Software EngineerLead EngineerFull-Stack DeveloperNext.js DeveloperRuby on Rails DeveloperWeb3 EngineerApp DeveloperCEO and FounderDecentralized ApplicationsEthereum DeveloperBlockchain EngineerWeb DevelopmentSublet PlatformProptech SolutionsHome-Rental AutomationCleanHero FounderEthereum RouletteBlockchain PaymentsMetaMask IntegrationProperty Listing PortalsNext.jsTailwind CSSTypeScriptHerokuGraphQLAlgolia AITwilio APIAWS Web ServicesPostgreSQLMongoDBReact.js

Gonzalo Franco

Software Engineer

6+ years of hands-on experience in full-cycle software / product engineering. Fluent in 4 human languages + 5 programming languages. VC-Backed founder. Analytical, ever-curious.

Industry Experience

Dec 2024 - Present
full-time

Front-End Engineer
Massachusetts State Government (via LCM Inc.)

Building and maintaining the official MA State Government portal serving 5.5M+ users, implementing government-grade infrastructure as part of an awesome 11-member dev team.

Participating in all Scrum ceremonies (daily standups, sprint planning, refinement, reviews, and retrospectives) to ensure effective team collaboration and project delivery.

Writing robust code and conducting thorough code reviews to ensure highest quality standards.

Integrating various vendor APIs and ensuring seamless data flow across government systems.

Implementing comprehensive testing strategies using Jest, Playwright, and E2E/Regression testing.

Collaborating with design team using Figma to implement pixel-perfect UI components.

Next.js 15NestJSJestPlaywrightStorybookTypeScriptPrismaTailwindDockerAWSFigmaE2E TestingRegression Testing
Jun 2025 - Jul 2025
fractional

Front-End Engineer
BusesForSale.com

Single-handedly migrated the largest buses marketplace in the world ($250K MRR) from legacy PHP to Next.js/NestJS architecture as a fractional engineer.

Dramatically improved performance and developer velocity through modern stack implementation.

Implemented Algolia-powered intelligent search with advanced filtering for optimal vehicle discovery.

Built sophisticated recommendation system to enhance user experience and increase conversion rates.

Integrated OpenAI API for automated vehicle descriptions and intelligent categorization.

Optimized database queries and implemented Redis caching for high-traffic marketplace operations.

Collaborated with design team using Figma to create intuitive and modern user interface.

Next.jsNestJSTypeScriptReactTailwindAlgoliaPostgreSQLRedisFigmaOpenAI
Aug 2024 - Dec 2024
full-time

Full-Stack Engineer
Momntum.ai

Built and deployed AI-powered chatbots automating salon bookings via WhatsApp and Instagram

Developed full-stack features using Rails, Stimulus, Docker, and Mailhog

Integrated ChatGPT and third-party APIs for messaging, scheduling, and client management

Delivered end-to-end automation workflows within an agile, Linear-managed environment

Focused on system reliability, performance, and seamless user experience across platforms

Ruby on RailsStimulusDockerMailhogChatGPT APIWhatsApp APIInstagram APILinear
Feb 2020 - June 2024
full-time

Founding Engineer
OpenBroker

Designed and delivered a GraphQL-based API with AI-powered property matching that powers 50+ real-estate websites.

Built intelligent front-end with Next.js, React, Tailwind and custom component library deployed on Heroku, Vercel & DigitalOcean.

Integrated OpenAI for automated property descriptions and market analysis, improving listing quality and engagement.

Implemented machine learning algorithms for personalized property recommendations based on user behavior.

Raised capital at €3.2M valuation led by Sherry Ventures.

Architected GraphQL & RESTful APIs enabling database-less property listing portals for strategic B2B integrations.

Led distributed Agile team through MVP to production, managing high-traffic marketplace with auto-scaling deployments.

Onboarded 300+ clients with zero-downtime deployment strategies and comprehensive API documentation.

Next.jsReactTailwindOpenAIOpenAI VisionGraphQLRuby on RailsStimulus JSPostgreSQLPostGISSidekiqAlgolia AIAWSMachine Learning
Jan 2018 - Jan 2020
full-time

Co-Founder, Tech PM
CleanHero

Headless proptech solution automating home-rental operations, scheduling cleaners on auto-pilot.

Managed product development for both iOS and web applications, ensuring seamless user experience and functionality.

Recruited, hired, and trained freelance full-stack engineers, fostering a skilled and efficient development team.

Achieved a successful exit demonstrating significant business impact & product scalability.

ReactSwiftXcodeRailsHerokuPostgreSQLSidekiqAirtable
2015 - 2019
full-time

CEO, Co-Founder
Supercharge Productions Inc.

Co-founded Supercharge Productions Ltd. and grew it from working in Brooklyn coffee shops to establishing a reputable advertising firm on 5th Avenue, managing million-dollar budgets.

Led the agency in brokering content collaborations between influencers and brands, overseeing product development, marketing, client strategy, and P&L.

Defined product and go-to-market strategies for clients, fostering innovative and complex client products/services to meet B2C and B2B demands.

Identified new business opportunities for clients, driving growth and diversification.

Hired and cultivated a team of 19 full-time employees, spanning roles from marketing managers to engineers.

Managed high-profile clients including Estée Lauder, Asos, Teva, Sephora, Amazon, FourSquare, Daniel Wellington, Furla, JetBlue, and others.

Influencer Management in 2015 was a completely different and much more elevated and profitable landscape than what it is today.

Achieved over $3 million USD in revenue throughout the company's lifespan before exiting in 2019.

Media BuyingPaid MediaOverseas ProductionBrand PartnershipsDealroom managementContent CreationProduction of Turn-key Experiences
Jul 2012 - Sept 2013
full-time

Ops Manager
NeueHouse

Worked with a $12M operating budget to oversee construction, installation, and opening processes.

Developed and executed programming events such as TED talks, performances, and summit gatherings.

Created a digital platform for member connections and enhanced NeueHouse’s digital presence.

Assisted in development & launch of NeueHouse locations in Hollywood and London.

Side Projects

Developed a decentralized & anonymous roulette application, enabling seamless Ethereum-based betting transactions through MetaMask integration. Built a secure backend using Express.js to manage user accounts, betting logic, and balance tracking. Utilized Web3.js and Alchemy to interact with ERC20 blockchain for deposit, bet placement, and payout processes. Deployed frontend on Vercel and backend on Heroku with zero-downtime deployment strategies. Implemented real-time data updates using Socket.IO and Web3.js, ensuring accurate tracking of user bets, balances, and gas fees.

🎰 Crypto Roulette (2024)
MongoDBExpress.jsNext.jsWeb3.jsReduxAlchemyEthereumMetaMaskSocket.IOVercelHeroku

Built sublet platform for New Yorkers traveling for a minimum of one month using Next.js, TypeScript, Tailwind, and Ruby on Rails. Enhanced platform with machine learning algorithms for personalized listing recommendations based on user preferences and behavior. Integrated Algolia AI search for intelligent listing discovery and Stripe for seamless payment processing. Deployed CI/CD pipelines with Heroku and Vercel for zero-downtime deployments and optimal performance. Integrated Blockchain.com Wallet API (Web3) to enhance payment security and provide seamless cryptocurrency transactions.

🗽 Sublet NY (2023)
Next.jsTypeScriptReactTailwindRuby on RailsAlgolia AIStripeWeb3HerokuDockerTwilioMachine Learning

I wrote a model that demonstrates Benford's Law. Benford's Law doesn't apply to data extracted from a specific range, as the maximum number in the dataset must be undetermined or infinite. For example, if a number generator extracts from a set range like 1-100, the first digit distribution will be uniform. However, when a computer or nature decides the range randomly each time, the dataset adheres to Benford's Law. I have written easy-to-understand code that proves that Benford's Law consistently holds true for randomly chosen numbers of randomly decided lengths.

🧮 Proving Benford's Law
RubyPythonSolidity

The Butterfly Effect is a concept in chaos theory that describes how small changes in initial conditions can lead to vastly different outcomes in complex systems. I wrote a simulation of the Lorenz System to demonstrate the Butterfly Effect. The Lorenz System is a set of differential equations that model atmospheric convection (basically how heat moves in the atmosphere) and exhibit chaotic behavior. I used the Runge-Kutta method to solve the equations numerically, which is a common technique for solving ordinary differential equations. The simulation shows how two trajectories with very very slightly different initial conditions diverge over time, illustrating the sensitivity to initial conditions. The output is visualized using Gnuplot, creating a plot that highlights the chaotic nature of the Lorenz Attractor.

🦋 The Lorenz System (Butterfly Effect)
RubyGnuplot

A WordPress plugin that allows major themes (like Elementor) to pull houses from the OpenBroker MLS API and create No-code Real Estate Websites.

🧩 WordPress Plugin
PHPGraphQLWordPress
NextUI hero Image

Even though I'm not actively seeking new opportunities right now, my inbox is always open. If you have a question or just want to say hello, I'll do my best to respond!

mailto:hey@gonzalofranco.com

coded with ♥