Aug 2023 – Apr 2025 · 1 yr 8 mos · Argentina · Remote

• At xLabs, I spearhead the design and implementation of robust backend services and open-source libraries for custom relayers. My work has given me a comprehensive understanding of various wormhole protocols and the dynamics of multiple blockchain interactions, including engagement with smart contracts.
• Custom Relayers Development: Successfully developed multiple custom relayers for wormhole protocols from the ground up, facilitating interactions with smart contracts, SDKs, blockchains, and relay tokens while effectively transmitting wormhole messages across different chains.
• Wallet Manager Package: Created a comprehensive wallet manager package that encompasses rebalancing, logging, monitoring, broadcasting, and transaction landing across multiple blockchains supported by a wormhole. (https://www.npmjs.com/package/@xlabs-xyz/wallet-monitor)
• Oracle Assistant: Developed an Oracle service to update smart contracts with real-time gas prices, token prices, and relayer fees, ensuring timely and accurate data availability.
• Solana Broadcasting: Improved landing rates on the Solana blockchain by implementing broadcasting strategies and dynamic priority fee support through Helius and Jito, dynamically switching between them based on success rates.
• Relayer SLAs: Enhanced relayer SLAs, maintaining a 99th percentile response time below 60 seconds by implementing a repricing transaction strategy across EVM chains.
• Integration Testing: Set up Hardhat for integration testing across multiple relayers, significantly improving code coverage and robustness of our solutions.
• Performance Monitoring: Implemented monitoring solutions using Prometheus and Grafana to visualize relay metrics and performance, facilitating data-driven decision-making and system optimization.

Nov 2022 – Jul 2023 · 8 mos · Remote

• Building #1 Web3 community growth platform as Tech lead/founding engineer.
• Tech Stack: NextJS, React query, Firebase Auth, web3.js, ethers.js, firestore, MySQL with Prisma, TRPC node, cloud run, cloud functions, google cloud scheduler, google task queues
• Worked on setting up mono-repo at Qwestive with CICD pipelines with feature flag support for continuous delivery and A/B testing.
• Built Web3 Referral web app from scratch
• Implemented complete off-chain tracking for Qwestive with work spanning across frontend and backend and DevOps.
• Built fast, secure, and small typescript SDK for our customers for onboarding new users(invitees) on their DApps, relaying user data to our backend serverless functions
• Setup Tenderly web3 actions to extend on-chain tracking support to all the chains
• Built embeddable UI widget for customers to leverage referral tracking right in their own DApps
• Added support for multi-token, dynamic rewards with a time limit in the Qwestive backend
• Optimized ETL pipeline with pre-aggregated metrics over conversion, revenue, and rewards
• Responsibilities:
• Designing architecture and technical design documentation
• Maintaining developer documentation in gitbook
• Worked on setting up engineering processes and JIRA automation
• Looping-in customer feedback and iterating on the product

Jun 2022 – Nov 2022 · 5 mos

• Worked as a Senior Software Engineer (Full Stack), I contributed toward bringing more value to the product and the team.
• OpenBracket(openbracket.net)
• Worked on implementing remote code execution from scratch using Ignite(AWS firecracker) running code in isolation on microVMs.
• Was able to reduce the microVM image size by more than 50% to allow the creation of multiple microVMs on a single compute engine instance.
• Dory
• Worked on refactoring and optimizing app performance, where I reduced the dashboard's initial loading and observed an increase in lighthouse performance score by 54%.
• Introduced pricing/subscription plans in Dory, got our first few paid customers within a month after the launch
• Worked on optimizing the live attendees feature where I successfully brought down the overall monthly cost on GCP by more than 50%.
• Worked on implementing Firebase auth utility in Playwright to automate tests with reusable simulated login, which reduced the total time to run all test cases in CI by 60%.

Aug 2021 – Jun 2022 · 10 mos

• Dory (dory.app)
• Migrated from legacy backend using GraphQL, Node, Postgres, and Redis to Firebase, Firestore, and Cloud functions resulting in blazing fast web application.
• Worked on optimizations, creating Engineering design documents, and revamping UI modules.
• Worked on setting up Testing-infra with Playwright for e2e tests, and Storybook for unit tests and integrated with CI.
• Patient 360 App (Silicon Valley startup)
• Worked as an individual contributor where I was responsible for building the Next app from scratch.
• Implemented CICD pipeline with Docker and Github actions.
• Built UI component library with component-driven architecture, that was used within the next application
• Utilised Storybook to visualize and validate UI components

Oct 2020 – Aug 2021 · 10 mos

• Worked as a Full Stack developer. Contributed my part in developing an AI-powered web application.
• Tech Stack: VueJs/Vuex, highcharts.js, element.ui, koa.js, sequelize, druid.io, AWS S3, kafka-node, pubnub.
• (1) Implemented micro-frontend using embedded iframes, Web Page optimizations, etc.
• (2) Implemented AWS temporary credentials flow for AWS S3 resources.
• (3) Session Management, file upload, and security enhancements in Web Chat Plugin.
• (4) Embeddable UI as an extension in Web Chat Plugin.
• (4) Training and mentoring junior developers.

Jan 2019 – Sep 2020 · 1 yr 8 mos

• (1) Owned and developed various front-end modules from scratch where it required high performance.
• (2) Built end-to-end Web Chat Plugin with Dynamic and Configurable UI from scratch using Vue.js/Vuex, Node.js, AWS S3, AWS Cloudfront, and Pubnub.
• (3) Utilized Highcharts.js to show Data Analytics for a diverse set of KPIs in the frontend and Druid queries in the backend.
• (4) Build Analytics report service in Node.js where it can generate and email the report in excel format to end-user for all the KPIs.
• (5) Integrated Segment.io for Tracking Detailed User Events in Web Application.
• (6) Improved AWS S3 upload flow in Node.js to maintain folder structure according to different Frontend modules and requirements.

Jun 2018 – Nov 2018 · 5 mos · Bengaluru, Karnataka, India

• Worked as individual contributor to React Web application from scratch. Researched Architectural designing, microservices architecture, db designing for large scale enterprise application.
• Tech Used: HTML/CSS, React with Redux, JavaScript, jQuery, etc.
• Highlights:
• (1) Developed all the UI components without using any custom library.
• (2) Designed and developed signup/login, otp module, job creation and invitation module, etc.
• (3) Integrated Google maps API like autosearch complete, maps, etc.

Jul 2017 – Jun 2018 · 11 mos · Delhi Area, India

• Worked as an Intern where I published 37 articles on geeksforgeeks portal.
• Most of the posts are related to DS, ALGO, Problem solving, ANN, data mining, image processing, etc.
• Here is link to my published articles:
• https://auth.geeksforgeeks.org/user/Abhishek%20rajput/articles