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

Own application security for Generative AI and emerging products by integrating secure development practices, conducting design and code reviews, threat modeling systems, assessing vendors and AI tools, triaging vulnerabilities, and building security automation. The role partners with engineering and detection teams, contributes to cloud and infrastructure security, participates in incident response and on-call rotations, and documents post-incident remediation.

Own internal offensive security assessments across applications, APIs, cloud infrastructure, and corporate systems. Plan and execute penetration tests, validate vulnerabilities safely, review source code, and partner with engineering teams through remediation and retesting. Build automated security testing tools and workflows, lead adoption of AI-assisted offensive security capabilities, support third-party testing, improve detection and incident response, and participate in on-call responsibilities.

Lead complex data analysis across Liftoff’s supply-side business, using optimized SQL on large-scale datasets and BI tools to build dashboards, reporting pipelines, and actionable insights. The role conducts root-cause analysis, evaluates experiments, translates technical developments into business impact, leads cross-functional initiatives, and mentors analysts. It partners with Engineering, Product, Data Science, Finance, Commercial teams, and executive leadership to influence roadmap and operational decisions.

Manage U.S. and international corporate tax compliance, transfer pricing calculations, tax provision schedules, audits, and financial reporting alignment. Coordinate with external advisors and cross-functional Finance, Legal, and Accounting teams. Support tax projects, process improvements, system implementations, documentation, internal controls, and reporting accuracy while managing deadlines and tax department workflows.

Leads Deal Desk within Strategic Finance, owning revenue adjustments, deal economics, approval structures, financial modeling, accruals, cash-flow monitoring, and performance analysis for standard and complex commercial agreements. Partners with GTM, Finance, and senior leadership, presents recommendations, maintains approval governance, and manages a Senior Analyst. Requires strong judgment, revenue recognition knowledge, commercial finance expertise, and executive communication skills.

Manage technical accounting activities, including researching complex transactions, drafting accounting memos, maintaining policies, implementing new standards, supporting equity accounting, preparing financial statements and disclosures, and assisting audits. The role requires collaboration with Legal, FP&A, and business teams on contracts and billing structures, along with expertise in US GAAP and public accounting experience.

Design, build, and operate high-throughput, low-latency ad-serving infrastructure processing millions of requests per second. Optimize GPU-powered TensorRT inference, feature stores, model serving, benchmarking, experimentation tooling, and system reliability. Partner with machine learning engineers to productionize models and own systems through design, deployment, observability, capacity planning, incident response, and optimization.

Own the strategy, business case, experimentation roadmap, and launch of Liftoff’s zero-to-one e-commerce advertising platform. Lead product development from beta toward general availability, partnering with engineering, machine learning, legal, finance, sales, and customers. Responsibilities include optimizing funnel performance, defining traffic quality standards, managing identity and attribution architecture, overseeing e-commerce integrations, guiding go-to-market strategy, and making data-driven scaling, pivot, or shutdown decisions.

The Security Engineer will manage Liftoff's SIEM, lead the adoption of AI-augmented SOC tools, triage alerts, and improve incident response processes while collaborating on various security functions.

Design, prototype, and productionize generative AI features and agentic workflows. Build Python services, TypeScript/React UIs, data pipelines, evaluation and instrumentation, and safeguards. Partner with product and stakeholders to measure impact, ensure reliability, and mentor engineers.