One Month. Weekly Pushes. Real Traction.

SundAI and AI Tinkerers are joining forces for the WELTARE Spring Sprint—a recurring series of high-intensity building days every Sunday in April. This is the Startup Track for the most ambitious AI developers in Paris to bridge the gap between experimental code and venture-ready products.

We have dropped the “-athon” because this event focuses on 100% cooperation, real-time collaboration, and hands-on learning. We are building a high-signal environment for practitioners to ship weekly updates, gain real users, and prepare for fundraising this summer.

The April Sprint Goals

This series is designed for builders who live to write code and hack on messy experiments. Whether you are optimizing a mid-thought steering capability in a custom LLM or orchestrating autonomous agents using the OpenClaw framework, the focus is on growth and technical discovery.

• Weekly Cadence: Every Sunday from 10am to 6pm.
• Growth Focus: Pushing updates to gain real users and traction.
• No Fluff: No slides. No pitch decks. Just the code and the “how-to” behind your build.

Event Details

• Dates: Every Sunday in April (Current session: April 26th, 2026)
• Time: 10:00 AM – 6:00 PM
• Location: Schoolab Saint Lazare, Paris (Exact details shared with accepted participants)
• Capacity: 20 active builders

🗓️ Schedule

April 26, 2026 (Sunday)

Participation Rules

• Apply with your team: If you are solo, you can find co-founders via our networking tools.
• On-site requirement: At least one teammate must be physically present in Paris.

Event photos

AI Tinkerers - Paris

AI Tinkerers - Paris

AI Tinkerers - Paris

AI Tinkerers - Paris

AI Tinkerers - Paris

AI Tinkerers - Paris

Who Should Attend

This event is strictly for active engineers, researchers, and technical founders. We screen all registrations based on demonstrable technical work (GitHub, LinkedIn, or technical portfolios) to ensure every person in the room can “pop the hood” and contribute to deep-dive discussions on model inference, tool-calling, and agentic loops.

Partner

SundAI is a 501(c)(3) non-profit organization dedicated to empowering the next generation of AI-first innovators. By focusing on rapid prototyping and community-driven learning, they provide a platform for builders to turn ambitious ideas into functional AI applications. SundAI fosters a collaborative environment where developers and creators can access the resources needed to navigate the evolving artificial intelligence landscape.

AI Tinkerers Paris Stats

• Attendees: This premier community of 4,133 subscribers comprises elite AI engineers, researchers, and technical founders. Over 70% of members specialize in generative AI, LLMs, and agentic workflows, while 62% possess robust MLOps and software engineering capabilities. Notably, the group features pioneers from Hugging Face and top-tier institutions, driving real-world deployments and advanced multimodal AI innovations.
• Companies Represented: Featuring tech giants like Google, Meta, Microsoft, and Amazon, leading AI innovators such as Hugging Face, Mistral AI, Black Forest Labs, and ElevenLabs, alongside rising startups like LangWatch, Chainlit, ZenML, Quack AI, and more
• Demos: Across 130 demos submitted, 83 have been accepted and presented. The most engaging themes have focused on agentic AI production workflows, knowledge graph–driven grounding (GraphRAG/context graphs), and structured outputs that reduce ambiguity. Technical attention has also frequently covered reliability/cost optimization, tool and interface integration (including real-time access and voice/UI flows), plus evaluation and benchmarking methods, with additional interest in multimodal generation and on-device or serverless execution.
• Testimonials:

  “Excellent technical depth. The Temporal Fusion Transformer approach to futures microstructure was compelling, especially the idea of learning regime, feature relevance, and lookback decisions dynamically.”

  — AI consultant, NLP on June 04, 2026

  “Great talk. The inflation decomposition angle made the ML work feel practical, and the link from alternative data to tradable macro strategies gave builders a clear end-to-end workflow to study.”

  — AI consultant, NLP on June 04, 2026

  “Loved the demo aspect and the mix of technologies...”

  — AI consultant, NLP on May 22, 2026

  “Very practical session. The research-to-portfolio perspective, especially around macro data, ML decision inputs, Ex Machina, and internal LLM/agent usage, gave builders a real operating view.”

  — AI consultant, NLP on June 04, 2026

  “Useful and grounded demo. The focus on advisor efficiency, portfolio review preparation, client engagement, and confidentiality guardrails made the AI workflow feel production-ready.”

  — AI consultant, NLP on June 04, 2026

  “Overall, it was high-quality content and it made me want to come back for the next ones!”

  — Product manager, AI community on March 26, 2026

  “Strong closing panel. The production versus proof-of-concept framing kept the AI agents conversation grounded, especially across bank, private-banking, quant, and infrastructure perspectives.”

  — AI consultant, NLP on June 04, 2026

Sponsor the builders shaping what’s next