Sr Software Engineer - ReactJS, Typescript & CSS

Scope:

BY Portal is the front door for multiple products. It’s a TypeScript/React micro-frontend environment backed by a fleet of Node.js/Express
services behind an API gateway
The role requires both hands-on development and architectural leadership, ensuring scalable and future-ready implementations inside an gile structure following a CI/CD pipeline
The individual will be responsible for end-to-end solution design, module implementation, and technical governance across all the repositories used by Portal. Besides this, candidate must ensure a correct collaboration with multiple stakeholders across the globe
The position involves enabling automation, process optimization, and platform innovation while guiding stakeholders and junior team members.

Technical Environment:

Frontend: TypeScript, React, MUI4/5, shadcn, Tailwind, Storybook, MFEs (iframe and module federation).
Services: Node.js, Express (some Nest), REST APIs, webhooks, async jobs where it fits.
v8, schema design, indexing, migrations, some Postgres/Snowflake.
CI/CD: GitHub Actions, environment protections, SBOM, CodeQL/SAST, automated rollbacks.
Runtime: containers on Azure Kubernetes via an internal Blue Yonder platform.
Observability: OpenTelemetry, ELK/Kibana, Azure App Insights, actionable alerting.
Testing: Jest/Vitest, contract testing, WebdriverIO + Sauce (E2E and visual), BlazeMeter for PSR.
Delivery: feature flags, gradual rollouts, canary and blue/green.

What you’ll do:

Design & Architect
- Design, develop, and maintain scalable, responsive, and user-friendly front-end applications using React and TypeScript.
- Translate business and ITIL requirements into robust Portal designs.
- Establish coding standards, reusability patterns, and best practices.
- Build a resilient test strategy: unit and contract tests, reliable E2E, visual baselines, PSR gates in CI.
- Partner with PM and Design to slice work by customer value and measure impact after release.
Develop & Deliver
- Build a resilient test strategy: unit and contract tests, reliable E2E, visual baselines, PSR gates in CI
- Configure workflows, catalog items, client/server scripts, UI policies, and business rules.
- Build and support complex integrations with enterprise systems.
- Develop automation solutions using Flow Designer, IntegrationHub, and Orchestration.
- Be a CSS wizard inside the team: deep knowledge of cutting end technologies like Tailwind, headless components, AI generated UI and Radix. We don't only want our product to works smoothly but to look amazing.
Guide & Govern
- Provide technical leadership to developers and consultants.
- Lead blameless incident reviews. Fix root causes and land durable guardrails.
- Review solutions for scalability, maintainability, and performance optimization.
- Lead technical workshops and design sessions with stakeholders.
- Coach engineers across time zones. Pair often, give crisp reviews, and turn hard problems into teachable moments.
Operate & Optimize
- Ship production code weekly across Portal MFEs (TypeScript/React) and Node.js/Express services.
- Maintain and evolve REST APIs: clear contracts, versioning, idempotency, safe rollouts, and deprecation plans.
- Maintain performance end-to-end: Core Web Vitals in the browser, p95/p99latency and throughput on services
- Maintain MongoDB Atlas performance: pragmatic schema and index design, query shaping, migrations, TTL, performance diagnostics.
- Strengthen CI/CD: reusable GitHub Actions, environment protections, SBOM, CodeQL/SAST, quality gates
- Ensure platform stability during upgrades and releases.
- Implement monitoring, performance tuning, and operational best practices.
- Contribute to governance, compliance, and platform roadmaps.

What we are looking for:

Bachelor's degree in Computer Science, Information Systems, or equivalent experience.
5+ years of professional work experience.
Experience with automated testing teschnologies
Advanced CSS expertise including modern layout techniques, animations, transitions, and responsive design approaches.
Proved experience working with CSS at the most granular level
Experience with Tailwind, Radix, Headless UI component and composition patterns
Experience developing intelligent, Agentic user interfaces that leverage AI/ML capabilities to enhance user experience.
Experience with Agile development (Scrum, XM, or Kanban).
Experience with DevOps methodologies.
Proficient in developing distributed applications on platforms like Azure, AWS, or GCP.
Proficient with Git and version control tools.
Familiarity with design patterns and build tools (npm, Yarn, Gradle).
Proficiency in React.js and related tools such as Redux, Context API, or React Query.
Strong understanding of Node.js, including building RESTful APIs or GraphQL services.
Experience with building and maintaining CI/CD pipelines, particularly with GitHub Actions.

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:

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.

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