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

Hands-on internship offering cross-functional exposure to consulting, marketing, HR, operations, sales, partnerships, events, and content. Interns receive mentorship, structured development, real responsibility, and potential consideration for future roles.

Remote unpaid 5–6 month internship producing blog, website, newsletter, and social media content. Researches topics, drafts marketing copy and product descriptions, edits and proofreads for consistency, collaborates on content ideas, and tracks trends to improve engagement while gaining mentorship and portfolio pieces.

Manage financial transactions and ledgers, reconcile bank accounts, process accounts payable/receivable, generate financial reports, assist with budgeting and forecasting, ensure compliance with tax and financial policies, coordinate with external accountants, and maintain organized financial records.

Build and own core payment infrastructure and APIs end-to-end using full-stack skills. Design robust asynchronous systems and state machines (queuing, scheduling, webhooks), collaborate with CTO, BD, and customers to shape product, and set engineering standards and best practices as an early hire.

Lead design, deployment, and operation of Caldera's blockchain infrastructure. Build and expand DevOps pipelines, manage Kubernetes/AWS deployments, implement IaC (Terraform/Helm), enhance observability, optimize performance, and maintain infrastructure security for production rollup chains.

Remote, unpaid 6-month UI/UX internship (20 hrs/week) supporting the Marketing team: create wireframes, prototypes, high-fidelity designs, conduct user research and usability testing, maintain design systems, collaborate cross-functionally, iterate based on feedback, and support product strategy while meeting deadlines.

Lead cross-functional social growth projects from concept to launch across Facebook, Instagram, TikTok, YouTube and X. Build workflows, documentation and reporting, create platform-native strategies and content, develop video concepts and briefs, run tests and analyze performance, and scale successful formats into repeatable systems while coordinating teams and reducing executive-level project chasing.

On-site HPC Linux software engineer supporting modeling and simulation workflows: develop and maintain multi-platform Linux software, debug and analyze codebases, apply SDLC practices, unit test and manage configurations, conduct code reviews, mentor junior staff, and design/deliver training and onboarding for HPC users.

Lead strategic business development focused on USAF modernization and sustainment. Shape requirements, build high-value contract vehicles, engage senior Air Force leaders, execute pipeline and market-shaping campaigns, and drive adoption of advanced manufacturing capabilities across procurement lifecycles.

Lead enterprise franchise sales for a designated region: manage full sales cycle, cultivate relationships, negotiate and close deals, collaborate with brand and support teams, meet annual quotas, and travel ~50%.