Top Senior Backend Engineer Jobs in Denver & Boulder, CO

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 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 Software Engineer will lead and support a team in developing reliable and scalable backend systems, collaborating on product development, and improving infrastructure for secure communication between services.

The Senior Software Engineer will design and develop scalable applications, enhance DevOps practices, and drive continuous improvement within infrastructure and systems.

The role involves designing and expanding backend systems, mentoring engineers, and executing technical strategies to modernize architecture and improve system performance.

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

Build and improve frontend experiences for login, signup, OAuth, account security, and multi-user/org support. Contribute to migrating main views to React Native, design high-performance React/TypeScript UIs, collaborate with backend engineers and product teams, and write well-tested, reliable code to maintain low-latency user surfaces at scale.

The Senior Backend Engineer will develop, test, and maintain scalable integrations, support cross-functional teams, and enhance developer experiences.

The Senior Backend Engineer will develop tools and APIs for Remote's HR and Payroll products, mentor engineers, and drive innovation in automation workflows across teams.

As a Senior Backend Engineer, you will design, implement, and maintain complex integrations with various third-party systems and ensure high performance and reliability in a cloud-native environment, focusing on AI-driven product features.

The Senior Back-End Developer will lead backend initiatives, mentoring a team, developing infrastructure with PHP and Laravel, and optimizing technology.

The Senior Back-End Engineer at Forum One develops complex WordPress solutions, integrates APIs, and collaborates with teams to enhance digital platforms.

As a Senior Backend Engineer, you will develop tools, APIs, and integrations, ensuring production systems are secure and scalable using Elixir, with responsibilities including mentoring and project leadership.

Build and scale secure, high-performance backend systems and APIs that connect onchain protocols and offchain infrastructure. Own integrations with custodians, KYC/identity, payments, and third-party blockchain tooling. Collaborate with smart contract and frontend teams, enforce backend standards, and support ops, investor services, and compliance with automation and observability tooling.

Design and build scalable backend systems, data pipelines, and cloud infrastructure. Own CI/CD, containerization, databases, and reliability; collaborate with tech leads to deliver secure, production-grade solutions for startups in a fully remote environment.

The Senior Backend Engineer will design and implement infrastructure for an AI system, solve complex data-related problems, and ensure system scalability and security.

As a Senior Backend Engineer, you'll develop and maintain the Dynamic Copay Engine's services, design pricing logic, and manage data integrations, focusing on backend systems for health insurance functionality.

As a Senior Back-End Engineer II, you will focus on platform engineering and DevOps, building CI/CD pipelines, managing cloud infrastructure, and supporting database operations.