Senior Software Engineer, .NET

Full-time

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—and looking for passionate engineers to help shape the future.

The role

We are growing our team with passionate Senior Software Engineers to help build the core services that support our platform and products. You'll work on highly visible, impactful projects that directly serve both our clients and internal teams—partnering closely with Product, Sales, and Business Development.

Base Salary + Equity

What You'll Do

Lead the design, architecture, and development of backend services

Own and operate high-performance systems using C# and Postgres

Mentor junior engineers through code reviews, design sessions, and pair programming

Build automated testing and benchmarking systems to ensure reliability and speed

Who You Are

5+ years of backend development experience with .NET Framework/Core

Skilled in relational database design and implementation (Postgres, MSSQL, Oracle, etc.)

Comfortable working with major cloud platforms (AWS, GCP, Azure)

Experienced in owning services end-to-end—from planning to deployment

Strong communicator who can explain complex ideas clearly and concisely

Collaborative, proactive, and driven to build things that matter

Bonus Points If You Have

Experience building data-driven systems

AdTech knowledge or industry experience

A deep interest in scalable, intelligent systems

What You’ll Find at Cognitiv

Festiv – We make work fun with cross-team games, events, and creative team bonding.

Responsiv – You’ll be close to clients and leadership, influencing real outcomes.

Inclusiv – Diversity and individuality are celebrated across all levels.

Inventiv – We reward curiosity and embrace bold ideas.

Transformativ – We support your growth with training, mentorship, and flexibility.

Collaborativ – We operate across coasts, connected by purpose and teamwork.

Location & Compensation

Location: New York City (hybrid: 3 days in-office, 2 days remote)

Compensation is based on experience, skills, and other factors. Base salary is just one part of your total rewards at Cognitiv—you’ll also receive equity and a comprehensive benefits package.

Highlights include:

Medical, dental & vision coverage (some plans 100% employer-paid)

12 weeks paid parental leave

Unlimited PTO + Work-From-Anywhere August

Career development with clear advancement paths

Equity for all employees

Hybrid work model & daily team lunch

Health & wellness stipend + cell phone reimbursement

401(k) with employer match

Parking (CA & WA offices) & pre-tax commuter benefits

Employee Assistance Program

Comprehensive onboarding (Cognitiv University)