Software Engineer, Backend at Cognitiv

Department: Engineering

Compensation · Listed in posting

$130,000 – $170,000/yr

Setup: Hybrid
Location: Bellevue, Washington
Type: Full-time
Level: mid
Posted: Sep 17, 2026

Description

Cognitiv is hiring a Backend Software Engineer for its Core team, which builds the foundational platform powering real-time bidding and campaign execution. The role owns features end-to-end, delivers production-ready .NET Core/C# software with strong testing and observability, maintains service reliability, contributes to architecture and design, and mentors interns or new hires. The position uses .NET Core/C#, SQL/Postgres, ClickHouse, AWS, and DataDog, and offers a $130,000–$170,000 USD base salary plus equity and benefits.

Required Skills

.NET Core
C#
PostgreSQL
ClickHouse
AWS
DataDog
Data Systems
Test Coverage
SLOs

Additional Information

Required Previous Experiences: Experience building and shipping production software in a collaborative engineering environment
Hands-on experience with relational databases and high-volume data stores
Experience independently delivering small-to-medium features end-to-end within a sprint cadence
Experience with on-call responsibilities, runbooks, and system reliability
Background in real-time bidding, ad serving, or latency-sensitive, high-throughput systems
Preferred Qualifications: .NET Core/C# proficiency
Cloud platforms, distributed systems, or developer workflow experience
Adtech or real-time bidding experience
Translation Company Name: Cognitiv