Principal Software Engineer (AdTech)

TL;DR

Principal Software Engineer (AdTech): Architecting and executing complex integrations between the automation platform and major Demand-Side Platforms (DSPs) with an accent on API design, high-throughput data orchestration, and platform-specific operational semantics. Focus on building resilient, scalable integration layers and leveraging AI-augmented workflows to manage massive-scale digital advertising campaigns.

Location: Must be based in the United States (Remote or optional office in Burlington, VT).

Salary: $160,000–$184,000 per year.

Company

Fluency is a digital advertising automation platform that simplifies complex ad operations for agencies and brands at a massive scale.

What you will do

• Architect and maintain integrations with major DSPs like The Trade Desk, Amazon DSP, and Basis.
• Design and own partner API integrations using REST and GraphQL, ensuring robust handling of rate limits, retries, and idempotency.
• Encode complex DSP operational semantics into the platform to ensure accurate campaign execution and reporting.
• Collaborate with partner-side engineering teams to unblock integration challenges and drive technical direction.
• Set high-level technical standards through architectural decisions, code reviews, and design leadership.
• Triage and resolve critical partner-integration defects and client-launch issues.

Requirements

• 8+ years of software development experience with a strong focus on backend architecture.
• Direct experience integrating with major DSPs as a consumer of their APIs.
• Deep expertise in Java and Spring Boot, including event-driven architectures like Kafka.
• Proven proficiency with cloud infrastructure (AWS) and distributed systems at high data volumes.
• Must have legal authorization to work in the U.S.
• Strong understanding of partner API patterns including REST, GraphQL, and authentication.

Nice to have

• Experience building production systems that integrate LLMs, deterministic rules, and machine learning models.
• Track record of working in AI-augmented engineering workflows.

Culture & Benefits

• Comprehensive medical, dental, and vision coverage for employees and families.
• 401(k) plan with company match.
• Four weeks of Combined Time Off (CTO) plus twelve holidays.
• Flexible work schedule with remote work options and home office stipends.
• Supportive environment focused on inclusivity, open communication, and growth.