S M Nowshadur Rahaman

Backend / Platform Engineer
+880 1851 836744nowshad.rahaman@gmail.comRampura, Dhaka, BangladeshLinkedIn·GitHub·TopCoder

Professional Overview

Backend engineer with 11+ years building APIs, services, and data platforms on Node.js, .NET Core, and serverless runtimes. Deep experience with Postgres, Kafka, Redis, Cosmos DB, ClickHouse, and event-driven architectures.

Core Competencies

Architecture:Microservices, Serverless, CQRS, SaaS Platforms, Edge-first Design
Cloud Platforms:AWS (Lambda, EC2, S3, RDS, CloudFront, SNS, SES), Azure (Functions, Blob, Cosmos DB), Cloudflare (R2, KV, Durable Objects)
Languages:JavaScript, TypeScript, C#, Python, Java, Go, SQL
Backend:Node.js, .NET Core, Express, HonoJS, Next.js, FastAPI
Realtime:Kafka, Redis, Supabase, RabbitMQ, Ably
Data:Microsoft SQL Server, PostgreSQL, MySQL, ClickHouse, Cosmos DB, DynamoDB
DevOps & Observability:CI/CD Pipelines, Docker, Terraform, GitHub Actions, Azure DevOps, Datadog (RUM, Tracing), CloudWatch, App Insights

Professional Experience

AdoptSequence & AdoptIQ (Curtis Digital Inc.) — Remote
Solution ArchitectOct 2023 – May 2025

Led architecture and platform engineering for two SaaS products: an onboarding/automation platform and an A/V enhancement workflow service.

  • Led backend migration of AdoptSequence from AWS Lambda → Trigger.dev to support long-running video processing.
  • Architected end-to-end audio/video enhancement workflows using FFmpeg, Whisper, and AI voice synthesis.
  • Integrated Supabase for real-time sync and Postgres storage; replaced Ably, lowering latency and cost.
  • Operationalized RUM + APM in Datadog with CloudWatch signals; guided devs to review error patterns, improving iteration speed by ~50%.
  • Implemented PostHog-based interaction analytics with Kafka ingestion, ClickHouse OLAP, and Redis caching; authored the event schema and ETL, reducing time-to-activation and improving onboarding efficiency.
  • Owned the full DevOps lifecycle: CI/CD pipelines, infrastructure automation, deployment strategy, monitoring, and cloud cost optimization across AWS and Cloudflare.
  • Managed multi-repo codebases on GitHub with standardized PR reviews and automation.
  • Mentored junior developers, enforced best practices, and led roadmap execution with founders.
  • Integrated Clerk authentication across multiple applications.
Tech Stack
TypeScript, JavaScript, Node.js, React, Remix, Lit, Astro, Next.js
FFmpeg, OpenAI Whisper, Trigger.dev, Clerk
Supabase (Postgres, Realtime), Kafka, Redis, ClickHouse
AWS (Lambda, EC2, S3, RDS, CloudFront), Cloudflare (Workers, Durable Objects, R2)
PostHog, Datadog, CloudWatch, GitHub Actions, Docker
Colliers International (via TopCoder) — Remote
Senior Full-stack DeveloperOct 2021 – Sep 2023

Modernized internal apps for a global commercial real-estate firm, replacing third-party tools with Azure-native and AWS-native services.

  • Replaced a 3rd-party valuation tool with an internal AWS solution (EC2, S3, SES, RDS) in 3 weeks; cut vendor cost ~60–80% and absorbed additional developer cost solo.
  • Architected microservices on Azure Functions backed by Cosmos DB + SQL Server; reduced API p95 latency ~30–50%.
  • Implemented IaC + CI/CD with Terraform and Azure DevOps.
  • Mentored engineers and led POCs with architects/BAs; reduced new-hire ramp ~30–50% and accelerated concept-to-pilot ~2x.
  • Drove code reviews and onboarding standards; PR cycle time −20–35%, post-release defects −20–40%.
Tech Stack
.NET Core, Azure Functions, Cosmos DB, SQL Server, Service Bus
GraphQL, Power BI, Mapbox, Syncfusion
AWS (RDS, EC2, S3, SES), Azure DevOps, Terraform
NestJS, MySQL
Relisource Inc. — Dhaka, Bangladesh
Senior Software EngineerNov 2018 – Aug 2021
  • Developed a Clinical Trial Management System for a global pharmaceutical client.
  • Actively mentored team members on architecture and clean code practices.
Tech Stack
ASP.NET Core, Azure Functions, Azure Service Bus, Microsoft SQL Server
Astha IT — Dhaka, Bangladesh
Senior Software EngineerMar 2014 – Oct 2018
  • Led development for enterprise systems in logistics, education, and fintech.
  • Mentored junior engineers and participated in system architecture, client demos, and delivery cycles.

Projects

FinSync — Personal Finance Intelligence↗

Elastic Serverless data streams + Vertex AI. Hybrid search (keyword + vector), monthly transforms, and a RAG chat layer. Pydantic-validated JSON ingestion.

Education

Bachelor of Computer Science and Engineering
Shahjalal University of Science and Technology · 2013