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Marlon Harnisch

@marlonharnisch

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Senior Full Stack Engineer specializing in scalable cloud-native systems and team leadership.

Brazil

Message

What I'm looking for

I seek senior engineering roles where I can lead end-to-end cloud-native projects, mentor teams, and build scalable, reliable systems with strong DevOps and IaC practices.

I am a Senior Full Stack Engineer with 15+ years designing, building, and operating cloud-native, high-scale applications using TypeScript, Node.js, React, Java, Spring, and AWS serverless architectures. I lead end-to-end delivery of APIs, event-driven services, and data-driven dashboards for platforms serving millions of users, and I prioritize scalable architectures, clean code, and mentoring engineering teams.

Throughout my career I have driven architectural decisions, built reliable backend systems for shipment tracking, financial platforms, and public-safety applications, and implemented infrastructure-as-code and CI/CD practices. I deliver measurable impact—improving process celerity, enabling high-throughput microservices, and increasing team productivity—while focusing on performance, reliability, and operational excellence.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

Quiet Platforms

Jan 2023 - Present (3 years 1 month)

Led design and delivery of full-stack solutions (Node.js, TypeScript, React, Java) for a U.S. logistics platform, building scalable APIs and event-driven services for shipment tracking and reporting used by enterprise clients.

Node TypeScript React Java AWS Lambda API Gateway DynamoDB Serverless Event Driven Architecture

Senior Full Stack Engineer

Invillia

Aug 2019 - Jan 2023 (3 years 5 months)

Led backend and serverless development for large-scale financial platforms handling billions of requests daily, deploying Lambda/API Gateway/DynamoDB solutions and event-driven microservices serving over 50M clients.

AWS Lambda API Gateway DynamoDB Kafka Terraform Event Driven Architecture Microservices

Senior Fullstack Engineer

PD Case

Feb 2015 - Aug 2019 (4 years 6 months)

Implemented intelligence and process-tracking systems using Java, Spring, AngularJS/TypeScript and SQL, improving electronic process celerity by ~70% and increasing team productivity.

Java Spring AngularJS TypeScript SQL System Design Performance Optimization Integration

Full Stack Engineer

Impulso Network – Sobtic

Jan 2018 - Dec 2018 (11 months)

Developed security-focused frontend (Angular, TypeScript), backend services (Go, Java) and an Android app to handle emergency requests and real-time field communications in a remote team.

Angular TypeScript Go Java Android Real Time Systems API Integration Remote Collaboration

Java Developer

Digitro Tecnologia

Sep 2012 - Feb 2015 (2 years 5 months)

Built mission-critical public safety and GIS platforms using Java and web technologies, contributing to real-time monitoring systems used in national security operations including the 2014 FIFA World Cup.

Java GIS Web Technologies Relational Databases Monitoring System Integration

Full Stack Developer

MK Servicos Contabeis

Jan 2010 - Sep 2012 (2 years 8 months)

Established the IT area and developed internal intranet and electronic document management (GED) systems using Java and web technologies, reducing operational costs and improving process efficiency.