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I'm Joseph Robert Lewin, a Senior Full-Stack Engineer with 8+ years building production-grade web applications using the MERN stack and Python services. I design scalable SaaS platforms, high-traffic UIs, and reliable backend systems, with a keen eye for security and maintainability. I've integrated AI and LLM-powered workflows into real-world products, focusing on automation, analytics, and operational efficiency. I enjoy collaborating in remote-first teams, shaping cloud-native architectures, and delivering pragmatic solutions from concept to production.…I'm Joseph Robert Lewin, a Senior Full-Stack Engineer with 8+ years building production-grade web applications using the MERN stack and Python services. I design scalable SaaS platforms, high-traffic UIs, and reliable backend systems, with a keen eye for security and maintainability. I've integrated AI and LLM-powered workflows into real-world products, focusing on automation, analytics, and operational efficiency. I enjoy collaborating in remote-first teams, shaping cloud-native architectures, and delivering pragmatic solutions from concept to production.

Joseph Robert Lewin

Full Stack Developer, Web Developer, Back-End Developer, +4

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I'm Joseph Robert Lewin, a Senior Full-Stack Engineer with 8+ years building production-grade web applications using the MERN stack and Python services. I design scalable SaaS platforms, high-traffic UIs, and reliable backend systems, with a keen eye for security and maintainability. I've integrated AI and LLM-powered workflows into real-world products, focusing on automation, analytics, and operational efficiency. I enjoy collaborating in remote-first teams, shaping cloud-native architectures, and delivering pragmatic solutions from concept to production.…I'm Joseph Robert Lewin, a Senior Full-Stack Engineer with 8+ years building production-grade web applications using the MERN stack and Python services. I design scalable SaaS platforms, high-traffic UIs, and reliable backend systems, with a keen eye for security and maintainability. I've integrated AI and LLM-powered workflows into real-world products, focusing on automation, analytics, and operational efficiency. I enjoy collaborating in remote-first teams, shaping cloud-native architectures, and delivering pragmatic solutions from concept to production.

Available to hire

I’m Joseph Robert Lewin, a Senior Full-Stack Engineer with 8+ years building production-grade web applications using the MERN stack and Python services. I design scalable SaaS platforms, high-traffic UIs, and reliable backend systems, with a keen eye for security and maintainability.

I’ve integrated AI and LLM-powered workflows into real-world products, focusing on automation, analytics, and operational efficiency. I enjoy collaborating in remote-first teams, shaping cloud-native architectures, and delivering pragmatic solutions from concept to production.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

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Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Full-Stack Engineer (MERN + AI) at Eagleanalytix

July 1, 2023 - Present

Senior IC on a cloud-native SaaS platform, building and evolving customer-facing features using the MERN stack and AI integrations. Led end-to-end feature delivery from product discussions to design, implementation, testing, deployment, and post-release support. Designed React/TypeScript dashboards to configure and monitor AI-driven workflows with clear status visibility and actionable feedback. Implemented Node.js and Python backend services to orchestrate LLM-powered workflows, including prompt execution, background job processing, retries, and error handling. Built REST and GraphQL APIs with robust authentication and authorization, and collaborated with data/platform teams to optimize MongoDB and PostgreSQL schemas for scalable data. Added logging, monitoring, and alerting; contributed to incident response and root-cause analysis. Worked with product managers and designers in remote-first teams; supported CI/CD pipelines and AWS deployments.

Senior Full-Stack Engineer (MERN) at Tines

January 1, 2022 - June 1, 2023

Contributed to MERN-based analytics and reporting platform; built and maintained React/TypeScript dashboards for data exploration, reporting views, and data visualization. Implemented Node.js backend services for data ingestion, aggregation, and business logic for analytics workflows. Integrated third-party APIs and internal services to collect, normalize, and validate data from multiple upstream sources. Designed and optimized MongoDB and PostgreSQL schemas and queries, improving performance as usage grew. Worked with product and design to refine requirements; applied authentication and authorization to protect customer data. Participated in frontend performance optimization, backend refactoring, and architectural improvements to support long-term maintainability.

Software Engineer at Thoughtworks

January 1, 2020 - December 1, 2021

Delivered full-stack web features across multiple client projects using React, Node.js, and RESTful APIs. Collaborated with designers and project managers to translate requirements into production-ready solutions. Improved frontend load times and usability through component optimization and better state management. Implemented authentication, authorization, and foundational security practices. Contributed to Git-based workflows, peer code reviews, and Agile sprint planning.

Junior Full Stack Developer at Questrade

January 1, 2018 - December 1, 2019

Assisted in developing full-stack applications using JavaScript and REST APIs across multiple client-facing projects. Enhanced Angular-based frontend components, contributing to a visual overhaul that improved UI feedback. Participated in debugging and incident-resolution sessions, reducing error resolution time. Followed Git-based version control and contributed to more structured code management workflows.

Junior Front End Developer at Montreal OnSite

January 1, 2016 - December 1, 2017

Integrated frontend applications with REST APIs, handling data fetching, loading states, and basic error handling. Assisted with client-side routing using React Router. Fixed UI bugs, improved component performance, and refactored code for readability. Collaborated with senior engineers during code reviews and followed clean-code practices; participated in Agile ceremonies.