👨‍💻 Daffa Jaya Perkasa

Full-Stack · Mobile · AI · DevOps Engineer

📍 Bandung, Indonesia (UTC+7 / WIB) • 👤 he/him • 💼 LinkedIn • 📧 dafayape@gmail.com

Building resilient, high-performance distributed systems, edge-native applications,
and machine learning pipelines with rigorous Clean Architecture and international ISO standards compliance.

I am a software engineer specializing in architecting end-to-end resilient platforms across four core engineering pillars: Full-Stack Web, Mobile Applications, Artificial Intelligence, and DevOps Infrastructure.

My engineering methodology prioritizes:

• Clean Architecture & Separation of Concerns: Enforcing explicit boundaries across UI, domain business logic, and infrastructure adapters.
• Resilience in Constrained Environments: Crafting low-bandwidth disruption-tolerant edge systems (LoRa, SQLite Store-and-Forward, binary serialization).
• Cryptographic Trust & Zero Fluff: 100% GPG-signed commits with verified identity non-repudiation, zero hardcoded credentials, and zero AI co-author pollution.
• Quality Gates Automation: Strict CI/CD pipelines enforcing regression testing, race condition detection, and static analysis.

Domain	Mastered Stack & Official Badges	Architecture & Engineering Standards
⚡ Backend & Distributed Systems		Gin, Gorilla WebSockets, GORM, Concurrency with Race Detectors, Redis Geospatial, RESTful API Design
🖥️ Frontend & Web Engineering		Next.js 16 (App Router), React 19, Turbopack, Leaflet Maps, Responsive Component Systems, Web Vitals
📱 Mobile & Edge Computing		Flutter 3.x, Riverpod 2.6, BLoC Pattern, Offline Store-and-Forward DTN, LoRa Physical Ether, GPS Geofencing
🧠 Artificial Intelligence & Vision		Google SigLIP ViT, Zero-Shot Classification, Asynchronous Inference Workers, ISO/IEC 42001 & 25059
📦 DevOps, Security & Cloud		Multi-Stage Builds, CI/CD Automated Quality Gates, POSIX Hardened Shell, Ed25519 GPG Non-Repudiation

Digital evaluation, anti-spoofing GPS geofence attendance, and cadet tracking platform for police academy institutions.

• Stack: Go (Gin, GORM, Redis), Next.js 16 (React 19), Flutter (Clean Architecture, BLoC Pattern).
• Key Engineering: 8-tier RBAC security model, append-only audit trail ledger, multi-aspect evaluation (academic, physical fitness, mental sociometry), anti-mock GPS geofencing via Redis geospatial caching.
• Compliance: ISO/IEC 25010 (Quality), ISO/IEC 27001 (Hardened Security), ISO/IEC 12207 (Lifecycle).

Software-in-the-Loop Maritime Telecommunications, Mesh Routing & Physical Ether Simulator.

• Stack: Go 1.22 (Virtual Ether Engine), Next.js 16 (Harbor Master Dashboard), Flutter (Ship Node Client).
• Key Engineering: Physical radio ether simulation, BFS shortest-path dynamic multi-hop routing, Disruption-Tolerant Networking (DTN) via offline transactional SQLite queue, pure binary MessagePack serialization.
• Compliance: ISO/IEC 25010, ISO/IEC 27001, ISO/IEC 12207.

Production-grade Vision AI for automated waste classification using Google SigLIP zero-shot model.

• Stack: Python 3.11, FastAPI, PyTorch, Google SigLIP ViT, Docker Multi-Stage.
• Key Engineering: Sub-second zero-shot visual inference, asynchronous worker pools, structured confidence scoring matrix, automated quality regression suite.
• Compliance: ISO/IEC 42001:2023 (AI Management System) & ISO/IEC 25059:2023 (Quality of AI Systems).

Web platform for palm oil supply chain traceability and sustainability monitoring.

• Stack: Next.js 16, React 19, TypeScript, Tailwind CSS, Lucide Icons.
• Key Engineering: Enterprise supply chain ledger dashboard, component-driven Clean Architecture, 100% static page pre-rendering via Turbopack.
• Compliance: ISO/IEC 25010 & ISO/IEC 27001.

Modular Unix environment configurations, developer tooling, and ISO 27001 cryptographic security hardening.

• Stack: Bash 5.x, POSIX Shell, Ed25519 GPG, Git Configuration.
• Key Engineering: Modular .bashrc.d architecture (15 components), idempotent automated installer, global security ignore policies, SSH keepalive hardening.
• Compliance: ISO/IEC 12207 & ISO/IEC 27001.

graph LR
    subgraph Governance["International Standards Compliance"]
        ISO25010["ISO/IEC 25010<br/>Software Product Quality"]
        ISO27001["ISO/IEC 27001<br/>Information Security"]
        ISO12207["ISO/IEC 12207<br/>Software Lifecycle"]
        ISO42001["ISO/IEC 42001<br/>AI Management"]
    end

    subgraph Guarantees["Technical Guarantees"]
        G1["Automated Test Suites (100% Pass)<br/>0 Data Race in Concurrency<br/>Sub-second Response Times"]
        G2["100% Ed25519 GPG Verified Commits<br/>Append-Only Audit Logging<br/>Zero Secret Contamination"]
        G3["Conventional Commits v1.0.0<br/>Clean Architecture Layers<br/>Automated CI Quality Gates"]
        G4["Zero-Shot Model Governance<br/>Deterministic Scoring Thresholds"]
    end

    ISO25010 --> G1
    ISO27001 --> G2
    ISO12207 --> G3
    ISO42001 --> G4

All source code contributions across public and private repositories are cryptographically signed to guarantee authenticity and non-repudiation:

• GPG Key ID: 7573912AF4141E99
• Algorithm: Ed25519
• Fingerprint: 63C9 25CD FF6A 5C49 46DA ACF0 7573 912A F414 1E99
• Commit History: 100% GitHub Verified Badge (verified: true)

• Email: dafayape@gmail.com
• LinkedIn: linkedin.com/in/dafayape
• GitHub: @dafayape
• Location: Bandung, West Java, Indonesia (UTC+7 / WIB)
• Pronouns: he / him
• Availability: Open for high-impact Full-Stack, Mobile, AI, and DevOps engineering opportunities.

_{Designed and engineered by Daffa Jaya Perkasa • Licensed under MIT}