Summary
Overview
Work History
Education
Skills
Websites
Languages
Personal Information
Projects
Timeline
Generic

Siddharth Vaithinathan

Chennai

Summary

Principal Software Engineer at AthenaHealth, with extensive experience in system design, architecture, and cloud platforms. Proficient in multiple programming languages, including Python, C/C++, and Java, I led AI-driven initiatives that delivered over $3M in annual savings, enhanced operational efficiency, and ensured compliance. Recognized for mentoring and developing high-performing teams, while driving technical excellence and scalable engineering solutions.

Overview

15
15
years of professional experience

Work History

Principle Software Engineer

AthenaHealth
Chennai
09.2023 - Current
  • Architected and productionized an Agentic AI system that automated high-volume operational workflows with multi-agent planning, monitoring, and exception handling, saving $2M+ annually in operational costs while improving reliability, compliance, and turnaround times.
  • Led development of the Match & PreApply 2.0 platform for ERA post-processing and claims automation, reducing failure rates from 12% to and cutting downstream claim errors by double digits. Partnered with product and operations to drive adoption across multiple payer integrations with enterprise-grade compliance and scalability.
  • Delivered an AI-powered RAG pipeline for auto-generating rule documentation, eliminating manual effort, improving consistency, and saving 2,000+ developer hours annually across engineering teams.
  • Directed AI initiatives in the Collector division, owning technical strategy, roadmap planning, and execution oversight to reduce manual intervention and accelerate revenue realization through automation.
  • Provided engineering leadership and mentorship, conducting design/code reviews, establishing best practices for scalable AI deployment, and fostering a culture of reliability, knowledge sharing, and technical excellence across AI/ML and backend teams.

Software Development Engineer

Amazon.com, Inc.
Chennai
07.2020 - 08.2023
  • Engineered and delivered Prime Video pricing solutions capable of scaling to 4M+ transactions per second with API response times under 10ms and failure rates below 0.01%, enabling seamless global commerce and customer trust at massive scale.
  • Built pricing systems for new Amazon businesses, accelerating go-to-market launches with faster turnaround times and supporting rapid experimentation and validation of new digital products (Kindle, Alexa, Prime Video, etc.).
  • Designed compliance-driven pricing platforms ensuring customers remained aligned with new and evolving global regulations, safeguarding trust, avoiding penalties, and enabling Amazon to operate smoothly across multiple markets.
  • Delivered highly scalable, latency-sensitive distributed pricing systems adaptable to ambiguous and evolving business requirements, ensuring resilience, scalability, and rapid support for new business models.
  • Provided technical leadership through architecture reviews, code reviews, and mentoring, while driving cross-org initiatives in scalability, resilience engineering, and secure distributed system design.
  • Partnered with Product, Finance, and Business stakeholders to align pricing strategies with financial accuracy, compliance requirements, and customer experience objectives across geographies.
  • Contributed to organizational growth by hiring, mentoring, and establishing best practices, fostering a culture of technical excellence, ownership, and innovation across engineering teams.

Senior Analyst

BA Continuum India Private Limited
Chennai
06.2018 - 06.2020
  • Led multiple product developments, including building a real-time transaction data consolidation system for risk analysis, enabling faster fraud detection, improved decision-making, and greater operational efficiency.
  • Coordinated with cross-functional stakeholders (business, product, operations) to gather and refine requirements, ensuring alignment of technical solutions with strategic business goals.
  • Owned end-to-end solution delivery — responsible for design, development, testing, and deployment of scalable systems that consistently met stakeholder needs in high-visibility programs.

Senior Engineer- Firmware

NEC India Pvt Limited
Chennai
11.2012 - 09.2014
  • Led design and development of critical platform features, including Login Protection (3K LOC, C) to prevent brute-force password attacks, PTP Protocol Provisioning & Alarm Detection (4K LOC, C++) for precise time synchronization (IEEE 1588v2), and High Availability 1+1 Protection (12K LOC, C) ensuring seamless failover and service continuity.
  • Owned end-to-end feature delivery — created basic/detailed design docs, implemented Finite State Machines, developed proprietary communication protocols, and drove coding, integration testing, and defect resolution across all phases.
  • Module Lead responsibilities across teams of 1–8 engineers, accountable for prototyping, architecture, design reviews, coding oversight, bug fixing, and ensuring robust, production-ready deployment of features in mission-critical telecom systems.

Project Engineer

Wipro Technologies
Chennai
04.2010 - 10.2012
  • mplemented core telecom features including a SIP Invite handler without SDP (C++, Linux, 5020MGC12) and maintenance of Call Control module (C++, CHILL, A1000s12), ensuring accurate signaling, call routing, and resolution of critical issues through lab simulation, bug fixing, and solution delivery.
  • Developed an internal Assessment Tool (Perl, UNIX, 4K LOC), similar to GRE/GMAT evaluation, used to assess newly hired engineers in the ALU account; responsible for requirements gathering, design, and full implementation.
  • Owned end-to-end delivery across projects — gathering requirements, producing basic/detailed designs, coding, unit/integration testing, and defect resolution — ensuring production-ready, reliable solutions in telecom and enterprise environments.

Education

Bachelor of Engineering -

Anna University
Chennai
04.2009

Skills

  • Programming languages: Python, Java, C, Perl, JavaScript
  • Database management: PostgreSQL, Oracle, DynamoDB
  • System design and architecture
  • Cloud computing: AWS
  • Software development methodologies
  • Mentorship and guidance
  • Multithreading concepts
  • Data structures and algorithms
  • Microservices architecture

Websites

Languages

  • English
  • Tamil

Personal Information

Title: Software Architect/Polyglot Developer

Projects

Rhino Journal (rhinojournal.com):  

Built and launched an AI-powered journaling platform that helps users gain emotional clarity and actionable insights from their writing. Designed and developed features including real-time sentiment and energy detection, an AI coach for personalized guidance, weekly summaries, vibe scoring, and mood-to-action prompts. 

Timeline

Principle Software Engineer

AthenaHealth
09.2023 - Current

Software Development Engineer

Amazon.com, Inc.
07.2020 - 08.2023

Senior Analyst

BA Continuum India Private Limited
06.2018 - 06.2020

Senior Engineer- Firmware

NEC India Pvt Limited
11.2012 - 09.2014

Project Engineer

Wipro Technologies
04.2010 - 10.2012

Bachelor of Engineering -

Anna University

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Siddharth Vaithinathan