Top Backend Engineer Jobs in Denver & Boulder, CO

TextUs is seeking a Senior Backend Software Engineer with expertise in Ruby on Rails to help build applications. The role requires developing production APIs, reviewing documentation, managing tech debt, and collaborating with the team. Responsibilities include mentoring junior developers, maintaining CI/CD processes, and working in a remote environment.

Design, build, and launch credit products and features for Cash App's Underwriting & Credit organization. Collaborate with cross-functional teams and work on impactful projects. Mentor fellow engineers and contribute to development capabilities.

Cloudflare is looking for a backend engineer to help us build and maintain the codebase that powers both our customer APIs as well as internal service APIs. This is a role for engineers that are familiar with web backend architecture, database design, and interaction. The role requires proficiency in RESTful API design, knowledge of SQL and common relational database systems, and experience with backend web frameworks. The ideal candidate should have a minimum of 5 years of experience building large-scale software applications. Strong debugging and optimization skills, unit/integration testing experience, and familiarity with containers are also desirable.

Seeking a Staff Back-End Engineer with 8+ years of experience in writing server-side APIs, building large scale distributed systems, and expertise with event-driven architecture. Must have deep knowledge of object-oriented programming and experience with various database systems. Experience with public cloud services, agile methodologies, and product-led organizations is required.

A full stack engineer position at Ardent Mills, responsible for developing and maintaining critical business applications. Requires strong problem-solving skills, knowledge of frontend web rendering processes, and experience with web frameworks like Angular, React, and VueJS.

VeilSun is seeking a Web Application Developer to code, implement and maintain web based applications. This position provides an excellent opportunity to be a key contributor to our business success. You will also help build web applications that connect systems, automate administrative tasks, track performance, incorporate information, and create insights to support strategic decisions.

Seeking a full-stack Lead Software Engineer to build web-based systems for the Breef Platform. Responsibilities include designing, developing, and maintaining web applications using React and Python, implementing new features, and ensuring high-quality product delivery. Ideal candidate has 4-6 years of full-stack development experience, familiarity with Agile methodologies, and a startup background.

As a senior software engineer at Fandango, work on back end software and services in C# and node.js, lead a team of engineers, collaborate with peers, participate in Agile ceremonies, troubleshoot and fix production issues, and mentor team members.

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.

Join BAE Systems as a Web Applications Developer to collaborate on web applications development, maintenance, customization, and support for integrated systems. Responsibilities include programming support, quality control, design, training, documentation, and database queries. Must have 3+ years of back-end development experience with C# and .Net, and an Associate's degree in Computer Science or related field.

The Full-Stack Senior Software Engineer is responsible for the design, development, and integration efforts of various applications.

The Senior Fullstack Engineer will work with React, Ruby, Rails, MongoDB, and Postgres to solve problems for customers. They will collaborate with Product Managers, Designers, and other Engineers to shape the direction of the products. The ideal candidate has at least 3 years of professional Software Engineering experience and understands SaaS business fundamentals.

In this role, you'll be helping build the new Reporting & Analytics product features in the Cloudflare Zero Trust Platform. As a software engineer on this greenfield team, you'll work across the stack to implement our Go API, build new backend features and functionality in Go, and help contribute to building new frontend analytical visualizations and functionality.

As a Senior Software Engineer, Backend at VORTO, you will help define the frontier of logistics optimization, supply prediction, and demand prediction. You will work with a small, dedicated team to develop and maintain APIs, services, and systems for managing the flow of drivers and trucks. The role requires 5+ years of experience, hands-on experience with GoLang and SQL/Postgres, and experience with Docker containers, Kubernetes, NATS, and Redis.

Vitro3D is seeking a JavaScript Developer II to work on customer-facing software for visualizing and manipulating 3D digital models. Responsibilities include developing new features, optimizing applications, and collaborating with the team. Requires 3+ years of experience in JavaScript, Node.js, HTML5, CSS3, Vue.js, and WebGL, among other skills.

Join the Professional Services team as a Full Stack Developer at a well-funded company, developing custom solutions for high value customers. Responsibilities include designing, testing, and maintaining new features, leading projects, and collaborating with client-facing teams. Requires 5+ years of experience in TypeScript, Node.js, and React.