Senior Remote Fullstack Developer (AI Project / LLM)

Top 3 reasons to join us

• A second home supporting you to grow
• A multi-cultural work environment
• A salary that makes you happy

Job description

The Senior Fullstack Developer will be responsible for the following:

• Implement agents using LangGraph, LangChain, LangSmith, integrated with backend APIs.
• Orchestrate workflows with Flowise/n8n + Temporal.
• Build full-stack features: React UIs for agent interaction, backend APIs for retrieval + reasoning.
• Integrate with vector search (pgvector, Qdrant, Weaviate) for RAG.
• Implement evaluation + monitoring pipelines for agents (LangSmith).
• Optimize prompts for reproducible, explainable outputs.

Optional experience

• Prior work deploying production-grade AI agents.
• Orchestration with Temporal, workflow UIs (React Flow, Node-RED).
• Backend: Go, Python, or Node for API and orchestration layers.
• CI/CD pipelines for rapid iteration on agent logic.
• Knowledge of retrieval policies, embeddings, and prompt evaluation frameworks.
• Integrating agents into compliance-heavy environments (audit, lineage, logging).

Your skills and experience

The Senior Fullstack Developer will report directly to the Line Manager and will possess the following attributes:

• 5+ years full-stack development, with LLM/AI exposure.
• Ability to prototype rapidly while engineering for reliability.
• Comfortable across Go, Python, Node, React.
• Solid grasp of distributed systems + dataflow orchestration.
• Good English Communication Skills

Why you'll love working here

Get to work with a top-tier US-based AI company!!

Xenia offers a great working environment and great chances to grow with the company as we strive for success. We offer our team members the following:

• An open mind and flat structure where every voice is welcome.
• A work environment built on transparency, seamless communication, trust, and a sensible approach ,combined with mixed cultures and a speaking environment
• Individual assessments every 6 weeks with your line manager
• Performance review every  6 months
• 15 days of annual leave and + 6 days of fully paid sick leave per year – can be used for the care of sick child
• Christmas Holiday
• Competitive salary
• Bonus: 13th-month Salary

We strive towards a fun and healthy workplace where we offer Happy Hour, Lunch & Learn, Celebrate Birthday and many more fun activities to create that family setting that we enjoy when a part of the team being at Xenia Tech.