Hi, I'm Leonel Mazzan
Engineering Leader and Senior Software Engineer specializing in the design and delivery of scalable, reliable digital platforms with hands-on experience across frontend, mobile, backend, and cloud architecture.
Who I Am
Senior software engineer focused on building, scaling, and stabilizing real-world digital systems. The work combines hands-on software development with technical leadership, prioritizing reliability, maintainability, and long-term impact.
Full-Stack Development
End-to-end development across web, mobile, and backend systems, with a strong focus on production readiness. Work emphasizes performance, scalability, maintainability, and the consistent application of proven engineering patterns to support long-term system evolution.
Engineering Leadership & Management
Technical leadership across teams and projects, including architecture definition, technical decision-making, estimations, roadmap planning, and delivery follow-up. Close collaboration with clients and stakeholders to translate business needs into clear technical solutions and prioritize features effectively.
Cloud Architecture & DevOps
Architecture and operation of reliable, secure, and efficient cloud infrastructures following industry best practices. Experience building and maintaining environments aligned with compliance standards such as SOC 2, GDPR, and PDPL, with a strong focus on security, observability, and operational stability.
Tech Stack
A collection of technologies I work with to build web applications and solve complex problems.
JavaScript
90%React.js
90%Next.js
80%React Native
70%Nest
90%Node.js
70%AWS
90%Cloudflare
80%Docker
60%SQL
65%NoSQL
40%Solidity
40%N8N
60%CrewAi
60%LangGraph
60%Python
50%Grafana
55%Git
90%SVN
90%Professional Experience
Companies and environments where I've worked as a software engineer and engineering lead, contributing to real-world systems in production.
SpaceDev
Engineering Lead / Senior Software Engineer
Engineering leadership and hands-on contribution across multiple projects in fintech, healthcare, and enterprise environments. Focused on architecture definition, cloud infrastructure planning, technical standards, and direct support in complex or high-risk scenarios.
Valtech
Senior Software Developer / Frontend Lead
Development of large-scale enterprise platforms for international clients across healthcare, payments, and logistics environments. Focused on frontend architecture, technical guidance, mentoring developers, and collaboration within distributed, multidisciplinary teams.
Aconcagua Software
Software Developer / Frontend Lead
Development of enterprise-grade financial and banking systems for national institutions within regulated environments. Focused on frontend architecture, scalability, system reliability, and collaboration on high-security platforms in production.
Let's Connect
I am part of SpaceDev, working across engineering leadership and hands-on development of large-scale digital platforms. Always open to conversations about technology, architecture, and collaboration.
Get in Touch