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Sebastian Guevara

@sebastianguevara

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Full Stack Developer with 5+ years shipping production web systems, APIs, and automations using Python and JavaScript.

Argentina

Message

What I'm looking for

I’m looking for a role where I can own end-to-end delivery—from ambiguous requirements to production—and build reliable APIs and integrations. I want a team that values quality (testing, documentation) and uses automation and agentic tooling to ship fast without breaking trust.

I’m a Full Stack Developer with 5+ years of experience building and shipping production web systems, backend services, API integrations, and automation workflows. I take ownership from ambiguous requirements through implementation, debugging, testing, documentation, and production delivery. I also use Claude Code, Codex, and MCP as part of an agentic development workflow to accelerate API development, integrations, refactoring, and operational tooling while validating every result.

As Team Lead - Full Stack Developer at Municipalidad de Corrientes, I designed and maintained high-availability municipal services and APIs with Express, PostgreSQL, Redis, Next.js, and React Native, and I automated the license renewal process—reducing operational workload by 70%. I’ve also refactored production platforms (improving load times by up to 60%), built backend features with .NET/C# and SQL Server, and shipped data-driven web work for the CONICET soil moisture project using Python with H5/HDF5 and SQL Server. Beyond that, I co-founded Quadro and Minuto 90 Score, owning backend, frontend, UX, and infrastructure from requirements through production delivery.

Experience

Work history, roles, and key accomplishments

Current

Co-founder and Full Stack Developer

Current

Quadro

May 2026 - Present (2 months)

Co-founded and built a multi-tenant padel tournament SaaS covering online registration, payment flows, fixtures, CRM, and WhatsApp notifications. Owned backend, frontend, UX, and infrastructure from requirements through production delivery on a self-managed VPS.

Next.js PostgreSQL Redis Python CRM

Current

Co-founder and Full Stack Developer

Current

Minuto 90 Score

Oct 2025 - Present (9 months)

Co-founded and developed a real-time sports results platform with ingestion, normalization, and persistence of external provider feeds. Implemented asynchronous processing and supports high-traffic public pages using Svelte/SvelteKit.

Svelte SvelteKit Data Ingestion Persistence Asynchronous Feed Integrations Real Time Data Platforms

Current

Team Lead - Full Stack Developer

Current

Municipalidad de Corrientes

Feb 2024 - Present (2 years 5 months)

Designed and maintained high-availability municipal services and APIs using Express, PostgreSQL, Redis, Next.js, and React Native. Automated the license renewal process, led code reviews, and coordinated production deployments.

PostgreSQL Redis Next.js React Native API Development Automation Code Review

Full Stack Developer

CONICET

Aug 2024 - Nov 2025 (1 year 3 months)

Analyzed and processed SMAP/SMOS satellite data for soil moisture, drought, and precipitation. Developed a results web platform using Python, H5/HDF5, SQL Server, Protobuf, and Vue.

Python SQL Server Protobuf Data Analysis Data Processing

Full Stack Developer

Dinatech

Oct 2022 - Dec 2023 (1 year 2 months)

Implemented API features and integrations across production web applications using React, PHP, Redis, and PostgreSQL. Refactored an agricultural platform to improve load times and supported delivery within agile remote teams.

React PHP Redis PostgreSQL API Integration Refactoring Agile Production Support

Backend Developer

Yugoo

Aug 2021 - Oct 2022 (1 year 2 months)

Developed backend services focused on performance, scalability, and maintainable code using .NET, C#, and SQL Server. Contributed to service integrations and API evolution for products with an Angular frontend.

.NET C#SQL Server Backend Development Scalability Angular