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Tadashi Haroku

@tadashiharoku

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Senior Full-Stack Developer with expertise in scalable web applications.

Egypt

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What I'm looking for

I am looking for a role that fosters innovation and collaboration, where I can leverage my full-stack development skills to create impactful solutions.

With over 5 years of comprehensive experience in full stack software development, I specialize in building scalable, high-performance web applications with a focus on Node.js backend architecture. I excel at designing RESTful APIs, integrating modern frontend frameworks like React, Angular, and Vue.js, and optimizing database performance.

I have successfully led and delivered multiple projects—from small MVPs to enterprise-grade platforms—collaborating closely with cross-functional teams to ensure seamless user experiences. Passionate about writing clean, maintainable code and solving complex technical challenges, I thrive in dynamic environments where innovation and reliability are key.

Experience

Work history, roles, and key accomplishments

Backend Developer

Sandlin Consulting

Dec 2024 - Present (7 months)

Designed schemas for both MongoDB (NoSQL) and PostgreSQL (relational) based on project needs. Used 2-phase commits, session-based transactions, and schema validation with Mongoose. Improved query latency by 30–50% and ensured data integrity under load. Deployed backend via Dockerized apps on custom Ubuntu servers with Nginx. Used Docker Compose, env validation, and multi-stage builds for both fron

MongoDB PostgreSQL Mongoose Docker Nginx Docker Compose Multer AWS S3 Connection Pooling

Full-Stack Developer

OctoCode

Sep 2023 - Present (1 year 10 months)

Built RESTful APIs with Express.js and GraphQL APIs using Apollo Server. Implemented authentication (JWT, OAuth2) and authorization middleware. Replaced parts of the API with GraphQL to allow clients to request exactly what they need. Applied GraphQL persisted queries, DataLoader, and HTTP caching with ETags. As a result, improved API response performance by up to 40% and reduced client-side data

GraphQL Apollo Client JWT OAUTH2 Sentry Socket.IO Vercel Docker Render

Web Developer

IGenia Direct

Nov 2021 - Present (3 years 8 months)

Designed and developed full stack applications using Node.js (Express.js) and React with MongoDB as the data layer. Introduced OpenAPI (Swagger) documentation and Joi, shared between client and server to reduce frontend-backend integration bugs by 70% and improved developer velocity. Built reusable UI components with TailwindCSS. Created and enforced a design system, centralizing typography, spaci

Node React MongoDB OpenAPI Swagger Joi TailwindCSS JWT OAUTH2

Education

Degrees, certifications, and relevant coursework

El-Shorouk Academy

Bachelor’s Degree, Computer and Information Technology

Completed a Bachelor’s Degree in Computer and Information Technology. The curriculum covered various aspects of computer science and information technology, preparing for a career in software development.