// hello world

Sibiraj Rajendran

I build things that hold up -
in production and in review.

Full-stack engineer at Cisco, building across the Webex collaboration portfolio. Previously: casino gaming interfaces at Scientific Games. Frontend-strong, architecturally minded, recognized twice by Cisco's CPO.

See my workDownload resume

01. About

I'm a full-stack engineer at Cisco, working across the collaboration portfolio - wholesale UI in Angular, Meeting Server modernization in React, microservices in Node.js and Java. I also built an internal innovation platform that was adopted across Cisco's product organization and personally recognized twice by the CPO.

Before Cisco, I was at Scientific Games building iVIEW 4 - the player interfaces on casino slot machines. Loyalty points, dynamic marketing, multi-touch displays, and the occasional "you've won!" notification. Before that, DXC Technology, building lab management systems in Angular and .NET.

A growing part of my work is architectural: owning HLD/LLD for features, leading code reviews across teams, and making sure what ships is maintainable long after I've moved on. With AI accelerating how fast code is written, design thinking and review quality matter more now, not less.

I'm the person people reach out to when they're stuck. I care about code the next developer can actually work with. Based in Chennai, originally from Rasipuram, Tamil Nadu.

8+Years of experience
4Companies
B.E.Computer Science

02. Experience

Software Engineer @ Cisco

Nov 2021 - Present · Chennai

Own HLD/LLD and lead architectural decisions across Cisco's collaboration portfolio. Build wholesale UI in Angular with Java backends, modernize Meeting Server in React, develop Node.js microservices. Also built the Playtime Innovation Platform - adopted across Cisco's product organization for hackathons and innovation events.

  • Own HLD/LLD for features; lead cross-team PR reviews and architectural decisions
  • Two personal recognitions from Cisco's CPO for platform impact
  • Built Playtime innovation platform, now adopted across Cisco Product org
  • "Hidden Hero" award for CMS Web App redesign contributions
  • Reduced customer cases ~30% through Cypress automation strategy
  • Playtime Top 10% globally, Chennai Innovation 2023 runner-up
AngularReactNode.jsTypeScriptJavaNgRxRxJSSpring BootTypeORMCypressJestDockerJenkins

Senior Programmer Analyst @ Zifo

Sep 2021 - Nov 2021 · Chennai

Brief role working on enterprise R&D technology solutions before joining Cisco.

Software Engineer @ Scientific Games

Aug 2019 - Sep 2021 · Chennai

Built iVIEW 4 - the next-gen player interface for casino gaming machines. Led UI component development and state management across a 30-person project. Designed the NgRx store architecture from the ground up and established team-wide coding standards.

  • Designed NgRx store architecture, improving app stability and performance
  • Star Award (2021) for delivery quality and technical mentorship
  • Led code reviews and established team coding standards for a 30-person project
AngularReactTypeScriptNgRxReduxRxJSNode.jsSCSSSVG

Full Stack Developer @ DXC Technology

Apr 2017 - Aug 2019 · Chennai

Built LIMS - a Laboratory Information Management System for pathology labs. Full-stack work with Angular frontends and .NET APIs on a 15-person cross-functional team. Designed component architecture and data processing algorithms.

  • Hackathon runner-up for AI healthcare prototype (disease prediction)
  • Multiple Spot Awards & Kudos for consistent quality since day one
  • Designed component architecture and algorithms for the core product
AngularTypeScript.NETWeb APISQLBootstrapMaterial Design

03. Recognition

"What started as a grassroots tool, built out of a clear business need, has scaled into something truly impressive. Your collaborative spirit exemplifies what makes Cisco great."

Jeetu PatelCisco EVP & Chief Product OfficerPlaytime Innovation Platform

"The new Playtime AI Search is a game-changer, allowing us to reference and scale ideas across all organizations. This platform is now being rapidly adopted across most of the Cisco Product organization."

Ty ThorsenCisco Engineering LeadershipAI Search - Outstanding Contribution

"By making AI a core part of how you work every day, you're not just raising the bar - you're inspiring those around you to think bigger and push boundaries."

Jeetu PatelCisco EVP & Chief Product OfficerAI Challenge Success

"Sibiraj has been a real "Hidden Hero" within the CMS Web App team. I really want to recognise the impact he has had on the team and especially his contributions."

Brian MurrayCisco Meeting Server LeadershipHidden Hero - CMS Web App

"Your willingness to jump in and ramp others up while managing your own deployments shows true leadership. Thanks for going the extra mile to ensure the team succeeds."

Newton JoshuaCisco WebSquad LeadGoing the Extra Mile

"Your incredible dedication and hard work in developing the Playtime app have truly made a difference. Thank you for going above and beyond to make this event a success."

Stephanie Eldridge-SalilicanCisco Innovation ProgramsDedication to Playtime FY25

"Your team has demonstrated remarkable dedication, creativity, and the ability to think outside the box. Congratulations to the Runners of Chennai Innovation Summer 2023!"

Arun ManiCisco Chennai InnovationChennai Innovation 2023 - Runner-up

"You got expertise in our code base and started to contribute great within your first year. Thanks for all your contributions in WebSquad."

Newton JoshuaCisco WebSquad Lead1-Year Service Recognition

04. Selected Work

Cisco

Playtime Innovation Platform

Started as a side project, now powers innovation events across Cisco - hackathons, Pinnacle Awards, and CodeFests. Centralizes ideas into a searchable space with customizable branding, real-time analytics, and AI-powered search that discovers past ideas by intent, not keywords.

Adopted across Cisco's product organization. Two personal recognitions from Cisco's CPO. AI Search called "a game-changer" by engineering leadership.

ReactNode.jsTypeScriptPythonChromaDBLangChain
Cisco

Webex Wholesale RTM

Wholesale Route-to-Market platform bringing Webex to SMBs through global service providers. Operations APIs, Partner Portal, and high-volume transaction workflows supporting the BroadWorks-to-Webex migration.

Playtime Top 10% globally. Reduced customer cases ~30% through Cypress automation. Runner-up Chennai Innovation 2023.

AngularNgRxMicro-frontendsJavaSpring BootCypressJest
Cisco

Meeting Server Web App

Modernizing the Cisco Meeting Server management interface. Rebuilding legacy patterns into a modern React frontend with improved responsiveness and accessibility.

"Hidden Hero" award from CMS Web App leadership for impact on the team and product.

ReactTypeScriptNode.jsREST APIs
Scientific Games

iVIEW 4 Player Interface

Next-gen player interface for casino gaming machines. Dynamic marketing animations with instant response on multi-touch displays. Led UI component development and state management across a 30-person project.

Introduced NgRx store architecture and improved app performance. Star Award for delivery quality and mentorship.

AngularReactNgRxReduxTypeScriptSCSSSVG
DXC Technology

Laboratory Information Management

Laboratory Information Management System for pathology labs. Designed UI components, built .NET API integrations, and architected data processing algorithms on a 15-person cross-functional team.

Recognized for consistent quality since day one. Multiple Spot Awards for delivering significant value to the organization.

Angular.NET Web APISQLBootstrapMaterial Design

05. Tech Stack

Frontend
AngularReactTypeScriptJavaScriptHTMLSCSS/CSSRxJSNgRxRedux
Backend & APIs
Node.jsJavaSpring BootTypeORM.NETREST APIsSQL
Architecture
HLD/LLDCode ReviewMicro-frontendsState ManagementComponent DesignSystem Design
Testing & DevOps
CypressJestJasmineDockerJenkinsCI/CDGit
AI & Exploration
RAG PipelinesLangChainChromaDBWeaviateLLM Integration
AI-Assisted Dev
GitHub CopilotCursorCodex
CertificationsCisco Generative AI Blue Belt (2024) · Cisco Generative AI Green Belt (2024) · Generative AI Collaboration White Belt (2024)

06. Get in Touch

Let's talk.

Open to interesting projects, collaborations, and opportunities. My inbox is always open.

Say hello
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Designed & built by Sibiraj Rajendran.