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

Build and integrate reusable React.js UI components from wireframes, optimize front-end performance and responsiveness, ensure cross-browser compatibility, validate inputs, consume REST APIs, write tests, document code, and collaborate with designers and backend engineers to deliver accessible, secure, and scalable front-end applications.

Bridge business, product, and engineering to define requirements and user stories for API-driven financial platforms. Design digital onboarding, account maintenance, and money-movement workflows, validate integrations and data flows, perform functional testing and edge-case analysis, and ensure solutions meet regulatory, risk, and legal requirements while collaborating with Product, Engineering, and Design teams.

Design, develop, and maintain automated test suites and execute manual testing. Train squads on test management, collaborate to improve test coverage and application health, and troubleshoot data and web service issues to ensure release readiness.

Lead design strategy and discovery for a retail modernization initiative, defining visual and interaction language for quoting, search, inventory, and payments. Create a modular design system bridging modern aesthetics with API-driven architectures and legacy data. Ensure device-agnostic UX across mobile, tablet, and POS, align design with technical constraints, drive accessibility/usability standards, and communicate a long-term platform vision for multi-vertical expansion.

Lead design and delivery of Node.js/TypeScript domain-driven microservices and public APIs. Architect greenfield systems, set API standards, own production readiness and incident triage, mentor engineers, and collaborate across teams to ship scalable, observable, and secure customer-facing services.

Own performance testing strategy and execution for large-scale B2B/B2C web platforms. Lead and mentor a performance testing team, translate non-functional requirements into performance goals, design and script tests using k6 and JavaScript, analyze results, and collaborate with architects, developers, and DevOps to resolve bottlenecks while acting as the primary customer performance contact.

Lead end-to-end requirements gathering, translate business goals into functional/non-functional requirements and user stories, analyze processes and data, create dashboards and KPIs, manage stakeholders and Agile delivery, support testing and UAT, and maintain comprehensive documentation to ensure solutions meet business and compliance objectives.

Design, build, and maintain scalable backend services in Java (Spring) and Python (Django/FastAPI). Implement REST/GraphQL APIs, optimize SQL and NoSQL databases, develop microservices, ensure security (OAuth2/JWT), write tests, improve performance, and collaborate with frontend and DevOps teams in Agile processes.

Lead end-to-end delivery of multi-year retail banking transformation programs. Own roadmaps, break down initiatives, coordinate cross-functional teams, track progress, mitigate risks, and communicate status to stakeholders. Operate independently in ambiguous environments to resolve gaps and ensure program alignment and timely delivery.

Build and maintain server-side logic, databases, and AWS cloud integrations using Python and Java. Design scalable APIs, optimize performance and security, implement cloud-native architectures, and produce technical documentation for high-availability, distributed systems.