Available to hire
Hi, I’m Jonatas Kistenmacker, a Full Stack Software Engineer based in Rio de Janeiro, Brazil. I design and deliver scalable, user-focused software solutions, mentor teammates, and drive delivery speed while keeping business needs in focus.
I love turning complex requirements into robust architectures, building secure APIs, and championing clean code, CI/CD practices, and reliable deployments. When I’m not coding, I enjoy sharing knowledge with my team and helping products reach their full potential.
Skills
Language
English
Fluent
Portuguese
Fluent
Work Experience
Lead Software Engineer at Brilliant Machine
December 1, 2023 - PresentDesigned and delivered digital solutions from loose requirements, leading system design and ensuring production-ready, scalable, user-focused applications. Redefined software architecture and coding standards across projects, reducing integration errors, simplifying onboarding, and doubling delivery speed. Implemented API contract-driven development with JSON Schema to enable parallel frontend and backend work, cutting blockers and improving delivery timelines. Drove Docker adoption and secure AWS deployments, reducing vulnerabilities and ensuring stable production-ready environments. Mentored engineers from junior to mid-level, introduced PR workflows, one-on-ones, client requirement refinements, and daily syncs— boosting team collaboration, productivity, and performance.
Fullstack Software Engineer at Brilliant Machine
January 1, 2024 - September 17, 2025Built a new customer-facing system from the ground up, migrating workflows from paper to digital and improving speed, reliability, and user experience. Developed a robust .NET API using Entity Framework and Oracle with clean architecture (endpoints, services, and database layers), reducing development time by 50% and supporting business-critical systems. Delivered an email automation feature with customization options used daily by 100+ users, reducing manual work by ~90% and streamlining customer operations. Supported data engineering efforts by designing scalable structures for interconnected systems and APIs, improving system integration and maintainability. Contributed to Docker containerization and deployment practices for secure, production-ready applications.
Fullstack Software Engineer at Brilliant Machine
December 1, 2023 - January 1, 2026Designed and delivered digital solutions from loose requirements, leading system design and ensuring applications were production-ready, scalable, and user-focused. Redefined software architecture and coding standards across projects, reducing integration errors, simplifying onboarding, and doubling delivery speed. Implemented API contract-driven development with JSON schemas, enabling frontend and backend teams to build in parallel, cutting blockers and improving delivery timelines. Drove Docker adoption and secure AWS deployments, reducing vulnerabilities and ensuring stable, production-ready environments. Mentored engineers from junior to mid-level, introduced PR workflows, one-on-ones, client requirement refinements, and daily syncs— boosting team collaboration, productivity, and performance.
Fullstack Software Engineer at Brilliant Machine
October 1, 2021 - January 1, 2024Built a new customer-facing system from the ground up, migrating workflows from paper to digital and improving speed, reliability, and use r experience. Developed a robust .NET API using Entity Framework and Oracle with clean architecture (endpoints, services, and database layers), reducing development time by 50% and supporting business-critical systems. Delivered an email automation feature with customization options used daily by 100+ users, reducing manual work by ~90% and streamlining customer operations. Supported data engineering efforts by designing scalable structures for interconnected systems and APIs, improving system integration and maintainability. Contributed to Docker containerization and deployment practices for secure, production-ready applications.
Education
Bachelor of Computer Software Engineering at Unicesumar
January 11, 2030 - December 1, 2024Bachelor's Degree in Computer Software Engineering at UNICESUMAR
February 1, 2021 - December 1, 2024Bachelor of Computer Software Engineering at Unicesumar
February 1, 2021 - December 1, 2024Qualifications
Industry Experience
Software & Internet, Professional Services, Computers & Electronics
Skills
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