# Isaac John Isaac John is a remote worker on Himalayas, Full Stack Engineer at Accesstack Solutions, based in Nigeria. Source: https://himalayas.app/@isaacjohn ```text Backend engineer building P2P crypto trading systems at Bibuain Unique Multipurpose Limited, including an automated trade ingestion and FIFO assignment engine. ``` | Detail | Value | | --- | --- | | Availability | Looking for a job | | Location | Nigeria | | Authorized to work in | Nigeria | | Salary expectations | 30k+ USD | | Job categories | Software Engineer, Full Stack Engineer, Engineering Manager, Product Manager | | Skills | Backend Development, Distributed Systems, Event Driven Architecture, Microservices, Trading Systems, Payment Processing, REST APIs, System Design, Database Design, DevOps, CI CD, Production Deployment, Build Automation, Web Scraping, Testing Automation | | LinkedIn | https://linkedin.com/in/olawaleisaac | ## What I'm looking for ```text I’m looking for opportunities in fintech, distributed systems, or automation-heavy platforms where engineering quality, thoughtful system design, and ownership matter. I’m available for global remote contract or EOR roles with overlap across US time zones. ``` ## About ```text At Bibuain Unique Multipurpose Limited, I led backend architecture and development for a multi-tenant SaaS platform automating P2P crypto trading operations. I built an automated trade ingestion and FIFO assignment engine integrated with the NoOnes P2P exchange API, using concurrency-safe locking to prevent double assignments. At Accesstack Solutions, I built the backend for a multi-tenant school management SaaS, including a student progression engine and responsibility-based access controls. I also shipped full-stack features and owned the deployment lifecycle, from Docker builds and database migrations to maintaining 550+ Jest tests. At Olystique Ltd., I lead engineering across architecture, development, deployment, and product decisions. I’m open to opportunities in fintech, distributed systems, or automation-heavy platforms, including global remote contract or EOR roles with US time-zone overlap. ``` ## Experience ### Full Stack Engineer (current) Accesstack Solutions. Aug 2026 - Present ```text • Built the backend for a multi-tenant school management SaaS (NestJS, TypeORM, PostgreSQL) covering academic sessions, staff, students, and end-of-session progression. Merged 65+ pull requests in the first few months. • Designed a robust access model where permissions follow responsibility (e.g., class teacher, parent, student), enforced via a centralized access service and permissions guard. ``` ### Head of Engineering & Product (current) Olystique Ltd. Jan 2026 - Present ```text I lead engineering at Olystique, turning product ideas into reliable software from architecture and development to deployment and ongoing improvements. My role spans fullstack engineering, DevOps, and product decisions. I manage cloud infrastructure, automate delivery workflows, and guide technical priorities, balancing what users need with what we can build and maintain well. I stay hands-on thro ``` ### Lead Engineer Bibuain Unique Multipurpose Limited. Jul 2025 - Oct 2026 ```text Led backend architecture and development of a multi-tenant SaaS platform automating P2P crypto trading operations FastAPI, PostgreSQL, Redis, improving vendor operational efficiency by 40. Engineered an automated trade ingestion and FIFO auto-assignment engine integrated with the NoOnes P2P exchange API, using concurrency-safe row-level locking SELECT … FOR UPDATE SKIP LOCKED to eliminate double-a ``` ### Backend engineer Hoshis Tech Corp. May 2025 - Aug 2026 ```text Architected and scaled event-driven backend systems for payments, authentication, and real-time event processing, improving system scalability. Designed and implemented asynchronous transaction workflows using RabbitMQ, enabling reliable, fault-tolerant processing of high-volume financial operations Built a payment processing system with webhook handling, reconciliation flows, and multi-currency ``` ### Back End Developer Mecurixtech. Feb 2025 - May 2025 ```text Implemented an order tracking system for the admin panel, improving order status visibility for vendors and customers, reducing support queries by 40%. Developed product category management where admins create categories, and vendors select them during product creation, ensuring structured inventory organization and improving product classification accuracy by 35%. Designed serializers and API end ``` ### Back End Developer UPNyX Innovative Solutions Pvt Ltd. Sep 2024 - Mar 2025 ```text Optimized web scraping scripts using Python, improving data retrieval speed by 40% and reducing server load by 30%. Enhanced the scraping process to handle large datasets, increasing scalability by 50% and ensuring seamless integration across multiple data pipelines. Implemented robust data validation and error-handling mechanisms, ensuring 95% data accuracy and reliability. Integrated automate ``` ### Back End Developer Osteomemo. Sep 2024 - Mar 2025 ```text Developed and maintained a secure, scalable backend system using NestJS and MongoDB, optimizing patient data management and complex healthcare workflows. Engineered end-to-end modules to capture patient visits, treatments, diagnoses, and payment data, improving data accuracy by 30%. Implemented advanced MongoDB schemas that reduced query times by 40%, enhancing data retrieval for medical and finan ``` ### Software Engineer Upnyx Innovative Solutions. Sep 2024 - Mar 2025 ```text Optimized web scraping scripts using Python, improving data retrieval speed by 40 and reducing server load by 30. Enhanced data pipelines to handle large-scale datasets, improving scalability by 50 and streamlining integration. Implemented robust data validation and error-handling mechanisms, ensuring 95 data accuracy and reliability. Integrated automated scheduling and logging systems, reducing m ``` ### Software Engineer Guara framework. Jan 2025 - Feb 2025 ```text Improved test automation efficiency by integrating WinAppDriver with the Guará framework, reducing manual test execution time by 50% and improving validation accuracy. Developed setup and teardown transactions to enhance automation reliability and manage the lifecycle of WinAppDriver and undetected-chromedriver, increasing test execution stability by 40%. Automated web interactions while bypassing ``` ### Back End Developer Tifi TV. Jul 2024 - Aug 2024 ```text I am currently part of an apprenticeship team working on improving Tifi.tv, an AI-driven video platform designed to personalize content delivery and enhance user engagement. I have been actively involved in backend development efforts, contributing to optimizing API integrations, improving content retrieval processes, and implementing strategies to enhance system performance. This apprenticeship h ``` ### Back End Developer HNG Tech. Jul 2024 - Aug 2024 ```text Led backend development of an AI-driven platform, utilizing asynchronous processing to improve system performance by 20%. Optimized database queries and indexing strategies, reducing query response times by 35% and boosting system efficiency for content retrieval. Integrated advanced APIs to enhance system scalability, improving uptime and reducing system downtime by 15%. Contributed to a collabor ``` ### Back End Developer HNG Mentorship. Jul 2024 - Aug 2024 ```text Spearheaded backend development for an AI-driven platform, enhancing performance by 20 through asynchronous processing. Streamlined database operations by optimizing queries and indexing strategies, reducing query processing times by 35, and improving system scalability. Integrated advanced APIs to enhance scalability, reduce downtime by 15, and increase system uptime. Drove a 25 boost in project ``` ### Software Engineer [alx\_africa](https://himalayas.app/companies/alx_africa). May 2023 - Jul 2024 ```text Spearheaded process re-engineering projects, optimizing web application performance by 30% using advanced Python frameworks. Designed and deployed scalable database systems using MySQL, PostgreSQL, and Redis, improving data retrieval speeds by 50%. Administered server configurations and deployments, increasing operational efficiency by 30% and reducing system downtime by 20%. Delivered complex web ``` ### Software Engineer ALX Africa. May 2023 - Jul 2024 ```text Spearheaded process re-engineering, optimizing web application performance by 30 through Python-based frameworks. Deployed scalable database systems using MySQL, PostgreSQL, and Redis, improving data retrieval speeds by 50. Configured and deployed servers, increasing operational efficiency by 30 and reducing downtime by 20. Delivered a complex Airbnb-like web application, enhancing scalability by ``` ## Education ### Holberton School Computer Software Engineering ### ALX Corp. Bachelor of Software Engineering, Full Stack, Backend Focus ### African Leadership Experience Associate's degree, Computer Software Engineering. 2023 - 2024 ## Tech stack - Selenium - DigitalOcean - MySQL - PostgreSQL - MongoDB - Node.js - Django - Next.js - NestJS - Redis - Jest - JavaScript - Python - C - Streamlit - RabbitMQ - Celery - Django REST framework - FastAPI - TypeORM - Appium - Socket.IO - TypeScript - Git - Docker - NGINX - DigitalOcean Spaces - Amazon Web Services (AWS) - Playwright - TanStack Query - REST APIs To contact Isaac, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire). ## People also viewed - [evanson igiri](https://himalayas.app/@evansonigiri): Senior Software Engineer, Chipcolate - [Odisi Ebiyeladou Emmanuel](https://himalayas.app/@odisiebiyeladouemman): Platform Engineer, Apt Response - [Jamal Abdullahi](https://himalayas.app/@jamalabdullahi): Backend Engineer (Contract), Thornbridge Solutions - [Timothy Nuga](https://himalayas.app/@timothynuga): Senior Backend Engineer, Chef4me - [Anslem Kelechi](https://himalayas.app/@anslemkelechi): Senior Software Engineer, Creditveto - [Erisan Olasheni](https://himalayas.app/@erisanolasheni): Senior Software Engineer, Risevest Technologies - [Mcdavid Emereuwa](https://himalayas.app/@mcdavidemereuwa): Lead Engineer, Westmetro - [ABRAHAM JUDE](https://himalayas.app/@abrahamjude): Senior Full Stack Engineer, Thelix Holdings - [Muhammad Giwa](https://himalayas.app/@muhammadgiwa): Founder & CTO, SmartEdu - [sanctus peter](https://himalayas.app/@sanctuspeter): Head of Technology, Slash Finances