Rael Calitro
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Independent fullstack developer · SaaS · AI agents

Hi, I'm Rael Calitro

I make AI agents work in your team, reliably.

A developer since 2019, I deliver SaaS products end to end. Today I set up AI-agent-driven development in teams, from ticket to merge: repository instructions, skills, review, reliable CI and tests, under human supervision.

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Portrait of Rael Calitro

7 years

of software development

×6

estimated delivery speed of a team driven by AI agents, compared with a conventional team

SaaS

cybersecurity product, built as the sole developer

Ynov

teaching Master's classes since 2022

Areas

AI agents
Claude Code
Codex
Generative AI
RAG
TypeScript
React
Node.js
.NET
CI & tests
TDD
DDD
Teaching
French
English

01 /Services

What I do for you

My flagship offer first, then what I build every day for my clients. Time and materials, remote.

01

AI-agent-driven development

A ticket-to-merge process where agents implement, review and test, under technical and product supervision.

Assessment, repository instructions, skills, MCP servers, an AI reviewer, human acceptance testing and merge rules, then team coaching and measured results: share of PRs produced by agents, flaky tests, ticket-to-merge time.

02

Reliable CI and tests

Without a reliable CI, agents cannot move on their own: flaky-test quarantine and tracking, E2E tests refocused on user journeys, blocking checks.

03

End-to-end SaaS

Complete products, from the frontend to the database, all the way to production: TypeScript, React, Next.js, NestJS, .NET.

04

AI in your products

Assistants grounded in your data, RAG, business agents, several LLM providers with automatic fallback, cost tracking.

05

Custom models

Training, fine-tuning and deployment of models: computer vision, classification, segmentation, regression.

06

Teaching & training

Master's courses: AI-agent-driven development, AI integration, fullstack web development, software testing.

Corporate training on AI-assisted development and on integrating AI solutions.

02 /Experience

A chain of experiences

Each block builds on the previous one, from my first machine learning model to today's missions.

  1. Block #06
    Since January 2026

    Deltarm

    Senior fullstack developer · AI agents

    In a team of six developers, I build a governance, risk and compliance (GRC) platform for CAC 40 groups: risk register, internal control, action plans, data collection, reporting and mapping.

    The team openly uses AI intensively: for each ticket, agents implement, review and test all the way to delivery, under technical and product supervision. In six months, it delivered what a conventional team of the same size would have needed more than three years to build (a conservative estimate, based on the features delivered), without cutting corners on tests.

    I contribute to:

    • CI reliability: flaky-test quarantine and tracking, E2E tests refocused on user journeys;
    • the agents' skills: PR review, fixing review findings, hunting flaky tests;
    • the agents' working rules: review by an AI, human acceptance testing, no auto-merge;
    • business features: mapping, data collection, internal control, action plans, reporting.
    TypeScript
    NestJS
    React
    PostgreSQL
    Playwright
    Claude Code
    Codex
    GitHub Actions
  2. Block #05
    Since March 2025

    SecOps Forces

    Fullstack developer · sole developer of the application

    I build the SaaS platform of SecOps Forces, which protects SMEs and mid-size companies: email and domain security (DMARC, SPF, DKIM, leaked credentials, certificates), phishing and awareness campaigns, monitoring of vulnerabilities and lookalike domains, and continuous Microsoft 365 audits against the CIS and CISA benchmarks.

    I added an AI assistant, based on Mistral, that answers from each organisation's security data.

    On the build side:

    • front office and back office in React, a multi-tenant .NET API, Stripe billing;
    • more than 3,000 automated tests, from unit tests to Playwright user journeys;
    • AI-agent-assisted development, with project-specific conventions and skills.
    React
    TypeScript
    .NET
    SQL Server
    MongoDB
    Azure
    Mistral AI
    Playwright
  3. Block #04
    May to October 2025

    DeepDetective

    Fullstack & AI developer

    For an investigation board game with a companion app, I designed the AI that lets players talk with the characters: interrogations become real conversations, and the game comes alive.

    As the sole developer, I also took over and hardened the existing app: data security, player progress, performance.

    On the AI side:

    • it replaces a third-party chatbot service;
    • it queries several LLM providers, with automatic fallback;
    • it draws on the scenario through RAG, and streams its answers;
    • the game's writers author the characters in Notion, and they are synced automatically.
    React
    Next.js
    TypeScript
    Firebase
    Supabase
    pgvector
    OpenAI
    Gemini
  4. Block #03
    Since October 2022

    Ynov Campus · IPSSI

    Master's teacher

    Passing on knowledge has always driven me. I have taught at Ynov Campus Sophia-Antipolis since 2022, and I taught at IPSSI in 2025, in computer science Master's classes: AI-agent-driven development, AI integration, fullstack web development, software testing, algorithms and Web3.

    AI agents
    Web development
    Software testing
    Teaching
  5. Block #02
    October 2022 to September 2024 · Paris

    Smart-Chain

    Fullstack developer, Web3 & AI

    A Paris startup in the blockchain and artificial intelligence space, where I developed several products, including one for the French Alternative Energies and Atomic Energy Commission (CEA), among other prestigious projects.

    Fullstack developer on a cloud infrastructure, mainly using NodeJS, TypeScript, React, Next, Prisma, PostgreSQL, WebSocket, and queuing, to build web applications interacting with:

    • blockchains: smart contract calls, indexing, IPFS;
    • AI models I developed in-house in computer vision (CNN, GAN, ViTransformers) and on tabular data (RNN, LSTM): classification, detection, segmentation, and regression;
    • LLMs such as those from OpenAI and more recently Mistral AI: assistants, prompting, fine-tuning, and RAG.
    NodeJS
    TypeScript
    React
    Next.js
    Prisma
    PostgreSQL
    WebSocket
    Kanban
    Scrum
  6. Block #01
    2 years

    Ricardo

    Frontend, then backend developer

    I worked on the first marketplace in Switzerland, in an English-speaking company.

    One year as a frontend developer with React hooks and TypeScript based on hydration, using Material-UI, React-Query, and Redux.

    Then one year as a backend developer with Java Spring, .NET, Kafka, PostgreSQL, and SQL Server, on a Kubernetes infrastructure managing our microservices, with Scrum.

    I also improved my English through daily interactions with my English-speaking colleagues and various presentations.

    React
    TypeScript
    Redux
    Java Spring
    .NET
    Kafka
    Kubernetes
    Scrum
  7. Genesis block · #00
    1 year

    Infotel

    Java & machine learning developer

    I designed desktop software in Java with a machine learning component, used to retrieve metadata from patent documents of the European Patent Office with the CRF (Conditional Random Fields) method.

    I also honed my skills in software architecture through object-oriented programming and many pair-programming sessions with my mentor.

    Java
    Machine learning
    CRF
    OOP

03 /About

Today, independence

I have been able to grow professionally in various environments, from established companies to startups, as well as in teaching.

I have met many brilliant minds, worked with a wide range of technologies, followed various work methodologies, and adapted to different work paces.

I have immersed myself in, analyzed, and differentiated various practices with a critical perspective, allowing me to better understand their advantages and drawbacks and thus grasp professional challenges.

Independent since October 2024, I deliver SaaS products end to end and help teams make AI agents work reliably: the agents write, review and test the code, and I make sure that work stays safe, maintainable and supervised. Alongside, I keep teaching.

Education

I undertook advanced studies in software development to enhance and certify the skills I acquired as a self-taught developer, obtaining my Master's degree in software development with honors.

During this course at Simplon, Campus ID, and Sophia Ynov Campus, I specialized in web development, software testing, software architecture, artificial intelligence, and blockchain.

04 /Beyond code

My free time? Between good times and technology watch

I am quite a bon vivant: I love my family, outings with friends, traveling, music, sports, reading, video games, series, and movies, like many people.

But my old habits often catch up with me, as I am also passionate about technology watch, research, and developing personal projects.

That is why you will find projects and articles on this site. I spared you the drafts, which I can't even count (my GitHub is a testament to this): I love to explore, optimize, create, share, and learn.

I am sensitive to software architecture and the art of building sustainable, elegant, and efficient solutions for the future.

Resilience, flexibility, maintainability, security, and optimization, balanced with the compromises of production, time, and money, as well as understanding their stakes, guide my professional daily life and conscience.

I have a particular fondness for artificial intelligence and all the work that revolves around it.

Philosophy

“Learn, experiment, contribute, help, and feel; whether you fail or succeed, it will serve one day or another, both technically and humanly.”
— Rael Calitro

Contact

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