Top Entry Level Software Engineer Jobs in Denver & Boulder, CO

Develop and scale full-stack web applications for Toast’s digital storefront, including online ordering and website products. Design solutions, improve performance and usability, collaborate with Product and Design, run experiments, resolve critical issues, and contribute to API design, testing, and cross-team product integration.

Develop and maintain satellite command-and-control, mission-planning, mission-data processing, and data-analysis software using Elixir. Collaborate on architecture, design, and code reviews while working across engineering disciplines. The role requires functional programming, resilient and fault-tolerant distributed systems, front-end development, live-system debugging, and strong communication. Preferred experience includes Elixir OTP, React, TypeScript, OAuth2, network protocols, databases, and distributed-system monitoring.

Develop and launch scalable full-stack search systems using JavaScript, TypeScript, Python, or Kotlin. Collaborate with engineers and stakeholders, balance delivery speed with system reliability, debug code, participate in code reviews, write tested and extensible software, and contribute to team growth and communication.

Develop and maintain full-stack healthcare applications using C#, .NET, ASP.NET Core, JavaScript, and SQL Server. Design APIs, services, background jobs, database procedures, and responsive interfaces; troubleshoot across application and deployment layers; write automated tests; modernize legacy systems; build secure healthcare integrations; and protect sensitive data. Collaborate with product, QA, support, and implementation teams while participating in design reviews, code reviews, testing, and release validation.

Develops defense software across the full lifecycle, including requirements analysis, object-oriented design, coding, unit testing, integration, formal testing, documentation, and delivery support. The role coordinates software development activities, debugs programs, resolves system and programming issues, applies software standards, and collaborates with multidisciplinary teams. Work requires C or C++ experience, software architecture and integration expertise, U.S. citizenship, and a Secret clearance before starting.

Develops, tests, debugs, documents, and maintains software for business or mission applications. Applies software development standards throughout the lifecycle, resolves programming issues, prepares operating instructions, and ensures quality requirements are met. The role may involve containerization, cloud environments, CI/CD pipelines, Agile tools, Linux, shell scripting, and troubleshooting multi-service systems. A bachelor's degree and programming experience are required, along with U.S. citizenship and the ability to obtain a Top Secret clearance.

Supports the full software engineering lifecycle, including requirements analysis, object-oriented design, coding, unit testing, integration, formal testing, delivery, and maintenance. Develops, documents, tests, debugs, and corrects software using C, C++, or Python. Applies software development standards and processes, analyzes system requirements, prepares documentation, and supports mission-focused applications in a collaborative environment.

Design, develop, test, integrate, and maintain C++ and Python software for remote sensing mission processing, exploitation applications, simulations, and edge-processing hardware. Troubleshoot embedded applications, optimize software, build CI/CD pipelines, support algorithm validation simulations, and document designs, code, and test results. The role also involves legacy code enhancement and cross-functional collaboration.

Develops defense software through the full lifecycle, including requirements analysis, object-oriented design, coding, unit testing, integration, formal testing, documentation, and delivery support. The role focuses on modeling and simulation, software architecture, debugging, and mission-focused solutions using C or C++. It requires collaboration with multidisciplinary teams, adherence to software standards, and knowledge of Agile development and MBSE. A Final Secret clearance and U.S. citizenship are required.

Develops, tests, documents, debugs, and supports software for a classified geospatial intelligence program. Responsibilities include software requirements verification, Scrum-based development, operational support, resolving software issues, and ensuring development standards are met. The role requires Java and/or TypeScript/Angular expertise and may involve Kubernetes, Docker, CI/CD tools, web services, and AI prompting.

Build and maintain Soluna’s data center control systems and data infrastructure. Responsibilities include architecting Maestro, improving software testing and deployment practices, developing internal data products, managing AWS cloud infrastructure, debugging industrial interfaces, and creating reliable mission-critical applications using Elixir and other technologies.

Develops and integrates hardware-software solutions, maintaining interface documentation and supporting the software development lifecycle. Designs, tests, debugs, and documents mission software while creating validation tools with Perl or Python. Collaborates across multidisciplinary teams, supports hardware-software verification, and applies software standards, Agile practices, and DevOps/DevSecOps concepts. Requires U.S. citizenship and an Interim Secret clearance with eligibility for a Final Secret clearance.

Develops and integrates hardware-software solutions by managing interfaces, documentation, validation, testing, debugging, and software lifecycle activities. Uses Perl or Python to build validation tools and may work with C++, DevOps/DevSecOps, CI/CD, and Agile practices. Collaborates across multidisciplinary teams, verifies implementations against requirements, and ensures software standards are met. Requires an active Interim Secret clearance and eligibility for a Final Secret clearance.

Develops and integrates software for the EADGE-T integrated air and missile defense system. Responsibilities include decomposing roadmap features, implementing and testing software, conducting peer reviews, debugging, contributing to architecture discussions, and collaborating with cross-functional teams in an Agile Scrum environment. The role requires Python and Java proficiency, SDLC knowledge, automated testing, CI/CD experience, and eligibility for a Secret DoD clearance.

Develops and supports software across the full lifecycle, including requirements analysis, object-oriented design, coding, unit testing, integration, formal testing, documentation, and delivery. Collaborates with multidisciplinary teams to resolve software issues and ensure standards are met. The role requires C or C++ experience and a Secret clearance, with preferred experience in RTOS platforms, Agile development, MBSE, and software requirements engineering.

Develops, tests, debugs, documents, and maintains software solving business or mission problems. The role covers the full software development life cycle, including design, architecture, integration, testing, requirements development, error correction, documentation, and operating instructions. The engineer collaborates with multidisciplinary teams, applies software standards and development processes, and may work with C/C++, RTOS platforms, Agile practices, MBSE, and AI prompting.

Develops, tests, debugs, documents, and supports software for a classified geospatial intelligence mission. Responsibilities include software requirements verification, Scrum-based development, operational support, documentation, and resolving software capability issues. The role requires hands-on Java and/or TypeScript/Angular expertise and may involve technologies such as Kubernetes, Docker, Spring, REST/SOAP services, and CI/CD tools.

Develop, test, document, and debug software for space-domain and mission applications. Build functionality involving operational planning, sensor optimization, and satellite constellation management. Use containerized cloud environments, CI/CD pipelines, Agile practices, and automation-first development. Responsibilities may include technical leadership, architecture, SRE activities, monitoring, incident management, optimization, and maintaining software quality standards. The role requires a current Top Secret clearance and eligibility for Top Secret/SCI access.

Develops missile defense software across the full engineering lifecycle, including requirements analysis, object-oriented design, coding, unit testing, integration, formal testing, documentation, and debugging. Uses C or C++ and embedded software/hardware knowledge while following development standards and processes. The role requires U.S. citizenship, a Final Secret clearance before starting, and up to 5% travel to Huntsville.

Develops, tests, debugs, documents, and integrates software throughout the engineering lifecycle. Performs requirements analysis, object-oriented design, coding, unit testing, integration, formal test support, error correction, and software documentation. Applies programming standards and tools to solve business or mission problems. Collaborates with teams and supports embedded software and hardware development.

Lead software architecture and dependencies for space vehicle and payload flight software. Manage Agile epics and stories, support project roadmaps, approve architectural changes, and oversee requirements flowdown, integration, and testing across software products. The role requires delivering complex engineering initiatives, making technical trade-offs, communicating decisions, and programming in Python or C/C++.

Develops, tests, documents, integrates, and debugs software throughout the full software development lifecycle. Responsibilities include requirements analysis, object-oriented design, coding, unit testing, integration, formal testing, documentation, and resolving software issues. The role requires C or C++ programming, collaboration with multidisciplinary teams, and compliance with software standards. Desired experience includes RTOS platforms such as Green Hills or VxWorks, Agile development, MBSE, and software requirements engineering.

Develops, documents, tests, debugs, integrates, and delivers software across the full lifecycle. Responsibilities include requirements analysis, object-oriented design, coding, unit testing, formal testing support, documentation, error correction, and adherence to software standards. The role collaborates with multidisciplinary teams and may apply Agile development and Model-Based Systems Engineering practices to mission-focused software programs.

Develop and test Java, C++, and C# software for cross-domain military solutions in a Red Hat Linux and SELinux environment. Responsibilities include policy development, message parsing, XML schemas, network protocol integration, shell scripting, CI/CD, automated testing, and Agile collaboration. The role requires strong Linux and networking knowledge and may involve customer-site installations or training. A DoD Interim Secret clearance is required.

Develop high-performance C++ simulations of space-based payload processing for OPIR missile-warning data. Translate FPGA algorithms into equivalent x86/Linux implementations, model processing pipelines, validate CPU and FPGA outputs, support software- and hardware-in-the-loop testing, analyze mission data, troubleshoot discrepancies, optimize computationally intensive software, and document algorithms and test results.