FireflyFolio

About

With 20+ years in development, I help teams turn ideas into reliable, readable, and scalable products. I keep learning continuously, adapt to existing environments, and favor pragmatic efficiency: focus on the essentials without sacrificing quality.

💼 What I do

  • Full-Stack Development – Modern apps with Node.js, React, Next.js, Vue, Angular; modular architectures (Clean/Hexagonal), state & data (Redux/Zustand/TanStack Query).
  • APIs & BackendsREST/GraphQL, auth, caching, WebSockets, testing, observability, and scale-out.
  • Front-end EngineeringTypeScript, Tailwind CSS, design systems, a11y, i18n, Core Web Vitals performance, SSR/ISR/Edge.
  • Data & StoragePostgreSQL, MySQL, SQLite, MongoDB, Redis, search (Algolia/Meilisearch), files/queues.
  • CI/CD & DeliveryGitHub Actions, Docker/Compose, Linux/Nginx, migrations and rollbacks.
  • Quality & SecurityJest/Vitest, Testing Library, Playwright/Cypress, ESLint/Prettier, code reviews.
  • ObservabilitySentry, OpenTelemetry, structured logs, metrics & alerts.

🧭 How I work

  • Adaptation first: I adopt your tools, conventions, and pipelines before proposing focused improvements.
  • Continuous upskilling: tech watch, prototypes, concise docs, and knowledge sharing.
  • Efficiency & productivity: automation (CI/CD, scripts), reusable templates, managed technical debt.
  • Responsible AI: Copilot and ChatGPT (GPT-5) as accelerators for analysis and docs — assistants, not replacements.

🔧 Toolbox (selection)

Languages & Runtime

  • TypeScript/JavaScript • Node.js • Java • Python • Go • Rust • C++

Front-end

  • React • Next.js • Vue • Nuxt.js • Angular • Tailwind CSS • Storybook • i18n • a11y

Back-end & APIs

  • NestJS • Spring • GraphQL (Apollo) • tRPC • Auth (JWT/OAuth) • Caching (Redis)

Data

  • PostgreSQL • Redis • Prisma • Drizzle • Kafka • RabbitMQ • MongoDB • SQLite

CI/CD & Ops

  • Docker/Compose • GitHub Actions • Linux/Nginx

Quality & Observability

  • Jest • Vitest • Testing Library • Playwright • Cypress
  • ESLint • Prettier • Sentry • OpenTelemetry

Everyday tools

  • VS Code • GitHub • Postman/Insomnia • PM2 • Copilot • ChatGPT

🤝 Let’s work together

Interested in collaborating? Contact me on LinkedIn to discuss your project.

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