Senior Backend/Full-stack Developer

Wunderkind is a performance marketing solution that uses AI and data to help brands acquire and retain customers through one-to-one, personalized messages across websites, email, text, and ads, guaranteeing a lift in revenue. Founded in 2010, Our goal is to scale a brand’s ability to create and grow customer relationships through websites, email, text, and ads. An internet that treats humans like real people instead of “web traffic.” We also believe in empowering brands to treat their customers as individuals, satisfying their unique needs with tailored experiences and thoughtful communication. By expertly personalizing, automating, and scaling beautiful one-to-one experiences, Wunderkind helps brands acquire new customers at scale and keep them loyal for life.
We are seeking a senior full stack engineer who can help deliver Wunderkind Advertising's roadmap across supply, demand, and platform investments. This includes building and scaling campaign placements and triggers (overlay takeovers, mastheads, in-feed, gallery / milestone units, slider placements, progress bars, ad refresh, and multiple-campaign activation), integrating SSP demand sources, improving OpenRTB-based auction flows, and evolving advertiser / publisher tooling and reporting. The ideal profile combines strong backend engineering, practical frontend product development, and fluency in ad-tech concepts and vocabulary.
A senior engineer who can move comfortably between backend services, APIs, data / event flows, and frontend product surfaces without losing momentum in either layer.
Someone who can reason about advertising systems using the language of supply, demand, campaigns, placements, bid requests, SSP integrations, OpenRTB, creative constraints, pacing, segmentation, and reporting.
An engineer who can translate roadmap themes into implementation plans - for example, new ad placements, campaign-type expansion, refresh logic, segmentation controls, bulk-edit tooling, publisher workflows, and advertiser-facing reporting capabilities.
A pragmatic builder who can operate in ambiguity, identify the right system boundaries, and ship incremental value while preserving long-term platform quality.
Ads-space experience is a strong asset; Design, build, and maintain full stack product capabilities across backend services, APIs, frontend interfaces, and internal tools that support Wunderkind Advertising.
Build frontend and backend workflows that support advertiser and publisher use cases, including segmentation controls, placement configuration, campaign setup, and bulk-edit or operational tooling.
Partner closely with product managers, designers, and engineers to translate roadmap items into clear technical designs, scoped milestones, and production-ready implementations.
Help shape architecture and delivery decisions around latency-sensitive systems, event-driven workflows, privacy-aware data handling, and operational reliability.
5+ years of professional software engineering experience, including substantial hands-on experience in both backend and frontend development.

• Strong proficiency in at least one backend language such as Go, Java, or similar, with experience building production APIs, services, and integrations.
• Strong proficiency in modern frontend development, ideally with React and TypeScript, including experience building product configuration or operational interfaces.
• Ability to model and implement business logic for campaigns, placements, segmentation, reporting, or workflow configuration in a scalable and maintainable way.
• Solid understanding of distributed systems fundamentals, production debugging, observability, and performance considerations.
• Ability to reason about ad-tech concepts such as supply and demand flows, SSP integrations, OpenRTB, VAST, impression / click tracking, creative metadata, privacy signals, and latency-sensitive request paths.
• Comfort working across the full delivery lifecycle: discovery, technical design, implementation, testing, deployment, and post-launch support.
• Ability to work independently and autonomously without requiring constant supervision.
• Experience in the Ads, CTV, SSP, DSP, OEM, or broader ad-tech space is a strong asset.

Familiarity with OpenRTB, VAST, impression / click tracking, privacy signals, and creative rendering workflows.
Experience building configurable campaign, placement, segmentation, or rules-based product capabilities.
Experience with advertiser reporting, publisher tooling, dashboards, or bulk-edit / operations interfaces.
Exposure to video, image, or creative-processing pipelines, including asset packaging or transformation flows.
You independently deliver meaningful product and platform work across both backend and frontend surfaces.
You raise the team's ability to operate in Ads by bringing strong technical judgment and by navigating the language and constraints of the domain.
You help reduce execution risk by identifying technical gaps early, shaping sound implementation plans, and driving work to completion.
This role is intended for a senior engineer who can bring the technical language, systems thinking, and implementation depth needed to operate effectively in a growing Ads / CTV space.