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I am a software engineer with 10 years of experience designing and delivering AI-powered web platforms, data-driven systems, and scalable full-stack applications. I specialize in Python, JavaScript, and TypeScript, with hands-on experience in React and Vue.js, and I routinely integrate AI/ML models via the OpenAI API and LangChain to build intelligent user experiences. I enjoy innovating in data engineering and product design, building end-to-end data workflows with Snowflake, Kafka, and dbt, and deploying services on AWS and Azure. I strive for a balance of creativity and practicality, bringing AI capabilities into modern products while maintaining robust, scalable systems.…I am a software engineer with 10 years of experience designing and delivering AI-powered web platforms, data-driven systems, and scalable full-stack applications. I specialize in Python, JavaScript, and TypeScript, with hands-on experience in React and Vue.js, and I routinely integrate AI/ML models via the OpenAI API and LangChain to build intelligent user experiences. I enjoy innovating in data engineering and product design, building end-to-end data workflows with Snowflake, Kafka, and dbt, and deploying services on AWS and Azure. I strive for a balance of creativity and practicality, bringing AI capabilities into modern products while maintaining robust, scalable systems.

Razin Molla

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

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I am a software engineer with 10 years of experience designing and delivering AI-powered web platforms, data-driven systems, and scalable full-stack applications. I specialize in Python, JavaScript, and TypeScript, with hands-on experience in React and Vue.js, and I routinely integrate AI/ML models via the OpenAI API and LangChain to build intelligent user experiences. I enjoy innovating in data engineering and product design, building end-to-end data workflows with Snowflake, Kafka, and dbt, and deploying services on AWS and Azure. I strive for a balance of creativity and practicality, bringing AI capabilities into modern products while maintaining robust, scalable systems.…I am a software engineer with 10 years of experience designing and delivering AI-powered web platforms, data-driven systems, and scalable full-stack applications. I specialize in Python, JavaScript, and TypeScript, with hands-on experience in React and Vue.js, and I routinely integrate AI/ML models via the OpenAI API and LangChain to build intelligent user experiences. I enjoy innovating in data engineering and product design, building end-to-end data workflows with Snowflake, Kafka, and dbt, and deploying services on AWS and Azure. I strive for a balance of creativity and practicality, bringing AI capabilities into modern products while maintaining robust, scalable systems.

Available to hire

I am a software engineer with 10 years of experience designing and delivering AI-powered web platforms, data-driven systems, and scalable full-stack applications. I specialize in Python, JavaScript, and TypeScript, with hands-on experience in React and Vue.js, and I routinely integrate AI/ML models via the OpenAI API and LangChain to build intelligent user experiences.

I enjoy innovating in data engineering and product design, building end-to-end data workflows with Snowflake, Kafka, and dbt, and deploying services on AWS and Azure. I strive for a balance of creativity and practicality, bringing AI capabilities into modern products while maintaining robust, scalable systems.

Skills

Experience Level

Expert

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Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at Assistwell LLC

April 1, 2024 - Present

Led the migration of a legacy frontend to Next.js 13+ with React Server Components, improving TTFB and enabling server-side rendering for SEO-critical pages; designed and implemented a role-based access control system in NestJS; integrated 15+ third-party RESTful APIs (Stripe, Plaid, HealthKit) into a Node.js microservices architecture; spearheaded TypeScript adoption across the stack; built a component library with React + Tailwind; implemented secure authentication with JWT, OAuth2, and refresh tokens; established E2E tests with Cypress and unit tests with Jest; mentored junior engineers; deployed frontend on Vercel and backend on Render; enabled feature toggles with LaunchDarkly; supported real-time chat and telehealth video via WebSockets; applied accessibility and cross-browser compatibility.

Senior Software Engineer at ColomboAI

March 1, 2024 - September 22, 2025

Built and maintained a full-stack React + Node.js application serving 500K+ monthly active users in the education domain; migrated a monolithic backend to a modular NestJS architecture; implemented client-side routing, dynamic imports, and lazy loading in Next.js; created admin dashboards with complex charting using React, Recharts, and Material UI; integrated multiple REST APIs (OpenAI, Stripe, Twilio, Google Calendar); established Cypress E2E tests and CI pipelines with GitHub Actions; rewrote core business logic in TypeScript for maintainability; developed internal tools for schema validation using JSON Schema and Faker.js; deployed on Vercel for frontend and Docker + Heroku for backend; emphasized accessibility and cross-browser compatibility; contributed to design system and scalable API architecture.

Software Developer at Kustomer

April 1, 2021 - September 22, 2025

Developed customer-facing ReactJS widgets embedded in external merchant platforms for real-time financial insights; built REST APIs with Node.js + Express for data and authentication; implemented OAuth2 flows with Google and Facebook; introduced Redux Toolkit for state management across eight modules; refactored legacy jQuery code to modern ES6+ React components with unit test coverage; improved frontend reliability with global error boundaries and client-side logging; built dynamic forms with React Hook Form and Yup; collaborated in Agile planning and delivery; integrated real-time analytics with Segment and Google Analytics.

Junior Software Engineer at Poweron Technology

January 1, 2020 - September 22, 2025

Contributed to core UI development with JavaScript (ES6), HTML5, and CSS3; created reusable product listing and filtering components with ReactJS; integrated RESTful APIs for cart, checkout, and inventory; implemented responsive designs and cross-device testing; performed debugging with Chrome DevTools; participated in code reviews, git workflows, and frontend documentation; improved frontend performance with lazy loading and image optimization.

Senior Software Engineer at Assistwell LLC

April 1, 2024 - Present

Led the migration of a legacy frontend to Next.js 13+ with React Server Components, improving TTFB by 40% and enabling server-side rendering for SEO-critical pages. Designed and implemented a role-based access control system in NestJS. Integrated 15+ third-party RESTful APIs including Stripe, Plaid, and HealthKit into a Node.js microservices architecture. Spearheaded the adoption of TypeScript across the full stack, reducing production runtime errors by 35%. Developed a component library using React + TailwindCSS for design consistency across 3 business units. Built a secure authentication & session management system using JWT, OAuth2, and Refresh Tokens in NestJS. Implemented E2E tests using Cypress and unit tests with Jest, achieving 85% test coverage. Led code reviews and mentored 3 mid-level developers. Architected and deployed services using Vercel for frontend and Render for backend, ensuring cost-effective DevOps. Partnered with product owners and designers in agile ceremonies t

Senior Software Engineer at ColomboAI

March 1, 2024 - September 22, 2025

Built and maintained the full-stack React + Node.js application supporting 500K+ monthly active users in the education domain. Migrated monolithic app to a modular NestJS backend, improving developer velocity and API response times by 30%. Implemented client-side routing, dynamic imports, and lazy loading in Next.js to boost performance and reduce bundle size. Created admin dashboards with complex charting and filtering capabilities using React, Recharts, and Material UI. Integrated multiple REST APIs (OpenAI, Stripe, Twilio, Google Calendar) to enhance user experience and feature sets. Worked with QA to set up Cypress E2E tests and established CI pipelines with GitHub Actions. Rewrote core business logic into typed modules using TypeScript, enhancing maintainability and reliability. Developed internal developer tools for schema validation and test data generation using JSON Schema and Faker.js. Authored documentation and conducted knowledge sharing sessions with engineering and produc

Software Developer at Kustomer

April 1, 2021 - September 22, 2025

Developed customer-facing ReactJS widgets embedded in external merchant platforms for real-time financial insights. Built REST APIs in Node.js + Express to expose financial data and authentication services. Led OAuth2 authorization flows with third-party providers such as Google and Facebook. Introduced state management with Redux Toolkit, streamlining logic across eight modules. Refactored legacy jQuery codebases into modern ES6+ React components with unit test coverage. Reduced frontend error rate by 20% by implementing global error boundaries and client-side logging. Implemented dynamic forms with React Hook Form and schema validation using Yup. Participated in sprint planning, task breakdown, and estimation using Agile methodologies. Integrated real-time analytics and event tracking using Segment and Google Analytics.

Junior Software Engineer at Poweron Technology

January 1, 2020 - September 22, 2025

Contributed to core UI development using JavaScript (ES6), HTML5, and CSS3. Created reusable product listing and filtering components with ReactJS for improved UX. Collaborated with backend team to integrate RESTful APIs for cart, checkout, and inventory modules. Implemented responsive design using media queries and grid systems for mobile compatibility. Debugged UI bugs using Chrome DevTools and performed cross-device testing. Managed Git branches for feature releases and participated in weekly standups. Improved frontend performance by implementing lazy loading and image optimization. Participated in code reviews and contributed to frontend documentation.

Senior Software Engineer at Assistwell LLC

April 1, 2024 - Present

Designed and implemented Go-based ingestion services for metrics, logs, and traces within multi-tenant observability pipelines. Deployed and maintained Kubernetes-based infrastructure using Helm charts and automated CI/CD workflows. Integrated OpenTelemetry Collector (Alloy) for ingesting telemetry data from distributed environments. Built remote configuration management APIs and applied fault-tolerant communication patterns. Implemented metrics, logging, and distributed tracing with Prometheus, Loki, Tempo, and Grafana dashboards. Participated in on-call rotation, performing production SRE operations and incident resolution. Led migration of observability pipeline from self-managed to managed Grafana Cloud services. Contributed to OSS components and internal SDKs, improving collector performance and scalability.

Senior Software Engineer at ColomboAI

March 1, 2024 - October 7, 2025

Developed Go microservices responsible for telemetry ingestion, metrics aggregation, and event routing. Built observability stack using Prometheus + Grafana, providing near real-time visualization for internal monitoring. Contributed to internal OpenTelemetry Receiver/Exporter modules for data streaming and transformation. Implemented scalable ingestion API using gRPC and Kafka-based queueing for high-load traffic. Automated deployment pipelines with GitHub Actions and Terraform, reducing downtime across releases. Managed system reliability through alerting, incident postmortems, and SLO tracking. Collaborated with cross-functional teams to design APIs for external telemetry clients. Supported container fleet management and Helm chart versioning across multiple clusters.

Software Developer at Kustomer

April 1, 2021 - October 7, 2025

Built fault-tolerant services in Go and Python for internal telemetry data collection and correlation. Integrated Prometheus exporters for services and Kubernetes nodes to measure infrastructure health. Enhanced system visibility using distributed tracing with OpenTelemetry SDK and Jaeger. Managed Kubernetes clusters, implementing autoscaling and cluster configuration via Terraform and Helm. Participated in SRE on-call rotations, handling incident response and root-cause analysis. Designed alerting and anomaly detection dashboards in Grafana to support 24/7 operations. Optimized ingestion and processing pipelines to support data from 100k+ telemetry sources. Authored runbooks, troubleshooting guides, and playbooks for internal SRE processes.

Frontend Engineer (Include Software Engineer Intern) at Poweron

January 1, 2020 - October 7, 2025

Developed core backend services using Go, focusing on API reliability and low-latency response times. Built microservices integrated with PostgreSQL and Redis using lightweight RPC frameworks. Managed continuous delivery pipelines via Jenkins and Docker Compose. Designed health checks, load balancers, and circuit breakers for resilient deployments. Deployed and monitored distributed systems on AWS with Prometheus and custom Grafana dashboards. Contributed to internal documentation for APIs, observability patterns, and service topology. Participated in architecture design sessions for service mesh and system decomposition strategies. Mentored new engineers in Go development and infrastructure best practices.

Senior Software Engineer at Assistwell LLC

April 1, 2024 - Present

Designed and implemented AI-powered web applications integrating LLMs through OpenAI API and LangChain. Developed full-stack components with Next.js, Nuxt.js, and NestJS, ensuring seamless UI and API performance. Built data pipelines using Kafka and dbt to transform and serve analytics data into production systems. Designed and maintained scalable backend microservices with Python (FastAPI) and Node (NestJS). Integrated secure Stripe payment workflows with event-driven validation and logging. Deployed and managed cloud workloads using AWS ECS, Lambda, and Azure Functions. Collaborated with data scientists to operationalize ML models into user-facing products. Established robust CI/CD workflows and automated testing to support continuous releases.

Senior Software Engineer at ColomboAI

March 1, 2024 - October 15, 2025

Built and maintained AI/ML services delivering real-time recommendations and insights. Designed data workflows using Snowflake, ClickHouse, and Airflow for model training pipelines. Integrated OpenAI and LangChain for intelligent chatbot and summarization features. Worked on FastAPI-based microservices for high-performance inference endpoints. Deployed containerized workloads on AWS (EKS) with full observability through Prometheus and Grafana. Collaborated closely with frontend teams using React and Vite to embed ML results into UX components. Tuned models and data ingestion processes to optimize inference latency and accuracy. Supported experiments, A/B testing, and model monitoring in production.

Software Developer at Kustomer

April 1, 2021 - October 15, 2025

Designed and implemented data products powering analytics dashboards and personalized content. Worked across stack layers: Vue.js frontends, Node.js APIs, and Python data processing. Created ETL workflows integrating Kafka streams and Snowflake warehouses. Integrated Twilio and SendGrid APIs for notification and transactional communication flows. Collaborated with product and design teams to ensure seamless data visualization and reporting experiences. Automated deployment and scaling through Docker, Kubernetes, and Terraform IaC templates. Supported data observability, schema versioning, and monitoring of production pipelines. Participated in agile sprints, mentoring peers on AI-assisted data design and system optimization.

Junior Software Developer at Poweron

January 1, 2020 - October 15, 2025

Built intelligent full-stack solutions combining Python ML APIs and React/Vue.js frontends. Developed REST and GraphQL APIs for integrating ML features into business applications. Implemented Stripe, Postmark, and Twilio integrations for payment and communication services. Applied modern build tools — Vite, Webpack, and Rollup — for fast, modular deployments. Deployed AI-enhanced automation tools that reduced manual analysis time. Collaborated in cross-functional teams, emphasizing fast iteration and experimentation. Participated in open-source initiatives, sharing internal AI tooling publicly. Advocated best practices around code quality, architecture consistency, and data compliance.

Senior Software Engineer at Assistwell LLC

April 1, 2024 - Present

Designed and implemented AI-powered web applications integrating LLMs through OpenAI API and LangChain. Built full-stack components with Next.js, Nuxt.js, and NestJS, ensuring seamless UI and API performance. Built data pipelines using Kafka and dbt to transform and serve analytics data into production systems. Designed and maintained scalable backend microservices with Python (FastAPI) and Node (NestJS). Integrated secure Stripe payment workflows with event-driven validation and logging. Deployed and managed cloud workloads using AWS ECS, Lambda, and Azure Functions. Collaborated with data scientists to operationalize ML models into user-facing products. Established robust CI/CD workflows and automated testing to support continuous releases.

Senior Software Engineer at ColomboAI

March 1, 2024 - October 15, 2025

Software Developer at Kustomer

April 1, 2021 - October 15, 2025

Junior Software Developer at Poweron

January 1, 2020 - October 15, 2025