Architect
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Open to Senior & Architect roles

Building enterprisesoftwarethat scales.

Weyinmi MadamedonLead Software Engineer

Designing enterprise software, intelligent systems, and scalable cloud platforms that solve complex business problems.

6+ yrs enterprise/.NET · AI · Cloud/FinTech · Healthcare/Lagos, NG
Portrait of Weyinmi Madamedon
6+
Years building enterprise systems
50+
Algorithmic trading systems shipped
40%
Performance gains delivered on legacy platforms
Enterprise
Scale systems, concept to production
Featured Work · 01

Featured Projects

01
HEALTHCARE

Patient Record Management System

A clinical platform connecting patients with healthcare professionals for coordinated, informed treatment — secure records, role-based access, and clean clinical workflows.

ASP.NET CoreReactPostgreSQLTailwind
02
REAL-TIME

Stocks Feed API

Live market-price streaming with sub-second updates and zero client polling — SignalR hubs over persistent WebSocket connections broadcasting to many concurrent clients.

C#SignalRWebSockets
03
PAYMENTS

Payment Service Integration Library

A reusable, regulation-compliant integration library powering local-bank payments at high throughput — modular adapters and idempotent processing impacting 1M+ users.

C#SQL ServerAzure
04
AI
how do I scale this?
Partition by region, cache hot reads…

AI Chat Bot

A conversational assistant that processes user input and returns relevant, contextual responses through the OpenAI API — a natural-language interface over business workflows.

ReactOpenAI APIREST API
05 · QUANT / FINTECH · FEATURED

Algorithmic Trading Systems

50+ algorithmic trading systems for automated market analysis and execution. High-performance trade algorithms and quantitative models, validated against large volumes of live market data to drive trading performance and operational efficiency.

C#Quant Modeling.NETMQL4MQL5PinescriptcTraderHigh-Performance
EXECUTION ENGINE · BACKTESTED · LIVE
System Design · 02

Enterprise Architecture

How the systems actually fit together — data flow, boundaries, and the patterns that keep them fast and reliable at scale.

FIG.01 — REAL-TIME MARKET DATA

Real-time stock market updates

Market Feedticks
Ingestionnormalize
SignalR Hubfan-out
Clientslive UI
WebSocket · push-based · no polling · sub-second latency
FIG.02 — PAYMENT RAILS

Payment processing systems

ClientAPI GatewayPayment Service
Bank AdaptersLedger DB
idempotent · webhooks · high-throughput · regulation-compliant
FIG.03 — RETRIEVAL-AUGMENTED

AI-powered conversational systems

UserChat APIOrchestrator · Microsoft Agentic Framework / SK
RetrieverVector Store+LLM · OpenAI
RAG · grounded context · Semantic Kernel orchestration
FIG.04 — EVENT-DRIVEN

Distributed enterprise applications

Web · BlazorAPIMessage Bus
Service ×NSQL · Postgres
CQRS · event-driven · containerized · Kubernetes
Trajectory · 03

Professional Experience

(Full-Stack) Software Engineer · Melios Ltd

Nov 2024 — Present · Ikoyi, Lagos

Lead architecture, development, and deployment of enterprise-grade platforms serving business-critical operations. Refactored a legacy Risk Evaluation & Reporting Platform, cutting response times by ~40%, modernized ASP.NET MVC, Web API, React and Blazor frontends, and own release pipelines on Azure DevOps while mentoring engineers and setting standards.

Backend Engineer · .NET / Payments · Harmonics Technology

Jul — Nov 2024 · Remote

Led code reviews and enforced standards across a large-scale payment service library potentially impacting 1M+ users, and contributed to the widely-used Mono API library — refactoring for efficiency and reliability in financial applications.

Software Engineer · Decagon Institute

Oct 2023 — Apr 2024 · Lagos

Improved code quality and user engagement on an ASP.NET Core project, reducing page load time by 40%, and drove cross-functional collaboration and engineering best practices to tighten development cycles.

Algorithmic Programmer & Research Analyst · HyFEX Capital

Jun 2020 — Dec 2022 · Ibadan

Designed and optimized 50+ algorithmic trading systems for market analysis and automated execution, building high-performance financial algorithms using MQL4/MQL5 (C# related) with quantitative modeling and validating strategies against large volumes of market data.

Capability · 04

Technical Expertise

D-01

Backend Engineering

High-performance services and APIs across the .NET stack, concept to production.

C#ASP.NET CoreEF CoreWeb APIBlazor
D-02

Cloud & DevOps

Cloud-native deployment, containers, and automated delivery pipelines.

AzureAWSDockerKubernetesCI/CD
D-03

Distributed Systems

Decoupled, event-driven services that stay fast and resilient under load.

MicroservicesEvent-DrivenCQRSRedisCaching
D-04

AI Engineering

LLM-powered features and agents, grounded with retrieval and orchestration.

OpenAISemantic KernelRAGAI Agentsn8n
D-05

Frontend Engineering

Modern, typed interfaces that stay maintainable as products grow.

ReactNext.jsTypeScriptVueTailwind
D-06

Software Architecture

Clean, testable system design that holds up to change and scale.

Clean ArchitectureSOLIDTDDDDDSystem Design
Recognition · Microsoft

Award Recognition

2nd
PLACE
Recognition · Microsoft · 2026

2nd PlaceMicrosoft AI Skills Week Hackathon

First runner-up for an AI-powered Telco Network Operations Centre — intelligent automation applied to real telecom operations.

AI SKILLS WEEK HACKATHON 2026
Contact · 05

Let's build systems
that scale.

Open to senior engineering, architecture, and AI roles. If you're building something complex, let's talk.

© 2026 Weyinmi MadamedonAvailable · Lagos, NG (UTC+1)Architect · Engineer · Innovate