James Mascarenhas

// expertise

Technical Skills

Strong written and verbal communication; ability to bridge business needs with technical execution; skilled at simplifying complex concepts for non-technical stakeholders.

🗄️ Databases 7 yrs

MySQLPostgreSQLVector DBs

💻 Programming Languages 5 yrs

PythonJavaScriptPHPSQL

🧩 Frameworks & Libraries 5 yrs

FlaskFastAPIDjango React.jsAngularNext.js Express.jsLaravelCodeIgniter LangChainLangGraphCopilotKit

☁️ Cloud Platforms 5 yrs

AWSGCPAzureFirebase

🔀 Version Control 5 yrs

GitGitHub

🐳 Containerization / CI-CD 5 yrs

DockerKubernetesGitHub Actions

🤖 LLM / AI Tooling 3 yrs

OpenAI APIsGoogle Gemini APIs Hugging FaceCopilotKit

// career

Work Experience

USPS · Remote, Contractual

11/2023 – Present

AI ChatBot Developer (Google Dialogflow CX)

Led the successful migration of legacy chatbots from Dialogflow ES to Dialogflow CX within a 12-month timeframe, modernizing the conversational AI platform.
Redesigned and implemented complex conversation flows using Dialogflow CX's state machine architecture for improved scalability and maintainability.
Developed Flask-based RESTful APIs using Python and Flask to interface with the chatbot, enabling dynamic user interactions and delivering context-aware responses.
Integrated Generative AI into Dialogflow CX using webhook calls to Google Vertex AI's Generative API, enabling more natural and engaging customer conversations.

Outlier.io · Remote, Freelance

03/2023 – 05/2024

AI Chatbot Quality Evaluator

Generated diverse, domain-specific prompts and evaluated LLM-generated responses across key quality metrics including factual accuracy, instruction adherence, formatting, verbosity, and safety.
Annotated and corrected model outputs to provide high-quality training signals for iterative fine-tuning of large language models (LLMs).
Focused on enhancing a Hindi-language LLM, with particular attention to improving grammar, syntactic correctness, and linguistic fluency.
Contributed to the continuous improvement of model performance by identifying response patterns, edge cases, and areas for linguistic optimization.

Bonton Opticians · Delhi

08/2022 – 02/2023

Full Stack Developer

Migrated legacy website from core PHP to the Laravel framework, improving code maintainability, security, and performance. Eliminated security threats such as DDoS Attacks, SQL Injections and Cross-site Scripting.
Developed a proof-of-concept (POC) application using Python and the Flask framework to integrate the company's Salesforce database with the website, enabling real-time inventory display.
Oversaw end-to-end website migration and ongoing administration, ensuring minimal downtime and seamless user experience.
Collaborated with KPMG to perform a comprehensive security risk assessment and implemented mitigation strategies to enhance application security and compliance.

E5 Infrastructure Pvt. Ltd. · Gurgaon

09/2015 – 07/2022

Full Stack Web Developer | IT Advisor

Developed an HR management application using the CodeIgniter framework to streamline employee attendance tracking and reporting.
Built a fuel management system in CodeIgniter to monitor and record vehicle fuel usage, enhancing operational efficiency and reducing wastage.
Designed, developed, and maintained multiple company websites using WordPress CMS, ensuring responsive design and SEO optimization.
Managed the end-to-end IT infrastructure for the company, including web and application architecture, development, deployment, and maintenance.
Served as a freelance IT consultant for five years, providing ongoing support and development expertise across web and application projects.

SysTools Software Pvt. Ltd. · Delhi

08/2013 – 08/2015

Web Developer

Led website design and development initiatives, ensuring high-performance, responsive, and SEO-optimized web experiences. The managed website became the second-highest ranking site in organic traffic.
Managed all aspects of website content and technical implementation to improve Google SERP rankings.
Implemented on-page and off-page SEO strategies, including meta tagging, schema markup, backlinking, and site speed optimization.
Created and maintained content aligned with SEO best practices to drive organic traffic and improve user engagement.

// portfolio

Personal Projects

🧭

Compass – AI Career Counselor

An AI-powered career guidance app built with Python, LangChain, StreamLit, and Google Gemini. Assists students in making informed career decisions based on personal goals and socioeconomic background.

View Project

🔗

LaGoSt App

Demo application integrating LangChain with Google Gemini APIs using Python and StreamLit. Showcases the potential of combining LLM orchestration tools with interactive frontend frameworks to build Generative AI apps.

View Project

📝

Web App Speed Optimization Blog

Technical blog sharing practical tips and techniques to improve web application performance, focusing on front-end optimization, caching, and load time reduction using WordPress.

Read Blog

💬

Stack Overflow Contributor

Actively contributes by answering technical questions and helping peers resolve programming challenges across web development, backend APIs, and cloud tooling.

View Profile

🏋️

Exercism.org Mentor

Reviews code submissions and provides mentorship to learners, focusing on clean code practices, debugging techniques, and improving algorithmic thinking.

View Profile

⭐

Fiverr – 350+ Five-Star Reviews

Over 350 five-star reviews from clients worldwide on Fiverr for delivering exceptional backend support, web development, and AI integration services.

View Profile

Technical Skills

Work Experience

Personal Projects

Certifications

Education