Top Tech Jobs & Startup Jobs in Denver & Boulder, CO

Join as a full-stack software engineer to design, develop, and maintain web applications and services. Collaborate cross-functionally, write clean code, perform code reviews, debug issues, and stay current with industry trends.

Internship role to design and implement automated testing using low-code/no-code platforms. Create, maintain, and run automated test cases, document and track defects, produce test plans and reports, improve test coverage, and communicate progress with clients and teams. Involves end-to-end responsibility from planning through deployment and incorporation of feedback.

The role involves creating and publishing daily social media content targeting Korean students preparing for TOEFL, using performance metrics for improvement.

Own the technical side of deal progression for airline deployments: qualify opportunities, run demos and POCs, author integration and deployment architectures (PSS, APIs, data feeds, DNS, identity, networking), respond to RFPs/security questionnaires, scope SOWs and NFRs, and build reusable demo/reference assets to drive adoption and expansion while liaising between sales, engineering, and customers.

You will execute and improve insurance workflows, analyze operational efficiency, collaborate with product teams, and support onboarding and documentation efforts.

Sell and onboard Part 135 charter operators in the Northeast, owning full sales cycle from prospecting to implementation, managing pipeline and forecasts, driving new client acquisition and expansion, and supporting adoption and product feedback.

Partner with small-business clients to manage full-cycle recruiting: source, screen, interview, and hire candidates. Collaborate with hiring managers, document recruiting plans and timelines, coordinate interviews and offers, and provide consultative recruiting and HR support on a fractional, part-time basis.

Review, label, and QA datasets for AI/ML training; maintain trackers, databases, and dashboards; follow annotation guidelines and SOPs; prepare and clean data; document processes; collaborate to resolve data queries while ensuring confidentiality and timely delivery.

As a founding full-stack engineer, design, build, and deploy core backend services, oracle/watchtower infrastructure, and borrower-facing applications. Integrate Bitcoin transactions, PSBTs, and Discreet Log Contracts, manage SQL/NoSQL databases, contribute to architecture decisions, and wear multiple hats in a fast-paced, early-stage environment.

First engineering hire to build end-to-end features across React frontends and C#/.NET (and Python) backends, work with PostgreSQL and MongoDB, integrate third-party automotive APIs, use agentic AI coding tools, and collaborate on architecture and engineering culture.