Freelancer profile translated to English.
Back to original languageAbout Alex
I collaborate with companies that have slow databases, Linux servers
If your system depends on SQL, Linux, or legacy code, the problem usually isn't in a single place.
It's typically a combination of poorly optimized queries, misconfigurations, and accumulated technical debt. That's where I come in.
I specialize in:
● Relational databases (MySQL, PostgreSQL, SQL Server)
● Linux servers (LAMP, Nginx, backend environments)
● Legacy software in PHP, Python, and Bash
I identify real problems in production systems: slow queries, bottlenecks, inefficient configurations, or hard-to-maintain code.
I perform technical audits, performance optimizations, and controlled migrations without jeopardizing the business.
✔ Faster systems
✔ Fewer incidents
✔ More stable architectures
✔ Fewer complaints from your client departments
I don't deal in theory. I work on live systems, with direct business impact, without halting any of your company's activities.
If your platform starts failing or doesn't scale, I can help you stabilize it and improve its performance.
Write to me and let's review your case.
I can analyze your system and tell you where the problem lies.
French
Conversational
English
Conversational
Spanish
Native or bilingual
Remote only
Primarily works remotely
Experience
- BLINKAYDBA SQL Server / PostgreSQLJune 2026 - Today (2 months)Administration and incident management in a 24x7 production environment for databases.Review of legacy code and how it can be optimized.
- ADMA SoftwareFreelance / ADMA SoftwareSOFTWARE PUBLISHINGMarch 2024 - Today (2 years and 5 months)Barcelona, SpainI focus on relational databases and developing/automating/creating APIs/scripts/programming, stabilizing and optimizing platforms, data migrations, and problem-solving...I am a decisive person who resolves incidents by knowing how to detect them at both the code and database levels.Errors, bottlenecks, optimization of the entire application lifecycle... from when the user clicks until it reaches the database and is displayed back to the user.I usually work with MySQL, PostgreSQL, SQL Server, but as companies have everything, I deal with any relational or NoSQL database that comes my way.Anything related to data and databases, SQL development, optimizations, backups, data loading, ETLs, data cleaning, data visualization dashboards, I can handle it.I develop with PHP (Laravel, CodeIgniter) / Python (Django, Flask) / Bash / SQL / JavaScript / jQuery / HTML / CSS, and as there's a bit of everything here, I've also worked on satellite applications in other languages like Ruby, C#, ASP.NET, VB, React, Vue...I work or have worked as DevOps with on-premise servers, Apache, Nginx, IIS without problems, as well as log management and process monitoring.And what about cloud, I currently work with AWS but have worked with Azure, Google Cloud... especially in Linux environments, although I'm also quite proficient with Windows.
- Sonosuite S.L.Team lead - Software EngineerINTERNET OF THINGS (IOT)February 2021 - October 2023 (2 years and 8 months)Barcelona, SpainIn this company, I performed the following tasks:- Stabilization of current legacy code by resolving incidents.- Decoupling of legacy code based on APIs, queues, and events.- Management of a small team (4/6).- Data cleaning.- Management of incidents related to data and databases.- Log management.- Optimization and indexing of tables.- Table modeling.- Tabular tables with Redshift.- Management of APIs that process data.- Data migration between different systems.Technologies: PHP / Ruby / MySql / AWS / Aurora MySql / Redshift / SNS / SQS / Agile
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Education
- Computer Engineering Management (unfinished)Universitat Autònoma de BarcelonaEstudios iniciados en el 1998 y no acabados, pendientes desde 2003. Obtuve una base académica y después opte por estudiar de forma autodidacta temas mas acordes con la programación, bases de datos e internet en general, materias que en la carrera no se daban.
- Course on SEO, search engine positioningFundación UNED2016
Certifications
- AZ-900: Microsoft Azure FundamentalsMicrosoft2021