Top Senior Level Front-End Developer Jobs in Denver & Boulder, CO

Design, develop, and deliver highly available, secure web applications and services. Innovate architecture, mentor team members, ensure system security, and collaborate in an Agile environment.

Design, develop, and deliver highly available, scalable, secure web applications and services. Mentor team members, innovate architecture, and ensure security of systems and data. Work in Agile environment to achieve goals.

Seeking a Senior Software Engineer with Java expertise to lead the design, development, and maintenance of APIs for web and mobile applications. Responsibilities include system design, development, integration, performance optimization, documentation, testing, monitoring, versioning, security implementation, and mentorship. Bachelor's degree in Computer Science or related field and 5+ years of API experience required.

Designs, develops, and maintains software solutions for BillGO's Bill Pay products. Collaborates with cross-functional teams to deliver features and improvements. Responsible for code design, implementation, maintenance, and monitoring. Stays updated on latest technologies and proposes process improvements. Ensures compliance with regulatory requirements and industry standards. Mentors junior developers and new team members.

Lead technical direction of self-custody product, focusing on cryptographic primitives for multi-signature wallet. Design, build, deploy secure services supporting wallet, assess risks, communicate clearly, collaborate across teams, and own testing and maintenance.

As a Principal Front-end Software Engineer on the Web team, you will share ownership in Square's Dashboard web application, establish best practices with React, prioritize tooling investments, advocate for architectural tradeoffs, drive process improvements, and mentor engineers.