Top Software Engineer Jobs in Denver & Boulder, CO

Develop and test Java-based C2BMC missile defense applications across the full software development lifecycle. Responsibilities include architecture and requirements development, design artifacts, coding, reviews, integration and testing, agile execution, issue resolution, and performance optimization. The role also involves collaborating with industry partners, documenting test activities, deploying integration processes, and mentoring junior engineers. Work is fully onsite in Colorado Springs or Huntsville and requires an active U.S. Secret clearance.

Develops, integrates, tests, maintains, and supports Java-based software systems and mathematical algorithms for Boeing’s C2BMC missile defense applications. Responsibilities include software architecture, requirements decomposition, interface development, design documentation, coding, debugging, performance optimization, agile execution, integration and testing, operational support, and technical issue resolution. The role collaborates with systems engineering, integration and test teams, and industry partners while supporting full software lifecycle activities for ballistic missile defense systems.

Build and scale Go backend services for agent quoting, configuration, and application submission. Design APIs and distributed systems, write unit and integration tests, resolve partner-specific issues, contribute to architecture, support production debugging, improve CI/CD automation, and use AI coding tools in daily engineering workflows. Collaborate with adjacent teams and mentor teammates through pairing and documentation.

Build and operate a stablecoin payment rail for merchant checkout, subscriptions, refunds, reconciliation, and onchain settlement. Deliver full-stack features across Go services and React/Next.js interfaces, including APIs, protobufs, database migrations, wallet connectivity, and durable Temporal workflows. Improve accessibility, conversion, performance, and observability through logs, metrics, and traces. Participate in on-call rotations and collaborate cross-functionally to integrate Payment Acceptance into Coinbase’s developer platform.

Own the specification, design, and implementation of features for FareHarbor’s large-scale web application. Collaborate with product team members, develop scalable and performant full-stack solutions, improve automated testing, resolve technical challenges, and participate in code reviews. The role requires strong Python and JavaScript skills, experience with front-end and back-end frameworks, relational databases, performance optimization, and agile development.

Contribute to full-stack features for spacecraft mission control and distributed ground control systems. Build React/TypeScript frontends and Elixir backend services, write maintainable and testable code, collaborate with operators, designers, and engineering specialists, and participate in design and code reviews. The role involves smaller, well-defined tasks under senior guidance during a three-month temporary engagement with potential conversion.

Develop and test flight software for spacecraft computers, integrate GNC algorithms, maintain command telemetry databases, support command scripting, build subsystem simulators, and create device drivers and communications libraries. The role involves embedded RTOS development, hardware integration, mission testing, and collaboration with ground-control software teams. This is a three-month onsite temporary engagement in Denver or Long Beach, with potential conversion to regular employment.

Develop and maintain modern C++ spacecraft simulation software and multi-physics libraries. Model spacecraft dynamics, thermal systems, attitude control, propulsion, power, sensors, and actuators; implement numerical solvers and time-stepping algorithms; maintain Python and C++ APIs; and collaborate on mission planning, algorithm development, testing, code reviews, and sprint planning.

Develop and maintain web-based applications across the full stack, including feature development, bug fixing, testing, debugging, documentation, and code reviews. Collaborate within an Agile team, research emerging technologies, troubleshoot operating systems, databases, applications, JavaScript, and networks, and contribute to process improvements. The role also includes mentoring teammates and delivering technical training.

Develop and optimize high-scale Adobe Commerce ecommerce platforms using PHP, JavaScript, Node.js, GraphQL, REST, and MySQL. Separate business logic from presentation layers, improve database and caching performance, build CI/CD validation, monitor production systems with New Relic, and create endurance load tests. Integrate identity, payment, and tax systems while mentoring junior engineers and leading offshore teams.

As a Principal Flight Software Engineer, you will lead the architecture and development of flight software for space missions, ensuring safety and reliability while collaborating on technical decisions and standards.

As a Staff Flight Software Engineer, you will assist in the software development cycle, integrate GNC algorithms, maintain command telemetry databases, and develop reusable driver libraries for flight hardware.

Lead a team of software engineers supporting critical retail-banking applications. Design and develop software solutions, provide technical guidance, review code and documentation, troubleshoot complex incidents, and apply SRE practices. Maintain on-call rotation for after-hours critical incidents. Use OpenShift, Hogan, Dynatrace, and Linux; collaborate on releases and modernize application delivery.

Design and implement secure, scalable backend services for voice agents, integrate AI models and telephony, improve inference, debug concurrent systems, and collaborate with Product to deliver features end-to-end.

Leads the architecture, design, development, integration, verification, and testing of complex software and multidisciplinary space systems. Responsibilities include managing system requirements and architectures, defining operational concepts, leading milestone reviews, mitigating technical risks, improving engineering processes, and mentoring software engineers. The role requires advanced software engineering expertise, scalable system design, algorithmic knowledge, technical leadership, and an active Top Secret clearance.

Build and independently deliver full-stack healthcare software features using Java or Groovy, React and TypeScript, MongoDB, and Kafka. Responsibilities include design, implementation, testing, deployment, production debugging, code reviews, design documentation, dependency coordination, process improvements, and mentoring. The role requires reliable delivery with minimal oversight and collaboration across engineering, product, and QA teams in a remote-first environment.

Develop and ship full-stack web and mobile experiences across Affirm’s consumer app and website. Collaborate with product, design, analytics, and engineering teams to break down projects, make technical decisions, write tested and extensible code, launch scalable APIs, monitor service health, support on-call operations, review code, and participate in team development and interviewing.

Build and scale consumer-facing mobile and web applications and backend services. Own features end-to-end across frontend and backend, optimize databases and queries, integrate third-party APIs, implement algorithms for risk and transaction evaluation, improve reliability and CI/CD, and contribute to testing, monitoring, and internal tools to support customer operations.

Develop and improve MongoDB’s distributed database networking and observability components. Responsibilities include writing production-level C++ code, enhancing performance, availability, scalability, and resource efficiency, integrating observability frameworks, leading medium-sized projects, collaborating across the product lifecycle, and participating in code reviews and technical design. The role requires strong software architecture fundamentals and an interest in networking, observability, and computer systems internals.

Designs, develops, tests, and architects complex flight software for space systems. Responsibilities include writing maintainable code, collaborating on requirements, managing changes with version control, conducting code reviews, troubleshooting issues, documenting processes, and mentoring engineers. The role also provides technical leadership and contributes to innovative mission, spacecraft, and payload-control software solutions.

Own performance optimization, reliability, observability, capacity modeling, and automated failover for Coinbase’s blockchain node infrastructure. Diagnose resource bottlenecks, reduce infrastructure costs, define SLOs and SLIs, support protocol upgrades, and improve node performance across distributed systems at scale. Collaborate with protocol integration, wallet, and indexer teams while applying backend programming and systems profiling expertise.

Lead architecture and technical direction for FreeWheel’s high-throughput Buyer Cloud Ad Serving platform. Design scalable, low-latency distributed backend services; optimize performance; drive reliability, observability, and cloud-native adoption; establish engineering standards; collaborate across Product, Infrastructure, SRE, and Data Engineering; and mentor engineers. The role requires operating production systems processing billions of auctions and potentially millions of requests per second, with occasional nights and weekends as needed.

Build, deploy, and operate scalable, fault-tolerant software products and tools used by millions of consumers. Design solutions, decompose complex requirements, leverage AWS and AI technologies, contribute to CI/CD, write tests, review code, and maintain observability, reliability, security, and cost efficiency. Lead technical initiatives, mentor engineers, and own solutions throughout the production lifecycle.

Develops real-time space vehicle simulations supporting flight software testing, ground system development, mission operations, and training. Responsibilities span requirements, architecture, coding, testing, integration, and documentation within an Agile and DevSecOps environment. The role involves hardware-software integration and exposure to containers, messaging protocols, high-performance data architectures, networking, model-based simulation, real-time operating systems, and hardware- or processor-in-the-loop testing.

Develop and maintain embedded satellite software, including command and control, mission planning, data analysis, and test infrastructure. Perform full software lifecycle activities from requirements and architecture through coding, testing, integration, documentation, and support. The role requires collaboration across teams, formal development practices, object-oriented design, UML modeling, and experience with cloud, web, database, and high-level programming technologies. Work is on-site five days per week and requires an active TS/SCI clearance.