Principal Software Engineer

What we're building and why we're building it. 

Every month, millions of people use America's Rewards App, earning rewards for buying brands they love, and a whole lot more. Whether shopping in the grocery aisle, grabbing a bite at the drive-through or playing a favorite mobile game, Fetch empowers consumers to live rewarded throughout their day. To date, we've delivered more than $1 billion in rewards and earned more than 5 million five-star reviews from happy users. 

It's not just our users who believe in Fetch: with investments from SoftBank, Univision, and Hamilton Lane, and partnerships ranging from challenger brands to Fortune 500 companies, Fetch is reshaping how brands and consumers connect in the marketplace. When you work at Fetch, you play a vital role in a platform that drives brand loyalty and creates lifelong consumers with the power of Fetch points. User and partner success are at the heart of everything we do, and we extend that same commitment to our employees.

At Fetch, we value curiosity, adaptability, and the confidence to explore new tools, especially AI, to drive smarter, faster work. You don't need to be an expert, but you should be ready to learn quickly and think critically. We welcome learners who move fast, challenge the status quo, and shape what's next, with us.  Ranked as one of America's Best Startup Employers by Forbes for two years in a row, Fetch fosters a people-first culture rooted in trust, accountability, and innovation. We encourage our employees to challenge ideas, think bigger, and always bring the fun to Fetch.

Fetch is an equal employment opportunity employer.

Meet Fetch Engineering:

At Fetch, we are passionate about solving challenging problems and embracing ambiguity. Our engineering philosophy promotes adaptability and innovation over rigid adherence to rules. Our engineers thrive in complex environments, making well-informed decisions even in uncertain situations. We seek out the necessary information and focus on action and impact, while consistently upholding high technical standards. In this role, you will be a technical leader, shaping best practices to build world-class, user-facing technology. You will mentor fellow engineers, fostering technical growth and collaboration within the team. As a hands-on leader, you will actively contribute to the codebase and deliver features alongside your team.

Fetch is entering its AI-first era, and we're looking for a Principal Software Engineer to design, scale, and evolve the intelligent systems that power personalized consumer and advertising experiences for millions of users.

You will design and evolve the platforms that unify data, real-time learning, inference, and delivery, enabling Fetch to serve more relevant, trustworthy, and high-performing Ads while supporting a rapidly scaling consumer business. This role requires a combination of architectural depth, Ads systems expertise, and the ability to influence technical strategy across teams.

Operating at the intersection of ad intelligence, experimentation, and large-scale distributed systems, you will be a key technical force advancing Fetch's monetization engine. You'll collaborate with Product, Data Science, Platform, and ML teams to drive clarity, define architectural standards, and ensure our Ads systems become more adaptive, more measurable, and more efficient over time.

This is a hands-on, high-impact technical leadership role with influence across multiple engineering collectives. Your work will shape how Fetch evolves its Ads stack: relevance, ranking, performance, measurement, and revenue integrity at scale.

This role can be based in one of our US offices or remotely within the United States.

• Architect for Scale, Intelligence, and Ads Quality: Design and evolve the platforms supporting Ads selection, targeting, ranking, pacing, creative optimization, delivery, and measurement. Build systems that prioritize relevance, transparency, trust, and measurable advertiser and user value.
• Advance Intelligence in Production: Partner with ML and Data Science teams to operationalize models for ranking, bidding, feedback optimization, and pacing. Define architectural patterns for online inference, model safety, explainability, and low-latency, high-throughput decision-making.
• Evolve the Ads Platform: Advance the core systems powering Fetch's Ads: attribution, incrementality measurement, real-time signals, brand safety, fraud mitigation, and revenue integrity. Pioneer new approaches that raise both advertiser ROI and user experience quality.
• Define System and Experience Quality: Establish company-wide standards for ad and user experience quality, integrating performance, reliability, and relevance metrics. Establish platform-wide standards for performance, reliability, trust, and relevance. 
• Lead Through Influence and Product Partnership: Drive architectural alignment across Ads, Data, Platform, and Product teams. Translate tradeoffs into measurable business outcomes: improved ROI, latency reduction, yield lift, and better developer velocity.
• Scale Experimentation & Learning Systems: Improve experimentation frameworks, incrementality infrastructure, and rapid-iteration tooling. Enable faster learning loops across Ads algorithms, UX surfaces, and delivery pipelines.
• Accelerate Innovation Velocity: Champion AI-assisted development, scenario testing, simulation environments, and feedback-driven observability. Enable engineering teams to iterate faster while protecting user trust, system integrity, and revenue signals.
• Mentor & Multiply Engineering Impact: Coach senior engineers and rising technical leads, elevating standards for architectural clarity, AI-driven design, measurement rigor, and thoughtful system evolution. Amplify impact through reusable frameworks and technical patterns.
• Model Technical Excellence & Responsible AI: Promote principles of responsible AI, transparency, model accountability, and safety-by-design. Shape the engineering culture around intelligent system build practices.

• Experience with Ads or performance marketing systems (ranking, pacing, delivery, incrementality, attribution).
• Proven ability to design high-scale ad-serving or recommendation pipelines with strict relevance, latency, and reliability requirements.
• Deep expertise designing or scaling intelligent, data-intensive systems used for personalization, ranking, targeting, bidding, or real-time optimization.
• Strong intuition for data quality, attribution accuracy, and revenue-integrity metrics.
• Demonstrated leadership of cross-org technical initiatives that improved reliability, velocity, monetization performance, or intelligence.
• Experience bringing ML-driven systems to production: feature pipelines, inference, safety validation, and model governance.
• Fluency in modern software ecosystems (Kubernetes, event streaming, CI/CD, observability tooling, AI-assisted development workflows).
• Ability to influence technical strategy and explain architectural decisions in business terms.
• Growth mindset: thrives in high-velocity environments, with a relentless focus on measurable outcomes and system evolution.

• Experience with learning-to-rank, bidding, pacing, or real-time feedback optimization systems.
• Familiarity with LLM agent frameworks (LangChain, Semantic Kernel, Haystack) or RAG systems.
• Demonstrated experience improving observability, latency, or cost efficiency in intelligent systems.
• Exposure to multi-modal intelligence or contextual ranking models using structured and unstructured data.
• Strong judgment around AI integration: where it drives meaningful Ads performance versus where classical optimization is more effective.

At Fetch, we'll give you the tools to feel healthy, happy and secure through:

• Equity: We offer employees equity in Fetch, so that everyone can benefit from Fetch's growth.
• 401k Match: Dollar-for-dollar match up to 4%.
• Benefits for humans and pets: We offer comprehensive medical, dental and vision plans for everyone including your pets.
• Continuing Education: Fetch provides ten thousand per year in education reimbursement.
• Employee Resource Groups: Take part in employee-led groups that are centered around fostering a diverse and inclusive workplace through events, dialogue and advocacy. The ERGs participate in our Inclusion Council with members of executive leadership.
• Paid Time Off: On top of our flexible PTO, Fetch observes 9 paid holidays, including Juneteenth and Indigenous People's Day, as well as our year-end week-long break. 
• Robust Leave Policies: 20 weeks of paid parental leave for primary caregivers, 14 weeks for secondary caregivers, and a flexible return to work schedule. 
• Calvin Care Cash: Employees who are welcoming new family members will also receive a one time $2,000 incentive to assist employees with covering the cost of childcare, clothing, diapers and much more
• Flexible Work Environment: Collaborate with your team in one of our stunning offices in Madison, Birmingham, or Chicago. Or you can work fully remotely from anywhere in the US. We'll ensure you are equally equipped with the hardware and software you need to get your job done in the comfort of your home.

Fetch is an equal opportunity employer that embraces diversity, inclusion, and respect for all individuals. We do not discriminate on the basis of race, color, religion, gender, gender identity or expression, sexual orientation, age, national origin, marital status, veteran status, disability, or any other characteristic protected by applicable law. Our commitment to inclusivity ensures that everyone is treated with dignity and has the opportunity to succeed based on their talent, skills, and potential.

Fetch also provides reasonable accommodations to qualified individuals with disabilities or those with sincerely held religious beliefs, as required by law. If you need assistance with the application process or require an accommodation, please contact us at

Learn more: Fetch Recruitment Scam Warning.