# Senior Software Engineer, Backend at Cognitiv > United States · Senior · Backend · open. Source: https://alderhq.app/jobs/greenhouse%3Acognitiv%3A4398608009 (read 2026-11-07). ## Facts (observed) - Company: [Cognitiv](https://alderhq.app/companies/cognitiv) - Location text: Bellevue, WA; Bellevue - Where it can be done from (inferred): United States (evidence: "Location: Bellevue, WA; Bellevue") - Posted: 2026-09-08 (60 days ago) - First seen by alder: 2026-11-02 · last verified: 2026-11-04 - Reposted: 0 times · edited: 0 times - Apply on the employer's site: https://job-boards.greenhouse.io/cognitiv/jobs/4398608009 - Skills listed (inferred): Java, Kotlin, C#/.NET, Distributed systems ## Pay and sponsorship - Posted pay: not posted - Market band for similar posted roles (Seattle, n 12): p25 $182k, median $199k, p75 $208k ## Description (the employer's text) Are you ready to revolutionize the advertising industry? At Cognitiv, we are not just another AdTech company—we are industry trailblazers redefining media buying with our Deep Learning Advertising Platform. Since 2015, we have harnessed the power of cutting-edge deep learning technology and data science to transform how brands connect with their customers. Our mission? To bring intelligence to advertising and deliver unparalleled precision, relevance, and impact at scale. With our innovative platform, advertisers enjoy unprecedented flexibility—whether it is activating Dynamic Deals through their preferred DSP, leveraging our managed service DSP, or utilizing our industry-first ContextGPT product. As a part of Cognitiv, you will be at the forefront of AI-driven advertising solutions, driving change and achieving remarkable growth in a rapidly evolving industry. Now, we’re growing! ### The Role As a Senior Software Engineer, you will own the design, delivery, and reliability of the systems powering our next-generation, pixel-less ad targeting platform. You’ll translate complex requirements into scalable systems, navigating ambiguity and making the critical tradeoffs necessary to drive system performance and engineering effectiveness. In this role, you’ll own the design and delivery of backend solutions that support ContextGPT integrations, helping the platform scale across new partners, supply sources, and capabilities. You’ll work closely with other engineers and cross-functional partners to solve complex technical problems, make thoughtful tradeoffs, and deliver reliable solutions that support product and business growth. This position will be located in Bellevue with a hybrid work schedule of 3 days in office (Mon/Tue/Wed) and 2 days remote optional (Thursday/Friday). ### Your Impact In this role, success is measured by the reliability, scalability, and performance of our platform. You will: - Lead Technical Design: Own the end-to-end design and delivery of .NET Core backend services and APIs that power ContextGPT, proactively accounting for scalability, performance, failure modes, and security as the platform grows across the ad-tech ecosystem. - Elevate Reliability: Identify bottlenecks and improve system observability (metrics, logging, monitoring). You will lead blameless post-mortems and implement long-term systemic fixes to prevent incident recurrence. - Drive Engineering Excellence: Strengthen the team through high-quality code reviews, technical mentorship, and the creation of exemplary technical artifacts (design docs, diagrams). - Navigate Ambiguity: Exercise strong judgment to resolve unknowns and balance long-term system health with rapid development velocity. - Collaborate on Direction: Partner with Product and Engineering leadership to align technical solutions with business priorities and roadmap requirements. ### Required Experience & Capabilities - Ownership, Drive & Agency: You identify systemic problems, create solutions without waiting for direction, and drive execution through influence rather than authority, and connect technical decisions to measurable business outcomes. - System Design: Proven track record of designing, decomposing, and delivering high-scale production services or distributed systems. - Technical Proficiency: Strong programming skills in .NET Core or another strongly typed backend language such as Java or Kotlin, with experience building APIs, services, or data pipelines. - Operational Mindset: Deep understanding of system reliability, observability, and "up-front" design for maintainability. - Curiosity: You’re naturally curious and eager to understand how things work. You ask thoughtful questions, dig into unfamiliar systems and problems, and look beyond the immediate task to identify root causes and opportunities for improvement. - Communication: Clear ability to explain technical tradeoffs and decisions. ### Bonus Points If You Have - Experience designing large-scale distributed systems serving high-throughput production workloads - Deep experience building platform services or developer infrastructure used across multiple engineering teams --- Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/greenhouse%3Acognitiv%3A4398608009 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.