Aditya Firmansyah
Senior Software Engineer — Scalable Platforms & AI Workflows
Thirteen-plus years architecting resilient web platforms, distributed microservices, and autonomous AI workflows — building scalable systems from zero to production.
Manifest — Contents Declaration
About
Software engineer with 13+ years designing and building scalable web, backend, and mobile applications. Experienced across the full development lifecycle with TypeScript, Python, React, Next.js, FastAPI, Node.js, and NestJS. Proven track record shipping enterprise logistics platforms, microservices, and cloud-native applications deployed on Kubernetes. As Founder & Lead Architect of Dagango, now building a high-scale multi-tenant e-commerce platform and tooling suite with autonomous AI agent workflows integrated throughout. Strong advocate for clean architecture, code quality, and collaborative engineering.
Cargo Manifest — Technical Payload
Skills
Languages
Frontend
Backend
CMS
Platform & AI
Infrastructure
Databases
Practices
Cargo Log — Personal Freight
Featured Projects
Cargo Dispatch Terminal — Select a waybill ticket from the manifest to inspect full architecture and stack payload:
Founder & Lead Architect — Next.js + FastAPI
Dagango Multi-Tenant E-Commerce Platform
Multi-tenant e-commerce platform built for independent merchants and modern dropshipping. Powers isolated merchant storefronts with host-based tenant resolution, dynamic OKLCH color token theming, sub-second product search, bulk CSV catalog operations, and automated SEO metadata generation.
- Architected a high-performance monorepo: Next.js App Router frontend paired with a FastAPI (Python 3.11) backend and PostgreSQL database with host-level tenant isolation behind Cloudflare proxying.
- Engineered merchant storefront customization with dynamic OKLCH color spaces, zero-network self-hosted Google font subsets for deterministic CI, and synchronized bilingual localization (ID/EN).
- Designed resilient data pipelines including atomic bulk CSV product imports with SQLAlchemy session protection, multi-provider payment reconciliation, and background worker queues.
Open-Source Build — FastAPI + React TS
Kas Transparan Civic Treasury & Dues Management
Open-source civic trust and neighborhood treasury system built for Indonesian RT/RW communities. Provides public financial transparency with no login required, self-check dues portal for residents, multi-month arrears detection, batch/advance payment processing, and granular role-based governance.
- Architected multi-tenant backend in FastAPI (Python 3.11) with strict PIC-based dues ownership and role segregation (Admin/Bendahara vs. Ketua approval workflow), backed by 85+ automated Pytest tests and zero-dependency XLSX/CSV reporting.
- Engineered modern, accessible frontend using Vite, React 19, TypeScript, and Tailwind CSS — featuring civic-trust design language, responsive compact mobile metrics, and sub-second phone-number lookup portal for residents.
- Production-deployed to VPS with Nginx reverse proxy, systemd daemon isolation, Let's Encrypt SSL, and automated CI pipelines enforcing strict Ruff and TypeScript quality gates.
Solo Build — Full-Stack Rust
GainForge Gamified Fitness RPG
GainForge turns real workouts into RPG quests — users earn XP, level up a character, and grow four stats (STR, END, AGI, FLX) by completing daily strength, cardio, flexibility, and endurance sessions. Built solo end-to-end: product design, schema, API, frontend, and production deployment.
- Full Rust stack front-to-back — Leptos (WASM) frontend and an Axum backend share a single DTO crate, keeping types identical across client and server.
- Designed the quest/XP/leveling system and a 4-stat character model, plus an admin panel for managing training programs, exercises, and weekly schedules.
- Shipped and self-hosted on a VPS with Docker and PostgreSQL — 15 schema migrations, 100+ commits, with iterative mobile-UX polish (drawer navigation, responsive schedule grid).
Solo Build — Full-Stack JavaScript
Cover Letter Generator AI Cover Letter Tool
Users build a profile (skills, bio, experience), type in a job title and description, and get a tailored, editable cover letter back. Originally built Upwork-specific with URL-based job scraping; broadened to a general-purpose tool once Upwork shipped its own in-house AI proposal writer, making an external Upwork-only tool redundant.
- User profile and job details feed a prompt builder that calls an LLM API to draft the letter, followed by a humanization pass that strips AI-writing tells (em dashes, buzzwords, promotional filler) before the user reviews and saves it.
- Full auth/profile/letter-history schema in PostgreSQL (users, profiles, projects, cover_letters with draft/saved status) behind JWT auth.
- AI backend (endpoint + model) is env-configurable rather than hardcoded — swapped providers in production without a code change when the original vendor's model was discontinued. Self-hosted via git-push deploy (bare repo + post-receive hook + systemd + nginx).
Shipment History — Tracking Log
Career Experience
Interactive Tracking Manifest — Current role open by default; click any shipment to inspect full deliverables & stack:
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Founder & Lead Architect — Dagango
Active Role ↓- Architects and scales Dagango, a high-performance multi-tenant e-commerce platform (Next.js App Router, FastAPI Python monorepo, PostgreSQL) with host-level tenant isolation behind Cloudflare proxying.
- Engineered merchant storefront customization with dynamic OKLCH color spaces, zero-network self-hosted Google font subsets, and sub-second product search.
- Designed resilient data pipelines including atomic bulk CSV catalog imports with SQLAlchemy session protection, multi-provider payment reconciliation, and background worker queues.
- Builds and operates autonomous multi-agent engineering workflows with deterministic verification gates, sandboxed tooling, and headless test runners for continuous ops, code reviews, and audits.
- Deploys and maintains high-availability self-hosted Linux VPS environments using Nginx, systemd daemons, and Caddy routing with 99.9%+ uptime.
Next.jsFastAPITypeScriptPythonPostgreSQLAI AgentsDockerTailwind CSS -
CTO — GOSG Consulting
View Specs ↓- Directed technology strategy and oversaw engineering delivery for client commercial e-commerce platforms using Medusa, Next.js, and Node.js.
- Architected and integrated autonomous AI agents and custom LLM workflows into client applications, automating operational pipelines, content generation, and intelligent user interactions.
- Led technical SEO architecture and engineered proprietary automated tooling to audit site health, structured schemas, and crawl efficiency.
- Instituted engineering quality standards — enforcing RED-GREEN-REFACTOR TDD, zero-trust pull request reviews, and automated CI pipelines across frontend and backend monorepos.
- Spearheaded DevOps and server provisioning on self-hosted Linux VPS environments, establishing CI/CD deployment pipelines, Nginx reverse proxy routing, and systemd daemons with 99.9%+ availability.
- Mentored engineering talent, guided architectural spikes, and translated complex enterprise requirements into maintainable, production-ready full-stack software.
MedusaNext.jsNode.jsTypeScriptDevOpsAI AgentsLLMsPostgreSQL -
Software Engineer — pickupp, Singapore
View Specs ↓- Architected and delivered 6 core enterprise portals and mobile client apps (Merchant, Admin, Fleet, User, and Delivery Agent) supporting high-volume cross-border parcel delivery across Singapore and APAC.
- Engineered high-performance TypeScript backend microservices communicating via gRPC, optimizing automated delivery dispatch and route allocation.
- Integrated international carrier APIs (including UPS) to expand global merchant delivery options, dynamic pricing algorithms, and real-time tracking reconciliation.
- Containerized distributed microservices and orchestrated zero-downtime deployments on Kubernetes (K8s), maintaining 99.9% availability during peak logistics demand surges.
- Led peer code reviews and standardized modular API contracts, cutting technical debt and accelerating release velocity across distributed engineering teams.
ReactNext.jsNode.jsNestJSTypeScriptKubernetesgRPCMicroservices -
Full-Stack Developer — WebDesignHamburg.net
View Specs ↓- Delivered custom full-stack web applications and client portals for European commercial clients, translating complex business requirements into responsive web solutions.
- Engineered modular frontend components and RESTful API integrations, optimizing asset bundling and reducing initial page load latency.
- Collaborated with distributed international stakeholders to deliver client milestones on schedule with zero defect regressions.
JavaScript (ES6+)PHPMySQLREST APIsCSS3Responsive Design -
Senior Web Application Developer — Incuvius
View Specs ↓- Architected and deployed custom web applications and scalable database schemas across 30+ client projects, resolving high-impact architectural and query bottlenecks.
- Spearheaded technical troubleshooting on high-traffic client portals, debugging critical production issues and optimizing MySQL indexing for peak traffic.
- Mentored junior web developers through code quality audits, architectural guidelines, and best practices in modern JavaScript, HTML5, and CSS3.
JavaScriptPHPMySQLHTML5CSS3Database Optimization -
Web Developer — Incuvius
View Specs ↓- Developed interactive user interfaces and custom web features using JavaScript, jQuery, and semantic CSS3 across diverse commercial websites.
- Profiled and resolved cross-browser rendering inconsistencies and frontend performance bottlenecks to elevate user experience.
- Partnered closely with UI designers and backend developers to deliver polished website features under tight project deadlines.
JavaScriptjQueryHTML5CSS3Cross-Browser Testing
Quality Control — Certified Seals
Certifications & Languages
Consignee Details — Final Destination