[ wns ]Win Naing Soe
◆Portfolio · v2026.06

Senior Backend & FinTech Engineer

Win Naing Soe

Architecting mission-critical core banking, FinTech, Enterprise ERP & AI-assisted engineering.

Six years architecting secure, scalable backend systems for core banking, microfinance, stock-exchange operations, and Enterprise ERP. Built on Java, Spring Boot, PostgreSQL, and distributed microservices — accelerated with modern AI-agent orchestration (Claude Code, MCP, SpecKit, Agentic).

See selected work→Get in touchGitHubLinkedIn
6+
years shipping
5,000+
peak payment users
11
engineers mentored
2
President's Awards
~/wns — zsh
~ $whoami
Win Naing Soe
~ $cat role.txt
Senior Backend & FinTech Engineer
~ $ls skills/
java-21spring-boot-3microservicespostgresqloracle-19cGCPclaude-codemcpspeckit-sdd
~ $uptime
6+ years in production
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Designing deterministic backend systems where financial accuracy, concurrency, and auditability are non-negotiable.

Core BankingStock ExchangeEnterprise ERPAgentic AI
/ 00About

I build the reliable software that quietly moves money & trust.

Over the last 6+ years, I've engineered backend platforms across open-source core banking (Mifos Fineract), stock exchange operations, payment gateways, and enterprise ERP & WMS.

From architecting backends for 5,000+ peak concurrent payment users (2 President's Awards) to automating batch workflows that cut manual ops by 60%, I focus on high-stakes reliability: double-entry ledger consistency, financial risk models (SIMM), and edge-case resilience.

Today, I pair enterprise engineering (Java, Spring Boot, PostgreSQL, Oracle) with modern AI-agent orchestration (Claude Code, MCP, SpecKit) to accelerate delivery without sacrificing precision.

When I'm not coding I'm probably reading, exploring mountains, playing football, or quietly judging IEEE-754 because 0.1 + 0.2 !== 0.3.

◉
Based in
Bangkok, TH
☕
Fuel
Coffee & Curiosity
◆
Focus
Core Banking · FinTech · ERP · AI
⌘
Languages
Burmese · English · Japanese
Currently

Delivering enterprise ERP / Warehouse Management (WMS) solutions for a confidential enterprise client — building on 6+ years including core banking on Mifos Fineract at MSIS.

/ 01Financial & Enterprise Systems Architecture
Mission-Critical Financial Experience

Battle-tested core banking & enterprise architectures.

Six years designing and scaling production backends for financial institutions, stock exchanges, payment providers, and enterprise supply-chain ERPs where data consistency and zero-downtime are non-negotiable.

/ ARCHITECTURE 01Core Banking Engine

Mifos Fineract Core Banking Platform

Senior Full-Stack Software Engineer · MSIS Company·Feb 2025 — Jun 2026

Architect and deliver production banking microservices on the open-source Mifos Fineract financial engine. Implemented double-entry general ledger accounting, loan/deposit lifecycle management, and automated Spring Batch processing schedulers that reduced manual operational intervention by 60%.

Engineering Highlights & Impact:
  • ▸3 banking microservices in production
  • ▸15+ core banking endpoints (Loans, Deposits, GL)
  • ▸Strict ACID transactions & zero ledger drift
Java 21Spring Boot 3Mifos FineractSpring BatchPostgreSQLDockerAngular
/ ARCHITECTURE 02Capital Markets & Settlement

Stock Exchange Operations & Offshore Delivery

Software Engineer · DIR-ACE Technology (DAT)·Mar 2020 — Jan 2025

Led offshore engineering delivery for Tokyo/Japanese enterprise financial clients through full SDLC. Managed requirements definition, automated regression test suites with Selenium, and refactored mission-critical legacy Oracle PL/SQL databases for high-precision stock trade derivative calculations.

Engineering Highlights & Impact:
  • ▸11 engineers mentored & led across full SDLC
  • ▸🏆 President's Award for Productivity & QA (2024)
  • ▸Automated regression suite with Selenium & Shell
JavaSpring BootOracle 19c PL/SQLSeleniumJBossShell AutomationRequirements Definition
/ ARCHITECTURE 03High Scale & Payments

Payment Gateways & High-Concurrency Systems

Full Stack Developer · MAJA (JLPT Platform)·Nov 2020 — May 2023

Engineered high-concurrency backend architecture supporting 5,000+ peak concurrent payment users under national rush registration with zero downtime. Integrated the 2C2P payment gateway with automated reconciliation and re-engineered PostgreSQL stored procedures for SIMM (Standard Initial Margin Model) derivative risk calculations.

Engineering Highlights & Impact:
  • ▸5,000+ peak concurrent payment users with zero downtime
  • ▸2C2P payment gateway & automated reconciliation
  • ▸🏆 President's Award for Best System Development (2021)
Spring BootPostgreSQL2C2P GatewaySIMM Risk ModelCypressRocky Linux
/ ARCHITECTURE 04Supply Chain & Operations

Enterprise ERP & Warehouse Management System

Full-Stack / Backend Engineer · Confidential Client (NDA)·Jul 2026 — Present

Develop and maintain enterprise ERP modules covering Manufacturing (MFG), Bill of Materials (BOM), Inventory, Warehouse Management (WMS), Procurement, and Order Management. Spearheaded legacy modernization converting Java EE (JSP/Servlet) into a clean Spring Boot REST architecture with optimized Oracle PL/SQL stored procedures and triggers.

Engineering Highlights & Impact:
  • ▸6 enterprise modules (MFG, BOM, Inventory, WMS, Procurement, Orders)
  • ▸Modernized legacy Java EE (JSP/Servlet) to Spring Boot REST APIs
  • ▸Optimized Oracle PL/SQL stored procedures & data patch scripts
Spring BootReactOracle PL/SQLJava EEWMS & InventoryREST APIs
/ 02Enterprise AI Engineering
Enterprise Engineering Standards

Senior AI-Assisted Systems Engineering.

Moving beyond ad-hoc prompting — integrating autonomous subagents, Model Context Protocol (MCP), and Spec-Driven Development (SDD) into real production architectures while preserving banking-grade stability.

/ PILLAR 01System Integration

Production AI & Agentic Integration

Architect and implement autonomous subagents and custom Model Context Protocol (MCP) servers connected directly to enterprise databases (PostgreSQL/Oracle) and REST APIs, avoiding brittle chat prompts.

Claude Code CLIMCP ServersSubagentsREST APIs
/ PILLAR 02Verification & QA

AI Output Verification & Code Review

Apply 6+ years of FinTech rigor to audit and verify AI-generated code. Eliminate hallucinations, race conditions, and vulnerabilities via automated TDD test suites (JUnit, Cypress, Playwright).

TDDCode ReviewRegression TestingOWASP
/ PILLAR 03Requirements & SDD

Requirements Definition & Spec-Driven Development

Translate complex business domain workflows into unambiguous specifications using SpecKit (/speckit.specify, /speckit.plan, /speckit.tasks) and formal PRDs before writing or generating code.

SpecKitSDDRequirements SpecBusiness Flow
/ PILLAR 04Context & Memory

Data & Context Engineering

Prevent context rot and hallucination by structuring project knowledge graphs (claude-mem), active state trackers (Context7), and relational schema indexing across PostgreSQL and Supabase.

claude-memContext7PostgreSQLSupabase
/ PILLAR 05Security & Governance

Security, Access Control & AI Governance

Enforce least-privilege tool boundaries (read-only MCP permissions, isolated environments), safeguard proprietary banking data against model leakage, and implement audit logging.

Least PrivilegeRead-Only MCPSpring SecurityAudit
/ PILLAR 06LLMOps & Cost

Cost Management & LLMOps

Manage token economics with LiteLLM proxies, intelligent model routing (cost-efficient models for tasks vs. reasoning models for architecture), and resilient fallback strategies.

LiteLLM ProxyToken BudgetingModel RoutingMonitoring
/ PILLAR 07Tooling & Velocity

AI Tooling Mastery & Engineering Velocity

Leverage Claude Code, Cursor, and the Superpowers framework for autonomous GSD (Get Stuff Done) execution, backed by 7 completed Anthropic Skilljar courses.

Claude Code CLICursorSuperpowers7 Courses Completed
/ 03Technical Arsenal

Tools I reach for sharpened by use.

AI & Agentic Engineering

/ 01
  • ▸Anthropic Claude Code (CLI)
  • ▸Model Context Protocol (MCP)
  • ▸Multi-Agent & Subagents
  • ▸SpecKit (SDD) & Superpowers
  • ▸LiteLLM Proxy & Token Budgeting
  • ▸AI Code Review & Verification
Agentic WorkflowsPrompt PlaybooksContext Discipline

Domain & Financial Systems

/ 02
  • ▸Core Banking & Microfinance
  • ▸Mifos Fineract Platform
  • ▸Stock Exchange Operations
  • ▸Payment Gateway (2C2P)
  • ▸SIMM Risk Calculations
  • ▸Requirements Definition (BRD / SRS)
FinTechOffshore SDLCCompliance

Backend & Architecture

/ 03
  • ▸Java (8/11/17/21) · Spring Boot
  • ▸Spring Security & Spring Batch
  • ▸RESTful APIs & Microservices
  • ▸Spec-Driven Development (SDD)
  • ▸Test-Driven Development (TDD)
  • ▸NestJS & Node.js
System DesignSOLIDClean Code

Cloud, GCP & DevOps

/ 04
  • ▸Google Cloud Platform (GCP)
  • ▸Cloud Run & Cloud Storage
  • ▸AWS (Lightsail, EC2)
  • ▸Docker & Docker Compose
  • ▸CI/CD (GitHub Actions, GitLab)
  • ▸Linux / Bash Automation
GCPContainersDevOps

Database & Storage

/ 05
  • ▸PostgreSQL & PostgreSQL MCP
  • ▸Oracle PL/SQL & Stored Procs
  • ▸Supabase & Prisma ORM
  • ▸Redis & BullMQ Queues
  • ▸Query Optimization & Indexing
  • ▸Database Migrations (Flyway)
Data ModelingHigh ConcurrencyIntegrity

Frontend & Web Engineering

/ 06
  • ▸Angular (TS / JS)
  • ▸React 19 & Next.js 15
  • ▸TypeScript & Tailwind CSS
  • ▸shadcn/ui & Radix UI
  • ▸Automated Testing (Playwright, Cypress)
  • ▸Responsive & Accessible UI
Next.jsAngularModern UI

Testing & Quality Assurance

/ 07
  • ▸JUnit & Test-Driven Development (TDD)
  • ▸Cypress (E2E Testing)
  • ▸Playwright (E2E & Verification)
  • ▸Selenium (Regression Automation)
  • ▸Automated Regression Suites
  • ▸Security & Code Review (OWASP)
TDDE2E TestingRegression Automation
Core Expertise

Backend engineering, financial systems, distributed pipelines, and AI-accelerated delivery.

Designing secure microservice architectures · building core banking, loan & payment platforms · orchestrating autonomous agent workflows · leading engineering teams and code reviews.

/ 04Career History & Systems Experience

Six years, one through-line: make finance software trustworthy.

Jul 2026 — Present

Full-Stack / Backend Engineer

Confidential Client · NDA
Domain · Impact
Enterprise ERP & Warehouse Management System

Developing enterprise ERP modules (MFG, BOM, Inventory, WMS, Procurement, Order Management) and modernizing legacy Java EE into a Spring Boot REST architecture.

Spring BootReactOracle PL/SQLJava EE
Modernized legacy Java EE (JSP/Servlet) into Spring Boot REST APIs.
Feb 2025 — Jun 2026

Senior Full-Stack Software Engineer

MSIS Company
Domain · Impact
Mifos Fineract — Core Banking Platform

Architected and shipped scalable banking microservices on an open-source financial platform serving enterprise operations.

JavaSpring BootAngularDockerGradleAWS
Launched 3 new microservices banking projects to production.
Apr 2023 — Jan 2025

Senior Software Engineer

DIR-ACE Technology
Domain · Impact
Stock Exchange Operations · Offshore (Japan)

Led full SDLC for Japanese enterprise clients. Mentored a team of 11 — including 4 junior engineers — through code reviews and standards.

JavaSpring BootSQLAngularLinuxExcel VBA
🏆 President's Award · Productivity & Quality Assurance (2024).
Apr 2022 — Mar 2023

Software Engineer

DIR-ACE Technology
Domain · Impact
Financial Margin Reporting (SIMM)

Optimized complex financial calculations and shipped interactive KPI dashboards. Refactored legacy Oracle SQL for maintainability.

JavaSpring BootAngularPostgreSQLJBoss
Enhanced system stability and core application performance.
Nov 2020 — Mar 2022

Full Stack Developer

DIR-ACE Technology · MAJA
Domain · Impact
JLPT National Registration System

Engineered high-traffic backend supporting 5,000+ concurrent payment users with zero downtime. Integrated 2C2P payment gateway.

Java 11Spring BootPostgreSQLjQueryCypress
🏆 President's Award · Best System Development (2021).
Mar 2020 — Oct 2020

Junior Programmer

DIR-ACE Technology
Domain · Impact
Stock Price Derivative Calculation

Streamlined daily trade processing with automated testing (Selenium), shell automation, and legacy refactoring.

Java 8Java SwingSpring BootSQLShell
Improved legacy database performance & maintainability.
/ 05Selected Work

Projects spanning AI Agents, FinTech, and enterprise modernization.

01
FinTechCore BankingOpen Source

Mifos Fineract — Core Banking

Senior Full-Stack Engineer

Built and enhanced scalable banking microservices on an open-source financial platform.

Java/Spring Boot/Docker/Angular/PostgreSQL/
Read case study →
02
Distributed SystemsFull StackData Pipeline

Multi-Platform Scraping & Analytics Platform

Full-Stack / Systems Engineer

Production data pipeline scraping TikTok Shop & EchoTik behind anti-bot defenses, landing audit-grade analytics across 3 independently deployable services.

React 19/NestJS 11/BullMQ/Spring Boot 3/Oracle 19c/Redis/
Read case study →
03
EnterpriseFinTechOffshore

Stock Exchange Operations Platform

Senior Software Engineer

Enterprise platform managing stock exchange operations, resource allocation, and delivery tracking for Japanese clients.

Java/Spring Boot/SQL/Linux/Angular/
Read case study →
04
High ScaleEnterprisePayments

JLPT National Registration System

Full Stack Developer

National-scale examination registration supporting online applications, payments, and scheduling with 5,000+ peak concurrent payment users.

Java 11/Spring Boot/PostgreSQL/jQuery/2C2P/
Read case study →
05
AI AgentsMCPArchitecture

Evolvia — Personal AI OS

AI Systems Architect

Personal Life OS with autonomous multi-agent orchestration, Claude Code CLI, and custom Model Context Protocol (MCP) integrations.

Claude Code/MCP/Subagents/Superpowers/TypeScript/Docker/
Read case study →
06
E-CommerceSDDNext.js 15

CrossMart — Cross-Border Marketplace

Full-Stack Engineer & Team Co-Lead

Cross-border marketplace platform built with Spec-Driven Development (SDD) & SpecKit, Next.js 15, NestJS, and Supabase.

Next.js 15/NestJS/Supabase/Prisma/BullMQ/SpecKit/
Read case study →
07
MCPSpring BootFull Stack

ShareShelf — Community Resource Library

Full-Stack Developer

Community tool library utilizing a PostgreSQL MCP server and specialized Claude Subagents for safe schema maintenance and query analysis.

Java 21/Spring Boot/PostgreSQL/PostgreSQL MCP/Subagents/
Read case study →
/ Other notable builds
KPI Management System
Backend Developer
Performance tracking for monitoring KPIs across departments with interactive dashboards.
Java · Spring Boot · MySQL · React
Offshore Development System
Backend Developer
Platform managing offshore software projects, resources, and delivery tracking.
Java · Spring Boot · Angular
Smart Attendance System
Developer
Automated attendance with facial recognition and real-time reporting.
Python · OpenCV · TensorFlow · Flask
/ 06Recognition & Education

Awards, certifications, and the long road of learning.

Anthropic Academy / Skilljar (7 Courses Completed)

2026
Anthropic Academy / Skilljar

Completed courses: Claude Code 101, Claude Code in Action, Model Context Protocol (MCP) Intro, Subagents Intro, Agent Skills Intro, Claude Platform 101, and Claude 101.

ITPEC — Fundamental Information Technology Engineer (FE)

06 / 2023
IT Professionals Examination Council, Japan

National-level IT engineer credential under mutual recognition agreement with Japan Information-technology Promotion Agency (IPA). ID MMFE23S00159.

President's Award for Productivity & Quality Assurance

2024
DIR-ACE Technology (Daiwa Institute of Research Group)

Recognized for leading offshore delivery with zero critical defects and exemplary engineering standards.

President's Award for Best System Development

09 / 2021
DIR-ACE Technology

For outstanding contribution to the JLPT National Registration System project handling 5,000+ peak concurrent payment users.

Quality Assurance Award

09 / 2021
DIR-ACE Technology

Recognized for productivity, test automation, and code quality during an internal financial systems engagement.

Java Web Development — Talent Program

11 / 2019
ACE Group of Companies

Selective intensive training in enterprise Java, Spring MVC, and architecture.

/ 07Let's build something

Let's build
something great
together.

I'm open to senior backend / FinTech, distributed microservices, and AI-assisted engineering roles — remote, hybrid, or with relocation from Bangkok.

If you're working on core banking, payments, microfinance, autonomous agent systems, or an enterprise platform that has to be correct, fast, and quiet — I'd love to talk.

Senior Backend EngineerFinTech & Core BankingDistributed MicroservicesAI-Assisted DeliveryGCP & Cloud Architecture
✉
Email
winnaingsoe6666@gmail.com
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