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Hossein Khalili

Senior Frontend Engineer

Hossein Khalili

Complex Products. Thoughtful Frontends. Built for Production.

I design and build React / Next.js frontends for real-time platforms, trading systems, multi-role dashboards, admin tools, and data-heavy web applications.

Open to selected projects and product teams

Selected work

Complex production frontends — trading, multi-surface exchanges, and multi-role commerce.

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Real-Time Trading

Crypto Exchange — arz.me

Full frontend I built myself — landing plus authenticated exchange (wallet, buy/sell, live prices); other disciplines were a team.

  • Next.js
  • TypeScript
  • Zustand
  • TanStack Query

Multi-Surface Exchange

Crypto Exchange — xpay.co

User trading SPA, ops admin, and digital receipts — historical team contribution, plus ongoing tech-side support.

  • React
  • TypeScript
  • Vite
  • Redux Toolkit

Multi-Role Commerce

Multi-Panel E-Commerce

Admin, warehouse, basket-picker, postman, storefront, and PWA — shared orders, role-specific UIs.

Confidential client work (NDA) — no public URL.

  • Next.js
  • Redux
  • PWA
  • TypeScript

Experience

Current role and recent studios — full dates on the Experience page.

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Companies & products

Studios and brands I've worked with — logos only, no channel attribution.

What colleagues say

Recommendations from LinkedIn — in their own words.

  • Mohammad Shams

    Mohammad Shams

    Front-End developer

    14 Oct 2025 · same team

    I had the pleasure of working with Hossein Khalili at Parsdata, where we collaborated on several frontend projects. Hossein is a highly skilled and detail-oriented developer who consistently delivers high-quality work. He is extremely responsible, reliable, and proactive, always ensuring that tasks are completed on time and to the highest standard. Beyond his technical expertise, Hossein brings a positive attitude and great team spirit, making collaboration smooth and enjoyable. I truly enjoyed working with Hossein and would gladly work with him again. Any team would be lucky to have someone with his dedication and professionalism.

  • Sepehr Baghi

    Sepehr Baghi

    Senior Software Engineer at Avida bank

    25 Sep 2025 · managed directly

    I had the pleasure of working with Hossein, and I can confidently say he is a hardworking and dedicated developer. He approaches his work with great responsibility, always staying well-organized and ensuring tasks are completed to a high standard. Beyond his professional skills, Hossein is kind, supportive, and a true team player. It was a great opportunity to collaborate with him, and I highly recommend him for any team looking for a reliable and talented developer.

  • Adel Yz

    Adel Yz

    Turning impossible into indispensable

    19 Dec 2022 · managed directly

    The most important thing about Hossein is his devotion to the project. He understands the feature and the process very well and deploys it with minimum back and forth. He is a great communicator and works hard to deliver deadlines. Also, during our project, we didn't face any major issues from his end and it was a great experience working with him.

  • Mehrdad Javidan

    Mehrdad Javidan

    Co-Founder and CEO at PARS DATA

    5 Aug 2022 · managed directly

    Highly motivated, responsible, punctual, disciplined, high teamwork spirit, talented, good mannered. He does not fail in doing things and does his best so that the tasks entrusted to him are done in the best way. Very interested in his profession and is often busy even outside office hours. Works very well as a team and interacts with all team members. He has complete mastery over Java Script and React and also using React Hooks and Redux Reducers. It gives great importance to performance and always aims to optimize the output of the program and the size of the output bundle. I had the experience of working with Hossein in the Haland project, especially in the Seller part and I always know him as a responsible, committed and motivated person. Hossein is one of the people I would like to work with again.

  • Mohammad Salimi

    Mohammad Salimi

    Product Manager at ParsPack

    8 Jul 2022 · managed directly

    Hossein is a gifted programmer and talented thinker .Hossein is able to see the big picture yet he displays great attention to detail. he is highly qualified software developer with experience in front-end design and implementations . i have no hesitation in recommending hossein for front-end positions.

  • Milad Karimi

    Milad Karimi

    Back End Developer | Nodejs | Express.js | PHP | Laravel

    4 Jul 2022 · same team

    The team benefits from the diligence and good work of Hossein, who is a valuable team member. Designing pages is very quick with it, and it does this work in a way that matches the design perfectly. In this position, Hossein can be an excellent choice if you need a front-end developer who is persistent.

LinkedIn (opens in new tab)

Tools & stack

Supporting toolkit — React, Next.js, real-time, and state libraries used across the case studies above.

Core

  • JavaScript
  • TypeScript
  • React
  • Next.js

State & APIs

  • Redux
  • Zustand
  • TanStack Query
  • REST API
  • WebSocket
  • Socket.io
  • SignalR

UI

  • Tailwind CSS
  • Radix UI
  • ShadCN
  • Material UI
  • Ant Design
  • SCSS

Building with

  • NestJS
  • Node.js backend patterns

Latest writing

View all

Redux vs Zustand in Multi-Panel E-Commerce

When a warehouse panel and a storefront share a codebase but not the same state shape.

1 min read

Managing Trade State with WebSockets in a Crypto Exchange

Lessons from building live price feeds and order state on arz.me — without over-engineering.

2 min read

Have a complex frontend project in mind?

Open to product teams and selected projects that need production-ready React / Next.js work.