profile-pic
Vetted Talent

Lamtei M Wahlang

Vetted Talent

I'm a backend developer with 8.5+ years of experience in different domains, including Payments (Compliance Unit), CRM, Fitness (IM Feature).

At FITTR, a leading fitness app, I develop backend services and APIs using Erlang, Java, Spring Framework and MySQL to create robust, scalable, and concurrent solutions that help users achieve their fitness goals.

At PayPal, I contributed to the development and testing of the compliance services with focus on ensuring customers and merchants compliance with US IRS using Java, Spring, Oracle DB and IBM ODM.

At Kapture CRM, a designed and implemented features that integrated with their ticketing system to help clients improve customer satisfaction which involves both backend and web development using Java, Bootstrap, Backbone JS and Highcharts JS.

I am passionate about learning new technologies and solving challenging problems that make a positive business impact.

  • Role

    Product & Systems Developer

  • Years of Experience

    10.3 years

Skillsets

  • CI/CD
  • TypeScript
  • System Design
  • Scalability engineering
  • Performance monitoring
  • opentelemetry
  • NoSQL
  • NestJS
  • MongoDB
  • Microservices
  • Micrometer
  • Machine Learning
  • Kafka
  • Graphite
  • Generative AI
  • Database optimization
  • Java - 5 Years
  • Git - 7 Years
  • Python - 2 Years
  • JavaScript - 5 Years
  • AWS - 3 Years
  • Spring
  • Redis
  • RabbitMQ
  • Oracle
  • Distributed Systems - 2 Years
  • Erlang
  • Docker - 5 Years
  • MySQL - 6 Years
  • MySQL - 6 Years
  • Java - 5 Years

Vetted For

10Skills
  • Roles & Skills
  • Results
  • Details
  • icon-skill_image
    Lead Backend DeveloperAI Screening
  • 76%
    icon-arrow-down
  • Skills assessed :Accessibility, HLD, LLD, Performance Optimization, Responsive Design, Hibernate, Micro services, Spring Boot, Git, Java
  • Score: 68/90

Professional Summary

10.3Years
  • Apr, 2025 - Present1 yr

    Product & Systems Developer

    Earthtree Data Services
  • Dec, 2021 - Apr, 20253 yr 4 months

    Senior Software Engineer

    Fittr
  • Sep, 2018 - Dec, 20213 yr 3 months

    Software Engineer 2

    PayPal
  • Jun, 2015 - Sep, 20183 yr 3 months

    Software Developer

    Kapture

Applications & Tools Known

  • icon-tool

    MySQL

  • icon-tool

    jQuery

  • icon-tool

    Oracle

  • icon-tool

    Git

  • icon-tool

    Visual Studio Code

  • icon-tool

    Confluence

  • icon-tool

    AWS Cloud

  • icon-tool

    Javascript

  • icon-tool

    Brand24

  • icon-tool

    Docker

  • icon-tool

    AWS

  • icon-tool

    Typescript

  • icon-tool

    Python

  • icon-tool

    Erlang

Work History

10.3Years

Product & Systems Developer

Earthtree Data Services
Apr, 2025 - Present1 yr
    Led product requirements mapping initiatives by collaborating with product managers, UI/UX designers, and development teams to translate business needs into technical specifications for product roadmap planning. Implemented user feedback loops to collect, analyze, and prioritize feature enhancements based on field user needs and business impact, improving product-market fit and product adoption. Managed and mentored a technical trainer while developing documentation and product training content to ensure effective knowledge transfer across field teams.

Senior Software Engineer

Fittr
Dec, 2021 - Apr, 20253 yr 4 months
    Architected and executed critical refactoring of progress tracking APIs, restructuring data schemas to resolve scalability bottlenecks, resulting in 50% improvement in API response times across multiple microservices using NestJS and TypeScript. Spearheaded complete revamp of real-time chat infrastructure built with Erlang, Spring, and RabbitMQ, implementing Redis caching strategies and comprehensive monitoring using Micrometer, OpenTelemetry, and Graphite. Re-architected distributed messaging system for horizontal scalability, achieving 50% reduction in bottlenecks and significantly enhancing user engagement metrics. Developed intelligent automated push notification system for timely client-coach communications, implementing context-aware reminders and daily summaries that increased user retention by 25%. Enhanced in-app voice and video calling infrastructure, optimizing WebRTC implementation and reducing call setup time by 20%. Integrated OpenAI capabilities into platform, delivering AI-powered features for intelligent workout recommendations and nutrition insights.

Software Engineer 2

PayPal
Sep, 2018 - Dec, 20213 yr 3 months
    Drove major system upgrade across multiple compliance microservices, optimizing API call patterns and reducing transactions per minute (TPM) by 25%, achieving 8% latency reduction and substantially improving overall system throughput. Collaborated with product managers, compliance stakeholders, and cross-functional engineering teams to revamp 1099K tax reporting system for US customers. Implemented proactive gap identification framework and automated resolution strategies, reducing 1099K corrections by 30% and significantly enhancing tax reporting accuracy for merchants. Delivered critical enhancements to CP2100 compliance flow, implementing automated validation and error handling that reduced backup withholding notices by 60% and IRS B Notices by 45%, improving tax compliance for PayPal US merchants.

Software Developer

Kapture
Jun, 2015 - Sep, 20183 yr 3 months
    Designed and launched enterprise Web Chat SDK using Strophe.js and Backbone.js, leading cross-platform integration efforts spanning Web, Android, and iOS platforms. Engineered highly customizable workflow engine enabling seamless integration with client ticketing and inquiry management systems, enhancing customer support capabilities for 50+ enterprise clients. Architected and implemented in-house email service for CRM ticketing platform, streamlining communication workflows and reducing response times by 35%, improving customer relationship management efficiency.

Achievements

  • Collaborated in redesign and revamping the Fittr chat module to address design issues and add features.
  • Worked on the back-end API for the Fittr Training Tool and admin dashboard.
  • Improved 1099K reporting and system enhancement for CP2100 flow at PayPal.
  • Developed system upgrade at PayPal that reduced API calls.
  • Contributed to GCCVP craftsmanship to improve software quality at PayPal.
  • Collaborated in the development and integration of the Chat SDK for Kapture CRM.
  • Played a core role in refactoring progress APIs restructuring data and schema to address scalability and performance issues across multiple services using NestJs and Typescript.
  • Spearheaded the revamp of the in-house chat services, implementing caching, enhanced monitoring, and re-architecting the system for scalability, resulting in significantly increased user engagement and system performance.
  • Upgraded and migrated legacy upstream dependencies, including Redis and RabbitMQ, for improved reliability.
  • Collaborated in chat integration with various app features, developing automated push notification system for timely updates and seamlessly integrating OpenAI capabilities.
  • Contributed significantly to a system upgrade affecting multiple compliance services at PayPal, optimizing API calls and reducing latency.
  • Led collaboration to revamp the 1099K reporting system, significantly reducing 1099K corrections and enhancing tax reporting accuracy.
  • Played a significant role in critical enhancements to the CP2100 flow, substantially reducing backup withholding and IRS B Notices, improving tax compliance for PayPal US merchants.
  • Developed and launched a Web Chat SDK using Strophe JS and Backbone JS, enhancing customer support capabilities.
  • Developed a robust Reporting Engine, a template-based, generic reporting tool for creating charts and tables for automated ticketing and lead generation reports.

Testimonial

PayPal

Priya Srivastava

Lamtei has always proved himself best in terms of technical and professional communication skills. He is creative in terms of finding out the solution to a problem and has the ability to impress people with his outstanding analytical skills.

Major Projects

4Projects

Chat Revamp

Fittr
Jun, 2023 - Present2 yr 10 months

    Collaborated with cross-functional teams to revamp Fittr's in-house chat services using Java Spring and Erlang and includes:

    • Improving caching with Redis
    • Refactoring and migrating all dependencies to managed services for enhanced security
    • Rearchitect the system to support horizontal scaling
    • Refactoring group chat module to scale to thousands of groups
    • Enhanced monitoring by adding metrics
    • Adding new features and fixing issues and bugs

Report Engine

    Design and implementation of Report Engine, template based generic reporting tool.

1099K and CP2100 enhancements

PayPal
Jan, 2020 - Nov, 20211 yr 10 months
    • Worked across teams to make enhancements for CP2100 and 1099K reporting for reducing customer friction and improve compliance of US PayPal merchants. These enhancements spans across several compliance services in PayPal as well as dependencies with other data teams including data, user and payments teams.
    • Demonstrated ability to deliver project by collaborating with the business and data teams to execute and drive the 1099K and CP2100 processes to completion ensuring regulatory compliance for US PayPal accounts on time.

Reporting Engine

Kapture CX
Jan, 2015 - May, 2015 4 months
    • Contributed to the design and implementation of the Reporting Engine at Kapture, a template-based versatile reporting tool utilising Java, Bootstrap, and Highcharts JS.
    • It dynamically generates report templates using data categorised as metrics customised according to client needs.
    • The templates are used by clients for automating ticketing and lead generation reports.

Education

  • Master of Computer Applications

    Indian Institute of Technology (2015)

  • Bachelor of Science (Honours) in Computer Science

    North Eastern Hill University (2012)

Certifications

  • Hadoop Platform and Application Framework

    Coursera (Feb, 2019)
    Credential ID : 8QW43JSNHHEN

  • Hadoop platform and application framework by university of california san diego on coursera, 2019

  • Hadoop platform and application framework by university of california san diego on coursera 2019