Massimo is available for hire
Hire MassimoMassimo Cairo
Verified Expert in Engineering
Full-stack Web Developer
Vilnius, Vilnius County, Lithuania
Toptal member since November 22, 2021
Bio
Massimo wrote the first line of code at seven and won the first medal in an international programming competition at 16. He is currently a full-stack and web developer most fluent in React, although he has worked with a wide range of technologies in the past. He loves solving complex problems and, at the age of 30, he already has 20+ publications in algorithms and theoretical computer science. Massimo is also the founder and sole developer of DoYouNotes.com, a study tool for students.
Portfolio
TenderGlass
Agentic AI, AG Grid, AI Chatbots, React, Google Cloud Platform (GCP), Terraform...
Insightology.AI Ltd
Retrieval-augmented Generation (RAG), Large Language Models (LLMs)...
Humata (Tilda Technologies, Inc.)
PostgreSQL, TypeScript, Google Cloud Platform (GCP), React, SQL, Next.js...
Experience
- JavaScript - 7 years
- CSS - 5 years
- React - 5 years
- TypeScript - 5 years
- Back-end - 4 years
- Competitive Programming - 4 years
- HTML5 - 3 years
- Web - 3 years
Preferred Environment
Linux, Visual Studio Code (VS Code), React, TypeScript, Git, GitHub, JavaScript
The most amazing...
...project I've developed is DoYouNotes.com, a web-based app that lets students learn faster by adding and practicing questions directly on PDF notes.
Work Experience
Founder and Full-stack Developer
2025 - PRESENT
TenderGlass
- Developed a system that gathers information about public sector opportunities (tenders), processes attached files, and provides an advanced search functionality and AI assistance.
- Deployed all cloud resources on GCP using Terraform. This includes Cloud Storage Buckets, Cloud Run Jobs and Services, Cloud Scheduler Jobs, DNS zones, Docker repositories, Firebase resources including Firebase AI Logic, Vertex AI, Alerts, and more.
- Oversaw the product launch and the sales cycle, closing contracts with 15+ customers. Optimized the service for search engines (SEO). Monitored the service over time and optimized the running costs.
Technologies: Agentic AI, AG Grid, AI Chatbots, React, Google Cloud Platform (GCP), Terraform, Express.js, Serverless Architecture, APIs, Full-stack, Technical Leadership, CTO, Artificial Intelligence (AI), Large Language Models (LLMs), DevOps, Big Data, IT Security, Management, Agentic AI Systems, IT Infrastructure, Serverless Framework, System Design, Code Review, Leadership, Agentic Coding, Systems Design, Front-end Architecture, Claude Code, Unit Testing, Payment APIs, Claude, Vibe Coding, Payment Processing, Payments, Database Architecture, SQL, NoSQL, Data Warehousing, Cloud Architecture, Software Engineering, System Architecture, Security Architecture
AI Engineer
2025 - 2026
Insightology.AI Ltd
- Developed a web application that automates several Market Research tasks using AI.
- Set up a development process which allowed non-technical members of the team to contribute to the development of the product using AI, while maintaining high standards in terms of security, scalability, and code quality.
- Oversaw the launch of the product and monitored usage of the first customers.
Technologies: Retrieval-augmented Generation (RAG), Large Language Models (LLMs), Knowledge Graphs, TypeScript, Node.js, Machine Learning, Graph Databases, Python, Agentic RAG Systems, RAG Systems, Data Pipelines, RAG Architecture, Scalability, Serverless Architecture, Full-stack, Technical Leadership, CTO, Artificial Intelligence (AI), DevOps, Agentic AI Systems, IT Infrastructure, Vercel, Serverless Framework, System Design, Code Review, Multi-tenant Architecture, Leadership, Agentic Coding, Systems Design, Front-end Architecture, Claude Code, Amazon Web Services (AWS), Unit Testing, Claude, Vibe Coding, Database Architecture, NoSQL, Cloud Architecture, Software Engineering, System Architecture, Security Architecture
Full-stack Developer
2024 - 2025
Humata (Tilda Technologies, Inc.)
- Optimized the latency of the main API endpoint (2-3x speedup), improving the user experience of all users interacting with the company AI assistant.
- Implemented a new LLM back end for the company's AI assistant based on Gemini, supporting multimedial input and reasoning.
- Took ownership of several projects involving the implementation of new major features, performance optimizations, maintenance, monitoring, etc.
Technologies: PostgreSQL, TypeScript, Google Cloud Platform (GCP), React, SQL, Next.js, Supabase, Vercel, Python, OpenAI, Gemini API, Google Cloud, Vertex AI, OpenAI GPT-4 API, Figma to React, Back-end, Vite, Stripe, Security, Retrieval-augmented Generation (RAG), Natural Language Processing (NLP), Vector Search, AI Tools, Integration, Docker, AI Agents, Linux, Terraform, AI-generated Code, Artificial Intelligence (AI), Software Design, AI Integration, B2B, Consulting, AI Chatbots, JSON Web Tokens (JWT), Agentic AI, Vector Databases, OpenAI API, Semantic Search, CSV File Processing, Algorithm Design, Infrastructure, Agentic RAG Systems, Data Processing, RAG Systems, Data Pipelines, RAG Architecture, Scalability, Express.js, Serverless Architecture, APIs, Full-stack, Large Language Models (LLMs), Big Data, IT Security, Scaling, Agentic AI Systems, IT Infrastructure, Serverless Framework, System Design, Code Review, Multi-tenant Architecture, Agentic Coding, Systems Design, Front-end Architecture, Figma, Claude Code, FastAPI, Unit Testing, Payment APIs, Claude, Vibe Coding, Payment Processing, Payments, Database Architecture, Cloud Architecture, Software Engineering, System Architecture, Security Architecture, Technical Documentation
Founder
2024 - 2024
Polipo, MB
- Implemented an automated Figma-to-React conversion tool, including a Figma plugin and a TypeScript library.
- Published the Figma plugin and the related package. Maintained the systems in production.
- Managed collaborators, including one software developer and one designer.
Technologies: TypeScript, Figma, Figma to React, AG Grid, Vite, Stripe, Security, AI Tools, Integration, Docker, AI Agents, Linux, Terraform, Storybook, AI-generated Code, Software Design, B2B, Minimum Viable Product (MVP), JSON Web Tokens (JWT), Tailwind UI, Infrastructure, Full-stack, Technical Leadership, CTO, IT Infrastructure, eCommerce, eCommerce CMS, Leadership, Systems Design, Front-end Architecture, Database Architecture, Software Engineering
Front-end Developer
2023 - 2024
Non-Trivial Ventures
- Implemented a web-based application that provides interactive lessons, including the front end, back end, and database.
- Created and maintained a system to accept applications, screen candidates, and manage the selection process.
- Owned the maintenance for all the systems in production.
Technologies: JavaScript, CSS, Next.js, HTML, SVG Animation, TypeScript, MDX, Figma to React, AG Grid, Back-end, Vite, Integration, Storybook, Software Design, Minimum Viable Product (MVP), Consulting, CSV File Processing, Dashboards, Serverless Architecture, Serverless Framework, Code Review, Systems Design, Front-end Architecture, Figma, Database Architecture, NoSQL, Software Engineering
AI Researcher
2023 - 2024
Self-employed
- Created a generative AI for fonts from scratch, based on the Transformers architecture, using PyTorch.
- Developed the data transformation pipeline required to train the model efficiently on existing font files.
- Set up the infrastructure to train the model in the cloud, using GCP's Vertex AI custom training jobs.
Technologies: Artificial Intelligence (AI), PyTorch, Generative Pre-trained Transformers (GPT), Google Cloud Platform (GCP), Python, Cloud, Rust, Large Language Models (LLMs), Chatbots, ChatGPT, Git, AI Tools, Docker, AI Agents, Linux, Minimum Viable Product (MVP), CSV File Processing, Data Processing Automation, Algorithm Design, Data Processing, Software Engineering
Contractor
2023 - 2023
A Multinational Telco Group
- Designed and developed an AI-assisted editor, based on GPT-4 with vision capabilities, to be used internally to prepare requirement documents related to tagging website pages and app screens (MarTech).
- Integrated the OpenAI API with the back end, with support for streaming generated responses to the client and converting them into a structured format on the fly.
- Created a data pipeline to generate effective prompts using semi-structured internal company documents, free text prompts, and fully structured editor data.
- Implemented a front end using React, Chakra UI, and Firebase SDK.
Technologies: React, OpenAI, OpenAI GPT-3 API, OpenAI GPT-4 API, Tailwind CSS, Cloud, API Integration, Large Language Models (LLMs), Generative Pre-trained Transformers (GPT), Chatbots, ChatGPT, Git, TypeScript, UI Development, OAuth, Single Sign-on (SSO), DevOps, Back-end, Vite, Security, AI Tools, AI Agents, Docker, Artificial Intelligence (AI), Software Design, AI Integration, Minimum Viable Product (MVP), Consulting, AI Chatbots, OpenAI API, Tailwind UI, CSV File Processing, Dashboards, Infrastructure, Serverless Architecture, Serverless Framework, Unit Testing, NoSQL, Software Engineering
Founder and Full-stack Web Developer
2020 - 2023
DoYouNotes
- Designed, developed, and published a web-based app that allows students to add and practice questions on PDF files. The app is production-ready, scalable, mobile-ready, cloud-synchronized, and offline-ready.
- Implemented a pixel-perfect web-based UI with mobile-native look-and-feel, responsive layouts, custom-tailored components and animations, drag-and-drop integration, high performance, and PWA support.
- Mastered advanced HTML5, CSS3, and modern web APIs such as Service Workers, IndexedDB, Canvas elements, Web Workers, Cache API, multi-touch events, drag-and-drop events, DOM manipulation, programmatic animations, History API, and more.
- Improved the app over time by collecting and analyzing usage data, both as analytics and session recordings. Tracked and optimized acquisition, onboarding conversion rate, activations, and retention rates.
- Prepared marketing material and marketed the app via video ads and other channels. Set up payments in the app and user-to-user referrals.
Technologies: TypeScript, React, Web, HTML5, Stripe, PWA, Progressive Web Applications (PWAs), Stripe Checkout, Architecture, Web Development, Responsive Web Design (RWD), User Experience (UX), Full-stack, CI/CD Pipelines, React Redux, Performance, WebSockets, Amazon Web Services (AWS), Android, Android SDK, iOS, iOS SDK, Web Accessibility, User Interface (UI), SVG Animation, MDX, Jest, Search Engine Optimization (SEO), Front-end, Microservices, Databases, Technical Leadership, Google Cloud Platform (GCP), Google Cloud, CTO, Leadership, ECMAScript (ES6), SVG, Early-stage Startups, Software Architecture, Full-stack Development, Database Design, Next.js, Redux, Data Analytics, PDF, Front-end Development, Back-end Development, Cloud Infrastructure, Project Management, Firebase, Firebase Cloud Messaging (FCM), SaaS, Node.js, UI Components, Design Systems, Chrome Extensions, Technical Architecture, UX Design, Stripe API, Vercel, Prisma, Solution Architecture, Cloud, API Integration, SDKs, SDK Development, Authentication, Monorepos, Startups, Mobile Development, Mobile Apps, B2C, GraphQL, Vue, Git, UI Design, UI Development, Back-end, Security, Docker, Linux, Software Design, Minimum Viable Product (MVP), Infrastructure, Scalability, Express.js, IT Infrastructure, Serverless Framework, System Design, Systems Design, Front-end Architecture, Unit Testing, Payment APIs, Payment Processing, Payments, Database Architecture, NoSQL, Software Engineering, System Architecture, Security Architecture
Web Developer
2021 - 2022
TaHo
- Developed the main company website from scratch using React and CSS-in-JS, with responsive and custom layouts, starting from the designs provided in Figma.
- Contributed to the development of the core product of the company, an open-source cryptocurrency wallet living in a web extension, integrating with the team and its processes.
- Analyzed and fixed bugs in a web (multi-browser) extension. Identified and mitigated performance issues, implemented new screens, refactored and improved the source code quality, and participated in code reviews.
Technologies: React, HTML, JavaScript, CSS, Gatsby, Web Extensions, React Redux, Redux, API Integration, Web3, Blockchain, MetaMask, Cryptocurrency, Git, User Interface (UI), TypeScript, UI Development, Vite, Security, Integration, Consulting, Scalability, Software Engineering
Front-end Developer | Contractor
2020 - 2020
Geckosoft
- Developed a web-based PDF viewer with custom functionality using Angular and PDF.js and integrated it into a complex web application.
- Contributed to designing a custom blockchain implementation similar in functionality to Amazon Quantum Ledger Database (QLDB).
- Optimized the web-based PDF viewer's performance on large PDFs by using browser profiling tools and reducing the Angular-related overhead.
- Collaborated with a team of around ten people, following their best practices regarding agile development, code quality, and code reviews.
Technologies: Angular, Web, REST, REST APIs, Web Development, Responsive Web Design (RWD), User Interface (UI), User Experience (UX), CI/CD Pipelines, Automated Testing, Performance, Cypress, Front-end, AngularJS, Microservices, ECMAScript (ES6), PDF, Front-end Development, Node.js, UI Components, Solution Architecture, API Integration, Technical Writing, Blockchain, Git, TypeScript, UI Development, DevOps, Security, Integration, Consulting, Code Review, Front-end Architecture, Database Architecture, Software Engineering
Machine Learning Engineer | Data Scientist | Software Engineer
2018 - 2020
BioBeats (Merged into Huma Therapeutics)
- Developed machine learning-based algorithms to process physiological signals in public datasets, such as ECG signal shape analysis and correlation with other physiological factors.
- Designed algorithms to process real-time data from smartphone and wearable sensors—for instance, to detect heart and respiration rate from motion sensors—and implemented them as part of mobile apps.
- Contributed to designing and developing an internal framework for the cross-platform implementation of data-processing algorithms in native Android and iOS apps.
Technologies: TensorFlow, Pandas, React Native, TypeScript, REST, REST APIs, APIs, Architecture, Mobile, CI/CD Pipelines, Performance, Android, Android SDK, iOS, iOS SDK, MySQL, MongoDB, Amazon Web Services (AWS), Microservices, Databases, Google Cloud Platform (GCP), Google Cloud, Data Engineering, ECMAScript (ES6), Machine Learning, Dynamic Programming, Python, Software Architecture, Full-stack Development, Data Architecture, Data Analytics, AI Programming, Back-end Development, Technical Architecture, Cloud, API Integration, SDKs, SDK Development, Technical Writing, Monorepos, Healthcare, Mobile Development, Mobile Apps, B2C, Large Language Models (LLMs), Git, DevOps, Docker, Linux, Minimum Viable Product (MVP), CSV File Processing, Dashboards, Data Processing Automation, Algorithm Design, Data Processing, Data Pipelines, Serverless Architecture, IT Infrastructure, System Design, Code Review, Systems Design, Unit Testing, Amazon API Gateway, AWS Lambda, Database Architecture, SQL, Data Warehousing, Software Engineering, System Architecture, Security Architecture, Technical Documentation, Azure
Chief Back-end Engineer | Co-founder
2012 - 2014
Kiwi S.r.l. (defunct)
- Designed and developed REST APIs for our mobile apps, which tracked user location and allowed users to share content with other users nearby.
- Implemented an efficient spatial index for querying user locations on top of a non-spatial cloud database.
- Managed up to three back-end developers and oversaw the mobile front-end development regarding their integration with the back-end APIs.
Technologies: Java, Google App Engine, REST, REST APIs, Location Tracking, APIs, Architecture, Full-stack, CI/CD Pipelines, Databases, Technical Leadership, Google Cloud Platform (GCP), Google Cloud, CTO, Leadership, Test-driven Development (TDD), Early-stage Startups, Software Architecture, Full-stack Development, Database Design, Data Analytics, Back-end Development, Cloud Infrastructure, Project Management, Technical Architecture, PostgreSQL, Solution Architecture, Cloud, Mobile Development, Mobile Apps, B2C, Git, UI Development, DevOps, Back-end, Security, Integration, Linux, Minimum Viable Product (MVP), Infrastructure, Serverless Architecture, IT Infrastructure, System Design, Code Review, Systems Design, Unit Testing, AWS Lambda, C++, Database Architecture, SQL, Cloud Architecture, Software Engineering, System Architecture, Security Architecture, Technical Documentation
Experience
Polipo - Figma Compiler
https://polipo.ioA Figma plugin and a TypeScript library that allow rendering Figma designs from a React application, supporting responsiveness, dynamic content, interactivity, real-time updates, and low-overhead production builds.
Figma layouts are automatically converted to an intermediate (JSON-based) representation with the addition of CSS. The intermediate representation is then rendered from React, allowing the use of custom tags and components, replacing content, and attaching event listeners to individual elements.
Figma layouts are automatically converted to an intermediate (JSON-based) representation with the addition of CSS. The intermediate representation is then rendered from React, allowing the use of custom tags and components, replacing content, and attaching event listeners to individual elements.
DoYouNotes
https://doyounotes.comA web-based app that allows students to add and practice questions on PDF notes.
I designed, developed, and published the app unassisted, including UI/UX design, copywriting, responsive front-end UI implementation, and offline-ready cloud synchronization.
I designed, developed, and published the app unassisted, including UI/UX design, copywriting, responsive front-end UI implementation, and offline-ready cloud synchronization.
International Olympiad in Informatics | Awards and Current National Committee Membership
https://ioinformatics.org/The International Olympiad in Informatics (IOI) is the world's most prestigious computer science competition toward secondary school students sponsored by UNESCO and IFIP.
In 2007, I was the youngest participant and the youngest first-place winner ever of the Italian national olympiad. I won national first place two more times and made it to the national team four times, winning three international silver and one bronze medal.
I am currently a member of the Italian technical and scientific committee, contributing to designing and implementing problems for the national edition and selecting the national team.
In 2007, I was the youngest participant and the youngest first-place winner ever of the Italian national olympiad. I won national first place two more times and made it to the national team four times, winning three international silver and one bronze medal.
I am currently a member of the Italian technical and scientific committee, contributing to designing and implementing problems for the national edition and selecting the national team.
Education
2015 - 2019
PhD in Mathematics
University of Trento - Trento, Italy
2013 - 2015
Master's Degree in Computer Science
University of Pisa - Pisa, Italy
2010 - 2015
Complementary Masters' Diploma in Mathematics and Computer Science (Full Scholarship)
Scuola Normale Superiore - Pisa, Italy
2010 - 2013
Bachelor's Degree in Computer Science
University of Pisa - Pisa, Italy
Skills
Libraries/APIs
React, Node.js, REST APIs, Vue, AG Grid, Stripe, Stripe API, OpenAI API, TensorFlow, Pandas, React Redux, PyTorch
Tools
Git, Algorithm Design, React Apollo, Firebase Cloud Messaging (FCM), ChatGPT, Figma, Terraform, Claude Code, Claude, Sequelize, Stripe Checkout, GitHub, Prisma, MetaMask
Languages
TypeScript, CSS, JavaScript, GraphQL, HTML, ECMAScript (ES6), Python, HTML5, SQL, C++, Java, Python 3, MDX, Rust, C
Frameworks
Next.js, Express.js, Android SDK, JSON Web Tokens (JWT), Serverless Framework, React Native, Angular, iOS SDK, Jest, AngularJS, Tailwind CSS, Cypress, Redux
Paradigms
Responsive Web Design (RWD), Dynamic Programming, Database Design, B2C, DevOps, Serverless Architecture, Unit Testing, REST, Automated Testing, Microservices, Test-driven Development (TDD), Linear Programming, Mobile Development, B2B, Search Engine Optimization (SEO), UX Design, UI Design, Management
Platforms
Web, Firebase, Docker, Android, Amazon Web Services (AWS), Google Cloud Platform (GCP), Vercel, Linux, Mobile, iOS, AWS Lambda, Visual Studio Code (VS Code), Google App Engine, Blockchain, Vertex AI, Azure
Storage
Google Cloud, Data Pipelines, Database Architecture, NoSQL, Cloud Firestore, Databases, PostgreSQL, MySQL, MongoDB, Graph Databases
Industry Expertise
Project Management, Healthcare
Other
Algorithms, Back-end, Competitive Programming, APIs, Architecture, Web Development, Full-stack, Performance, Front-end, Technical Leadership, CTO, Leadership, Machine Learning, Optimization, Early-stage Startups, Software Architecture, Full-stack Development, AI Programming, PDF, Front-end Development, Back-end Development, SaaS, UI Components, Technical Architecture, Artificial Intelligence (AI), Solution Architecture, Cloud, API Integration, SDKs, SDK Development, Startups, Large Language Models (LLMs), Chatbots, UI Development, Figma to React, Retrieval-augmented Generation (RAG), AI Tools, Integration, Software Design, AI Integration, Minimum Viable Product (MVP), CSV File Processing, Infrastructure, Data Processing, Scalability, IT Infrastructure, System Design, Code Review, Front-end Architecture, Cloud Architecture, Software Engineering, System Architecture, Apollo Server, Programming Language Design, User Experience (UX), CI/CD Pipelines, User Interface (UI), SVG Animation, Data Engineering, Programming Languages, SVG, Data Architecture, Search Algorithm Design, Data Analytics, Cloud Infrastructure, Design Systems, OpenAI, Authentication, Technical Writing, WebAssembly (Wasm), Mobile Apps, OAuth, Single Sign-on (SSO), Supabase, Vite, Security, Natural Language Processing (NLP), Vector Search, AI Agents, AI-generated Code, Consulting, AI Chatbots, Agentic AI, Vector Databases, Semantic Search, Tailwind UI, Dashboards, Data Processing Automation, Agentic RAG Systems, RAG Systems, RAG Architecture, Big Data, IT Security, Agentic AI Systems, Multi-tenant Architecture, eCommerce, eCommerce CMS, Agentic Coding, Systems Design, FastAPI, Amazon API Gateway, Payment APIs, Vibe Coding, Payment Processing, Payments, Data Warehousing, Security Architecture, Technical Documentation, Complexity Theory, Location Tracking, Mathematics, Data Structures, PWA, Progressive Web Applications (PWAs), WebSockets, Web Accessibility, Chrome Extensions, Gatsby, Web Extensions, Generative Pre-trained Transformers (GPT), OpenAI GPT-3 API, OpenAI GPT-4 API, Web3, Monorepos, Poker, Cryptocurrency, Gemini API, Storybook, Knowledge Graphs, Scaling
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