Arun Sankar SFull stack lead · hands-on developerRésumé
System onlineChennai, India

I turn enterprisecomplexityinto scalable software.

Full Stack Lead and hands-on developer with 12+ years connecting product requirements, architecture, implementation, infrastructure, and engineering teams.

Explore the systemDownload résumé
12+
Years building
06
Career releases
04
System layers
InterfaceAngular · React
ServicesNode · Spring
PlatformOpenTofu · Cloud
Illustrated portrait of Arun Sankar SLead · hands-on · 12+ yrs
ArchitectureStableDeliveryActive

01Capability architecture

One system. Four connected responsibilities.

Strong delivery happens when interfaces, services, platforms, and people are designed as parts of the same system. Select a node to inspect the evidence.

Full-stackDelivery
01

Node inspected

Build across the stack

Create dependable product experiences from responsive interfaces through secure services and data layers.

  • Enterprise interfaces with Angular, React, TypeScript, RxJS, and NgRx
  • REST services and integrations using Node.js, Spring Boot, Java, and PHP
  • Automated coverage with Playwright, Jest, Jasmine, Karma, and Karate
AngularReactNode.jsSpring BootTypeScript

02Modernization lab

Move the system forward without stopping it.

A conceptual view of how I approach legacy modernization: discover dependencies, define boundaries, automate repetition, and improve operability in deliberate stages.

Transformation progress72%
Automate infrastructure
LegacyCoupled system
ModernClear boundaries
LegacyModern
  1. 01Discover
  2. 02Decouple
  3. 03Automate
  4. 04Operate

03Release history

Built in layers. Refined through delivery.

Twelve-plus years of increasing scope—from building individual workflows to connecting architecture, infrastructure, teams, and stakeholders.

v6.02023 — Present

Current selection

Lead Software Engineer / Tech Lead

HTC Global Services

Leads full-stack delivery, infrastructure automation, architecture decisions, and engineering growth.

  • Shapes HLD and LLD while collaborating with client and stakeholder teams
  • Builds repeatable OpenTofu/Terraform workflows and mentors developers
System designOpenTofuTerraformMentoringAI-assisted engineering

04Selected systems

Decisions, not just deliverables.

Anonymized engineering stories focused on scale, constraints, decisions, and outcomes without exposing client identities or proprietary implementation details.

Context

An enterprise insurance platform handling request bursts above 10,000 hits required a carefully controlled migration from WebSphere to Red Hat OpenShift Service on AWS (ROSA). Client identity and proprietary implementation details remain intentionally anonymous.

Context boundaryPresented generically to protect the insurance client and proprietary system details.

Engineering decisions

  1. 01Design the target system and implement security and configuration controls across the migrated application
  2. 02Automate server and environment configuration through repeatable OpenTofu workflows
  3. 03Reduce API latency by limiting unnecessary data access and applying situation-appropriate concurrency controls to prevent race conditions

Outcomes

  • Higher application availability following the WebSphere-to-ROSA migration
  • Reduced API latency and more efficient data-access paths under high request volume
ROSAWebSphereOpenTofuREST APIsSecuritySystem design

05Leadership operating system

Clarity compounds.

The technical work matters. So does building the context, feedback loops, and shared ownership that allow a team to keep improving it.

EngineeringDelivery

Operating principle

System design

Make constraints, boundaries, and trade-offs visible before they become expensive.

  • HLD and LLD
  • Architecture walkthroughs
  • Pragmatic decision records

Technology matrix

Tools change. Sound boundaries and engineering judgment travel well.

Frontend
AngularReactTypeScriptRxJSNgRxHTMLCSS
Backend
JavaSpring BootNode.jsExpressPHPRESTMicroservices
Platform & data
OpenTofuTerraformDockerMySQLMongoDBIBM DB2
Quality
PlaywrightJestJasmineKarmaKarateESLint

06Full-stack engineering expertise

Lead full-stack engineering for enterprise modernization.

Based in Chennai, India, I lead the architecture and delivery of maintainable enterprise applications across frontend platforms, backend services, data, security, testing, and infrastructure. My work connects hands-on software engineering with the technical direction teams need to deliver safely at scale.

01

Angular and React frontend architecture

Design scalable TypeScript applications with Angular, React, RxJS, NgRx, reusable UI patterns, automated testing, and accessible responsive interfaces.

02

Node.js, Java, and Spring Boot services

Build secure REST APIs and microservices using Node.js, Spring Boot, JWT, OAuth2, database integrations, and clear service boundaries.

03

Legacy application modernization

Plan incremental migrations from tightly coupled MVC and legacy systems to maintainable frontend, API, and infrastructure layers without disrupting ongoing delivery.

04

Technical leadership and system design

Guide HLD and LLD, architecture decisions, code quality, mentoring, stakeholder communication, and Infrastructure as Code with OpenTofu and Terraform.

Read the full software engineering résumé View professional profiles
Currently leading full-stack engineering delivery

07Professional presence

The work continues beyond this portfolio.

Follow my professional journey, engineering perspective, and public code through LinkedIn and GitHub.

View LinkedInView GitHub
arunsankar_s@live.com