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Erisan Olasheni

@erisanolasheni

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I build scalable financial platforms, distributed systems, and high-throughput backend APIs.

Nigeria

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I've built and launched production financial platforms across fintech, payments, healthcare, education, and technology. At Risevest, I led end-to-end engineering for Hisa 2.0, building its trading platform, wallet, authentication, verification, portfolio, collections, and settlement services.

I design reliable Node.js, TypeScript, Python, and PostgreSQL systems that handle high-throughput transactions, secure authentication, KYC, webhooks, reconciliation, and third-party payment and trading integrations. My work includes cloud deployment on AWS, Docker-based delivery, CI/CD, observability, distributed tracing, and performance testing.

I've also led engineering at GenevaHQ and Alajo Technologies, built distributed services at Vennote, and delivered 70+ projects as a top 1% Freelancer.com Preferred Freelancer. I enjoy owning critical backend services from architecture through production while partnering closely with product, compliance, and operations teams.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Risevest Technologies

Dec 2025 - Aug 2026 (8 months)

Led end-to-end engineering of Hisa 2.0, Risevest's next-generation trading platform, architecting and building a distributed, production-grade financial system from the ground up. Owned core platform services including Auth, Wallet, Verifications, Trading Engine, and Portfolio & Collections, and integrated with global and regional financial partners.

NodeJS TypeScript PostgreSQL AWS Docker REST APIs Microservices Distributed Systems Event Driven Architecture Authentication KYC Payment Integration Webhooks Reconciliations CI CD Observability

Senior Backend Engineer

Vennote Technologies

Sep 2024 - Nov 2025 (1 year 2 months)

Architected and maintained Aurora Core Service, the central microservice powering Airtime, Voucher, Wallet, and Chatbot operations. Spearheaded APM using OpenTelemetry and SigNoz, led k6 load testing, and integrated chatbot-to-human handover with RingCentral.

NodeJS Express PostgreSQL Docker Docker Compose OpenTelemetry SigNoz REST APIs Microservices Observability Distributed Tracing RingCentral

Chief Technology Officer

GenevaHQ

Dec 2023 - Aug 2024 (8 months)

Architected and implemented a lending platform using Node.js and NestJS microservices, built the company's main website and customer portal with Next.js, and established CI/CD pipelines using GitHub Actions, improving deployment efficiency by 25%.

NodeJS NestJS Next.js TypeScript Python PostgreSQL REST APIs CI CD GitHub Actions Jest Cypress Microservices

Vice President of Engineering

Alajo Technologies

Apr 2022 - Feb 2023 (10 months)

Engineered a secure backend system using Node.js and NestJS, developed the marketing website with Next.js, and led the technical initiative that secured $100,000 in pre-seed funding. Achieved 99.9% system uptime through comprehensive monitoring.

NodeJS NestJS Next.js TypeScript Python PostgreSQL TypeORM RabbitMQ Jenkins GitHub Actions CI CD Monitoring

Senior Full Stack Developer

Manyactive

May 2021 - Jan 2023 (1 year 8 months)

Built the main corporate website and fitness platform using Next.js and TypeScript, architected NestJS microservices, and implemented Python data processing services. Achieved 95% test coverage and developed algorithms that facilitated a 12% reduction in users' calorie consumption.

Next.js TypeScript React NestJS Python PostgreSQL Cypress Jest Microservices REST APIs

Senior Full Stack Engineer

Freelancer.com

Jun 2018 - Jan 2022 (3 years 7 months)

Developed Python/Django applications with complex business logic, built NestJS backends, and created type-safe frontend applications using TypeScript and React. Maintained 100% project success rate across 70+ projects and achieved TOP 1% Preferred Freelancer status globally.

Python Django NestJS TypeScript React SQL Database Optimization

Full Stack Team Lead

SIIT Online Training

Jan 2014 - Feb 2018 (4 years 1 month)

Developed certification system using Python/Django and Node.js/Express APIs, created dynamic frontend interfaces with JavaScript and React, and managed PHP applications. Built REST APIs serving 400,000+ users and increased signup rate by 1,200%.