AI Software Engineer (senior/staff level)
Joko · Remote · Paris · Barcelona ·
COMPENSATION
€76k – €175k
Listed on the employer's job board (Ashby)
- Senior/Staff level
- Remote (France/Spain)
- AI & LLM focus
- Equity included
- Global travel allowed
Join Joko's Engineering team to develop Juno, an AI agent that helps users find the best products and prices. You will work at the intersection of applied research and production, collaborating closely with product teams to define the future of AI-assisted shopping. The role requires owning the architecture, evaluation, and scalability of the AI system.
What you'll do
- Own the architecture of the agentic system and integrate new AI advancements
- Design evaluation frameworks to measure performance and prevent regressions
- Expand agent capabilities including web search, vector search, and catalog lookups
- Ingest, standardize, and enrich a product catalog of hundreds of millions of entries
- Leverage user data for deep personalization of the shopping experience
- Fine-tune models to improve quality, reduce latency, and cut costs
- Ensure infrastructure handles high traffic with zero downtime and minimal latency
- Collaborate with Product to define and implement new AI-driven features
What you'll need
- 5+ years of software engineering experience with production system delivery
- Senior or Staff level experience owning projects from design to production
- Proficiency with agentic frameworks like LangChain or LangGraph
- Experience with LLM observability tools such as LangFuse
- Familiarity with LLM APIs and evaluation tooling for AI systems
- Fluent in English, both written and spoken
- Comfortable with full-stack tasks including infrastructure and frontend prototyping
- Strong problem-solving skills for latency, cost, and hallucination challenges
Nice to have
- Background or degree in AI or Machine Learning
- Track record of building production AI systems used by real users
Stack
- LangChain
- LangGraph
- LangFuse
- LLM APIs
- CoderPad
How you'll work
- Remote-friendly for residents of France and Spain
- Option to work from Paris office or home with no constraints
- Coworking space access and budget provided for non-Paris residents
- Permission to work from most countries for up to 3 months per year
What you get
- Top-market compensation package
- Equity opportunities for all employees
- Half-day weekly dedicated to AI skill development
- Yearly offsite trips and monthly in-person gatherings
- Contribution to ClassPass subscription
- 8 weeks of fully paid leave for the second parent
Hiring process
- Intro call with Hiring Manager or Talent team
- 45-minute team interview with two Joko members
- 90-minute live technical interview on CoderPad
- 45-minute leadership interview with SteerCo member and Founder
- Reference checks with up to three former colleagues