Top Senior Software Engineer Jobs in Denver & Boulder, CO

Build and maintain production frontend applications for mission-critical communications software. Develop reusable UI components, integrate frontend systems with APIs and backend services, implement testing and CI/CD pipelines, resolve performance and usability issues, and contribute to technical requirements and architecture. Provide technical leadership through code reviews, agile planning, mentorship, documentation, and collaboration with engineering, UI/UX, and customer stakeholders.

Build and scale mission-critical tips, earnings, and payroll platforms for restaurant employees. Own systems end to end, lead complex projects from design through deployment, improve reliability and correctness, collaborate with product and design, review code, mentor engineers, and deliver scalable backend services that affect employee pay and product revenue.

Develop and maintain a fraud-analysis web application and platform. Build APIs and user interfaces, write automated tests, troubleshoot production issues, collaborate with product and cross-functional teams, analyze product metrics, and support SLA compliance through production on-call rotation.

Develop and maintain a fraud-analysis web application and platform, with 60–70% frontend focus. Build APIs, collaborate with product and cross-functional teams, write automated tests, analyze product metrics, troubleshoot issues, maintain service-level requirements, and participate in on-call support. The role uses React, backend languages, databases, Docker, and AWS technologies in a remote U.S.-based environment.

Design, build, deploy, and operate secure cloud-native microservices for Cyderes’ Security-as-a-Service platform. Translate customer and business needs into technical requirements, develop APIs, manage containerized workloads across major cloud providers, improve testing and CI/CD, and participate in code reviews, mentoring, documentation, security practices, and on-call production support.

Develop and maintain Intelerad’s Unified Storage Layer and cloud storage services for medical imaging applications. Responsibilities include designing storage features, translating requirements into solutions, maintaining AWS infrastructure, designing Kubernetes clusters, provisioning with Terraform, managing CI/CD pipelines, debugging issues, reviewing code, documenting solutions, and collaborating in an Agile/Scrum environment.

Manages development of on-premises and SaaS software products, leading distributed engineering teams and driving operational efficiency. Responsibilities include mentoring engineers, overseeing projects, collaborating with global management, improving development processes, and guiding agile teams across frontend and backend initiatives. The role requires strong technical expertise, people leadership, knowledge of Azure cloud services and Azure DevOps, and the ability to manage remote teams and resolve conflicts.

Develop, integrate, deploy, and sustain satellite ground software across the full software development lifecycle. Build full-stack, microservice-based applications using Java and other technologies for command and control, mission planning, constraint checking, and dynamic visualization. Support architecture, testing, CI/CD, cloud deployment, system integration, troubleshooting, and production operations while collaborating with program management and government customers. The role requires active Top Secret clearance with SCI eligibility.

Leads the design, development, and delivery of scalable real-time event-based systems for bonus and offers functionality. Builds and maintains full-stack services using Go, TypeScript, React, SQL, Kafka, and GCP. Responsibilities include technical leadership, solution governance, code quality, estimation, documentation, production ownership, mentoring, coaching, and serving as an escalation point for the team.

Leads end-to-end development of high-throughput distributed systems and edge data-processing pipelines. Responsibilities include system design, coding, testing, automation, deployment, performance troubleshooting, production support, code reviews, technical strategy, and rotating on-call duties. The role also requires mentoring, architectural leadership, and collaboration across teams while improving system maintainability, diagnosability, and reliability.

Lead the architecture, design, and implementation of scalable, low-latency backend services and REST APIs using Python and Flask. Design database schemas, optimize queries, implement authentication and observability, and build fault-tolerant distributed systems. Lead technical reviews, establish API and engineering standards, mentor engineers, and collaborate across teams on architecture and integrations. The role requires expertise in backend development, RESTful architecture, security, cloud platforms, CI/CD, containerization, testing, and emerging AI technologies.

Staff Software Engineer responsible for technical strategy, scalable full-stack systems, team operations, reliability, monitoring, code quality, and talent development. The role involves building customer-facing card experiences and backend services using Python or Kotlin, AWS, MySQL, Spark, Kubernetes, and React-based frameworks. The engineer will own features end to end, collaborate cross-functionally, manage technical risks and trade-offs, support on-call health, and apply AI safely to improve development and customer experiences.

Develop, integrate, test, and maintain embedded software and ground-system applications. Build CI/CD pipelines, automated tests, and containerized solutions while applying systems engineering practices for requirements, interfaces, verification, and validation. Support customer design reviews and mission integration activities, collaborate across engineering teams, present technical information, and provide leadership and mentorship. The role requires on-site work, an active Secret clearance, and eligibility to obtain TS/SCI.

Develop, integrate, test, and maintain embedded software and ground-system applications. Build CI/CD pipelines, automated testing infrastructure, and technical solutions for complex software integration challenges. Support systems engineering activities, customer program reviews, presentations, and mission integration. Provide technical leadership, mentor less-experienced employees, and collaborate across engineering teams. The role requires on-site work, an active Secret clearance, and the ability to obtain and maintain TS/SCI clearance.

Develop, integrate, test, and maintain embedded software and ground systems, including CI/CD pipelines, automated testing, and integrations with industry-standard applications. Apply systems engineering practices for requirements, verification, validation, interfaces, and design reviews. Support customer program gates, mission integration, and technical presentations while providing leadership and mentoring to less experienced engineers. The role requires on-site work five days per week and an active Secret clearance with the ability to obtain TS/SCI.

Build and ship web-based transportation management software for trucking customers. Collaborate with product, UX, engineers, and users to solve domain-specific problems, deliver features quickly, make sound quality-versus-velocity tradeoffs, and contribute across the engineering team in a remote-first environment.

Lead large-scale initiatives for a high-performance Linux-based network sensor, improving ingestion, scalability, continuous capture, queue reliability, observability, and production diagnostics. Own root cause analysis and postmortems, establish engineering standards, translate business goals into technical plans, and mentor engineers through design and code reviews. The role requires deep Rust expertise, distributed systems experience, concurrent programming, packet capture, message brokers, and cybersecurity best practices.

Own end-to-end full-stack development across web applications, Chrome extensions, mobile platforms, and backend services. Build scalable React interfaces and Node.js microservices handling large datasets and concurrent requests. Translate customer needs into technical solutions, integrate APIs, create workflows and schemas, and deliver iterative, high-quality features. Collaborate autonomously with product and remote engineering teams while supporting post-launch improvements.

Develop and launch scalable full-stack web applications using PHP, Laravel, SQL, JavaScript, React, and related technologies. Responsibilities include building APIs, designing database schemas, optimizing queries and code, implementing secure and maintainable software, collaborating cross-functionally, mentoring junior developers, and owning features through production in an agile continuous-deployment environment.

Designs, develops, tests, documents, and maintains scalable software and bioinformatics pipelines. Builds data models, ETL processes, APIs, microservices, databases, dashboards, and workflow integrations supporting genomic analysis such as assembly, mapping, variant calling, and annotation. Collaborates with analysts, scientists, clinical reviewers, laboratory staff, and developers to translate requirements into production-ready solutions. Optimizes queries and performance, applies CI/CD and testing practices, and ensures maintainable, well-documented software.

Leads architecture and technical direction for cloud-based SIGINT microservices supporting an Intelligence Community mission. Responsibilities include mentoring engineers, defining roadmaps, developing Java/Spring Boot and Angular applications, managing databases and containerized environments, and owning GitLab CI/CD pipelines. The role also oversees testing, deployment, security, observability, customer communications, and scheduled on-call support in an Agile environment.

Develops, tests, documents, maintains, and enhances software solutions using Appian and related technologies. Integrates Appian with external systems and services, resolves technical problems, remediates security vulnerabilities, improves performance, and participates in planning and user-story analysis. The role follows software development processes, documents standards, and mentors engineers while helping prioritize work for a development team.

Build and operate infrastructure for evaluating coding agents and language models. Own end-to-end features across data models, APIs, background workers, and user interfaces; run sandboxed agent trials; develop scoring and task-quality systems; integrate models and benchmarks; optimize performance, concurrency, migrations, and reliability; and review code. The role requires independent ownership of production backend systems and hands-on LLM evaluation experience.

Designs and maintains relational databases and web interfaces for aerospace Thermal and Loads data. Integrates databases with Python codebases, processes simulation and experimental data, and produces customer reports and visualizations. Collaborates with engineering teams to ensure data integrity, usability, and accessibility while improving architectures, workflows, and documentation. The role also plans, develops, tests, debugs, and documents mission-critical software according to established standards.

Design and build healthcare messaging solutions using C# .NET, RESTful APIs, Azure, and DaVinci FHIR. Develop web services, map healthcare message structures, write unit and integration tests, review code, troubleshoot production issues, and deploy software to Azure. Collaborate across teams, mentor junior engineers, manage complex projects, and improve prior authorization workflows.