~30%
Reduced bug escape rate through improved testing culture and code review practices
Grupo Boticario
Senior Fullstack Engineer
Jonas Emanuel
Building Scalable, Thoughtful Digital Products
I design and ship reliable systems across frontend, backend, and cloud — with experience spanning high-traffic media, retail platforms, and modern AI-enabled workflows.
- Proof point
- 11+ years
- Proof point
- Millions of users
- Proof point
- Frontend to cloud
Available for senior roles
Architecture, delivery, performance, and product collaboration.
Proof
Selected Impact
Measurable outcomes from production systems, not vanity project screenshots.
~50%
Cut critical promotions grid load time by optimizing data fetching and rendering
Grupo Boticario
Millions
Built and maintained software systems serving millions of users
Globo / Globoplay
End-to-End
Delivered full technical ownership from architecture design through production launch
Trajectory
Experience
2022 — Present
Senior Fullstack Engineer Grupo Boticario
Core platform team responsible for promotions and pricing engines serving Brazil's largest beauty retail ecosystem.
- Led architecture and development of a high-performance promotions grid, reducing load times by ~50%
- Drove testing culture improvements that reduced bug escape rate by ~30%
- Collaborated with product and design to ship features used by millions of customers
Next.jsReactTypeScriptNode.jsAWSKubernetesPostgreSQLKafka
2020 — 2022
Fullstack Engineer Globo / Globoplay
Brazil's largest media company. Worked on Globoplay, the leading streaming platform in Latin America.
- Built backend services powering content discovery and user personalization at scale
- Improved API performance and reliability for millions of concurrent users
- Contributed to frontend architecture decisions for the web platform
Node.jsTypeScriptReactGraphQLAWSRedisMongoDB
2019 — 2020
Frontend Engineer Loft
High-growth proptech startup transforming the real estate market in Brazil.
- Developed customer-facing web applications for property search and transaction flow
- Built internal tools that streamlined operations across multiple teams
- Worked in a fast-paced, data-driven environment with continuous deployment
ReactTypeScriptNext.jsNode.jsPostgreSQL
2016 — 2019
Fullstack Developer Fulllab
Digital agency delivering e-commerce and web platforms for major Brazilian brands.
- Led development of e-commerce platforms handling high traffic volumes
- Architected fullstack solutions from database design to frontend implementation
- Mentored junior developers and established coding standards
AngularVue.jsNode.jsMySQLDockerCI/CD
2014 — 2016
Software Developer Earlier Roles
Started career building web applications and learning fullstack development fundamentals.
- Built and maintained web applications using modern JavaScript frameworks
- Established foundation in clean architecture and test-driven development
JavaScriptPHPMySQLHTML/CSS
Systems
Technical Range
Frontend
Next.jsReactVue.jsAngular
Backend
Node.jsTypeScriptGraphQLRESTFastifyNestJSExpress
Cloud & Infra
AWSKubernetesDockerTerraformHelm
Data & Messaging
KafkaRabbitMQRedisPostgreSQLMongoDBMySQLGlue
AI Tooling
Claude CodeCopilotCursorOpenRouterMCP
Practices
SEOA11yCI/CDClean ArchitectureTDDMicroservicesAgile
Operating Mode
Working Style
01
Technical Clarity
I believe complex systems deserve clear explanations. I bridge the gap between architecture decisions and team understanding.
02
Product Collaboration
Engineering exists to serve users. I work closely with product, design, and business teams to ensure we build the right things, not just things right.
03
Performance & Maintainability
Fast, reliable, and easy to change — these three qualities define great software. I optimize for all three in every project.
04
Accessibility & Quality
The web should work for everyone. Accessibility and quality are not afterthoughts in my work; they are foundational requirements.
05
AI as Leverage
I use AI tooling to amplify engineering velocity, but never as a substitute for sound judgment, architectural thinking, and human collaboration.
Contact
Let's Talk
I'm open to senior engineering roles, technical leadership opportunities, and meaningful collaborations.