Founding Software Engineer
Role summary by JobGrid
Founding Software Engineer at clera: San Francisco, United States; On-site; Senior; IT; Full Stack Engineer. This listing is part of JobGrid's Software engineer jobs from public company career pages. JobGrid adds normalized role facts, source context, and a path to the employer application page so candidates can compare the listing before applying.
- Location and workplace: San Francisco, United States, On-site
- Role classification: IT, Full Stack Engineer, Senior
- Source freshness: checked by JobGrid on 2026-06-09.
- Application path: candidates continue to the employer application page with non-personal referral tags.
About the Role
We're building an AI motion design platform and this is our founding engineering hire. You'll work closely with the founders to shape the technical foundation, own end-to-end development, and help scale a product designed to empower millions of users with fast, high-quality animations.
What You'll Do
Partner with the founders to deliver user-centric product solutions from concept to production.
Own end-to-end development of full-stack features with scalable architecture design.
Build and optimize agentic LLM systems incorporating tool-calling, multi-step reasoning, and MCP protocols.
Design comprehensive LLM evaluation frameworks with automated benchmarks, human-in-the-loop validation, and A/B testing.
Optimize LLM inference performance, cost efficiency, and latency across multiple model architectures.
Develop a high-performance motion graphics engine.
Drive architectural decisions that support scalable growth to millions of users.
What We're Looking For
Strong CS fundamentals.
Hands-on experience building or integrating large language models (LLMs), tool-calling, multi-step reasoning, and MCP protocols.
Experience designing and implementing LLM evaluation frameworks with automated benchmarks, human-in-the-loop validation, and A/B testing.
Demonstrated ability to deliver end-to-end full-stack features with scalable architecture.
Startup/early-stage company experience with an ownership mindset.
Proficiency with the full tech stack: TypeScript, React.js, Next.js, PostgreSQL, GCP, AWS.
Proficiency in optimizing LLM inference performance, cost efficiency, and latency across multiple model architectures.
Location
Berlin, Germany (office-based)