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Top Senior Backend Engineer Jobs in Denver & Boulder, CO

Reposted 2 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
Senior level
Senior level
AdTech
As a Senior Backend Engineer, you'll build and maintain backend services for ad buying systems, analyze data to improve performance, and mentor other engineers.
Top Skills: AWSCi/CdGCPGitKotlinLinux/UnixPysparkPythonSQL
Reposted 3 Days AgoSaved
Remote
Colorado, CO
179K-179K Annually
Senior level
179K-179K Annually
Senior level
Information Technology
As a Senior Backend Engineer at DuckDuckGo, you'll lead complex backend projects, mentor other engineers, and collaborate on privacy solutions, utilizing Perl, Go, and Node.js.
Top Skills: GoNode.jsPerl
Reposted 3 Days AgoSaved
Remote
Colorado, CO
Senior level
Senior level
Blockchain • Payments • Financial Services
Design, develop, and maintain backend infrastructure for cross-chain products. Focus on scalability and integration with blockchain networks. Seeking experienced developers with a crypto background.
Top Skills: Backend SystemsBlockchainCrypto ProtocolsSmart Contracts
Reposted 4 Days AgoSaved
Remote or Hybrid
Colorado, CO
159K-207K Annually
Senior level
159K-207K Annually
Senior level
Artificial Intelligence • Automotive • Machine Learning • Transportation
As a Senior Backend Engineer, you'll architect and enhance the OmniTag engine for data mining, optimize multimodal data pipelines, and ensure production reliability, directly impacting the efficiency of ML workflows.
Top Skills: AirflowAWSCi/CdJaxPythonPyTorchRaySparkSQL
Reposted 4 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
139K-203K Annually
Senior level
139K-203K Annually
Senior level
Artificial Intelligence • Information Technology • Machine Learning • Marketing Tech • Software • Biotech • Design
Develop and maintain backend solutions, ensuring performance, security, and regulatory compliance, while collaborating in cross-functional teams.
Top Skills: AWSFastapiPython
10 Days AgoSaved
Remote or Hybrid
Colorado, CO
100K-140K Annually
Senior level
100K-140K Annually
Senior level
Cloud • Insurance • Payments • Software • Business Intelligence • App development • Big Data Analytics
The role involves designing, developing, and delivering high-quality software solutions, conducting code reviews, and debugging applications, with a focus on SaaS-based development and software quality.
Top Skills: DjangoFastapiPostgresPythonReactTypescript
Reposted 5 Days AgoSaved
Remote
Colorado, CO
Senior level
Senior level
Gaming • Information Technology • Esports
Responsible for designing and maintaining scalable backend systems, leading architectural decisions, implementing security measures, collaborating with teams, and mentoring others.
Top Skills: AppsyncAWSCognitoDynamoDBGraphQLLambdaS3SqsSstTypescript
Reposted 6 Days AgoSaved
Remote
Colorado, CO
128K-267K Annually
Senior level
128K-267K Annually
Senior level
AdTech • Digital Media • Information Technology • Other
Seeking a Sr. Backend Engineer for Yahoo Sports with over 6 years of Java and Python experience, focusing on scalable web services in a fun team environment.
Top Skills: Api GatewayAWSDockerDynamoDBJavaKubernetesLinuxPythonS3Sqs
Reposted 11 Days AgoSaved
Remote
Colorado, CO
Senior level
Senior level
Artificial Intelligence • Productivity • Software • Automation
Join Zapier's Integration Quality team to enhance integration features and reliability, debugging systems, and mentoring engineers in a high-impact role.
Top Skills: APIsDatabricksLookerNode.jsTypescript
Reposted 6 Days AgoSaved
In-Office or Remote
Colorado, CO
Senior level
Senior level
Sports
Develop scalable backend systems, mentor team members, participate in code reviews, and collaborate with Product Owners to enhance features.
Top Skills: AWSDockerJava 8+KubernetesMongoDBMySQLRedisSpring BootSpring Cloud
Reposted 6 Days AgoSaved
Remote
Colorado, CO
Senior level
Senior level
Generative AI
Design and implement REST APIs and backend services, optimize performance, and ensure system reliability while working with cross-functional teams.
Top Skills: AWSAzureGCPKubernetesNode.jsNoSQLPostgresPythonTypescript
Reposted 6 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
158K-257K Annually
Senior level
158K-257K Annually
Senior level
Information Technology • Software
Develop and maintain scalable backend services and APIs at LaunchDarkly. Lead technical discussions, mentor peers, and ensure best practices in backend development and observability.
Top Skills: C++GoJavaRust
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Reposted 16 Days AgoSaved
Remote
Colorado, CO
Senior level
Senior level
Blockchain • Software • Financial Services • Cryptocurrency
Design and develop backend systems for Fern's financial products, ensuring accessibility and security for millions of users while moving large transaction volumes.
Top Skills: Backend EngineeringFintechWeb3
Reposted 12 Days AgoSaved
Remote
Colorado, CO
180K-230K Annually
Senior level
180K-230K Annually
Senior level
Software • Defense
Design and maintain backend services for a military workflow platform, focusing on scalability, performance, and reliability in production systems.
Top Skills: AWSAzureCi/CdDockerGCPGoGraphQLGrpcJavaKafkaKubernetesNode.jsNon-Relational DatabasesPub/SubPythonRelational DatabasesRest
8 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
195K-280K Annually
Senior level
195K-280K Annually
Senior level
Insurance • Software
The Senior Back End Engineer will develop and enhance critical services, manage APIs, optimize application architecture, and mentor junior engineers.
Top Skills: AWSDockerGoGraphQLGrpcKafkaKubernetesMongodbPostgresPythonSnowflakeTypescript
Reposted 8 Days AgoSaved
Remote
Colorado, CO
145K-170K Annually
Senior level
145K-170K Annually
Senior level
Artificial Intelligence • Fintech • Software • Financial Services
As a Senior Backend Engineer, you will build APIs and integrations, develop fault-tolerant systems, mentor engineers, and ensure code quality.
Top Skills: GitHerokuJavaScriptNestjsPostgresRabbitMQRedisTypeormTypescript
Reposted 8 Days AgoSaved
Remote
Colorado, CO
155K-205K Annually
Senior level
155K-205K Annually
Senior level
Artificial Intelligence • Cybersecurity
The Senior Backend Engineer develops core product features in ETL and GraphQL, designs APIs, builds ETL pipelines, and collaborates with frontend teams.
Top Skills: AWSAzureC++DockerGCPGoGraphQLJavaKubernetesNeo4JPostgresPythonScalaSQLTypescript
9 Days AgoSaved
Remote
Colorado, CO
Senior level
Senior level
Artificial Intelligence • Software
As a Senior Backend Engineer, you will design and develop intelligent backend systems, work with AI/ML workflows, optimize performance, and collaborate cross-functionally to enhance Catio's platform for tech architecture planning.
Top Skills: GoPython
14 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
Senior level
Senior level
Cloud • Security • Software • Cybersecurity • Automation
As a Senior Backend Engineer, you will develop and maintain deployment infrastructure for GitLab's self-managed customers, ensuring secure and scalable operations across various environments.
Top Skills: GoGrafanaHelmKubernetesPostgresPrometheusRubyTerraform
Reposted 20 Days AgoSaved
Remote
Colorado, CO
Senior level
Senior level
Artificial Intelligence • Software • Web3
The Sr. Backend Engineer will develop the core platform and web app using Typescript and Node.js, focusing on performance optimization and UI/UX implementation.
Top Skills: Node.jsTailwindcssTurborepoTypescript
Reposted 14 Days AgoSaved
Remote
Colorado, CO
140K-210K Annually
Senior level
140K-210K Annually
Senior level
Sales • Software • Automation
As a Senior Software Engineer, you will design, build, and launch backend systems and APIs, collaborate with cross-functional teams, and improve scalability and performance of the CRM application.
Top Skills: AnsibleAWSDockerElasticsearchFlaskGraphQLKubernetesMongoDBPostgresPythonRedisTerraformWebsockets
Reposted 9 Days AgoSaved
Remote
Colorado, CO
185K-217K Annually
Senior level
185K-217K Annually
Senior level
Mobile • Financial Services
The Senior Backend Engineer will lead AI-focused projects, optimize data pipelines, mentor juniors, and enhance customer support through innovative technologies.
Top Skills: AWSBedrockDatabricksKubernetesMatplotlibNumpyPandasPythonPyTorchSagemakerScikit-Learn
10 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
160K-240K Annually
Senior level
160K-240K Annually
Senior level
Sports
The Senior Backend Engineer will design and deploy APIs, build microservices for high-volume data, and drive technical initiatives in a fast-paced environment.
Top Skills: AWSAzureCi/CdDockerGCPGoKubernetesTerraform
Reposted 12 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
Expert/Leader
Expert/Leader
Artificial Intelligence • Machine Learning • Natural Language Processing • Conversational AI • Generative AI
The Senior Backend Engineer will develop and maintain backend systems, collaborate on data-driven solutions, and enhance products using machine learning.
Top Skills: Api DevelopmentCloud-Based TechnologiesData PipelinesJavaMachine LearningMicroservicesNode.jsPython
Reposted 11 Days AgoSaved
Remote or Hybrid
Colorado, CO
160K-180K Annually
Senior level
160K-180K Annually
Senior level
Artificial Intelligence • Information Technology • Security • Software
As a Senior Backend Engineer, you will design and build backend services, ensure system reliability, mentor junior engineers, and drive backend architecture discussions while using agile development practices.
Top Skills: AlembicAWSDatadogFastapiPostgresPydanticPytestPythonRedisSqlalchemyTemporal.IoTerraform
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