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Hamed HafezniaHH
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Hamed Hafeznia

@hamedhafeznia

Full-Stack Engineer at Venga who shipped Stripe-powered commerce and Swift camera features used for 1M+ photos.

Estonia
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At Venga, I opened a paid revenue stream with a Stripe-powered social club and contributed to investor funding with a POV camera and real-time Socket.io chat averaging 5,000 messages a day. I also engineered a custom Swift camera module used for 1M+ photos and an iOS Live Activity bridged into the React Native app.

At Portfolii, I built an AI onboarding pipeline that reduced onboarding time by 40%, and a LangChain RAG agent that matched candidates to recruiters' prompts across 3,000+ resumes. As one of three engineers, I owned the product end to end, from React and Next.js through Node.js Cloud Functions on Firebase and GCP.

Earlier, I built a Next.js SSG pipeline at Snappfood that cut landing-page delivery time from about five days to two on a platform with 20M+ registered users. Across my work, I've shipped web and mobile products with React, React Native, TypeScript, and Node.js.

Experience

Work history, roles, and key accomplishments

VE

Senior Full-Stack Engineer

Venga

Feb 2025 - Aug 2026 (1 year 6 months)

Opened a new paid revenue stream with a Stripe-powered social club and contributed to investor funding with a POV camera and real-time Socket.io chat averaging 5,000 messages per day. Engineered a custom Swift native camera module and iOS Live Activity, and directed end-to-end architecture of main features across Next.js, React Native, and Node.js on a 5-person remote team.

PO

Senior Full-Stack Engineer

Portfolii

Jan 2023 - Jan 2025 (2 years)

Decreased onboarding time by 40% and increased profile completion by about 40% by building an AI onboarding pipeline with streaming responses and output validation. Built a LangChain RAG agent with vector embeddings and the OpenAI API that matched candidates to recruiters' natural-language prompts across 3,000+ resumes for about 50 recruiters.

SN

Frontend Engineer

Snappfood

Jul 2019 - Nov 2021 (2 years 4 months)

Decreased landing-page delivery time from about 5 days to 2 by building a Next.js SSG pipeline that let marketing ship content and design changes without engineering, on a platform with 20M+ registered users. Reduced daily login failures by about 50% by rebuilding the legacy login flow with modern React patterns.

SA

Frontend Engineer

Salamati24

Jun 2018 - Jul 2019 (1 year 1 month)

Reduced call-center inquiries by 30% and significantly reduced failed booking attempts by delivering automated appointment booking with the team, on a platform listing about 200,000 doctors and handling 20,000+ appointments. Improved page load performance and reduced recurring bugs by migrating a legacy jQuery codebase to React and TypeScript.

SE

Freelance Frontend Developer

Self Employed

May 2017 - May 2018 (1 year)

Increased direct bookings by about 20% and supported a flight agency's business expansion by building its flight booking platform in Angular and a payment dashboard in React. Delivered 5 web application projects for 3 clients in React and Angular, working remotely.

KA

Frontend Developer

Kaspid (Web Agency)

Aug 2016 - Apr 2017 (8 months)

Delivered end-to-end frontend development for about 8 client projects across retail, hospitality, and professional services using HTML5, CSS3, and jQuery.

Education

Degrees, certifications, and relevant coursework

SU

Sadjad University

B.Sc., Software Engineering

2013 - 2017

Pursued a Bachelor of Science in Software Engineering, completing the program in 2017.

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