Hi, I'm Raisul.
Engineering High-Performance Mobile & Resilient Backend Systems
Bekasi, West Java, Indonesia·PT. Gerbang Data Indonesia·Telkom University
Fullstack Software Engineer specialized in architecting responsive cross-platform Flutter applications and scalable Golang / Node.js backend infrastructure. Proven track record eliminating operational bottlenecks across real-time IoT telemetry, multi-tenant healthcare platforms, and high-concurrency payment integrations.
Architecting for Reliability, Built for Real-World Scale
Bridging intuitive mobile experiences with battle-tested backend architecture — backed by the grit of high-altitude alpine leadership.
“Reliable systems are forged through resilient architecture, relentless edge-case testing, and decisive accountability under pressure.”
Fullstack Software Engineer at PT. Gerbang Data Indonesia specializing in high-performance cross-platform mobile systems (Flutter) and distributed backend architectures (Golang, Node.js/TypeScript, PostgreSQL). Telkom University Informatics graduate with production experience engineering high-throughput API services, real-time telemetry ingestion pipelines, and multi-tenant platforms.
From designing biometric check-in kiosks (FastAPI, pgvector) and resolving complex production authentication concurrency bottlenecks in hospital management systems (SIMRS VitaCore), to deploying live payment apps on Google Play (Xendit) and Golang LLM cost-optimization services, I build robust software that eliminates operational bottlenecks.
Beyond software architecture, I served as Expedition Leader for the ASTACALA Tel-U International Expedition to Mount Elbrus, Russia (5,642m) — successfully leading a summit team through sub-zero alpine crises (-20°C) with zero casualties. That experience forged a deep discipline for risk mitigation, calm problem-solving under pressure, and extreme operational accountability.
High-Performance Mobile Systems
Architecting cross-platform Flutter clients with offline-first synchronization, native device geofencing, hardware camera verification, and resilient Xendit payment state flows.
Scalable Backend & Telemetry Ingestion
Engineering high-concurrency Golang & Node.js services, time-series GPS location pipelines, modular-monolith hospital backends, and low-latency API architectures.
Business Impact & Incident Elimination
Diagnosing and resolving critical production concurrency failures, automating manual candidate vetting with cost-aware LLMs, and ensuring statutory PDP data privacy compliance.
High-Stakes Alpine Leadership
Expedition Leader of the ASTACALA Tel-U summit to Mount Elbrus, Russia (5,642m). Bringing sub-zero (-20°C) crisis composure, risk mitigation, and decisive ownership to software engineering.
My Journey
From leading international expeditions to building enterprise software — a timeline of growth and impact.
Fullstack Developer — Mobile & Backend
PT. Gerbang Data Indonesia
Architecting and shipping mission-critical enterprise platforms, distributed telemetry ingestion pipelines, and production mobile applications. Owning the end-to-end software lifecycle from database schema design and distributed API architecture to production deployment and incident response.
- Architected and shipped SIMRS VitaCore end-to-end: a modular-monolith backend (Node.js, Express, TypeScript, Prisma, PostgreSQL) with RBAC-gated APIs across outpatient, inpatient, pharmacy, and billing, paired with a React 19 real-time operations dashboard
- Designed biometric patient check-in kiosk: decoupled FastAPI microservice (InsightFace, ONNX) with pgvector similarity search, partial HNSW indexing, and Indonesian PDP-compliant consent architecture
- Diagnosed and resolved production authentication failure under concurrent hospital-network load, fixing rate limiter throttling on silent token refreshes and unblocking clinical consultations
- Built high-concurrency Go microservice integrating OpenAI API for candidate screening, combining deterministic scoring with selective LLM invocation to cut evaluation costs by over 70%
- Architected Golang backend ingesting high-frequency GPS telemetry from distributed vehicles with time-series location models and real-time client synchronization
- Built and shipped customer-facing Flutter mobile app to Google Play Store with resilient Xendit payment gateway state machine (pending/success/failure/timeout)
- Delivered web-based tugboat fleet management platform with Leaflet.js interactive vessel tracking, directional indicators, and dwell clustering for maritime operations
Expedition Leader — Mount Elbrus, Russia (5,642m)
ATEX 2024 — ASTACALA Tel-U International Expedition
Commanded an international high-altitude mountaineering expedition to the highest peak in Europe. Spearheaded strategic logistics, international diplomatic administration, risk mitigation, and real-time crisis decision-making in -20°C alpine environments.
- Successfully summited Mount Elbrus (5,642m) with 100% team safety and zero casualty incidents
- Managed cross-border expedition logistics, diplomatic permissions, and institutional partnerships
- Made rapid, critical operational decisions under volatile weather conditions and severe hypoxia
- Maintained peak team morale, communication protocols, and safety standards under extreme stress
- Produced comprehensive post-expedition technical documentation, financial audits, and publications
Bachelor of Informatics (S.Kom.)
Telkom University
Graduated in Informatics with a strong academic grounding in software engineering, distributed systems, mobile application architecture, and database engineering (GPA: 3.01 / 4.00).
- Specialized in modern software engineering, clean architecture, and distributed systems
- Engineered production-grade mobile and web systems as capstone and independent initiatives
- Active executive member of ASTACALA Tel-U mountaineering organization leading technical alpine operations
- Coursework focus: Data Structures, Database Systems, Network Architecture, and Software Design Patterns
Featured Work
Real-world projects that demonstrate my ability to build scalable, user-centric digital solutions.
Engineering Capabilities & Architecture Stack
A structured overview of core technologies, distributed system patterns, and engineering methodologies leveraged to build production-grade enterprise software.
Mobile Engineering
Cross-platform mobile applications, reactive state & hardware integrations
Backend & Distributed Systems
High-throughput API microservices, modular monoliths & auth architecture
AI & Telemetry Systems
Selective LLM pipelines, vector search & real-time IoT tracking
Web & Frontend Platforms
Modern, high-performance web applications and clinical command centers
Databases & Storage
Relational data modeling, vector embeddings & transactional consistency
DevOps & Engineering Reliability
Containerization, automated CI/CD pipelines & production incident root-cause
Let's Work Together
I'm always open to discussing new opportunities, enterprise systems development, and technical consulting.
Got a project in mind?
Whether you need a cross-platform mobile application, scalable web platform, or enterprise architecture solution — let's collaborate to build something remarkable.