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Mario Lucas
Available for work

Full Stack Engineer.

Full Stack Software Engineer specializing in Next.js, Node.js, TypeScript, and AWS. I build real production systems, from architecture to deployment.

Contact me
3+Years exp.
20+Projects
10+Happy clients
mario — zsh
~
100/100PageSpeed
0.8sLCP
Top 2%Codewars
17+Repos

Engineer who delivers

real systems.

I am a full stack engineer with a solid foundation in algorithms and data structures, GPA 9.09 at IFCE, and top 2% global on Codewars. For the last 6 months, I was the sole technical lead for the software ecosystem at Faculdade CECAPE: product, architecture, and cloud infrastructure. Before that, I spent almost 3 years at Kenzie Academy doing code reviews for over 450 projects and solving 1,650+ technical tickets, giving me a rare ability to read, debug, and evolve any codebase.

100/100PageSpeed Score
0.8sLCP in production
17+Structured Repositories
3+Years of experience
Mario Lucas
Mario Lucas — Full Stack Engineer
Open to work

Where I built what I know.

Arquiteto e entrego sistemas do zero à cloud.

Full Stack Engineer · WorkNOW
Set 2025 — Presente
TypeScriptNext.jsNode.jsPostgreSQLRedisAWSDDD
  • DDD com bounded contexts

    auth, publications, academic, metadata — 3 para 6+ models sem regressão entre domínios.

  • EventBus tipado e customizado

    Subscribers assíncronos de auditoria, indexação e stats liberando o request principal instantaneamente.

  • Full-Text Search nativo

    tsvector + índice GIN no PostgreSQL via Prisma — busca performática sem Elasticsearch.

  • Infraestrutura AWS segura

    VPC · subnets privadas · RDS sem IP público · IAM least privilege · S3 com Bucket Policy.

  • 100/100 PageSpeed Insights

    Calculadora e Simulador ENEM com LCP 0,8s · TBT 30ms.

  • 17 repositórios estruturados

    engineering-handbook, nextjs-template, express-template, local-dev-kit (Docker + Traefik HTTPS).

100/100PageSpeed
0.8sLCP
450+Reviews
1650+Chamados
17Repositórios
Top 2%Codewars
Top 2% GlobalCodewars — Global ranking

What I build and how I do it.

From idea to production product, with real code quality, security, and performance.

  • Architecture

    Systems that scale.

    Domain-Driven Design with bounded contexts and Feature-Sliced Design on the frontend, code that new devs can navigate without fear.

    PRESENTATIONAPPLICATIONDOMAIN & DATA
  • Cloud

    AWS in production.

    VPC with private subnets, RDS without public IP, App Runner with VPC Connector, S3 with restrictive Bucket Policy, and IAM with least privilege. Real security, not just deploy.

  • Backend

    Secure and typed APIs.

    Node.js with Express, strict validation via Zod, JWT authentication with access and refresh tokens, rate limiting, and centralized error handling.

  • Database

    PostgreSQL beyond the ORM.

    Native Full-Text Search with tsvector and GIN index, atomic transactions in complex aggregates, and relational modeling that guarantees data integrity.

  • Performance

    Real Core Web Vitals.

    0.8s LCP and 30ms TBT in production. Not a benchmark, it's an application accessed by students on slow connections in rural Ceará.

  • Code

    Code review is my foundation.

    Almost 3 years evaluating 450+ projects and solving 1,650+ technical tickets. I read anyone's code and find the problem, fast.

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