Principal Software Engineer
First seen by Alion on Sep 15, 2026.
About the Role :
PubMatic is seeking an experienced and technically strong Principal Software Engineer to lead the design and development of next-generation Mobile App Monetization capabilities. This role is focused on building high-performance, low-latency, scalable, and privacy-safe systems that help maximize publisher revenue from in-app inventory while improving DSP and buyer spend efficiency.
Total Experience : 5-12 years
What You'll Do :
- Architect and implement scalable backend services powering mobile app monetization, extracting, transforming, and optimizing in-app behavioral data using on-device computation, data aggregation, and differential privacy techniques.
- Build and optimize SSP-DSP integration workflows for mobile app inventory, including app bundle validation, device and geo signal handling, and privacy-aware user signal processing.
- Design mobile-specific traffic shaping and QPS optimization systems that prioritize high-value in-app inventory.
- Improve runtime handling for Mobile App ad formats such as rewarded video, interstitial, native, banner, app-open, playable, and in-app video.
- Build capabilities that improve buyer/DSP compatibility for MApp inventory, ensuring buyers receive well-represented, privacy-compliant, format-compatible, and supply-quality-aware mobile app requests.
- Develop systems and diagnostics to improve Mobile App supply quality, including app bundle validation, app-ads.txt, sellers.json, and SupplyChain object validation.
- Support privacy-aware and attribution-ready Mobile App advertising, including ATT/IDFA handling, AAID availability, consent enforcement, COPPA/child-directed treatment, and SKAN readiness.
- Partner with MApp SDK and OpenBid/S2S integration teams to define signal-quality standards and request-field expectations.
- Build publisher-facing and buyer-facing diagnostics for MApp inventory, including missing-field reports, app quality signals, and buyer no-bid diagnostics.
- Work with DSP Partnerships and Marketplace Quality teams to improve buyer confidence in PubMatic's MApp supply.
- Collaborate with Product, Data Science, Publisher teams, DSP Partnerships, Marketplace Quality, MApp SDK, OpenBid/S2S integrations, and SRE to define and execute the roadmap.
- Champion operational excellence for Mobile App advertising systems through strong observability, reason codes, structured logs, dashboards, alerts, and production debugging.
We'd Love for You to Have :
- Five plus years of backend engineering experience, with a proven track record of building high-scale, low-latency systems in AdTech domains.
- Strong knowledge of mobile app inventory signals, ad formats, and performance advertising concepts.
- Experience with mobile attribution and measurement ecosystems (MMPs, SKAdNetwork, etc.).
- Strong knowledge of mobile privacy and compliance constraints (ATT, IDFA, Android Advertising ID, GDPR, CCPA/CPRA).
- Practical knowledge of mobile supply quality and fraud prevention.
- Excellent interpersonal and communication skills with a collaborative mindset.
AI-Enabled Engineering Mindset :
We value engineers who actively leverage Generative AI tools and IDEs (e.g. GitHub Copilot, ChatGPT, Claude, Cursor, Windsurf etc.) to accelerate development, improve code quality, and automate repetitive tasks.
Qualifications : Bachelor's degree in engineering (CS / IT) or equivalent degree from well-known Institutes / Universities.
Skills
DSP, Workflows, QPS, Mobile App Architecture, Mobile App Integration, Mobile Ecosystem