Yamini Arunachalam

Senior Software Engineer

Denver, Colorado, United States16 yrs 7 mos experience
Most Likely To SwitchHighly Stable

Key Highlights

  • 14+ years of experience in scalable distributed systems.
  • Led cross-functional teams to drive significant revenue growth.
  • Expert in simplifying complex architectures for clarity and maintainability.
Stackforce AI infers this person is a Backend-heavy Software Engineer specializing in MarTech and E-commerce solutions.

Contact

Skills

Core Skills

Distributed SystemsAmazon Web Services (aws)JavaSoftware DevelopmentSoftware DesignService Oriented Architecture

Other Skills

KotlinAWSStep FunctionsS3LambdaDynamoDBEvent BridgeGeospatial indexingEC2OpenSearchTypeScriptSpringJUnitTestNGREST

About

When I'm not architecting distributed systems that scale to thousands of requests per second and generate millions of dollars, you can find me doing book reports and math problems with my daughter — sometimes even without AI. I'm a Senior Software Engineer with 14+ years of experience building scalable distributed systems on AWS. I've worked across the full build/ship/iterate lifecycle in both hands-on and project leadership roles, from tech giants like Amazon to startups like Homeshop.My philosophy: Building systems doesn’t have to mean building complex architectures. Many problems can be solved with simple, well-designed solutions. I believe in starting simple and breaking down complex challenges into manageable blocks. Complexity is often unavoidable, but unnecessary complexity is not. I aim to design systems that are clear, maintainable, and easy to reason about. To me, the real strength of engineering lies in clarity and thoughtful simplicity. ACCOMPLISHMENTS at Amazon:* Architected and launched audience support for Amazon Marketing Cloud using Kotlin and AWS (Step Functions, S3, Lambda, DynamoDB, Event Bridge) following event-driven architecture, driving $2.1MM Black Friday revenue (+87% WoW) and $285K CPM fees (+79% WoW) while leading cross-functional teams.* Led end-to-end development of Geographical Insights and Activation, enabling advertisers to analyze postal code level brand penetration using H3 geospatial indexing; built on Kotlin and AWS (Lambda, DynamoDB, EventBridge, EC2, S3, OpenSearch), driving $2.2M in incremental revenue from 8 advertisers.* Led system-level design and development for audience integration with AWS Clean Rooms and machine learning services in Kotlin, enabling secure predictive advertising insights; achieved 18% adoption across AMC instances. at Walmart Labs:* Developed Customer Accounts Services framework using Java and Spring for signup, login, and account-related features across multiple markets supporting 10K users, optimizing it with a customer account object pool.* Built infrastructure and automation frameworks for ‘Returns Management and Claims platforms using Java, Maven, Spring Dependency Injections and JUnit, reducing production defects by 30%.Don't hesitate to reach out via email at yams.bits@gmail.com.

Experience

16 yrs 7 mos
Total Experience
4 yrs 2 mos
Average Tenure
9 yrs 11 mos
Current Experience

Amazon

3 roles

Senior Software Enginer - Kotlin, Java, Python, TypeScript, AWS Services

Promoted

Apr 2021Present · 5 yrs 2 mos · Denver, Colorado, United States · On-site

  • ● Architected and launched audience support for Amazon Marketing Cloud using Kotlin and AWS (Step Functions, S3, Lambda, DynamoDB, Event Bridge) following event-driven architecture, driving $2.1MM Black Friday revenue (+87% WoW) and $285K CPM fees (+79% WoW) while leading cross-functional teams.
  • ● Led end-to-end development of Geographical Insights and Activation, enabling advertisers to analyze postal code level brand penetration using H3 geospatial indexing; built on Kotlin and AWS (Lambda, DynamoDB, EventBridge, EC2, S3, OpenSearch), driving $2.2M in incremental revenue from 8 advertisers.
  • ● Led system-level design and development for audience integration with AWS Clean Rooms and machine learning services in Kotlin, enabling secure predictive advertising insights; achieved 18% adoption across AMC instances.
  • ● Designed secure document-sharing system in Java, Python, AWS (Artifact Service, S3, Lambda), supporting 2K compliance documents (<10 MB each) across 1000 buyers and sellers in the India marketplace; enabled 1K+ document downloads at launch, with projected 3 - 4X growth, while abstracting complex security workflows.
  • ● Drove technical strategy for AWS Marketplace international expansion, designing scalable taxation architectures addressing gaps across 20+ non-MPF countries, unblocking compliant tax collection for 50,000+ sellers.
  • ● Developed advertising data processing system handling 10K ads per retailer using Java, AWS (Glue, Fargate), Kafka, and Spark, enhancing media monetization through effective cross-team collaboration and alignment.
  • ● Mentored 14+ junior engineers and interns on software design, architecture, and AWS solutions.
KotlinAWSStep FunctionsS3LambdaDynamoDB+4

Software Engineer - Java, AWS, TypeScript, Spring, JUnit, TestNG

Jan 2018Jan 2021 · 3 yrs · On-site

  • ● Led end-to-end design and delivery of ‘Trade-In Price Block’ experience for Amazon devices, relocating Trade-In ingress from Buy Box to a high-visibility Unified Price Block across Kindle, Echo, Fire TV, Ring, Eero, Blink, and Fire Stick (US) using Amazon Detail Page framework and Java REST microservices, driving +41% increase in upgrades.
  • ● Spearheaded international expansion of Trade-In experience to UK and Germany, owning end-to-end CX using Java, AWS (DynamoDB, Config Service); launch drove 83K+ customer interactions, with 72% engagement.
  • ● Developed ‘Quint’, an internal test data generation service for device launch validation using Java, Dagger, and AWS DynamoDB, reducing manual test data setup by ~50 engineer-days per year, saving $60K annually.
  • ● Designed and delivered ‘Launch Validation Service’, leveraging REST APIs, AWS Lambda, and TypeScript, Angular, and Node.js UI to streamline pre-launch validations for site merchandisers and program managers.
JavaAWSTypeScriptSpringJUnitTestNG+1

Software Engineer - Java, Python, Spring, TestNG

Apr 2016Jan 2018 · 1 yr 9 mos · On-site

  • ● Designed and implemented ‘Asin Sourcer’, a Java, REST-based web service that retrieves products for creating test deals/offers by interacting with 3+ microservices, implementing validation mechanisms and persisted data in AWS DynamoDB, with components for syncing item data and retrieving products.
JavaRESTAWSDynamoDBSoftware Design

Walmartlabs

Software Engineer-III - Java, Web Services, SQL , CI/CD

Sep 2013Apr 2016 · 2 yrs 7 mos · Bangalore

  • ● Developed Customer Accounts Services framework using Java and Spring for signup, login, and account-related features across multiple markets supporting 10K users, optimizing it with a customer account object pool.
  • ● Built infrastructure and automation frameworks for ‘Returns Management and Claims platforms using Java, Maven, Spring Dependency Injections and JUnit, reducing production defects by 30%.
JavaSpringSQLCI/CDSoftware Development

Homeshop18

Software Engineer - Java

Sep 2012Sep 2013 · 1 yr · Bangalore · On-site

  • Designed and developed a robust framework to support the functional validation of the services layer, including REST-based services such as Cart, Checkout, Payments, and Identity.
  • Created a database utility using Hibernate for efficient DB validations and contributed to performance testing of key services using JMeter.
JavaJUnitSoftware Development

Oracle

2 roles

Mechnical Technical Staff - Service Oriented Archiecture, Java , SQL, Oracle

Promoted

Sep 2011Oct 2012 · 1 yr 1 mo · Bangalore

  • Designed and implemented new features for Human Workflow, component of Oracle BPM Suite
  • which is layered on Oracle SOA suite. Involved in design of ECA processor for Case Management.
  • Currently involved in building a BPM sample based on requirements from customer
JavaSQLOracleService Oriented Architecture

Member Technical Staff

Jul 2009Aug 2011 · 2 yrs 1 mo · Bangalore

JavaSoftware Development

Education

Birla Institute of Technology and Science, Pilani

Bachelor of Engineering (Hons) — Computer Science

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