilizing relational databases and writing precise SQL queries to validate backend data integrity, data storage, and correct information retrieval.
Portfolio
A showcase of software engineering, quality assurance deployments, and innovative music technology solutions
- All Projects
- QA Manual & UI
- Music Software
- Software Engineering
- API & Databases
Testimonials
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"
The digital sheet music and books from PlayingHymns have completely transformed my weekly preparation. The purchasing process is seamless, and the automated PDF delivery works flawlessly every single time.
PlayingHymns Customer
"
Joel demonstrates a brilliant blend of technical engineering expertise and educational clarity. His software solutions for music education solve real-world problems with robust backend stability.
Academic Project Reviewer
"
Excellent implementation of enterprise-grade payment ecosystems. The integration of the Stripe API on Nueva ArmonĂa provides a secure, fast, and world-class checkout experience for digital assets.
E-Commerce & QA Analytics
The Piano Scroll application is a game-changer for my students. The interactive 'wait-for-note' learning feature via MIDI keyboard makes practicing engaging, intuitive, and highly structured.
Maria Teresa
Music Teacher
We requested a robust backend platform to manage our institutional resources, and Joel delivered a flawless MVC architecture using Node.js and PostgreSQL. Query performance is lightning-fast.
Francisco Suarez
Music Teacher
Finding high-quality digital hymnals with clean typography used to be difficult. The catalog encryption and instant download automation on his websites make buying music a great experience
Emily Davis
Church Music Director
Joel's attention to detail during software validation is outstanding. From backend API edge cases with Postman to cross-device mobile testing, he guarantees zero-critical-bug deployments.
Alejandro Ruiz
Senior QA Engineer & Consultant
Frequently Asked Questions
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What is your core specialization as a Systems Engineer?
I specialize in bridge engineering between development and quality assurance (Full-Stack and QA). My background allows me to design and develop robust backend systems using Node.js and PostgreSQL, build interactive mobile apps with Flutter, and implement thorough automated and manual testing strategies to ensure software stability.
What methodologies and tools do you implement for Software Testing?
I practice rigorous black-box testing techniques, including Equivalence Partitioning (EP) and Boundary Value Analysis (BVA). My core toolset includes Postman for RESTful API intercepting and data validation, Figma for pixel-perfect UI regression tests, and Chrome DevTools for cross-browser and adaptive layout verification.
What financial transaction ecosystems have you integrated into production sites?
I have successfully deployed commercial platforms like Nueva ArmonĂa and PlayingHymns, integrating both Stripe and PayPal REST APIs. My experience covers handling secure server-to-server webhooks, tokenized asset delivery, multi-currency processing, and securing raw data downloads.
How do you ensure optimal performance in relational database management?
I focus heavily on database schema normalization and query optimization. Using PostgreSQL, I implement resource-efficient strategies such as multi-client connection pooling (pg.Pool) and server-side pagination with precise constraints (LIMIT and OFFSET) to eliminate query latencies under heavy concurrent loads.
Do you have experience working under Agile methodologies and Git workflow standards?
Yes. I manage my source code and project versions using Git and GitHub following clean code conventions and modular structures. Additionally, my QA training has provided me with strong competencies in sprint planning, writing detailed test cases, and filing structured, high-priority Bug Reports.
Are you currently available for remote software engineering or QA opportunities?
Yes, I am fully available for remote, hybrid, or freelance contracts globally. My diverse experience managing hardware troubleshooting (like Hackintosh configurations), local servers, and international e-commerce platforms makes me highly adaptable to distributed, self-managed tech teams.
Contact
What clients, tech partners, and users say about my work and digital products
Contact Info
Get in touch for remote opportunities, software development projects, or QA engineering contracts.
Phone Number
+52 962 145 8135
Email Address
joel@alamillojuarez.com
Get In Touch
Have an opening for a software developer or QA engineer? Drop me a message to discuss how my technical skills can add value to your engineering team.