Gonzalo Sánchez Pla

With 15+ years of experience across banking, energy, and enterprise platforms in Europe, the US, and APAC, I solve the problems most teams avoid: undocumented systems, stalled migrations, fragile production environments, and codebases that have outgrown their original team.

What I do:

• Reverse engineer and document systems with little or no documentation

• Database migrations with validation, rollback strategy, and risk control

• Take over existing applications and deliver evolutions, fixes, new features, and modernization

• Build integrations between systems, including APIs, ETL pipelines, etc.

• Perform technical and security assessments truning unclear risk into a concrete action plan

• Extract, clean, and analyze data trapped in legacy structures or poorly documented databases

My approach is stack agnostic. I do not sell one language or framework. I specialize in understanding complex systems quickly and delivering working solutions. Whether the platform runs on .NET, Java, Python, React, PHP, SQL Server, PostgreSQL, Oracle, or a mixed environment, I focus on architecture, problem solving, and execution.

Recent example: I completed a full migration of a legacy database with 65+ tables, 66 views, and 10 stored procedures, including schema redesign, normalization, data transfer, validation, risk analysis, rollback strategy, and 51 migration scripts.

Ways to work together:

1. Technical Investigation or Health Check, 5 days, fixed price

2. Migration or Evolution Project, 2-6 weeks, fixed scope, fixed price

3. Ongoing Retainer for advisory, monitoring, and reactive support

Stack: SQL Server T SQL,PostgreSQL, .NET/C#, Java, Python, Bash, React, REST/SOAP APIs, ETL, CI/CD. Fully remote. English C2, Spanish native, Italian.

If your system has become a black box and you need someone who can take it over and deliver, I can help.