Founding Engineer

Mesh is building AI agents for accounting teams — starting with reconciliation, accruals, and journal entry automation for high-volume businesses like marketplaces and e-commerce platforms. Finance teams today spend countless hours manually stitching together exports from Stripe, Shopify, Salesforce, and internal tools just to close the books. We’re replacing that manual grind with intelligent agents that can ingest messy operational data, apply accounting logic, and generate clean journal entries — all in a transparent, auditable way. Think: No-code rule builder for accountants to define automations Agents that handle reconciliation, accruals, and workflows across systems Event-to-journal workflows that eliminate spreadsheet chaos No-code rule builder for accountants to define automations Agents that handle reconciliation, accruals, and workflows across systems Event-to-journal workflows that eliminate spreadsheet chaos We’re not building another dashboard — we’re building infrastructure that plugs into the financial backend of the company. We’re looking for a founding engineer to help build the core platform: Ingest and model messy event data Define and execute workflows that generate accounting outputs Build AI-powered tooling that finance teams actually trust Ingest and model messy event data Define and execute workflows that generate accounting outputs Build AI-powered tooling that finance teams actually trust You’ll work directly with the founders (ex-Carta, finance, infra) and be hands-on across the stack — from workflow engines and LLM interfaces to the orchestration layer that drives journal entry creation and reconciliation. Backed by $2M in seed funding from exceptional investors, we’re now focused on building out the founding team. We are looking to grow our team in San Francisco, and will help with relocation. You might be a fit if: You’ve built complex backend systems (event-driven, data pipelines, infra, etc.) You’re comfortable shipping fast, debugging hard problems, and iterating in a messy v0 You’re excited by the idea of owning core technical decisions and building from scratch Bonus: experience with accounting systems, financial data models, or AI agents You’ve built complex backend systems (event-driven, data pipelines, infra, etc.) You’re comfortable shipping fast, debugging hard problems, and iterating in a messy v0 You’re excited by the idea of owning core technical decisions and building from scratch Bonus: experience with accounting systems, financial data models, or AI agents Why join us now? We’re early — real customers, real revenue, but still pre-Series A You’ll have massive ownership in shaping both product and culture It’s a rare opportunity to reinvent workflows that every company on earth has YC-backed (W25), early design partners, and a team that deeply understands the problem We’re early — real customers, real revenue, but still pre-Series A You’ll have massive ownership in shaping both product and culture It’s a rare opportunity to reinvent workflows that every company on earth has YC-backed (W25), early design partners, and a team that deeply understands the problem Mesh is building AI-native infrastructure for accounting — combining a flexible rules engine, intelligent data workflows, and LLM-powered agents that help finance teams automate reconciliation, accruals, and journal entries. ⚙️ Stack Overview Backend: Python, FastAPI, Postgres Frontend: React, TypeScript, Tailwind Infra: AWS, Redis, Postgres AI: GPT-4 / Claude, Langchain, Pydantic AI, in-house agent tools We care about clean abstractions, auditable outputs, and shipping fast with real users in the loop.