Forward-Deployed Engineer, API

About Vector Vector is a contact-level advertising platform built for B2B demand generation teams who are tired of paying LinkedIn to show ads to people who will never buy from them. Forward‑Deployed Engineer, API — Vector Location: Boston, MA (Hybrid) Stage: Seed → Series A Reports to: Head of Engineering The Opportunity Vector’s API product exists — and it’s working. Customers are integrating with it. Revenue is coming in. But right now it’s being supported off the side of three people’s desks, none of whom can give it the attention it deserves. This is the hire that changes that. You’ll be the first person fully dedicated to our API product — owning everything from the technical onboarding experience to the SDK and documentation to scoping new integrations with prospects. You’re not joining a team. You’re building the foundation for one. This role sits at the intersection of engineering, product, and go‑to‑market. Some days you’ll be writing code. Other days you’ll be on a call walking a customer’s engineering team through an integration. Other days you’ll be shaping the roadmap based on what you’re hearing in the field. If you need a clean swim lane to be productive, this isn’t for you. If you like owning something end‑to‑end and making it real, keep reading. What You’ll Own API product ownership — internal owner of the API product: roadmap, reliability, trajectory. Prioritise build items. Ship. Technical onboarding and integration support — guide customers through implementation, troubleshoot issues, build repeatable tooling. Developer enablement — own docs, SDKs, developer experience. Pre‑sales technical scoping — join sales conversations, scoping integration complexity. Feedback loop to product and engineering — surface patterns, translate field signal into product direction. Who We’re Looking For You can code and you can communicate. Comfortable writing production code and explaining concepts to non‑technical stakeholders. You’ve worked on developer‑facing products. Built or influenced API, SDK, developer experience. You’ve operated in ambiguity. Experience at startup or ambiguous environments. You’re technical enough to be dangerous across the stack. Read/write code across backend, APIs, data pipelines, debug integrations. You default to ownership. Fix problems instinctively. Minimum experience: 3+ years in a technical role with customer‑facing or product‑facing exposure — solutions engineering, developer relations, forward‑deployed engineering, technical account management, or software engineering with customer interactions. Bonus if at early‑stage company. Bonus Points Experience with ad tech, martech, or B2B marketing platforms. Familiarity with identity resolution, audience targeting, or data integration workflows. Experience building or maintaining SDKs, developer documentation, or API reference sites. Background working with TypeScript/Node.js, AWS, or data pipeline tooling. Worked at a YC company or similar high‑velocity early‑stage environment. First hire in a function, built from zero. What We Offer Competitive base + meaningful equity. Full benefits. A seat at the table — participate in product and GTM decisions. The chance to own something. Not support something. Not maintain something. Own it. A Note on Culture We move fast and expect a lot. We are honest about what we are — seed stage, building, figuring things out. Those who thrive are comfortable with ambiguity, allergic to theater, and get satisfaction from watching a customer successfully integrate the product. If you want a role where boundaries are clearly drawn and someone else decides what’s important, this probably isn’t it. If you want to be the reason an entire product line works, keep reading. Vector is an equal opportunity employer. We don’t care where you went to school. We care what you’ve done and how you think. #J-18808-Ljbffr