Senior Developer

We are seeking a Senior React + Power Automate Developer to support AT&T's internal SharePoint platforms. This dual-skilled role focuses on developing front-end components in React.js and building workflow automation using Power Automate within the Microsoft ecosystem.

This position requires a problem-solver with strong experience in workflow design, SharePoint integration, and client collaboration.

You will

• Build and maintain React.js front-end components in SharePoint Online (SPFx)
• Design and implement Power Automate workflows involving multi-step logic, approvals, and error
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• Integrate Power Automate flows with SharePoint, Teams, Outlook, and external APIs
• Manage flow reliability, environment constraints, and compliance boundaries
• Collaborate with cross-functional teams in Kanban/Scrum models
• Document processes and participate in QA and deployment activities

You have

• Advanced English level (At least B2+)
• 5+ years of combined front-end and workflow automation experience
• Strong skills in React.js, JavaScript/TypeScript, and SharePoint integration
• Advanced knowledge of Power Automate (Microsoft Flow)
• Familiarity with REST APIs, environment management, and flow optimization
• Strong communication skills and ability to work with globally distributed teams
• Exposure to Azure Functions and Python scripting
• Understanding of SharePoint architecture and permissions
• Experience with Agile tools such as Azure DevOps or JIRA
• Awareness of manual deployment workflows and platform limitations

What We Offer:

• Maternity and parental leave extra days
• Competitive benefits packages
• Vacation, compassionate leave, sick days, and flex days
• Access to online services for families and new parents
• Diversity and Inclusion Board with 12 affinity groups
• Internal learning and development programs
• Enterprise-wide employee discounts
• And more…

At Critical Mass, we value our employees and offer competitive compensation and benefits packages.  If you’re looking for a challenging and rewarding opportunity to make a significant impact on the lives of our employees, we encourage you to apply for this exciting position today!

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 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#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx