Open to opportunities

mario Igor

@marioigor

Message

I’m a Senior full-stack engineer shipping end-to-end features and distributed systems at scale.

Brazil

Message

What I'm looking for

I’m looking for a team where I can own end-to-end features, design scalable BFF/SdUI and microservices, and use AI-assisted development with rigorous testing to ship reliable, observable systems.

I’m a Senior Full Stack Engineer with 7 years of experience delivering end-to-end features in fast-paced, ambiguous environments. I design and operate distributed systems at scale, with hands-on ownership from frontend to backend architecture—building backend-heavy systems that power 100+ microservices (30M+ monthly requests, sub-100ms P99).

I apply AI pragmatically to accelerate development while maintaining strict human validation, testing, and production reliability. At Tractian, I engineered a Node.js BFF layer with circuit breakers and distributed tracing, processed 20M+ monthly events into audit timelines for 15+ teams, improved observability (Datadog; MTTR reduced 35%), and led mobile SDUI foundation work with Flutter/Dart. Earlier, I led a team of 10+ engineers, strengthened stability to 99.8% crash-free sessions, and automated CI/CD to cut deployment time by 60%.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Software Engineer

Current

Tractian

Nov 2024 - Present (1 year 6 months)

Engineered a Node.js BFF layer orchestrating 100+ microservices to handle 30M+ monthly requests with sub-100ms P99 latency. Owned end-to-end full-stack delivery (React UI, TypeScript/Go/C# APIs) and improved observability with Datadog, reducing MTTR by 35%.

Node TypeScript Go C#React Backend For Frontend (BFF)Circuit Breakers OAuth 2.0 Datadog

Mobile Software Engineer

Tractian

Jul 2024 - Nov 2024 (4 months)

Built Server-Driven UI (SDUI) foundations with Flutter and Dart to deliver real-time updates without app store releases. Refactored legacy UI across 12+ screens, reducing inconsistencies by 70% and accelerating time-to-market.

Flutter Dart Server Driven UIs Real Time Updates State Management Testing CI CD

Technical Lead, Full Stack

FCS Suite

Jul 2021 - Jul 2024 (3 years)

Led a 10+ engineer team delivering B2B applications under tight timelines, improving stability to 99.8% crash-free sessions. Designed offline-first architecture adopted company-wide, built a route optimization system using clustering/geospatial methods, and reduced deployment time by 60% via automated CI/CD.

Mobile And Offline First Architecture CI CD Pipelines Python Java Microservices Clustering Automated Testing

IT Infrastructure Analyst

ABC Technology

Oct 2019 - Jul 2021 (1 year 9 months)

Developed Python and Shell automation scripts, reducing manual effort by 75%. Enabled secure remote work for 200+ employees using zero-trust architecture.

Python Shell Scripting Automation Zero Trust Architecture Infrastructure Operations Scripting Access Control Troubleshooting