Technical Architect Cloud - React L3 Support

• Overview:

• We are seeking an experienced

Senior UI / Full-Stack Sustaining Engineer

with 7–8 years of hands-on experience in

ReactJS and Node.js

. In this role, you will be the core technical escalation point responsible for investigating, debugging, and resolving complex, customer-reported frontend and middleware issues in production environments.

• What you will do:

• Customer Issue Triage & Root Cause Analysis: Investigate, reproduce, and resolve critical production defects and performance bottlenecks reported by enterprise customers across UI layers and Node.js backends.

• Code Remediation & Hotfixing: Author clean, maintainable bug fixes, patches, and hotfixes with minimal turnaround time while ensuring zero regression.

• Live Production Debugging: Utilize browser developer tools, network analyzers, APM tracing tools, and server-side log analytics to isolate issues in real time.

• Cross-Functional Collaboration: Partner closely with  core product engineering, QA, and Site Reliability Engineering (SRE) teams to drive issues to resolution.

• Documentation & Prevention: Document Root Cause Analyses (RCAs), author technical troubleshooting runbooks, and provide feedback to core product teams to prevent recurring defects.

• Shift Operations: Actively participate in a

24/7 rotational shift model

, ensuring SLA compliance for high-priority incidents (Sev-1 / Sev-2).

• What we are looking for:

• Frontend Mastery: 6+ years of strong experience in

ReactJS

, JavaScript (ES6+), TypeScript, HTML5, CSS3, and state management libraries (Redux, Zustand, Context API).

• Backend / Middleware: 3+ years of experience with

Node.js

and Express/NestJS, including RESTful API integration, asynchronous programming, and middleware architectures.

• Advanced Debugging: Deep proficiency in Chrome DevTools (Performance, Memory Profiler, Network), React DevTools, and error-tracking tools (Sentry, LogRocket, or Datadog).

• Observability & Logging: Hands-on experience querying application logs and metrics using tools such as Splunk, Kibana, Grafana, or CloudWatch.

• Version Control & CI/CD: Strong knowledge of Git workflows, branching strategies, and CI/CD pipelines (GitHub Actions, Jenkins, or GitLab CI).

• Qualifications & Shift Requirements:

• Experience: 7 to 8 years in frontend/full-stack development or sustaining engineering/L3 support.

• Education: Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related engineering field.

• Shift Readiness:

Mandatory flexibility to work in a rotating 24/7 shift schedule

(including day, swing, night, and weekend shifts).

• Communication: Excellent written and verbal English communication skills, with experience writing crisp technical RCAs and communicating with global customer-facing

Our Values

If you want to know the heart of a company, take a look at their values. Ours unite us. They are what drive our success – and the success of our customers. Does your heart beat like ours

• Find out here: https://blueyonder.com/about/core-values Core Values

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status.