just2102
Senior Full Stack Engineer
Full Stack Engineer with 5+ years of experience building high-performance systems, bridging backend architecture with seamless and secure user interfaces.
Uniswap-backed Atrium Academy alumnus.
Turned latency into loyalty for >10k DAU in one year.
At Genome I cut Time to First Byte from 2.6s to 1.27s and implemented scalability solutions, extending the user base by onboarding thousands of traditional gamers.
Here, as the lead full stack developer, I led a team of 5 engineers, including 2 junior ones, whom I mentored and pair programmed with, enabling them to take ownership of their own features in just 3 months.
I led the platform to mainnet release, successfully scaling up to 10,000 DAU and over 400,000 total users, implementing both frontend and backend caching solutions and optimizing API requests.
Earlier, at Cryptohopper, where I focused on implementing full stack solutions for a cryptocurrency arbitrage platform, I led a redesign that lifted conversion by 34% and added new payment options, including an open-source solution, which increased revenue by over 14%.
In this role, I gained the expertise to independently deliver end-to-end web applications, including the backend (Node.js/Nest.js) and infrastructure (AWS).
My core tech stack includes:
Frontend: JavaScript / TypeScript, React / React Native, Next.js.
Backend: Node.js, NestJS, Python, FastAPI.
Smart Contracts: Solidity, Foundry.
Skills:
Languages: TypeScript, JavaScript, Node.JS, Solidity, HTML/CSS, Golang, Python.
Frameworks & Libraries: React, React Native, Next.js, SvelteKit, Nest.JS, Express, FastAPI, React Query, Wagmi, Tailwind CSS, Material UI.
Databases & ORM: Redis, MongoDB, PostreSQL, Sequelize, Prisma.
State Management: Redux, Redux Toolkit (RTK), React Query, Context API, Zustand, MobX.
Infrastructure & DevOps: AWS (Lambda, SQS, EC2), Docker, WebSockets, Webpack, Vite, GraphQL, REST API, GitHub Actions, GitLab CI/CD, Vercel.
Web3 & Fintech: Blockchain, Ethereum, Solana, Aptos, Account Abstraction (ERC-4337), Safe API SDK.
Testing/QA: Jest, Vitest, Playwright, Storybook.
Uniswap-backed Atrium Academy alumnus.
Turned latency into loyalty for >10k DAU in one year.
At Genome I cut Time to First Byte from 2.6s to 1.27s and implemented scalability solutions, extending the user base by onboarding thousands of traditional gamers.
Here, as the lead full stack developer, I led a team of 5 engineers, including 2 junior ones, whom I mentored and pair programmed with, enabling them to take ownership of their own features in just 3 months.
I led the platform to mainnet release, successfully scaling up to 10,000 DAU and over 400,000 total users, implementing both frontend and backend caching solutions and optimizing API requests.
Earlier, at Cryptohopper, where I focused on implementing full stack solutions for a cryptocurrency arbitrage platform, I led a redesign that lifted conversion by 34% and added new payment options, including an open-source solution, which increased revenue by over 14%.
In this role, I gained the expertise to independently deliver end-to-end web applications, including the backend (Node.js/Nest.js) and infrastructure (AWS).
My core tech stack includes:
Frontend: JavaScript / TypeScript, React / React Native, Next.js.
Backend: Node.js, NestJS, Python, FastAPI.
Smart Contracts: Solidity, Foundry.
Skills:
Languages: TypeScript, JavaScript, Node.JS, Solidity, HTML/CSS, Golang, Python.
Frameworks & Libraries: React, React Native, Next.js, SvelteKit, Nest.JS, Express, FastAPI, React Query, Wagmi, Tailwind CSS, Material UI.
Databases & ORM: Redis, MongoDB, PostreSQL, Sequelize, Prisma.
State Management: Redux, Redux Toolkit (RTK), React Query, Context API, Zustand, MobX.
Infrastructure & DevOps: AWS (Lambda, SQS, EC2), Docker, WebSockets, Webpack, Vite, GraphQL, REST API, GitHub Actions, GitLab CI/CD, Vercel.
Web3 & Fintech: Blockchain, Ethereum, Solana, Aptos, Account Abstraction (ERC-4337), Safe API SDK.
Testing/QA: Jest, Vitest, Playwright, Storybook.
Experience: 5 years
Yearly salary: $100,000
Hourly rate: $50
Nationality: 🇷🇸 Serbia
Residency: 🇷🇸 Serbia
Experience
Frontend Developer
Pontem Wallet 2024 - 2024
On Pontem’s experimental team, I worked with partners to build their integrations into our core product. Delivered unique widgets on multiple chains, including Solana Jupiter DEX and Hellomoon NFT Marketplace. Designed an Aptos blockchain transaction parser, allowing to efficiently display user history. Technologies & Skills: TypeScript, React, Browser Extensions, Viem, Aptos, Solana, Blockchain, Ethereum, NFT, JavaScript, CSS, HTML, SCSS, SASS, Tailwind.
Full Stack Developer
Genome 2024 - 2026
At Genome, I led the delivery of core features and implemented robust scaling solutions to ensure high-performance and rapid user growth (from 10 thousand to 400 thousand users) of a gaming platform. Implemented scalability solutions for efficient API integrations, including client-side and server-side data caching. Reduced Time to First Byte (TTFB) from 2.6s to 1.27s (51% faster) by implementing page caching, boosting page-load speed and SEO performance. Integrated Account Abstraction solution to onboard over 9 thousand web2 users in the first month. Mentored Junior developers. Technologies & Skills: TypeScript, React, Next.js, Data Caching, Web3, Redis, React Query, Wagmi, Solidity, Tailwind, ethers.js, web3.js, Viem, WebSockets, REST API, Node.js.
Full Stack Developer
Cryptohopper 2021 - 2024
I led the development of core features for a cryptocurrency arbitrage platform, building both frontend and backend systems that empowered users to capitalize on price differences between exchanges. Boosted revenue 14.5% by integrating new payment options. Implemented a full platform redesign, leading to a 34% rise in conversion rate and improving user experience. Engineered and deployed a high-frequency cross-exchange trading algorithm. Built real-time market data pipelines across multiple exchanges, including Bybit, Binance, and OKX. Technologies & Skills: React.js, Node.js, Nest.JS, Redis, AWS, MongoDB, Webpack, Lambda, API Design, JavaScript, React, TypeScript, SQS, Stripe, REST API, WebSocket, HTML, CSS, SASS.
Skills
ethereum
nestjs
nextjs
full-stack
english
japanese
russian