Full Stack AI Engineer

We are seeking a Full Stack AI Engineer to join a fast-growing SaaS company building AI-native products. The role will accelerate AI feature delivery, contribute to agentic workflow architecture, and support a company-wide rebrand implementation.

Responsibilities

• Design and ship AI-powered features end-to-end, with emphasis on backend and LLM integration layers.
• Build and maintain pipelines for AI agents, RAG workflows, and API integrations with LLM providers (OpenAI, Anthropic, etc.).
• Contribute to refactoring and modernizing legacy systems with AI readiness in mind.
• Collaborate with product, design, and research teams in a distributed environment.
• Implement design updates as part of a rebranding initiative (typography, assets, UI components).

Must-Have Skills

• 8+ years in engineering, with proven SaaS/B2B experience.
• Strong in TypeScript, Node.js, React, PostgreSQL.
• Hands-on experience integrating LLMs into production systems (prompt engineering, tool use, context management).
• Familiarity with agentic frameworks (LangChain, LlamaIndex, or similar) or building custom agent pipelines.
• Exposure to system design and scaling at enterprise level.
• Ability to ship high-quality features fast.
• Experience with vector databases (pgvector, Pinecone, Weaviate) is a plus.
• Experience migrating legacy systems or supporting multi-region infra is a plus.

Soft Skills

• Agentic mindset: builds autonomous, outcome-driven solutions — not just features.
• Stays current with the fast-moving AI tooling landscape; opinionated about what to use and why.
• Excellent cross-team communication in distributed environments.

What we offer:

• Competitive salary and bonuses
• Flexible work hours
• Remote job
• Professional development opportunities
• Vibrant workplace culture

Why working at Diffco?

• Great experience and opportunity:
  You will work on the fast-forward projects in Silicon Valley utilizing the latest technologies, methodologies, frameworks and approaches with the ability and time to learn and develop professionally.
• Professional and harmonious team of friends:
  Our team is a second family, so you would enjoy spending the day working on nice projects with kind people with broad interests.
• A vast field for growth:
  Learn continuously, expand your skills and demonstrate your professional level and ability to take more responsibility to grow.
• Great company culture:
  We care about you and are interested in your personal professional goals, motivation and we build a perfect work/life balance.

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