We are seeking an experienced Software Engineer to support the development and maintenance of robust, scalable web applications across both front-end and back-end technologies. You will collaborate with cross-functional teams to design and implement complex features, APIs, and database structures, ensuring high standards of code quality, performance, and security. 

You Will:

• Lead the end-to-end development and maintenance of robust, scalable, and high-performance web applications, working across both front-end and back-end technologies.
• Collaborate closely with cross-functional teams—including UX/UI designers, front-end developers, system architects, and QA—to ensure seamless integration of user interfaces, backend services, and comprehensive test plans.
• Design and implement complex features, database structures, and APIs, ensuring code quality, security, efficiency, and maintainability.
• Write clean, maintainable, and well-documented code following coding standards and best practices.
• Optimize application performance through profiling, code optimization, and caching techniques.
• Conduct code reviews, provide constructive feedback, and participate in Agile methodologies such as sprint planning, task estimation, and progress tracking.
• Troubleshoot and resolve technical issues, identify gaps and technical debt, and develop strategies for incremental improvement.
• Stay current with emerging technologies and propose solutions to enhance system functionality, performance, and scalability.
• Participate in deployment and hosting processes, including CI/CD pipelines, cloud platforms, and containerization technologies.

You Have:

• 3+ years’ experience in both front-end and back-end web development.
• Proficiency in front-end technologies: HTML5, CSS3, JavaScript, and modern frameworks (React, Vue.js).
• Strong expertise in server-side technologies (such as PHP), RESTful API development, and both SQL and NoSQL databases.
• Proven track record of architecting, developing, and maintaining scalable and efficient applications.
• Mastery of version control systems (e.g., Git), collaborative workflows (feature branching, rebase), and experience with CI/CD pipelines.
• Familiarity with containerization technologies (Docker) and deployment/hosting environments (AWS, Azure).
• Experience in collaborating on code reviews, knowledge sharing, and Agile development practices.
• Ability to work independently, identify and resolve technical issues, and drive continuous improvement.

Nice to Haves:

• Experience with cloud platforms (AWS, Azure) and serverless architectures.
• Familiarity with GraphQL and alternative API technologies.
• Understanding of microservices architecture and tools such as Kubernetes.
• Contributions to open-source projects or active participation in technical communities.

What We Offer: 

• Global maternity and parental leave 
• Competitive benefits packages
• Vacation, compassionate leave, wellness days, and flex days
• Access to online services for families and new parents
• 13 affinity groups
• Internal learning and development programs
• Enterprise-wide employee discounts 

The Talent Team at Critical Mass is focused on ensuring we provide the best training, onboarding, and employee experience possible!  Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.

Critical Mass is an equal opportunity employer. 

The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.

If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoidIf Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.htmlIf U.K. based: https://www.gov.uk/consumer-protection-rightsIf Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx