Open to opportunities

Julián Viso

@julinviso

Message

I build .NET trading, healthcare, logistics, and e-commerce applications.

Argentina

Message

At FyO, I develop and evolve financial trading and contract-management systems processing approximately 150 contracts daily, building C#/.NET backend services and REST APIs while optimizing SQL Server performance. I also support Azure deployments and CI/CD processes within a 15-person agile team.

Previously at Redjar, I modernized telemedicine, ERP, e-commerce, and logistics platforms—from migrating .NET 5 to .NET 9 and Ionic 6 to 8, to reducing MySQL report times from one minute to 15 seconds. I work across backend, frontend, cloud migrations, Docker, and microservices, and recently incorporated spec-driven agentic workflows with opencode and MCP servers.

Experience

Work history, roles, and key accomplishments

Current

Semi Senior Full Stack Developer

Current

FyO

Jan 2025 - Present (1 year 7 months)

Part of a 15-person team developing and evolving a financial trading platform and internal systems for a leading grain market. Develops and maintains enterprise applications with C# and .NET, designs REST APIs, optimizes SQL Server databases, and implements new features for trading and contract management modules.

C#.NET REST APIs SQL Server CI CD Agile OpenCode MCP Servers

Semi Senior Full Stack Developer

Cooperativa de Trabajo Redjar LTDA.

Aug 2021 - Dec 2024 (3 years 4 months)

Involved in the full software development lifecycle across multiple projects for external clients, contributing to architecture decisions, backend and frontend development, cloud infrastructure, DevOps processes, and technical mentoring. Worked on projects including a telemedicine platform, an event-management ERP, an e-commerce platform, and a logistics platform.

C#.NET Angular Ionic PHP MySQL Docker CI CD Clean Architecture REST APIs React Native Google Cloud Platform

Full Stack Developer

Freelance

Jan 2021 - Mar 2021 (2 months)

Built a full-stack blogging platform integrated with a CMS for an external client. Developed the frontend in Next.js and backend services in Node.js, implemented PostgreSQL as the database, and deployed the application on Digital Ocean using Docker.

Next.js Node PostgreSQL Docker Data Ocean