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Senior Backend Ads Engineer

United States, Boston · Job Posted February 21, 2026
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Job Description

As a Senior Backend Engineer on the HTS Media team, you will be a core contributor to the engine that powers our entire advertising platform. You will be responsible for designing, building, and scaling the high-throughput, low-latency services that handle ad requests, run auctions, and serve millions of relevant offers to travelers in real-time. This is a mission-critical role where your work will directly impact platform performance, advertiser success, and Hopper’s bottom line.

Job Responsibility

  • Build the Core Engine: Design, develop, and deploy high-performance microservices for ad serving, targeting, and bidding
  • Optimize for Scale and Speed: Obsess over system performance, identifying and eliminating bottlenecks to ensure our services meet stringent low-latency requirements
  • Ensure High Availability: Build resilient, fault-tolerant systems and implement robust monitoring to maintain rock-solid reliability
  • Drive Technical Excellence: Lead architectural discussions, conduct code reviews, and champion best practices in software development
  • Collaborate for Impact: Partner closely with product managers, data engineers, and the rest of the engineering team to ship cohesive, high-impact features
  • Mentor and Lead: Provide technical guidance and mentorship to other engineers on the team, helping to level up the entire organization

Requirements

  • 5+ years of professional software development experience, with a focus on building distributed, backend systems
  • Direct experience in ad tech or retail media is required
  • This includes familiarity with concepts like ad serving, real-time bidding, and ad campaign management
  • Proven track record of designing and operating high-throughput, low-latency services in a cloud environment
  • Strong experience with high-performance databases and caching systems
  • Deep understanding of system design, data structures, and algorithms
  • A strong sense of ownership and the ability to thrive in a fast-paced, entrepreneurial environment where you can make a significant impact

What we offer

  • Well-funded and proven startup with large ambitions, competitive salary and the upsides of pre-IPO equity packages
  • Unlimited PTO
  • Carrot Cash travel stipend
  • Access to co-working space on demand through FlexDesk AND Work-from-home stipend
  • Very generous parental leave, much above industry standards
  • Entrepreneurial culture where pushing limits and taking risks is everyday business
  • Open communication with management and company leadership
  • Small, dynamic teams = massive impact
  • 100% employer paid Medical, Dental and Vision coverage for employees
  • Access to Disability & Life insurance
  • Health Reimbursement Account (HRA)
  • DCA/ FSA and access to 401k plan

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