Hi, I'm

Chukwuduzie
Blaise

Software Engineer·(Backend)

with a specialization in Fintech systems, I build fault tolerant APIs, distributed systems, and data-intensive applications that perform at scale.

View My WorkLet's Talk
Chukwuduzie Blaise

01. About

The engineer
behind the code.

With 3+ years of Experience, I specialize in building Fintech systems that are data-intensive. I design and develop robust backend APIs that power transactions and payments systems with a good eye for quality and clean code principles. I pay attention to details and adhere to industry best practices like ACID compliance, data integrity, and security.

I have deep expertise in wallet systems , enforcing double-entry ledger, idempotency, asynchronous processing to handle high loads without downtime while maintaining security. I ensure reliability of systems through unit Tests, E2E testing for full application flows.

When I'm not thinking about idempotency keys or row-level locking, I work on the frontend too. React feels different when you've built the API it's calling.

Location

Lagos, Nigeria

Experience

3+ Years

Focus

Backend · Fintech

Status

Open to Offers

02. Projects

Work that ships
and scales.

Production·Node.jsPostgreSQLRedisREST APIsWebhooks

Mono-Parser

A B2B API-first credit scoring and decisioning engine. Mono Parser helps loan officers at fintech companies make better-informed lending decisions by processing bank data through a rule-based scoring engine and returning clear, it is an event driven system with Webhook delivery.

GitHubLive

Architecture

  • ─Microservices: NestJS gateway layer + FastAPI scoring engine
  • ─Async job queues (BullMQ) end-to-end pipeline under 30s latency
  • ─Webhook system with retry mechanisms + signature-based authentication
  • ─Gemini AI integration for explainable loan decision generation
  • ─Rule-based decisioning engine with knockout rules + affordability checks
Github·Node.js(Express)MySQLKnex.jsTypeScriptJest

Pera Wallet Service

A secure wallet system built for fintech operations and Lending, users can fund, transfer, withdraw and view transaction history for disputes and review.

GitHubLive

Architecture

  • ─ACID compliant wallet infrastructure for Lending and Fintech Transactions
  • ─Idempotency keys prevent duplicate disbursements on retry
  • ─Row-level locking for finance transactions to prevent dead locks and ensure data consistent fund transfers
  • ─Transaction history logs with references tied to senders and receivers enforced on database level to avoid Transaction Disputes
Client project·Node.jsMongoDBReactAWS EC2

Merez Logistics

A B2B Logistics Web application desgined to handle 10,000 concurrent food deliveries daily between customers and businesses with their Dispatch Riders

GitHubLive

Architecture

  • ─Multi-tenant backend architecture on MongoDB powering web and Mobile applications between riders, food vendors and customers
  • ─Websockets for real-time chatting and customer support
  • ─Rider tracking and realtime map usage for customers
  • ─React dashboard with real-time updates for vendors and Admin to monitor application statistics.

03. Stack

Tools of the trade.

Backend

  • Node.js
  • TypeScript
  • MySQL
  • PosstgreSQL
  • MongoDB
  • Redis
  • REST APIs
  • Microservices

Frontend

  • React
  • Next.js
  • Tailwind CSS
  • TypeScript
  • Vite

Infrastructure

  • AWS
  • Docker
  • Kafka
  • EventBridge
  • Lambda Functions
  • Github Actions(CI/CD)

Practices

  • Communication
  • TDD
  • ACID Transactions
  • Event-Driven
  • Agile / Scrum

04. Contact

Let's build
something.

I'm currently open to new opportunities. If you're building something in fintech, payments, or distributed systems — I'd love to talk.

duzieblaise10@gmail.com
GitHub ↗LinkedIn ↗X ↗

Designed & built by Akalonu Chukwuduzie Blaise