Hi, I'm Răzvan Gabriel Apostu
I'm a product design engineer passionate about building end-to-end.
I enjoy taking ideas from design to code and into the hands of users. Fluent in web 2 + 3.
My most recent adventure was as a co-founder and product lead at Sablier. I’m now looking for a new challenge.
Work & Projects
Sablier
Co-Founder and CPO
2019 / 2022 - 2026
Onchain vesting, airdrops & continuous payments for 350,000+ users. Designed the brand, interfaces and led the full-stack product engineering team.
Product
- Established the brand guidelines and visual identity
- Designed the apps, marketing websites and overall design system (Figma, PS/AI)
- Implemented the UIs in React / Next and themed auxiliary websites (e.g. docs)
- Formalized the architecture of the codebase and hand-picked each item in the stack
- Developed data indexers (The Graph, Envio) and integrated onchain content into the app (read/write)
- Worked with and mentored the growing product team to increase our output
- Consulted for technical integrations, worked on BD at events and 1:1 with clients
Engineering
- Integrated web3 APIs for EVM and Solana web apps
- Created abstractions over viem, wagmi, @solana/web3.js and other web3 components
- Implemented backend services in Rust and JS/TS to scale for campaigns with > 1M users
- Optimized state management and workflows (in app) with zustand, tanstack, xstate
- Developed complex models and data querying systems on top of GraphQL, Redis and PostgreSQL
- Invested time in code-quality guards (linters, formatters), telemetry and CI/CD
- Implemented caching, rate-limiting and anti DDOS measures
- Coordinated the entire engineering team towards quarterly product releases
- Audited and contributed to the architecture of the smart contracts & programs
- Built public source sandboxes
- Iterated on an internal framework for building and designing with AI agents
Branding
- Designed dynamic SVG NFTs for our smart contracts
- Collaborated with 3D artists to create brand assets
- Directed a promotional launch video to support our V2 release
- Created small motion promos using Rotato and After Effects
- Experimented with dynamic OG image generation and Farcaster frames
- Created, extended and enforced the Sablier design system
Pods
Product Designer
2020 - 2022
Design and engineering for the Pods options & yield protocols. Single-handedly created web3 UIs, alongside brand assets and business development.
Product
- Designed and built the marketing websites and core web3 apps
- Created the design system (Figma) and implemented it in React / Next
- Integrated Ethereum smart contracts using ethers.js, web3.js, useDApp
- Engineered public-source solutions for data indexing (The Graph) and integrations (sdk)
- Developed the Yield app, a 1-click-deposit investment into principal protected vaults
- Developed the Options app where users could trade options against a proprietary AMM
- Implemented Airdrip, an onchain stock options app for contributor incentives
- Designed all the marketing and brand related assets
- Helped with business development and sales 1:1 with customers or during events
Greenfish
Blockchain consultant
2021
Architecture and proof-of-concept for a suite of web3 broadcasting tools. Various content distribution MVPs and creator utilities on top of Eluv.io's Fabric.
Van
Full Stack Design & Dev
2017 - Now
20+ projects across branding, visual identity, socials, web and mobile design and development. End-to-end products for startups and businesses in a variety of fields.
Work
- Designed and developed for 20+ customers
- End-to-end products from brand and ideation to UI design, frontend and backend
- Visual identity and branding materials in Figma / Sketch, Photoshop, Illustrator, AE/C4D
- Implemented across the stack from PHP to native JS/TS or React, from MySQL to NoSQL (Mongo, Dynamo)
- Built mobile apps (native Java for Android and cross-platform with React Native)
- Provided consultancy in system design, blockchain applications and product
- Worked with startups, accounting and legal offices, food delivery platforms
- Built internal management systems, front-facing user interfaces and marketing websites
Project: Intel
Tag-team with Claude
2026
Experimented with AI on a market-watching hub. Created for tracking stocks, ETFs, crypto, options, polymarket etc. in a clean UI.
Project: ConnSuite
Founder
2017 - 2018
A tool focused on efficient contact sharing in the age of countless social media accounts. A top-5 product of the day on Product Hunt.
Skills
In pursuit of infinite learning, I went from designing brands and user interfaces, to coding polished software across the stack, managing teams and architecting scalable infrastructure handling millions in onchain value. Today, I'm exploring new ways to prompt taste and enhance my workflows to deliver cool digital products.
Visuals
Brand
UI
Product
Landing
Figma
Illustrator
Architecture
Web
Mobile
Backend
Frontend
R&D
Next.js
React
Motion
CSS
GraphQL
SQL
Vercel
Typescript
Zustand
Tanstack
Wagmi / Viem
Solana
Ethereum
Indexers
EVM
IPFS
Agent Skills
Startups
Education
I have a Bachelor's degree in Computer Science from Alexandru Ioan Cuza University of Iași, Romania (2020). I've been a self-taught designer and software engineer since 2015.
Showcase
For a breakdown of my contributions to the most significant projects in my portfolio, please visit www.razgraf.com and check out the case studies () or simply reach out. I'm actively looking for senior remote roles in product engineering, product design, or product management.