Web development
Applications with Next.js and React, using SSR/SSG, caching, lazy loading and code splitting to load fast.
FULL STACK · WEB · BACKEND · MOBILE
Gabriel Alencar.
Web, backend
& mobile.
Hi, I'm Gabriel Alencar.
Full Stack developer with 4+ years of experience. I build web applications, APIs and mobile apps with React, Next.js, NestJS and Node.js, from architecture to deploy.
DESIGN + DEVELOPMENTExplore. Get to know me. Let's create.
AREAS OF FOCUS
From interface to application logic.
4+ years working across every layer, from interface to infrastructure.
Backend & APIs
Secure REST APIs with NestJS and Node.js, JWT/OAuth2 authentication, PostgreSQL and MongoDB, and resilient integrations.
Mobile applications
Apps with Flutter and Firebase, monetization with AdMob and AppLovin, and real-time AI chat.
01 / EXPERIENCE
Where ideas
become delivery.
4+ years building products in technology teams, from backend to mobile.
- Product and development. Led and delivered end to end a complete ERP for pet shops in PHP, turning complex business rules into working features in a short, agile cycle.
- Data engineering and automation. Designed web scraping and bulk data bots with Python and Node.js, replacing manual work with automated collection.
- Infrastructure and cloud. Managed VPS servers and AWS environments and introduced Docker containers for stable, scalable and consistent deploys.
- Monetization and engagement. Built the app's monetization with AdMob, Meta, AppLovin and Wortise, using A/B tests and fallback, and grew engagement with automated campaigns and deep links via OneSignal.
- Architecture and AI. Implemented a real-time AI chat with moderation over WebSocket/Streams, applying Clean Architecture and SOLID.
- Mobile management and infrastructure. Managed the product lifecycle in Kanban, set up CI/CD pipelines, feature flags for the paywall and Firebase integrations (Auth, Firestore, Crashlytics and Analytics).
- Backend and APIs. Designed and scaled secure RESTful APIs with NestJS, with JWT/OAuth2 authentication and persistence in PostgreSQL and MongoDB.
- Frontend performance. Improved loading of Next.js applications by working on LCP and TTFB, with caching, lazy loading and code splitting.
- Quality and DevOps. Reduced production failures with CI/CD pipelines on GitHub Actions, automated tests with Jest and Cypress and steady code reviews.
- Resilience and integrations. Made external integrations more reliable with retries, timeouts and rate limiting, working in agile squads with Scrum and Kanban.
- Real-time systems. Built from scratch the platform's real-time channels (video, voice, chat and screen sharing) with WebSockets, Next.js and NestJS.
- Security and reliability. Ensured reliable message delivery and chat history with access policies, JWT authentication and active monitoring of metrics and logs.
- Agile delivery and CI/CD. Kept releases predictable with CI/CD pipelines and automations, working closely with product, design and QA.
- Mentoring and technical leadership. Sped up the learning of beginner classes in JavaScript, React, HTML/CSS and Git with pair programming sessions and ongoing technical support.
- Code review. Raised the quality of student work with rubric-based grading and code reviews focused on good practices and clean code.
- Management and follow-up. Mapped and reduced dropout risks with progress reports for the coordination team, using Notion and Google Sheets.
02 / ABOUT ME
Curiosity to
explore.
Care to create.
4+ years delivering software end to end, with performance, security and a product mindset.
I specialize in the JavaScript/TypeScript ecosystem (React, Next.js, NestJS and Node.js), with solid work in Python and PHP. I have built payment integrations, analytics dashboards, a complete ERP for pet shops, real-time AI chats and automation and web scraping bots.
I also manage infrastructure on AWS and VPS servers, with Docker and CI/CD pipelines, always applying Clean Architecture and SOLID. Today I work as a mobile developer at Lgmweb and study Computer Science at Estácio.
Let's build something together03 / TOOLS & POSSIBILITIES
A good idea.
The right tools.
The technologies I use every day, from frontend to infrastructure.I also work with Angular, Vue, MySQL, Firebase and Cypress.
01
Frontend & mobile
Interfaces with Next.js (SSR/SSG) and React, and apps with Flutter, focused on performance and metrics like LCP and TTFB.
02
Backend & data
REST APIs with NestJS and Node.js, real time over WebSocket, JWT/OAuth2 authentication and automation bots.
03
Cloud & quality
Docker, AWS and VPS, CI/CD pipelines and automated tests, with Clean Architecture and SOLID.
04 / THE NEXT CHAPTER
Have an idea in mind?
Let's give it shape.
A new project, an opportunity, or a good conversation.
The next step starts with hello.