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Mark John Saspa

@markjohnsaspa

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Web3 & ENS developer shipping production Ethereum apps with pixel-perfect React and smart contracts.

Philippines

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What I'm looking for

I’m looking for Web3 roles where I can ship production Ethereum/ENS products, own full-stack execution, and collaborate on product growth—using AI-assisted workflows to deliver fast while keeping quality high.

I’m a Full Stack & Web3 Developer with 5+ years of experience building production applications—from pixel-perfect React frontends to on-chain Ethereum integrations. I’ve shipped 8 blockchain-focused projects including ENS marketplaces, domain valuation engines, decentralized identity systems, and on-chain trading interfaces, integrating Ethereum, ENS, ethers.js, viem, and XMTP across real products.

I’m especially effective at bridging technical execution with business strategy, which makes me a strong fit for roles at the intersection of Web3 and product growth. I actively use AI-native development tools (Replit AI, Cursor, Claude Code, Bolt.new) to move faster while staying focused on production-grade quality and maintainable architecture.

Experience

Work history, roles, and key accomplishments

Full Stack Web3 Developer

Glen Cove Company

Jan 2024 - Jan 2026 (2 years)

Wrote and deployed smart contracts and built full-stack Web3 applications in a collaborative US remote team. Led strategic planning with realistic timelines across frontend and backend workstreams.

Next.js TypeScript Solidity Smart Contracts PostgreSQL Redis AWS Replit AI Tools

Web3 & ENS Developer

Independent / Replit Projects

Jan 2024 - Jan 2025 (1 year)

Built 8 production blockchain applications including an ENS marketplace, domain valuation engine, decentralized identity app, AI transcription platform, on-chain ETF tokenization, and an on-chain trading interface. Integrated Ethereum/ENS with ethers.js, viem, XMTP messaging, and wallet flows, using AI-native development tools to accelerate delivery.

ENS Ethereum Viem MetaMask WalletConnect ERC Standards Smart Contracts React Vite PostgreSQL Cursor Claude Code Bolt.New Windsurf

React Developer & Open Source

Freelance

Jan 2021 - Jan 2022 (1 year)

Built full-stack e-commerce frontends with React and contributed to open source projects to broaden engineering experience. Completed programming bootcamps to deepen knowledge of modern frameworks and production practices.

React Figma Bootstrap

Freelance JavaScript & UI Developer

Upwork & Fiverr

Jan 2020 - Jan 2022 (2 years)

Delivered responsive, mobile-first layouts for clients, including UI implementations aimed at improving user engagement. Built interactive frontends using Figma, JavaScript/Bootstrap, and supported Shopify e-commerce builds.

HTML CSS JavaScript Figma Shopify Bootstrap Responsive Design

Full Stack Developer

S.P. Madrid Law Firm

Jan 2024 - Present (2 years 6 months)

Contributed to full stack company platforms by solving technical problems and improving workflows. Used low-code tools alongside Node.js, Redis, and SQL for database and backend solutions.

Node SQL Redis Wappler

Front End Developer

Day 1 PH

Jan 2023 - Present (3 years 6 months)

Built a real estate platform focused on desktop and mobile responsiveness with a UI/UX emphasis. Contributed to user-facing improvements and related reporting work.

React UI UX

Education

Degrees, certifications, and relevant coursework

Self-Directed Web3 & Frontend Education

Professional Certificate & Web3/JavaScript Certifications, Front-End Development & Web3

2019 -

Completed the Meta Front End Developer Professional Certificate and multiple Web3 and JavaScript certifications through platforms such as Udemy, freeCodeCamp, Coursera, and Scrimba, with ongoing upskilling.

Rizal Technological University

Bachelor of Science (BS), Electronics Communication Engineering

2019 - 2023

Earned a BS in Electronics Communication Engineering, building strong foundations in advanced engineering mathematics applied to software engineering.