Gonzalo A.
Senior Web Developer | Python, PHP, .NET, Frontend & Automation
I’m a senior web developer and IT professional with 20+ years of experience building, maintaining and improving websites, business applications, databases and internal tools. I help clients solve practical technical problems: fixing bugs, improving existing systems, creating automation scripts, working with APIs, processing data, updating legacy applications and building small tools that save time and reduce manual work. My background combines hands-on development, IT management and business understanding. This means I can work independently, understand requirements quickly, ask the right questions, and deliver solutions that are useful in real business operations — not just technically correct. My technical background includes: - Python scripting and automation - PHP development and maintenance - Classic ASP legacy application support - .NET / C# development - JavaScript, HTML and CSS - Frontend fixes and improvements - SQL Server, MySQL, Oracle and Access databases - API integrations - CSV, Excel and data processing workflows - Internal tools and business applications - Legacy system maintenance and modernization I’m especially comfortable working with existing codebases, old systems, undocumented workflows and business-critical applications that need careful, practical improvements. I can help you fix issues, clean up processes, automate repetitive tasks, improve performance, migrate small parts of a system, or simply make an existing tool easier to use and maintain. I also use modern AI-assisted development tools to speed up prototyping, debugging, documentation and workflow automation. I treat AI as a productivity tool, not as a replacement for professional judgment: every solution still needs proper review, testing and understanding of the business logic. In addition to my development background, I have extensive experience as an English-Spanish translator, editor and proofreader. This is especially useful for clients who need both technical and linguistic accuracy, such as: - Software localization - Website translation - SaaS content localization - Technical documentation - App and UI text review - AI-related content - Spanish proofreading and editing This combination of technical and language skills allows me to help with projects where code, product logic and communication all matter. Examples of tasks I can help with: - Create a Python script to automate a repetitive task - Fix bugs in a PHP, Classic ASP or .NET application - Improve an existing website or internal tool - Connect your system to an API - Clean, transform or validate CSV/Excel data - Build small admin tools or utilities - Review and improve legacy code - Document an existing workflow or system - Translate or localize your website, app or technical content into Spanish - Review Spanish UI text for accuracy, tone and clarity I’m reliable, detail-oriented and used to working independently. My goal is to understand your real business need and deliver a practical solution that works, is maintainable, and makes your day-to-day work easier. If you need someone who can combine senior technical experience, business understanding and clear communication, I’d be happy to help.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $182
Billed in all: $22,992$23k
$91 in the last 6 months
Across 7 contracts
Across 151 contracts
Earnings, last 30 days
Skill rankings: Top 26% in ASP
Ranked by MRR among everyone on Upwork with the skill.
- #45ASP174 freelancers · 🇪🇸 #1Top 26%🇪🇸#1 of 2
- #319Website Localization552 freelancers · 🇪🇸 #12Top 58%🇪🇸#12 of 19
- #444Castilian Spanish1,275 freelancers · 🇪🇸 #99Top 35%🇪🇸#99 of 309
- #621Technical Translation1,379 freelancers · 🇪🇸 #21Top 45%🇪🇸#21 of 47
- #662Functional Testing1,649 freelancers · 🇪🇸 #6Top 40%🇪🇸#6 of 11
- #682Content Localization1,586 freelancers · 🇪🇸 #33Top 43%🇪🇸#33 of 63
- #941Manual Testing2,261 freelancers · 🇪🇸 #10Top 42%🇪🇸#10 of 23
- #943English to Spanish Translation2,468 freelancers · 🇪🇸 #105Top 38%🇪🇸#105 of 323