Senior Software Engineer II

Who We Are Kargo creates powerful moments of connection between brands and consumers to build businesses. Every day, our 600+ employees work to radically raise the bar on what agentic AI, CTV, eCommerce, social, and mobile can do to deliver unique ad experiences across the world's most premium platforms. Taking a creative science approach to all we do, we continuously innovate solutions that outperform industry benchmarks and client expectations. Now 20+ years strong, Kargo has offices in NYC, Chicago, LA, Dallas, Sydney, Auckland, London and Waterford, Ireland. Who We Hire Techies who want to build the future. Creatives who want to design it better. Communicators to win business. Collaborators to build it. Data pros who turn numbers into insights. Product builders who turn ideas into innovations. Anyone eager to be on a team that doesn't stop to ask what's next, because they're already building it. The Opportunity The Kargo Workflow Platform powers our entire AdTech engine, and we're modernizing it. As a Senior Engineer on the team, you'll design and build distributed services that are reliable, observable, and built to last — owning projects end-to-end and partnering across engineering, product, and data. We're looking for a self-starter who finds problems, frames them, and fixes them, and who makes the engineers around them better in the process. The Daily To-Do Design and build distributed services for the Workflow Platform modernization, thinking about failure modes, retry logic, and observability from the startOwn significant projects end-to-end — from design through deployment and post-launch optimization — with minimal hand-holdingImprove platform health through latency reductions, fault tolerance, and observability enhancements with measurable outcomesUse AI-assisted development tools fluently to ship faster, and actively share what's working with teammatesRaise the quality bar through code reviews and design discussions, contributing well-reasoned opinionsPartner with Product, Data, and cross-functional stakeholders, translating fluently between technical and non-technicalMentor less experienced engineers through pairing, documentation, and patient, constructive guidance Qualifications 5–8 years of software engineering experience, with meaningful time in distributed or high-scale backend systemsStrong proficiency in at least one modern, high-performance language; TypeScript and/or Golang strongly preferredSolid understanding of distributed systems concepts: consistency, availability, fault tolerance, event-driven architecture, and service orchestrationExperience building and maintaining microservices in production at meaningful scale; async messaging (Kafka, Pub/Sub) or workflow engines a strong plusComfortable with CI/CD pipelines, containerization (Docker, Kubernetes), cloud infrastructure (AWS, GCP, or Azure), and debugging production issues using monitoring and distributed tracingActive user of AI coding tools (Cursor, Copilot, or equivalent) with real, demonstrated productivity gainsB.S. or higher in Computer Science, Engineering, Mathematics, or equivalent practical experience; AdTech, programmatic, or real-time systems experience a plus In accordance with applicable federal, state, and local pay transparency laws, the anticipated base salary range for this position is listed below. In addition to base salary, this role is eligible for variable compensation — either the Kargo Sales Incentive Plan (sales roles) or an annual discretionary bonus (all other roles). Actual compensation may vary based on factors such as geographic location, work experience, education, and skills. U.S Salary Range $185,000—$200,000 USD What We're Proud Of AdAge Best Places to Work ThinkLA Partner of the YearBuilt In Best Places to Work Cynopsis 2025 Top Women in Media - Jeannine Shao CollinsMartech Breakthrough Awards - Best Overall Adtech CompanyDigiday Media Awards Best EventCynopsis Media Impact Awards-Best CTV PlatformMartech Breakthrough Awards-CTV InnovationAdweek Media Plan of the Year Awards - Best Use of Insights Following Our Lead Big Picture: kargo.comThe Latest: Instagram (@kargo.hq) and LinkedIn (Kargo) Kargo is an Equal Opportunity Employer. We are committed to building an inclusive and diverse workplace where all employees and applicants are treated with respect and dignity. We do not discriminate on the basis of race, color, ethnic origin, religion or belief, sex, sexual orientation, gender identity or expression, age, disability, marital or family status, national origin, veteran status, or any other characteristic protected by applicable local, state, or federal law. All qualified applicants will receive consideration for employment. Pursuant to applicable fair chance laws, including the San Francisco Fair Chance Ordinance and the Los Angeles Fair Chance Initiative for Hiring, Kargo will consider qualified applicants with arrest and conviction records for employment.