Open to senior & lead engineering roles
Sumon Biswas
Senior Software Engineer
specializing inAI SaaS Platforms
Five years of backend engineering, and I own the architecture behind what I build. AI systems on RAG, embeddings and LLMs, fintech platforms handling international payments, and Shopify apps used by more than 50,000 people a day.
5
Years Engineering
50K+
Daily Active Users
10+
Production Systems
Technical Expertise
Skills
Engineering
TypeScriptJavaScriptPythonJavaNode.jsReactNext.jsPostgreSQLRESTGraphQL
Architecture
System DesignMicroservicesDistributed SystemsAPIsEvent-Driven ArchitectureWebhooks
Infrastructure & AI
AWSGCPDigitalOceanDockerCI/CDNGINXKafkaRabbitMQRAGEmbeddingsVector Databases
also deep inShopify GraphQLStripePayPalRevolutRemixPuppeteerOpenAITechnical LeadershipCode Reviews
Career
Experience
Senior Software Engineer
CurrentMonday Digital Ltd·Bangladesh
50,000+ daily active users90% less manual coordinationAWS ECS, Lambda, RDS, S3
- ▸Built AI-powered SaaS platforms and internal tools using Node.js, React, PostgreSQL, RAG, embeddings, and vector databases; shipped a Slack automation app that summarizes channels and auto-assigns tasks, cutting manual coordination time by 90%.
- ▸Developed Shopify applications using GraphQL APIs, webhooks, and scalability-focused integrations; published apps on the Shopify App Store serving 50,000+ daily active users with optimized performance.
- ▸Owned system architecture, CI/CD, and AWS infrastructure (incl. ECS, Lambda, RDS, S3, IAM); ran a local NGINX staging server to cut costs, providing technical leadership and code reviews.
Node.jsReactPostgreSQLRAGVector DBsShopify GraphQLAWSDocker
Software Engineer
Softcent·Estonia (Remote)
International paymentsMicroservices on AWS
- ▸Engineered, maintained, and refactored SaaS, fintech, ERP, and communication platforms using Node.js, React, PostgreSQL, and microservices, deployed on AWS, serving thousands of users across cross-platform apps.
- ▸Developed payment and financial workflows with Stripe, PayPal, and Revolut, covering transactions, escrow, invoicing, and payouts, with software testing and technical documentation for API integrations.
Node.jsReactPostgreSQLMicroservicesAWSStripePayPalRevolut
Academics
Education
B.Sc. in Computer Science & Engineering
Green University of Bangladesh · 2018 - 2022
Selected Work
Projects
EmployeeEcho
AI Interview Platform
Architecture & Backend Lead
- Built an AI-powered technical interview platform that handles the full hiring loop, from job and candidate intake through invitations, scheduling and reminders, live AI-run interviews, and final candidate evaluation.
- Designed AI interview algorithms and job-specific assessment workflows, covering automated email delivery, authentication, OTPs, and structured hiring pipelines.
- Built caching for faster AI processing and camera-image verification for interview authenticity checks.
Node.jsMicroservicesPostgreSQLOpenAIZeptoMail
Visit Project
ChangeLogger
Shopify Public App
Full-Stack Owner · App Store published
- Built and published a Shopify App Store application that tracks changes across products, orders, collections, tags, themes, and other store resources for merchant auditing and operational visibility.
- Designed webhook processing and GraphQL integrations to capture store activity, persist event history in PostgreSQL, and provide searchable change records.
RemixPostgreSQLShopify GraphQLWebhooks
Visit Project
Revorium
Global Fintech Platform
Backend & Payments Engineering
- Developed backend services for a global fintech platform supporting real-time transfers, international payments, invoicing, and payout workflows across web and mobile applications.
- Built transaction services around Node.js microservices and PostgreSQL on AWS (ECS, RDS, IAM, SES for transactional alerts), integrating Stripe, PayPal, and Revolut for different financial workflows.
MicroservicesNext.jsPostgreSQLAWSStripePayPalRevolut
Visit Project
AdsPlanner
AI Ad Campaign Generation Platform
Platform Architecture & Pipelines
- Designed and built a SaaS platform that scrapes brand/product URLs via queued Puppeteer workers, then uses AI to generate ad campaign images and copy from extracted content.
- Designed image generation algorithms and a bulk media pipeline backed by S3 storage in AWS, producing ad creatives at scale across campaigns for multiple platform dimensions.
PuppeteerRabbitMQOpenAIPostgreSQLAWS S3
Visit ProjectCustom RAG agent · Built by me
Have a question?
Ask my AI.
It knows my work history, the systems I built, the stack I use, and what I am open to right now. Ask it a question and it answers the way I would. It can also set up a call.
Start Chatting
sumon.top/ai
U
What do you actually own day to day?
AI
The architecture and the infrastructure. I design the services, run our AWS setup (ECS, Lambda, RDS, S3), keep CI/CD healthy, and stay responsible for what ships. Lately that means RAG platforms, payment flows, and Shopify apps at over 50,000 daily users. I also lead code reviews for the team.
AI
Ask about Sumon…
It can schedule a call with me directly