Reiko

JAZEREEL LYDIA GOH REIKO

// SDET, Manual & Automation, Mechatronics Engineer

STATUS OK ●

ABOUT ME

A Mechatronics & Robotics Engineer specializing in the 'Safety-Critical Integrity' of autonomous systems. I bridge the gap between physical machines and digital logic to ensure autonomous environments operate with absolute truth.

  • ▷ Forensic System Auditor: Unmasking systemic bottlenecks through binary analysis and hardware-level debugging to identify the 'ground truth' of failing logic.
  • ▷ Automation Architect: Replacing manual friction with custom multi-threaded Python TUIs and image-based logic (OCR) to scale engineering productivity.
  • ▷ Infrastructure Orchestrator: Managing high-availability virtualized environments using Proxmox and Docker to ensure 99.9% uptime for critical services.
  • ▷ Stealth Network Security: Hardening digital perimeters through custom Cloudflare Workers, stealth DNS logic, and automated traffic 'tarpitting' to neutralize probes.
  • ≫ Systems Gatekeeper: Operating with high-integrity 'Black Box' logic — recording the truth of a system, however messy, to ensure stability where failure is not an option.
2023 — Present DBS BANK // TEST ANALYST (MANUAL / AUTOMATION)
  • ≫ Cryptographic Engineering: Engineered a custom TWQR Payment Barcode/QR Generator & Validator using Python and DES3 Cryptography to unblock UAT development and testing cycles by simulating secure transaction payloads.
  • ▷ Baseline Architecture: Reverse-engineered regional and global specifications to establish the first internal testing baseline for DBS's Taiwan market integration, directly supporting DBS's award for Best Online Payments Solution in Taiwan (Global Finance, 2026).
  • ▷ Environment Optimization: Overhauled Taiwan's legacy Java and Selenium setups by refactoring hardcoded parameters into a sanitized, centralized .env configuration system, eliminating credential leak risks and streamlining developer workflows.
  • ▷ Deep System Forensics: Conducted low-level runtime debugging across Java, REST APIs, and web viewports, correcting layout bounds (innerWidth/CSS box-sizing) and identifying dormant ThreadLocal reporting hooks to map out framework readiness for parallel execution.
  • ▷ API & Utility Automation: Migrated legacy VBA tools into a high-performance, dual-mode (CLI/TUI) Python engineering utility with native PowerShell REST API validation loops to programmatically audit encrypted JSON payloads against live backend schemas.
  • ▷ Systems Integration: Developed multi-threaded TUI and GUI applications (py_cui, Rich, Kivy) to automate data injection, sanitize complex QR payloads, handle CJK Unicode edge cases, and auto-generate velocity metrics via Jira APIs.
  • ▷ Early-Phase Quality: Implemented 'Shift-Left' quality checks during initial coding phases, identifying 'showstopper' logic errors months ahead of scheduled project milestones before they reached system-wide integration.
  • ▷ Stakeholder Triage: Streamlined regional defect management and stakeholder reporting across SG, TW, CN and HK by authoring detailed root-cause analyses and technical execution summaries to accelerate issue resolution.
  • ▷ Cross-Platform Stability: Authored and executed BDD-driven test suites (jBehave, Digital.ai) across SG, TW, CN and HK, ensuring uniform stability for retail banking apps on iOS, Android, and browser configurations.
2022 SIEMENS SG // METRICS VALIDATOR / SOFTWARE TEST ENGINEER
  • ≫ NLP Implementation: Deployed Natural Language Processing (NLTK/Python) to parse and resolve ambiguous user inputs, transforming 'messy' field data into structured requirements.
  • ▷ BI Logic Audit: Verified Business Intelligence logic and metric definitions to ensure that high-level analytics reflected the actual mechanical truth of railway systems.
  • ▷ Big Data Extraction: Leveraged Python and HIVE SQL to manipulate and sanitize large-scale, heterogeneous datasets for LTA and ST Engineering projects.
  • ▷ Compliance Verification: Designed SIT/UAT suites to strictly align software outputs with System Requirements (SRS), maintaining safety-critical railway standards.
2021 — 2022 KEYSIGHT SG // AUTOMATED SOFTWARE TESTING CONSULTANT
  • ≫ HMI Debugging: Audited Human-Machine Interface (HMI) software using C#, identifying and debugging critical logic failures at the hardware-software interaction layer.
  • ▷ Framework Migration: Architected the conversion of legacy manual test suites into automated libraries using SenseTalk (Eggplant Functional) and Selenium WebDriver.
  • ▷ Edge-Case Auditing: Implemented aggressive negative testing to identify system behavior under out-of-scope inputs, securing the platform against unknown failure states.
  • ▷ Heuristic Validation: Designed UAT protocols to verify that automated results maintained 100% parity with legacy human-driven baselines.
2020 — 2021 OCBC BANK // TEST ANALYST (MANUAL)
  • ≫ Equities Launch: Validated and unblocked the launch of the Equities trading platform, ensuring high-integrity execution for complex financial transactions.
  • ▷ Process Automation: Engineered internal macros and Python scripts to automate redundant account setup workflows, accelerating the SIT/UAT testing lifecycle.
  • ▷ Payment Standards: Tested and implemented EMVCo SGQR mobile functions, ensuring regional payment standards were met across the mobile ecosystem.
  • ▷ Stress & Integrity: Executed rigorous stress testing on retail banking apps to identify systemic breaking points and edge-case vulnerabilities.
2020 COVID-19 NATIONAL SUPPORT // HEALTHCARE ASSISTANT / HPB SWABBER
  • ≫ National Recognition: Awarded the COVID-19 Resilience Medal for sustained commitment to national safety: No. 30448
  • ▷ Database Integrity: Managed the national COVID-19 database, ensuring high-fidelity tracking of patient records and test results.
  • ▷ Protocol Execution: Enforced rigorous bio-safety procedures in collaboration with nursing staff across multiple high-risk locations.
2019 VENTURE PTE LTD // SYSTEMS TESTER (FIRMWARE & HMI)
  • ≫ Kernel Diagnostics: Managed an air-gapped Linux testing environment; developed a custom library of Bash scripts to automate kernel-level diagnostic routines.
  • ▷ Interface Integrity: Validated specialized micro-electronics for HMI systems, ensuring signal integrity between custom hardware and control interfaces.
  • ▷ Validation Logic: Engineered novel hardware validation protocols to stress-test prototype logic, reducing manual verification cycles.
2018 — 2019 RAZER SG // TEST TEAM LEAD (HARDWARE & SOFTWARE)
  • ≫ Operational Oversight: Directed a high-throughput testing operation, coordinating a peak force of 30 testers to ensure delivery across parallel product lines.
  • ▷ UAT Architecture: Architected comprehensive User Acceptance Testing (UAT) frameworks for prototype hardware, establishing the quality baseline for global releases.
  • ▷ Efficiency Injection: Developed custom Excel Macros and AutoHotkey automation logic to eliminate repetitive manual telemetry logging.
  • ▷ Technical Liaison: Served as the primary technical bridge to design engineers, translating complex testing telemetry into actionable hardware refinements.
2018 HP SINGAPORE // SOFTWARE TESTER (PROTOTYPE SYSTEMS)
  • ≫ Environmental Stress Testing: Performed aggressive hardware-software validation on prototype systems using oscilloscopes and thermal stress environments (industrial freezers/ovens) to identify failure thresholds.
  • ▷ Defect Reconstruction: Captured and documented non-linear system bugs, recreating complex failure states to unblock firmware engineering cycles.
  • ▷ Workflow Augmentation: Engineered custom Excel Macros and AutoHotkey scripts to inject automation into manual testing workflows, increasing throughput for prototype validation.
2016 — 2018 MANUFACTURING INTEGRATION TECHNOLOGY LTD // TECHNICAL SPECIALIST (SEMICONDUCTOR)
  • ≫ Kinematic Calibration: Managed the assembly and high-precision calibration of silicon wafer 'pick and place' robotics, ensuring micron-level accuracy in high-speed manufacturing.
  • ▷ Vision System Validation: Configured and tested 3D machine vision cameras for chip scanning, bridging the gap between physical optical capture and digital defect detection.
  • ▷ Cleanroom Deployment: Executed onsite systems integration and troubleshooting at AMS Micron, maintaining rigorous cleanroom protocols while resolving hardware-logic collisions.
LANG LANGUAGES
  • ≫ Python:
    Architecting multi-threaded TUIs, custom GUI applications, and NLP-driven data sanitization pipelines using Kivy // Rich // Flask // NLTK.
  • ▷ Java:
    Developing robust automated test suites and framework utilities within enterprise-scale QA lifecycles.
  • ▷ SQL & Big Data:
    Managing real-time transaction states in MySQL // MariaDB and distributed data warehousing via Apache Hive.
  • EN English:
    Technical documentation, SRS/SDS authoring and cross-border stakeholder communication.
  • CN Chinese:
    Professional conversational proficiency for regional coordination and technical collaboration.
OS OS & RUNTIMES
  • ≫ Windows:
    Hardening and orchestrating enterprise-grade environments across Workstation and Server architectures for high-compliance banking systems.
  • ▷ macOS // Unix-like:
    Advanced system navigation and toolchain integration for secure local development and administrative workflows.
  • ▷ Linux:
    Architecting lean, purpose-built nodes using Debian // Raspbian // Alpine for stable edge-computing and server-side automation.
AUTO AUTOMATION
  • ≫ VBA (Visual Basic for Applications):
    Eliminating manual friction within high-compliance banking ecosystems by architecting secure Excel/Access macro-automation and report generation.
  • ▷ Eggplant SenseTalk:
    Implementing image-based automation logic to validate complex industrial HMI software, bridging the gap between high-level UI states and underlying system behavior.
  • ▷ AutoHotkey:
    Developing low-level UI wrappers and macro-driven shortcuts to streamline complex industrial HMI interactions and testing workflows.
LOG SYSTEMS SCRIPTING
  • ≫ PowerShell // Batch:
    Native Windows environment hardening and legacy automation.
  • ▷ Bash (Bourne Again):
    Advanced automation engineering utilized for heavy-duty testing utilities and automated workflow routing.
  • ▷ POSIX Shell (sh):
    Scripts engineered for high-portability in minimal runtime containers.
WEB WEB TECH & UI
  • ≫ Frontend (UX/UI):
    Crafting responsive, high-fidelity interfaces and documentation sites using HTML5 // CSS3 // Sass // Markdown.
  • ▷ JavaScript & PHP:
    Implementing client-side interactivity and server-side logic for dynamic data visualization and tool dashboards.
  • ▷ Tooling & Ecosystem:
    Managing dependency lifecycles and build pipelines using NPM and specialized version control workflows.
DEVOPS DEV & VERSION CONTROL
  • ≫ Atlassian Suite:
    Orchestrating Agile workflows and requirement traceability within JIRA and Zephyr environments.
  • ▷ Git Ecosystem:
    Managing complex code branching and collaboration via GitHub, GitLab, and SourceTree.
  • ▷ IDE Ecosystem:
    Utilizing IntelliJ IDEA for enterprise-scale Java and Python software development, and VS Code for rapid script prototyping.
SENSE TELEMETRY & LOGIC
  • ≫ Postman // NPM:
    Executing automated API contract testing and payload validation for secure gateways.
  • ▷ Grafana // Prometheus:
    Architecting real-time monitoring dashboards for system health and metric visualization.
  • ▷ Jupyter:
    Utilizing Lab and Notebooks for data sanitization, NLP prototyping, and ETL validation.
XRAY LOGIC AUDIT
  • ≫ Binary & Memory Auditing:
    Executing low-level forensic inspection and runtime memory manipulation via HxD // Cheat Engine to identify leaks and vulnerabilities.
  • ▷ Static Analysis (IDA Pro):
    Reverse-engineering proprietary binaries to audit 'Black Box' logic and systemic security gaps.
INFRA HOMELAB ARCHITECTURE
  • ≫ Proxmox VE (LXC):
    Architecting a self-hosted hypervisor environment utilizing lightweight LXC containers and virtual machines to host core services like Nextcloud and Jellyfin without Docker overhead.
  • ▷ Network Segregation:
    Configuring a secure UniFi-based network stack featuring physical hardware migrations, granular VLAN segregation, and Cloudflare Tunnels for secure DNS routing.
IOT HOME AUTOMATION & TELEMETRY
  • ≫ Home Assistant:
    Deploying a centralized Home Assistant ecosystem featuring advanced Zigbee2MQTT device networks and custom YAML configurations for tailored asset control.
  • ▷ HMI Kiosk Deployment:
    Architecting and building a dedicated hardware touch-interface utilizing a Raspberry Pi 5 to display real-time system telemetry and custom Mushroom card dashboards.
Python / ADB DEVICE INTERACTIONS
  • ≫ scrcpy Standalone:
    Leveraging standalone scrcpy binaries and direct low-level Android Debug Bridge (ADB) primitives to orchestrate low-latency mobile device mirror manipulation and UI interactions.
  • ▷ Mobile Hardware:
    Developing and deploying terminal utilities tailored to specific high-end form-factors like the Pixel 9 Pro Fold for custom display configurations.
PAYLOAD CORE UTILITY DEVELOPMENT
  • ≫ TWQR / SGQR Parsing:
    Reverse-engineered EMVCo specifications to architect a full-stack validation suite. Engineered an automation-driven Excel/VBA macro workbook for rapid tabular generation, scaled it into a standalone terminal-based Python engine for native cryptographic payload parsing, and deployed a web interface example hosted via Cloudflare Pages as a live portfolio showcase.
  • ▷ TesserFlux Engine:
    Developing a custom multi-stop public transit navigation application utilizing real-time Singapore LTA DataMall REST API streams to compute optimal routes.
SECURITY VULNERABILITY & LOGIC AUDITING
  • ≫ Binary & Memory Auditing:
    Executing low-level forensic inspection, runtime memory manipulation, and application logic exploitation via HxD hex-editors and Cheat Engine hooks.
  • ▷ Static Analysis:
    Reverse-engineering proprietary binaries using tools like IDA Pro to audit undocumented 'Black Box' execution paths and structural logic flaws.
LOGIC INDUSTRIAL & HARDWARE LOGIC
  • ≫ Protocol Logic:
    Implementing industrial communication and hardware data exchange via Modbus, Siemens LOGO!Soft, and MPLAB embedded firmware environments.
  • ▷ Mechanical CAD Design:
    Drafting high-precision 3D solids and electrical schematics using Autodesk AutoCAD and Inventor for custom hardware fabrication.
DSP ACOUSTIC ARCHITECTURE
  • ≫ Signal Orchestration:
    Orchestrating multi-track live audio signal arrays, spectral noise floor restoration, and dynamic frequency processing via Ableton Live, FL Studio, and Adobe Audition.
BIOMECH KINETIC TELEMETRY
  • ≫ Spatial Logging:
    Logging and parsing real-time spatial metrics against biological strain curves during high-velocity endurance cycling and long-distance expeditions to model physical thresholds.

Contact Nodes

CONTACT FORM

GET CV

▷ GET CV [ CORE ] ◁ ▷ GET CV [ FULL ] ◁