Vector

Forward-Deployed Engineer, API — Vector Location: Boston, MA (Hybrid) · Stage: Seed → Series A · Reports to: Head of Engineering 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. We let marketers build ad audiences from real, verified contacts — people actively visiting their site, engaging with their brand, or researching competitors right now. Then we sync those audiences directly to LinkedIn, Meta, Google, Reddit, and more. The result: less spend on noise, more spend on actual buyers. We went through Y Combinator, we're backed by serious investors, and we're preparing for a Series A. The core platform has product-market fit. Now we need someone to own what comes next. 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 You'll be the internal owner of the API product — its roadmap, its reliability, and its trajectory. You'll work closely with engineering and leadership to prioritize what gets built, and you'll have the technical chops to build some of it yourself. This isn't a PM role where you write tickets and wait. You ship. Technical onboarding and integration support When a customer is integrating with our API, you're the person making sure it goes well. You'll guide their engineering teams through implementation, troubleshoot issues, and build the tooling and processes that make onboarding repeatable — not a fire drill every time. Developer enablement Our docs, SDKs, and developer experience need an owner. You'll build and maintain the resources that let customers self-serve where possible and get unstuck fast when they can't. If you've ever been frustrated by bad API documentation, this is your chance to build what you wished existed. Pre-sales technical scoping You'll join sales conversations when there's a technical integration to scope — understanding the prospect's stack, defining what the integration looks like, and giving the team an honest read on complexity and feasibility. You're not carrying a quota, but your ability to translate between business value and technical implementation will directly influence revenue. Feedback loop to product and engineering You'll be closer to API customers than anyone in the company. That means you're the one surfacing patterns — what's breaking, what's missing, what would unlock the next wave of adoption. You'll turn field signal into product direction. Who We're Looking For You can code and you can communicate. This role requires both. You're comfortable writing production-quality code, and you're equally comfortable explaining a technical concept to a non-technical stakeholder or hopping on a call with a customer's senior engineer. People who are strong at one but not the other won't thrive here. You've worked on developer-facing products. You understand what makes a good API, a good SDK, and a good developer experience. You've either built these things or been close enough to have strong opinions

Product Engineer — Vector Location: Boston, MA (Hybrid) · Stage: Seed → Series A · Reports to: Engineering Leadership 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. We let marketers build ad audiences from real, verified contacts — people actively visiting their site, engaging with their brand, or researching competitors right now. Then we sync those audiences directly to LinkedIn, Meta, Google, Reddit, and more. The result: less spend on noise, more spend on actual buyers. We went through Y Combinator, we're backed by serious investors, and we're preparing for a Series A. The core platform has product-market fit. Now we need engineers who can push it forward. The Opportunity Vector's platform is working. Customers are on it. Revenue is growing. But the surface area of what we need to build is expanding faster than the team — new signal sources, attribution and recommendation products for ad campaigns, deeper integrations across the ad ecosystem. We're hiring Product Engineers across several product areas. The common thread: you'll work closely with product and design to understand what customers need, then own the execution from architecture through deployment. We're not looking for engineers who just want to be handed a ticket — we want people who are genuinely curious about the problem, have opinions about the solution, and take pride in shipping something that actually works for customers. If you want to build at a company where your work directly moves the business, keep reading. What You'll Own End-to-end product areas You'll own meaningful product surfaces — not just tickets. You'll partner with product and design to understand the problem, then own the execution: architecture, implementation, shipping, and iteration. Depending on the role, that could mean working on new signal ingestion pipelines, building attribution and recommendation products for ad campaigns, or deepening how our platform connects to the broader ad ecosystem. Full-stack development You'll work across the stack. Frontend when the product needs it, backend when the system needs it. We're not looking for someone who only touches one layer. The product areas you work on will require you to move fluidly between the UI your customers interact with and the data infrastructure that powers it. Product curiosity, not just code You'll work alongside product and design, but we expect you to show up with opinions. The best engineers here dig into why something matters — they ask good questions, push back when something doesn't make sense, and bring ideas to the table. You don't need to own the roadmap, but you should care about what's on it. Shipping and iterating We're a small team building fast. You'll ship frequently, get feedback quickly, and adjust. Perfection on the first try isn't the expectation. Good judgment about when something is ready to ship — and when it needs another pass — is. Who We're Looking For You build things end-to-end. You've taken features from design through production — not just inherited a backlog. You're comfortable owning the execution of a feature, and you bring thoughtful input to the product conversations around it. You work across the stack. You don't need to be an expert in every layer, but you can move between frontend and backend without waiting for someone else. You've built user-facing features and you've built the systems behind them. You're curious about the problem, not just the code. You want to understand why something is being built, not just how. You ask good questions, you dig into customer context, and you're not satisfied shipping something you don't believe in. You've worked at an early-stage company — or you operate like someone who has. Small teams, fast cycles, shifting priorities. You don't get paralyzed when the plan changes. You recalibrate and keep going. You care ab