This role is for one of the Weekday's clients Salary range:  $150K - $190K / 2.00% - 3.00% Experience: 3+  YoE

We are seeking a highly skilled Founding Software Engineer (Full-Stack) to join our team in San Francisco, CA. This role focuses on solving the challenge of automating all the time-consuming tasks developers face outside their code editor — from deployments to performance, incidents, and bug resolution — using agentic workflows and AI. You will work directly with two experienced co-founders: one who has led engineering efforts at scale for internal developer platforms used by thousands of engineers, and another who has successfully founded, scaled, and sold a developer-focused startup. Requirements Key Responsibilities Event-Driven Backend Development: Architect a Node.js / Next.js / TypeScript and Supabase stack. Design schemas, event flows, and ingest dev tools webhooks to power a real-time personalized engineering portal. LLM Agentic Workflows: Build a system of AI agents, incorporating MCP, tool usage, memory, retry logic, context updates, and feedback loops. Agent Experience (AX): Design intuitive human-agent interaction interfaces, collaborating closely with engineers to refine productivity-focused digital co-pilots. System Design & Technical Strategy: Partner with leadership to define scalable technical paths, balancing rapid delivery with integration flexibility for diverse developer tools and open-source community support. Ideal Candidate Profile Full-stack 0-to-1 builder with production deployment experience, particularly in rapidly shipping Next.js applications and event-driven, serverless architectures. Strong interest in agentic product experiences and the impact of AI on developer productivity. Prior experience as a founder or founding engineer who has built products from scratch that gained real users or paying customers. Problem-solver who thrives on tackling hard challenges with grit and persistence. Comfortable navigating ambiguity, prioritizing effectively, and adapting to changing circumstances. Excellent communication skills with a high degree of candor and openness. Deep commitment to supporting engineers in overcoming operational inefficiencies. This Role is Not a Fit If You Are not based in the Bay Area (team will be co-located in San Francisco). Are unwilling to work six days a week (Sundays off). Are not excited about leveraging modern code-generation tools (e.g., Cursor, Windsurf, Claude Code). Are uncomfortable with frequent deletion/refactoring of large portions of code. Prefer rigid structures over dynamic, fast-changing environments. Avoid direct and honest feedback exchanges. The Opportunity Work alongside two seasoned co-founders — one with deep experience scaling developer platforms, and another with proven success building and exiting a dev tools startup. Gain end-to-end startup exposure , from customer support and user interviews to events and core development. Become the first engineering hire at a company aiming to define the next category-leading developer platform used and paid for by leading tech companies.