Senior Developer

Job Description

Critical Mass is 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. The ideal candidate is a problem-solver with strong experience in workflow design, SharePoint integration, and client collaboration.

The role involves:

• Building and maintaining React.js front-end components in SharePoint Online (SPFx)
• Designing and implementing Power Automate workflows involving multi-step logic, approvals, and error handling
• Integrating Power Automate flows with SharePoint, Teams, Outlook, and external APIs
• Managing flow reliability, environment constraints, and compliance boundaries
• Collaborating with cross-functional teams in Kanban/Scrum models
• Documenting processes and participating in QA and deployment activities

Requirements:

• 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 Critical Mass offers:

• 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

Critical Mass values its employees and offers competitive compensation and benefits packages. The company expects its team to work from an office a minimum of 3 days a week.