Gihan Saranga Siriwardhana

Maash

United States · Hybrid

• Lead Engineer

  July 2025 - Present

  • Building a financial platform that gives freelancers and businesses in emerging markets access to stable digital dollars and faster cross-border payments, starting with Sri Lanka.
  • Build and maintain the full frontend for both the retail mobile app and the business web platform.
  • Support other engineers through reviews and guidance on integrating 3rd party service providers, ensuring smooth and secure connectivity.
  • Integrate real-time monitoring tools that improve reliability and allow early detection of issues without compromising security.
  • Lead code reviews and product reviews, set engineering standards, and help drive alignment between technical decisions and product strategy.
  • Collaborate closely with product, UX, stakeholders, and users to ensure Maash continuously evolves into a tool that empowers people to manage and move money with confidence.

  SolanaWeb3ReactJSReact NativeTypeScriptAWSNon Custodial WalletsStable CoinsCross Border PaymentsReal Time Monitoring

Apium Innovations

• Delivered high-impact Web3 and blockchain initiatives with leading brands and companies.
• Positioned Apium's solutions at the forefront of Web3 gaming and financial innovation.

United Arab Emirates

• Principal Engineer

  March 2025 - July 2025

  • Spearheaded engineering for the Mocaverse project by Animoca Brands, including the staking platform and MOCA Coin token system, enabling seamless Web3 engagement for communities and gaming ecosystems.
  • Designed and delivered a B2B and B2C stable-coin wallet application on the Solana blockchain, supporting enterprise and consumer clients in asset management and secure transactions.
  • Led the architecture and full-stack implementation of a real-time gaming metrics platform that collected player data, mapped performance to reward triggers, and managed distribution via Web3 channels.
  • Defined the technical roadmap and aligned engineering deliverables with product and blockchain strategy.
  • Oversaw architecture, conducted code reviews, managed DevOps pipelines, and addressed security and compliance for wallet and token systems on Solana.
  • Mentored engineers and established practices for scalable real-time metric processing and token reward-distribution workflows.
  • Collaborated with product, UX, and business stakeholders to translate requirements into performant and secure blockchain systems.

  SolanaWeb3BlockchainTypeScriptReactNode.jsDevOps

Onramper

Amsterdam, North Holland, Netherlands

• Senior Software Engineer

  November 2022 - April 2025

  • Played a pivotal role in developing and scaling a leading fiat-to-crypto onramp aggregator. Platform supports 1,000+ cryptocurrencies, 130+ fiat currencies, and 120+ payment methods across 190+ countries, serving clients like Telegram, Coinbase, and Worldcoin.
  • Platform Development: Engineered high-availability systems and wallet integrations, enhancing transaction success rates and reducing user fees.
  • Unified Interface: Developed a seamless interface facilitating access to a vast array of cryptocurrencies and fiat currencies, improving user experience and conversion rates.
  • Tech Stack: AWS Lambda, DynamoDB, Node.js, React.js, and React Query to build scalable and efficient systems.
  • Global Reach: Contributed to expanding the platform's global coverage for numerous payment methods and currencies.
  • Deepened expertise in Web3 infrastructure, full-stack development, DevOps practices, and building secure, high-performance systems at scale.

  Distributed SystemsWalletsAWSReactNode.js

Sysco LABS Sri Lanka

Sri Lanka

• Senior Software Engineer

  August 2022 - November 2022

  • Developed the "Sysco Shop" web application for Fortune 500 company Sysco, allowing thousands of businesses to query millions of products and process billions of dollars in orders from a single application.
  • Part of the Ordering tribe as a full-stack developer, working end-to-end on key features.

  PostgreSQLDistributed SystemsGraphQLReactNode.jsKubernetes
• Software Engineer

  March 2021 - August 2022

  • Developed the "Sysco Shop" web application allowing thousands of businesses to query millions of products and process billions of dollars in orders.
  • Full-stack developer in the Ordering tribe, working end-to-end on key features.

  PostgreSQLGraphQLReactSpring Boot