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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

    Senior Engineer, Product & Engineering

  • Years of Experience

    10.9 years

  • Professional Portfolio

    View here

Skillsets

  • Node.js
  • ECS
  • Ejabberd
  • FastAPI
  • Flask
  • High availability
  • Jenkins
  • Maven
  • messaging
  • MQTT
  • EC2
  • Open Telemetry
  • PostgreSQL
  • RDS
  • Restful APIs
  • S3
  • SIP
  • SQS
  • XMPP
  • Spring
  • Java - 5 Years
  • MySQL - 6 Years
  • MySQL - 6 Years
  • Docker - 5 Years
  • Erlang
  • Distributed Systems - 2 Years
  • Oracle
  • RabbitMQ
  • Redis
  • Java - 5 Years
  • AWS - 3 Years
  • Python - 2 Years
  • Git - 7 Years
  • Graphite
  • Micrometer
  • Microservices
  • NestJS
  • TypeScript

Vetted For

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

Professional Summary

10.9Years
  • Apr, 2025 - Present1 yr 3 months

    Senior Engineer, Product & Engineering

    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 CX

Applications & Tools Known

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    MySQL

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    jQuery

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    Oracle

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    Git

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    Visual Studio Code

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    Confluence

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    AWS Cloud

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    Javascript

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    Brand24

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    Docker

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    AWS

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    Typescript

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    Python

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    Erlang

Work History

10.9Years

Senior Engineer, Product & Engineering

Earthtree Data Services
Apr, 2025 - Present1 yr 3 months
    Worked with field teams and senior product managers to turn on-ground operational insights into structured product requirements. Evaluated technical feasibility across development, design, and product teams to surface blockers early and keep delivery on track. Mentored 2 junior engineers on application training, software support, and technical documentation.

Senior Software Engineer

Fittr
Dec, 2021 - Apr, 20253 yr 4 months
    Wrote Python ETL scripts to migrate data between microservices after a service split, with validation checkpoints at each stage. Zero data loss across all migrations. Migrated the legacy Spring chat service to AWS ECS, fixed persistent memory leaks, added HA clustering, and moved to managed RabbitMQ and Redis with Micrometer and Open Telemetry APM. Scaled the service to 500+ high-availability paid groups. Built high-performance RESTful APIs to integrate HART Ring wearable data, enabling real-time sync of fitness metrics (HRV, sleep, step count) and women's wellness tracking. Led API refactoring in Node.js (NestJS/TypeScript), restructuring data schemas across multiple microservices to cut response times and unblock feature delivery. Built role-based auth middleware in NestJS with Google OAuth for fine-grained access control across services.

Software Engineer 2

PayPal
Sep, 2018 - Dec, 20213 yr 3 months
    Directed the revamp of the 1099K tax reporting system, working with product and legal teams to close gaps in financial data pipelines and significantly reduce corrections for PayPal US customers. Implemented enhancements to the CP2100 IRS compliance flow, substantially reducing backup withholding and B Notices for US merchants. Optimized RESTful API calls across multiple compliance services during a major system upgrade, cutting latency by 8% and reducing transaction load.

Software Developer

Kapture CX
Jun, 2015 - Sep, 20183 yr 3 months
    Built and launched a cross-platform Web Chat SDK (StropheJS, BackboneJS) for client ticketing and inquiry system integration. Added email service integration into the CRM ticketing platform, improving support team workflows. Built a self-service Reporting Engine that let clients create and schedule custom report templates for recurring ticketing and lead analytics.

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

2Projects

Werkflow Open Source

    Open-source enterprise workflow automation platform for process orchestration and automated task flows, built end-to-end using Generative AI software development techniques.

Fittr Chat Re-Architecture

    Re-architected real-time chat on an Erlang ejabberd fork, replacing messaging with managed RabbitMQ and Redis, adding HA clustering and APM from scratch.

Education

  • Master of Computer Applications

    Indian Institute of Technology, Roorkee (2015)

  • BSc in Computer Science (Honours)

    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