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$
USD
I will fix, maintain and modernize your legacy desktop application
Fer Basurto
About this gig
Struggling with an old desktop application that no one wants to touch?
Im a backend developer with experience maintaining and improving legacy systems across multiple technologies. I help businesses keep their applications running, fix issues, and extend functionality when needed.
What I can help you with:
- Fix bugs and errors in legacy applications
- Maintain and improve Windows Forms (.NET) applications
- Maintain and improve Java Swing applications
- Improve performance and stability
- Add small feature enhancements (export to Excel, new buttons, validations, etc.)
- Refactor and clean existing code
- Work with database-driven systems
️ Technologies I work with:
- C# / .NET / Windows Forms
- Java / Swing
- SQL Server and relational databases
️ Why work with me?
- Clean and maintainable code
- Focus on real business solutions
- Clear and professional communication
- Experience working with real-world legacy systems
️ Important
Legacy systems can vary a lot in complexity.
Please contact me before placing an order to define scope and avoid misunderstandings.
Large features or full modules may require a custom
Get to know Fer Basurto
Fer Basurto
Backend Developer especializado en APIs y dot NET
- FromMexico
- Member sinceJul 2026
- Avg. response time1 hour
Languages
Spanish, English
Desarrollador Backend con más de 5 años de experiencia en .NET y Java. Especializado en desarrollo de APIs REST, integración de sistemas (SAP, SAT, servicios externos) y automatización de procesos. He trabajado en soluciones empresariales complejas, optimizando rendimiento y creando microservicios escalables. Experiencia con SQL Server, MongoDB y arquitecturas limpias. Enfocado en entregar soluciones robustas, eficientes y de alto impacto.
My Portfolio
Other Software Development Services I Offer
FAQ
Do you work with existing or legacy systems?
Yes, I can work with existing older systems created on Windows Forms,Java Swing or ASP .NET
Do you provide support after delivery?
Yes, I can provide support and improvements if needed. Just let me know your requirements.
What do you need to start the project?
A clear description of your requirements, access to your system (if applicable), and any relevant documentation.
Can I contact you before placing an order?
Yes, and I highly recommend it. This helps avoid misunderstandings and ensures the best results.
