Performance Marketing Manager, Paid Search & AI Advertising

At LangChain, our mission is to enable every company to own its intelligence. We believe agents will transform how companies operate, and we're building the foundation to make that future possible. Our open-source harnesses and LangSmith platform give developers and enterprises the infrastructure to run, improve, and govern agents at scale.

We've raised $460M to date, with our most recent funding round valuing the company at $3B, backed by leading investors including Sequoia, Benchmark, IVP, and CapitalG. As we continue to expand our platform and tackle some of the hardest challenges in agent engineering, every team member has the opportunity to make a meaningful impact and help shape both our technology and the future of the industry.

More than 7,000 organizations rely on LangSmith, from fast-growing startups to Fortune 500 enterprises, including NVIDIA, Bridgewater, LinkedIn, Workday, and Rippling. We're just getting started on making high-performing agents easier to build and manage at scale.

We're hiring an experienced Performance Marketer to own and scale paid search and emerging AI advertising channels at LangChain, starting with Google Ads, Bing (Microsoft Advertising), and ChatGPT.

You'll own the entire paid acquisition experience, from developing channel strategy and building campaigns to optimizing landing pages, improving conversion rates, and driving qualified pipeline.

This is a highly hands-on role. You'll be the person building campaigns, analyzing performance, testing creative, improving landing pages, and identifying new opportunities to scale.

We're looking for someone who combines deep paid search expertise with a willingness to experiment with emerging advertising platforms. You should be comfortable managing significant budgets, making data-driven investment decisions, and connecting advertising performance to downstream pipeline rather than just clicks, leads, or conversions.

• Own the strategy across Google Ads, Bing, and ChatGPT advertising, with the opportunity to expand into additional AI-native advertising channels.

• Develop channel-specific strategies based on audience intent, available targeting capabilities, and expected pipeline contribution.

• Own budget allocation, forecasting, and performance against pipeline targets.

• Balance investment across branded, non-branded, competitor, and product-specific campaigns, along with emerging AI advertising opportunities.

• Identify opportunities to scale high-performing campaigns and build repeatable playbooks for new channels.

• Develop testing roadmaps across audiences, messaging, bidding, conversion experiences, and new advertising formats.

You'll own campaign execution across all three channels:

• Google Ads: Build, launch, and manage campaigns across branded, non-branded, competitor, and product search, including keyword research, match types, negative keywords, bidding, and budget optimization.

• Bing / Microsoft Advertising: Develop and manage campaigns tailored to Microsoft's search audience, identifying opportunities to extend reach and capture incremental high-intent demand.

• ChatGPT advertising: Develop and execute an early advertising strategy, testing available placements, audience approaches, messaging, and conversion experiences as the platform evolves.

• Creative and messaging: Write and test ad copy in partnership with Product Marketing, adapting messaging to each channel and its user intent.

• Experimentation: Run structured tests to improve acquisition efficiency, traffic quality, and pipeline conversion.

• Campaign operations: Own campaign setup, tracking validation, launch readiness, troubleshooting, and day-to-day optimization.

• Own the website conversion experience for traffic acquired through Google, Bing, and ChatGPT.

• Build and optimize dedicated landing pages for paid acquisition campaigns using Webflow or similar tools.

• Develop and execute A/B tests across landing page messaging, layouts, CTAs, and forms.

• Identify friction across the full user journey, from ad interaction to product sign-up, demo request, or meeting booking.

• Optimize conversion paths for both developers exploring LangSmith and enterprise buyers evaluating commercial solutions.

• Partner with Marketing Operations to improve form conversion, qualification, routing, and meeting booking.

• Ensure landing page experiences reflect the user's intent and context across different advertising channels.

• Own performance reporting across spend, traffic, conversions, qualified leads, meetings, opportunities, and pipeline.

• Develop channel-specific measurement frameworks for Google Ads, Bing, and ChatGPT based on their available reporting and conversion capabilities.

• Partner with Marketing Operations to connect advertising conversion signals with HubSpot and Salesforce data.

• Optimize established search channels toward downstream pipeline signals, including offline conversion tracking where supported.

• Establish a testing and measurement approach for emerging channels where attribution and optimization capabilities may be less mature.

• Analyze performance across channels, audiences, campaigns, and landing pages to identify where to invest, optimize, or reduce spend.

• Partner with Product Marketing to translate positioning into search campaigns, AI advertising messaging, and landing page experiences.

• Work closely with Web and Design on landing page development and conversion experimentation.

• Collaborate with Marketing Operations on tracking, attribution, CRM integrations, and reporting accuracy.

• Align with Demand Generation on product launches, campaign priorities, budget allocation, and pipeline targets.

• 5–11 years in performance marketing, paid search, or B2B growth marketing, ideally in developer tools, infrastructure, or technical SaaS.

• Deep hands-on expertise in Google Ads and experience managing Microsoft Advertising.

• Proven experience personally building, launching, and optimizing paid search campaigns.

• Strong understanding of campaign architecture, keyword intent, bidding strategies, negative keywords, and search budget optimization.

• Experience testing new advertising platforms or emerging acquisition channels. Curiosity about AI-native search and advertising is important.

• Strong experience with conversion rate optimization, landing page development, and A/B testing.

• Experience managing meaningful budgets and optimizing toward qualified pipeline and revenue outcomes.

• Strong analytical skills and fluency in CPC, CVR, CPL, cost per opportunity, pipeline contribution, and attribution.

• Working knowledge of Google Ads, Microsoft Advertising, GA4, Google Tag Manager, HubSpot, Salesforce, and Flint/Webflow.

• Comfortable with technical products and developer audiences.

• A strong experimentation mindset and willingness to build new programs without an established playbook.

• Comfortable with ambiguity and true ownership.

We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks. Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, and life insurance.

Salary Range: $165,000-$190,000

We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks.

We are hiring for this role across a range of scope, and the compensation band reflects that. Your offer depends on what we learn about your impact, craft, leadership, and communication during the interview process. We will tell you early where you’re tracking and talk comp with you before offer stage. Team members in the EU, UK, and APAC receive locally competitive benefits aligned with regional norms and regulations.

Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.