Software Engineer, Backend

Cognitiv · Bellevue, WA

  • Junior
  • Full-time
  • $130,000 – $170,000
  • Posted 2026-09-17
  • Confirmed live on 25 September 2026

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Job description

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

The Core team builds the foundational platform powering Cognitiv’s real-time bidding and campaign execution engine. Every campaign on our DSP flows through this platform—managing budgets, pacing, strategies, creatives, and configuration while feeding vital controls to high-scale downstream systems. As our scope expands, we’re looking for engineers who want to own meaningful platform architecture rather than take on narrow subsystem tickets.

As a Backend Software Engineer on the Core team, you will take on substantial platform challenges and carry them end-to-end from design through production. You will translate business and performance requirements into reliable, production-ready software across our campaign management systems while driving code quality, system stability, and steady engineering progress.

Your Impact

In this role, success is measured by the quality, reliability, and consistency of your engineering contributions. You will:

• Own Feature Delivery: Take responsibility for a feature from kickoff through post-launch support, owning the release plan, branch strategy, canary, and automated rollback.

• Deliver Reliable Code: Author production-ready code with meaningful observability (metrics/traces/logs) and automated test coverage ≥ 80%. Recognize edge cases and propose straightforward solutions with moderate guidance.

• Strengthen Reliability: Keep service SLOs green by adding missing alerts and dashboards proactively. Participate in on-call and contribute to blameless post-mortems with actionable follow-ups within sprint.

• Contribute to Design: Author design docs for single-feature or single-service work that incorporate cost, scale, and rollback considerations. Connect features to OKRs or user metrics and advocate for small UX improvements.

• Collaborate & Mentor: Facilitate design or planning meetings for the team, build trust with adjacent teams through reliable follow-through, and mentor interns or new hires on the codebase and processes.

Tech Stack: .NET Core (C#), SQL/Postgres, ClickHouse, AWS, DataDog

Required Experience & Capabilities

• Technical Proficiency: Strong programming skills in one or more modern backend languages (preferably .NET Core/C#), with experience building and shipping production software in a collaborative engineering environment.

• Data Systems: Hands-on experience working with relational databases (PostgreSQL/SQL) and high-volume data stores.

• Engineering Craft: Solid understanding of testing, debugging, code review, and software development best practices; consistently delivers well-tested, maintainable code.

• Delivery: Track record of independently delivering small-to-medium features end-to-end—from design through deployment—within a sprint cadence.

• Operational Awareness: Familiarity with on-call responsibilities, runbooks, and contributing to system reliability and operational health. (DataDog, AWS)

• Communication: Clear communicator who can explain decisions and collaborate effectively with technical and non-technical partners.

• Ability to Deliver & Ownership: Proven track record of independently taking small-to-medium features from concept to production within a sprint cadence, taking end-to-end accountability for code quality, rollouts, and post-launch health.

• Dealing with Ambiguity & Autonomy: Comfortable breaking down loosely-scoped tickets into clear technical tasks, asking the right questions early, and executing with moderate guidance rather than step-by-step direction.

• Learning & Adaptation: Quick to adopt new technologies, operational tools, and domain concepts, adjusting smoothly as system needs and business priorities evolve.

Bonus Points

• Platform & Tooling Experience: Experience with cloud platforms, distributed systems, or improving developer workflows, documentation, or internal tooling.

• Adtech/RTB Experience: Background in real-time bidding, ad serving, or similarly latency-sensitive, high-throughput systems is a plus.

Salary: $130,000 - $170,000 USD Base Salary + Equity

What We Offer

Compensation is bas

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