I'm Rio Ananda (dodevca)

Freelance Back‑End Developer focused on system architecture, API engineering, and microservices design. I build scalable, reliable, and cost‑efficient infrastructures for modern web platforms.

Important

Currently shifting focus to NLP & data mining research.

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Value Proposition

I help founders and small businesses turn ideas into maintainable systems. My focus is on back‑end reliability, clean architecture, and long‑term scalability, not just visual polish.

What I Do

• Architect and develop Admin Dashboards, CMS, Microservices, and Database Architectures.
• Integrate 3rd‑party services: Payment Gateways, Cloud Storage, OAuth, Mailing Systems.
• Refactor and migrate legacy systems to modern frameworks.
• Optimize websites for performance (LCP, TTFB, SEO).
• Provide post‑launch maintenance and retainer support.

Core Skills

• System Architecture: Microservices, CQRS, and modular monolith designs.
• API Engineering: RESTful APIs, rate‑limiting, OpenAPI specs, OAuth2.
• Database Design: MySQL & MongoDB, query tuning, indexing strategy.
• Caching & Queues: Redis for caching, sessions, and background jobs.
• Integrations: Midtrans, Xendit, Gmail API, Google Maps, OAuth.
• Security: XSS/CSRF protection, input validation, access control.
• DevOps: VPS + Nginx deployments, Docker containers, GitHub Actions CI.

Tech Stack

Languages: PHP, JavaScript, Python
Frameworks: Laravel 12, CodeIgniter4, Node.js (Express.js)
Databases: MySQL, MongoDB
Caching/Queues: Redis Infrastructure: VPS, Nginx, Docker, GitHub Actions
Integrations: Midtrans, Xendit, Cloudflare R2, Gmai, Google Maps, OAuth2
Front‑end: Blade, EJS, jQuery, Vue
Security: Session, JWT, OAuth2, OTP

Architecture & Practices

• API‑first design with documented OpenAPI specs.
• Microservices communication with token‑based authentication.
• Modular data flow using CQRS and CRUD separation.
• Performance‑driven architecture with caching layers and rate limits.
• Compliance‑minded: familiar with COBIT framework for IT audit readiness.

Selected Work Examples

(details simplified for confidentiality)

• CMS: modular content workflows with analytics.
• E‑Approval Dashboard: hierarchical role‑based system.
• Sales Management Dashboard: integrated with third-party API.
• File Management Platform: Cloudflare R2‑based storage system.
• NFT & Token Landing Pages: integrated with Metamask and Trust Wallet.
• Chrome Extension: file‑transfer automation and dashboard integration.

How I Work

1. Design architecture and ERDs based on business flow.
2. Develop clean, testable modules with clear data contracts.
3. Deploy via Docker/Nginx to VPS or containerized environments.
4. Monitor and optimize system performance post‑launch.
5. Support for one month after deployment (bug‑fix guarantee).

Work Principles

• Backend‑first focus. I don’t overengineer front‑end frameworks unless needed.
• Clean code over speed. Systems should be maintainable years later.
• Data integrity is priority. Architecture comes before UI.

What I Don’t Do

• Full UI/UX design or front‑end heavy SPA development.

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Crafting Systems Beyond Visuals