Programmatic Supply Specialist (m/f/d)

Hello, I am Tomás, Global Supply and Partnerships Lead at Kayzen, and I am looking for a Programmatic Supply Specialist to strengthen our Supply Partnerships team. In this role, you will directly manage supply partners, drive performance improvements across key accounts, and ensure the highest quality of inventory on our platform.
This is a hands-on, high-impact role at the intersection of partner management, data analysis, and technical troubleshooting.

Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through our self-serve and managed service options. Built on the three core pillars of performance, transparency, and control, Kayzen powers the world’s best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface.

The Supply Team lies at the intersection of demand and supply within Kayzen, that is we are responsible for the accessibility, efficiency, quality and development of ad inventory our customers access through the Kayzen DSP. Leveraging years of expertise in mobile programmatic supply, we ensure Kayzen’s customers gain access to the right inventory for their campaigns. Additionally, the Supply Team works closely with most of the teams at Kayzen, such as the Product Team in identifying new relevant signals available on bid requests, or the Marketing Team, in generating supply insights for thought leadership content.

• Own and manage relationships with key Ad Exchanges and publishers
• Run regular check-ins and Quarterly Business Reviews (QBRs) with key partners
• Monitor partner performance and identify and execute growth opportunities
• Evaluate technical integrations and drive improvements where needed
• Track and resolve media cost discrepancies and other troubleshooting in collaboration with internal teams
  
  

• Act as the bridge between Supply and commercial teams
• Support a customer- and revenue-centric supply strategy
• Monitor supply performance across top 5–10 strategic accounts
• Translate customer account-level insights into actionables for exchanges.
• Identify and unlock performance opportunities across supply partners
  
  

• Partner closely with the Product Support team to resolve supply-related issues
• Investigate and troubleshoot campaign delivery and performance challenges
• Analyze inventory data (e.g. bid requests, loss notifications) to foster data-driven decisions
• Identify quality issues and optimization opportunities within the supply chain
  
  

• 2+ years of experience in programmatic advertising, preferably managing supply (e.g. at a DSP or SSP)
• Background in partner management, account management, or customer-facing roles
• Strong understanding of the programmatic ecosystem (SSPs, DSPs, publishers, auction mechanics)
• Familiarity with key performance metrics (CPM, CTR, CPI, ROAS, win rate, etc.)
• Ability to analyze large datasets and derive actionable insights
• Experience working with SQL, Excel, Claude / GPT for data analysis
• Comfortable working with working with large amounts of raw level data and campaign performance metrics
• Capable of working independently and collaboratively
• Strong work ethics with an innovative and problem-solving approach
• Exceptional attention to detail