Top Software Engineer Jobs in Denver & Boulder, CO

Design, build, deploy, and maintain full-stack applications spanning frontend interfaces, backend services, APIs, databases, integrations, and cloud infrastructure. Own complex systems, improve reliability and technical debt, make architectural decisions, mentor engineers, and contribute to code reviews and engineering practices. Evaluate AI-assisted development opportunities and collaborate with product teams, stakeholders, and customers to deliver secure, maintainable software capabilities.

Senior engineer responsible for designing, building, and operating scalable data ingestion, processing, storage, and member-facing membership application. Drive architecture decisions, mentor engineers, build data pipelines, APIs, and ensure reliability, observability, CI/CD, and documentation while partnering with product and analytics stakeholders.

Develops, configures, tests, documents, and supports business applications used in clinical trials. Responsibilities include writing C# and database code, modifying application and database components, diagnosing defects, performing unit testing, deploying fixes, supporting study configurations, and maintaining source-control and change-control practices. The role collaborates with project and solution teams, communicates progress to stakeholders, and follows SDLC standards, SOPs, Good Clinical Practice, 21 CFR Part 11, and other regulations.

Develop and maintain backend services and APIs for Twilio’s communications platform. Responsibilities include designing, deploying, operating, and reviewing software, supporting production operations and on-call rotations, collaborating with a small engineering team, and writing technical documentation. The role requires Go or Java experience and values familiarity with DynamoDB, AWS, Docker, Kubernetes, and Temporal.

Build and maintain automation systems for package creation, testing, and container image generation. Develop Go-based CLI tools, services, integrations, and AI-powered pipelines for manifest generation, test scaffolding, validation, and quality gates. Contribute to scalable systems design, roadmap planning, and developer tooling while collaborating with distributed teams. The role focuses on improving reliability and reducing manual intervention across Chainguard’s software image factory.

Contribute to designing, developing, and operating scalable data platform infrastructure and services. Build tools that help engineering teams adopt data systems, automate infrastructure operations, improve reliability and performance, and apply GenAI to developer and operator experiences. Collaborate across engineering teams, solve distributed-systems challenges, and deliver projects end-to-end with guidance from senior engineers.

Architect and deliver complex distributed systems using Azure cloud-native technologies, microservices, APIs, and event-driven patterns. Lead architecture reviews, reliability initiatives, performance optimization, incident response, and root-cause analysis. Drive adoption of AI-assisted development tools while maintaining security and code quality. Collaborate across engineering, DevOps, QA, and product teams, and mentor engineers on technical design, development practices, and AI-enabled workflows.

Build and ship frontend features for a financial marketplace using React and Next.js. Collaborate with product, design, and backend engineers; contribute to architecture, component design, code quality, tooling, and the shared component library. Own work from design through delivery, participate in pairing and code reviews, and use AI-assisted development tools thoughtfully.

Build and ship end-to-end features for Augment’s iOS app, collaborate closely with product, design, backend, and fellow iOS engineers, and contribute to architecture, code quality, tooling, and long-term product health. The role emphasizes Swift and SwiftUI development, ownership, thoughtful collaboration, feedback, and effective use of AI-assisted development tools.

Develop and improve object storage software handling S3 requests, durable storage, data placement, erasure coding, resilience, concurrency, and tiered movement across NVMe, HDD, and tape. Analyze performance and reliability on Linux, write tested code, participate in design reviews, and grow toward independent component ownership. The role requires systems-level software development experience and familiarity with distributed, networked, concurrent, and storage systems.

Lead the technical direction and hands-on development of an exabyte-scale object storage platform. Design and optimize data paths, S3 APIs, durability, erasure coding, data placement, fault tolerance, and movement across NVMe, HDD, and tape. Responsibilities include systems programming, Linux profiling, performance optimization, architecture, code reviews, testing, mentoring engineers, and collaboration on product scope and delivery.

Develop and maintain full-stack product features, REST APIs, ERP integrations, and AI document-capture capabilities for NG and SMRTR TRAC. Work with Vue, TypeScript, Node.js, Scala, PostgreSQL, and MongoDB; improve reliability, performance, security, and test coverage. Translate customer and business requirements into software, estimate work, support production go-lives, troubleshoot issues, document solutions, and collaborate with engineering, sales, professional services, and customers.

Own and expand a Three.js-based in-browser solar configurator: implement and optimize 3D geometry tools and workflows, build product-facing frontend features, collaborate with backend and computational teams, translate solar physics into usable design tools, define frontend/3D architecture, and ensure performant, stable UX across edge cases.

Own and expand a Three.js/R3F in-browser solar configurator: build and optimize 3D geometry tools and UX, collaborate with backend and simulation teams, ensure performant real-time rendering, and deliver frontend product features across the Aether platform.

Design, implement, and maintain scalable serverless backend services and responsive Next.js front-end components. Build data scrapers and integrations, improve CI/CD and IaC, mentor junior engineers, and collaborate with product and clients to solve complex compliance problems.

Principal Software Engineer responsible for designing, developing, supporting, and improving enterprise software platforms. The role leads technical decisions, architecture, infrastructure, quality standards, and cross-functional implementation; mentors developers; evaluates technologies; troubleshoots complex issues; and collaborates with customers and distributed teams. Requires strong communication, enterprise development expertise, database proficiency, security knowledge, and experience with Java or .NET, Angular, RESTful APIs, and Agile practices.

Build Apollo’s AI-powered Builder Studio end to end, including chat-driven app creation, live previews, generated-app runtimes, workflows, integrations, delegated permissions, security, and reliability. The role requires strong full-stack development, production LLM experience, frontend expertise with complex UIs, backend and workflow design, and ownership of an ambiguous 0-to-1 product.

Design, develop, debug, and improve Elastic’s cloud control-plane offerings. The role involves guiding cross-team architecture, leading development best practices, creating technical plans, diagnosing complex failures, prioritizing fixes and features, and collaborating with Support and Elasticsearch engineering teams. The engineer will contribute to reliable, scalable SaaS foundations while providing pragmatic technical leadership across a distributed engineering organization.

Build and maintain Turso’s open-source database and cloud platform. Responsibilities include advancing PostgreSQL compatibility, ensuring software correctness through testing and verification, operating cloud APIs and data planes, and scaling systems to support substantially more databases. The role involves Rust development, embedded database technology, large-scale cloud operations, observability, reliability, performance improvements, and collaboration with customers, open-source communities, and distributed teams.

Develops, enhances, tests, debugs, and maintains front-end and back-end software for mission-critical defense radar systems. Designs GUIs, desktop and web applications, autonomous services, scripts, and utilities; collaborates with system and business analysts; resolves software issues; coordinates enhancements and bug fixes; and ensures software standards are met.

Develop, test, document, maintain, and integrate software applications supporting business needs. Responsibilities include writing clean code, fixing bugs, improving performance, troubleshooting, documenting systems, collaborating with engineers and business analysts, and participating in agile development processes.

Designs, develops, tests, operates, and maintains mainframe software using COBOL, DB2, JCL, and VSAM. Responsibilities include full-stack ownership, architectural design, production-ready coding, code reviews, failure analysis, reliability improvements, compliance, security, and collaboration within an agile and DevOps environment. Requires solving technical problems, communicating with product stakeholders, and delivering scalable, reliable software that supports customer experience and banking technology transformation.

Designs, develops, tests, operates, and maintains mainframe software using COBOL, DB2, JCL, and VSAM. Owns production-ready code, participates in code reviews, analyzes failures, and applies scalable, reliable architectural practices. Collaborates with engineering teams, product owners, scrum masters, vendors, and customers within an Agile and DevOps environment. Ensures compliance, security, software reliability, and continuous improvement while delivering incremental features.

Build and operate distributed backend services and APIs for Airbnb’s global AirCover insurance platform. Develop policy, coverage, enrollment, and regional-rule capabilities; translate product and regulatory requirements into reliable code; and support experimentation, analytics, monitoring, and data protection. Collaborate with Product, Design, Data Science, Legal, infrastructure, security, and privacy teams. Participate in technical design, code reviews, on-call rotations, and ongoing reliability improvements.

Build and evolve Fetch’s backend data platform, including pipelines, governed data access, delivery infrastructure, and partner integrations. Own ambiguous technical problems, lead cross-system initiatives and migrations, improve reliability and engineering efficiency, shape technical direction, collaborate across teams, and mentor engineers. The role requires strong platform engineering judgment, scalable systems experience, operational awareness, and the ability to influence stakeholders in an evolving environment.