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Technical leader building real-time, high-throughput products — from trading platforms to learning ecosystems.

Technical leader — Fartak / Full-stack engineer

Based in TehranLocal time
Experience10+ years shipping
StackNode · NestJS · Next.js · .NET
Next — AboutScroll ↓
About / 01
Portrait of Sina Mashini

About me

I am an experienced developer with a solid background in a wide range of .NET and Nodejs development aspects in a business application context. My expertise includes all development stages, from initial analysis through design and execution. I am proficient in a variety of platforms and systems. In addition to my technical skills, I am a great communicator and team player. My ability to communicate well enables me to work effectively with clients to identify objectives and requirements for applications.

May 2026 - Present

Technical Leader

Fartak

Lead technical direction for real-time trading platforms (Finance & Inchart). Built high-throughput gRPC, WebSocket & message queue architectures with Node.js, NestJS, Fastify, and Next.js.

Selected Writing

Notes on building maintainable software, from interface details to architecture decisions.

01React / FormsMedium

Building a Validated Form in React.js with Next.js, TS, MUI, Formik & Yup

Build a complete form with a clear validation flow using React, Next.js, TypeScript, Material UI, Formik, and Yup.

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02Architecture / DIMedium

The Medical Marvel of Dependency Injection: A Prescription for Software Health

A practical analogy for dependency injection and how it improves modularity, reuse, testing, and long-term software health.

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03Localization / DIMedium

Seamless Translation: Harnessing Dependency Injection

Use dependency injection with JavaScript, Python, and Amazon Translate to build flexible translation workflows for slugs and JSON data.

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Selected work / 08

Built for the real world.

I design and ship digital systems across fintech, learning, communities, creator platforms, and developer tooling.

Selected projects — not a complete archive
  1. 01 / 08

    The Finance

    A unified financial ecosystem bringing market intelligence, professional analysis tools, education, and investment decision support into one product.

    Financial IntelligenceProduct Engineering
  2. 02 / 08

    Lernito

    A 360-degree learning ecosystem connecting students, teachers, counselors, and schools through interactive books, smart assessments, micro-lessons, and live classes.

    Learning SystemsProduct Engineering
  3. 03 / 08

    HighThere

    A community-driven social product built around discovery, shared interests, and meaningful connection.

    Digital CommunityProduct Engineering
  4. 04 / 08

    Aida Naderi

    A cinematic creator portfolio and brand collaboration hub that turns visual storytelling, audience reach, and campaign work into an editorial digital experience.

    Creator PlatformDigital Experience
  5. 05 / 08

    Open Design

    A local-first, open-source design engine that helps coding agents produce prototypes, interfaces, presentations, images, and video as real files.

    Agentic Design ToolsOpen-source Contributor
  6. 06 / 08

    ts-function-to-arrow

    An npm CLI that converts TypeScript function declarations into arrow functions, built to make repetitive refactoring fast and predictable.

    Developer ToolingCreator & Maintainer
  7. 07 / 08

    Dej

    An online content and brand protection platform focused on combating copyright infringement, content piracy, brand impersonation, and reputation abuse across social media and digital platforms.

    Brand ProtectionProduct Engineering
  8. 08 / 08

    Pellonia

    An AI-powered anti-piracy and intellectual property protection platform that helps creators and businesses detect and remove unauthorized content while protecting copyrights, trademarks, brands, and digital identities across the web.

    IP ProtectionProduct Engineering

Words from the people in the room

Trusted in practice.

01 / 02

REF.01

I worked with Sina on the same team for about a year. He is not only a skilled developer, but a good friend too.

Sina was already a professional full-stack .NET developer when he joined our team. He challenged himself by entering a new world and quickly became an expert in Node.js and React. I highly recommend him because he has proven that he is never afraid of change or learning new technologies.

Sina is an honest and friendly person, and I am delighted that I had the chance to work with him.

Poorshad ShaddelFull Stack Developer at Red Bull

Independent recommendations