High-Concurrency Architect · Full-Stack Systems

Engineering resilient systems, financial rails, and precision interfaces.

I architect production web applications, decision support engines, and low-latency algorithmic trading infrastructure. Focused on zero-downtime scalability, algorithmic rigor, and midnight precision design.

View Production Systems ↓ Launch Interactive Console >_
99.98%
High-Availability Target
< 25ms
P99 Edge Query Latency
0%
Paper Waste / Digital Gov
CRC16
ASPI & EMVCo Compliant
Proof of Execution

Selected Production Systems

Architectural breakdowns of deployed enterprise backends, government decision platforms, and high-throughput transactional engines.

🚆
DJKA Talent Pool & Decision Support System
Micro-frontend architecture running on port 3006 with standalone Dukungan Manajemen redirection.
Government Infrastructure 2026

DJKA Talent Pool & SPK Engine

Human resource competency assessment and meritocratic promotion system for Directorate General of Railways. Built on multi-criteria GAP Analysis algorithms.

▸ Profile Matching Algorithm: Evaluates core and secondary factors against ideal railway engineer competency benchmarks.
▸ Enterprise Governance: BSrE electronic signature verification, tamper-evident scoring audit logs, zero placeholder data.
PostgreSQL 16 Profile Matching Micro-Frontends BSrE TTE Node.js
SiRupat Meeting & Room Scheduling System
Enterprise GovTech 2026

SiRupat (Sistem Rapat & Risalah DJKA)

End-to-end executive meeting management, room reservation scheduling, and automated legal minutes distribution system with role-based access control.

▸ Real-Time Schedule Matrix: Eliminates double-booking conflicts across ministry ballrooms and executive briefing rooms.
▸ Legally Binding Minutes: Instant PDF rendering with BSrE barcode validation and direct attendance ledger sync.
Next.js Express API PostgreSQL Tailwind CSS RBAC
⚡
UNIFRAS Multi-Rail PPOB & Aggregator
Dynamic QRIS generation (CRC16/0x1021) and idempotent payment reconciliation.
FinTech Rails 2026 / 2027

UNIFRAS Transaction & Payment Core

High-throughput digital payment processing infrastructure supporting multi-payment gateways, automated unique-code bank mutations, and biller integrations.

▸ Dynamic QRIS Generator: Native ASPI / EMVCo standard string formatting with polynomial CRC16 check for sub-second checkout.
▸ Idempotency Layer: Prevents double-spend and duplicate callback execution under high concurrency webhook storms.
Node.js PostgreSQL 16 Redis Lock Docker QRIS Core
📈
XAU/USD Quantitative Price-Action Engine
Sub-millisecond order routing with mathematical drawdown containment guardrails.
Algorithmic Systems 2026

XAU/USD Market Execution Bot

Algorithmic trading engine designed for multi-session gold price-action. Implements strict R-multiple risk profiling, spread filters, and news-event locks.

▸ Strict Risk Guardrails: Mathematical max drawdown containment and dynamic lot sizing computed per ATR volatility bar.
▸ Asynchronous Execution: Low-latency socket bridge to broker execution endpoints with automated slippage rejection.
Python 3.12 FastAPI Pandas / NumPy MetaTrader Bridge WebSocket
Engineering Discipline

Architectural Principles

Building systems that thrive under load requires rigorous constraints rather than premature abstractions.

01 //

Idempotency & State Reconciliation

Networks fail and webhooks retry. All mission-critical APIs are designed with atomic database transactions and strict idempotency keys to guarantee zero side-effect duplication.

02 //

Pipelined Concurrency Over Raw Speed

Throughput is bounded by the bottleneck stage. We dissect monolithic blocking tasks into parallelized, decoupled stages with bounded queues to maintain steady-state throughput.

03 //

Zero-Trust & Real Evidence First

No assumptions, no synthetic hallucinations. Code is verified against real execution profiles, rigorous integration testing, and audited cryptographic signatures.

Capabilities

Technical Matrix

Languages, frameworks, and low-level infrastructure utilized in shipping production-grade software.

● Core Languages
TypeScript / JavaScript Advanced
Python (Async / Data) Advanced
SQL (PostgreSQL dialect) Advanced
POSIX Shell / Bash Proficient
● Web & Frameworks
Next.js & React Production
Node.js / Express Production
FastAPI & REST APIs Production
Tailwind CSS & WebGL Pixel-Perfect
● Data & Infrastructure
PostgreSQL 16 & Migrations Production
Redis (Cache / Distributed Locks) Production
Docker & Containers Production
Cloudflare Edge (Workers/Pages) Production
● Protocols & Security
ASPI QRIS / EMVCo Specs Compliant
BSrE Electronic Signatures Standard
TLS / OAuth / JWT RBAC Hardened
WebSocket & Event Streams Real-Time
Interactive Terminal

Developer Command Center

Test interactive queries directly against this environment. Type help for available commands.

raxwell@edge-proxy: ~/portfolio
ACTIVE SESSION
Heinrich Raxwell CLI v1.0.4 (x86_64-pc-edge)
Type 'help' to list commands, or 'projects' to inspect architecture specs.
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