Top Senior Backend Engineer Jobs in Denver & Boulder, CO

The Senior Backend Engineer will develop the Payroll product, overseeing the entire development cycle from design to deployment, in a microservices architecture.

Design, build, and maintain scalable backend services and APIs for commerce workflows using Python/Django. Improve reliability, performance, and observability, operate AWS deployments, work with PostgreSQL and event-driven architectures (SNS/SQS), modernize legacy systems, and support CI/CD, testing, and production troubleshooting.

Develop and maintain software applications, collaborate in agile teams, mentor junior engineers, and enhance digital experiences using modern technologies.

As a Senior Backend Engineer at DuckDuckGo, you'll lead backend projects, mentor engineers, and develop AI-enhanced features for the company's privacy-centric product line.

The Senior Backend Engineer II will design, build, and maintain backend services for financial workflows, collaborating with product and engineering teams to enhance system reliability and performance.

The Senior Backend Engineer will design, build, and maintain backend services and technologies for Openly's insurance platform, focusing on API development and system integration while providing mentorship and collaborating on architecture decisions.

The Senior Backend Engineer will enhance data integration infrastructure, manage internal systems, and collaborate with teams to execute engineering tasks for growth initiatives.

As a Senior Software Engineer, you'll own backend systems, mentor team members, and collaborate with product and design to build user-focused solutions.

The Senior Back-End Engineer will build cloud-native back-end services, APIs, and microservices for a health technology platform, focusing on scalability, security, and compliance.

The Senior Staff Software Engineer will architect Affirm's lakehouse analytics platform, lead data governance efforts, mentor engineers, and collaborate across teams to optimize data solutions using Snowflake and other big data tools.

Design, build, and operate cloud backend services powering connected hardware: device connectivity, telemetry ingest, state management, and data pipelines. Own features end-to-end, lead medium projects, mentor juniors, collaborate with firmware/mobile/platform teams, apply AI-native engineering practices, and participate in on-call incident response and post-mortems to ensure scalable, secure, reliable systems.

Own and enhance a large section of the API platform: lead technical direction, design and build API decisioning products, write automated tests, troubleshoot/resolve production issues, ensure SLAs and participate in on-call rotations, and collaborate with product, security, and engineering teams.

As a Senior Software Engineer, you will enhance data pipelines, integrate with EHR systems, and mentor fellow engineers while ensuring scalable and reliable solutions for health technology.

Design, implement, and maintain Python backend services and scalable data pipelines using dataframes, Parquet, and Databricks. Optimize distributed processing, build APIs, ensure data quality and observability, and mentor engineers.

Design and operate backend services in Python/Django, focusing on APIs, data modeling, performance, and reliability. Collaborate with teams to enhance user workflows and support production issues.

As a Senior Backend Engineer at Akkio, you'll design and build backend systems for an AI-driven platform, lead projects, mentor junior engineers, and optimize cloud infrastructure.

As a Senior Backend Engineer, you'll design scalable services and APIs, maintain systems, and collaborate with teammates to enhance the product experience.

As a Senior Backend Engineer at Offchain Labs, you'll tackle complex distributed systems challenges, optimizing performance and contributing to the security and scalability of blockchain technology.

The Senior Backend Engineer will lead the development of backend services, collaborate with teams, and ensure scalable, user-focused solutions while leveraging modern software practices.

Design and develop scalable backend services using Java and Spring Boot, build REST APIs, improve performance and maintainability of systems, and collaborate in an Agile environment.

As a Senior Backend Engineer in Conversational AI, you will design and implement intelligent systems, lead technical projects, mentor teammates, and ensure the quality of your team's code while collaborating with cross-functional partners.

As a Senior Backend Engineer, you will architect and optimize backend services for e-commerce, ensure reliability, enhance CI/CD pipelines, and mentor team members.

The Sr Software Engineer will enhance platform performance, develop cloud-native systems, improve CI/CD processes, and oversee deliverables while collaborating with feature teams.

The Senior Backend Engineer will maintain a PHP-based payment platform, migrate to Rust, troubleshoot production systems, and contribute to code quality and deployment cycles.

The Backend Software Engineer will develop data ingestion pipelines, implement observability tools, and provide technical support while improving team collaboration.