Founding Enginner

About Antai Ventures

Antai Ventures is a leading venture studio headquartered in Barcelona, with a strong presence across Southern Europe and Latin America. We team up with exceptional entrepreneurs to build disruptive, scalable companies from scratch. Since 2012, we've co-founded 30+ ventures, including Glovo, Wallapop, PlatanoMelon, and PiperAI. Collectively, our startups have raised over $1.5B in funding, generated $3B+ in shareholder value, and created 5,000+ jobs.

About Juryo

Juryo is building the agentic AI platform for small and mid-sized law firms, starting with high-volume B2C practices (extranjería, LSO, laboral, deudas, civil). Our voice and WhatsApp agents already qualify clients, generate documents, manage cases, and handle billing workflows, delivering over 2× improvement in lead conversion for our customers.

We've gone from idea to revenue in months:

• Multiple paying law firms onboarded
• Six-digit ARR
• Daily usage (+200 calls/WhatsApps) by real customers
• Clear PMF in a massive, fragmented €5B+ market (in Spain alone)

Now we're hiring our Founding Engineer. Someone relentless, hands-on, and hungry to build fast.

Why this role is special

• Founding seat in a high-velocity applied-AI startup
• Direct ownership of systems used daily by customers
• Greenfield architecture and freedom to shape the tech DNA
• Extreme autonomy, zero bureaucracy, and daily shipping
• Your work impacts revenue and customer experience immediately
• Opportunity to transform one of Europe's most underserved industries

If you want to build, not maintain, this is that kind of role.

What you'll do:
Build

• Architect and ship agentic workflows across voice, WhatsApp, and email
• Build RAG pipelines, automated document systems, and high-throughput data flows
• Ship full-stack features end-to-end

Scale

• Improve latency, reliability, and performance across the platform
• Harden infrastructure to support thousands of daily agent interactions
• Set up observability, monitoring, and deployment workflows

Own

• Work directly with legal teams and real users
• Turn ambiguous problems into shipped product in days
• Drive engineering culture, best practices, and early hiring principles
• Take full responsibility from idea design code deployment

What we're looking for:
Relentless executor

• You move fast, unblock yourself, and thrive in high-ownership environments
• You value speed and impact over perfect abstractions

Hands-on, end-to-end builder

• Strong engineering fundamentals across backend, APIs, and product integration
• Experience with LLMs, agents, or eagerness to learn extremely fast

High-agency and independent

• You don't wait for instructions, you find problems and fix them
• You act like an owner, not an employee

Product-driven

• You think in terms of user value, not features
• You enjoy deep immersion in real customer workflows
• You iterate based on data, calls, and real transcripts

Ambitious and mission-aligned

• You want your work to matter
• You want meaningful equity
• You want to help build a company from the ground up

What we offer:

• Competitive salary
• Meaningful equity with real upside
• A chance to build the AI backbone for legal services
• High-trust, high-autonomy environment
• Based in Barcelona, in-office culture with high collaboration
• Work on problems that touch thousands of people every week

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