Anisur Rahman
Verified Expert in Engineering
Back-end Development Developer
San Francisco, CA, United States
Toptal member since May 6, 2025
Anisur is a full-stack AI engineer with 6+ years of experience building production-grade AI agents, agentic systems, and RAG pipelines. At Gerald (YC W21), he shipped AI systems that saved $900,000+ annually, built a content engine generating 2,500+ posts per hour, and deployed AI agents for real-time analytics, driving $1+ million in monthly GMV. Anisur brings extreme ownership to every engagement, from architecture to deployment.
Portfolio
Experience
- Python - 8 years
- Back-end Development - 6 years
- Node.js - 5 years
- Full-stack - 5 years
- Artificial Intelligence (AI) - 4 years
- Machine Learning - 3 years
- Prompt Engineering - 3 years
- AI Agents - 2 years
Preferred Environment
MacOS, Cursor AI, GitHub, Slack
The most amazing...
...project I built is an AI content engine (YC startup) generating 2,500+ blog posts per hour that replaced an $8,000 per month agency and drove $1+ million GMV.
Work Experience
Back-end Software Engineer
Gerald (YC W21)
- Designed a BNPL scoring service (FastAPI + PostgreSQL) that processes 90‑day bank data in < 2s, cutting approval latency by 60 %.
- Integrated Amazon & Walmart inventory via Zinc APIs, boosting cart‑to‑purchase conversion from 32 % → 48 % for 10,000+ users.
- Implemented a Redshift‑to‑Bedrock RAG pipeline with Slack alerts that flag checkout anomalies within 2 min, reducing outages by 40 %.
- Reduced gift‑card fraud losses by 35 % through real‑time risk rules built on Segment events, Lambda, and Datadog.
- Containerised legacy services with Docker & Terraform (ECS Fargate), shrinking deploy time from 40 min → 8 min.
Software Engineer
Re:cruit
- Delivered 12 production REST / GraphQL APIs for YC clients, sustaining 99.9 % uptime on 5+ million monthly requests.
- Migrated a monolith to Docker + ECS Fargate with Terraform, slashing deploy time from 40 min → 8 min and infra costs by 25 %.
- Raised back-end test coverage to 85 % with Jest & Cypress, cutting staging regressions by 60 %.
- Implemented NextAuth‑based OAuth flows, onboarding 30,000 users securely in the first quarter.
- Mentored four junior engineers on TypeScript best practices and AWS cost hygiene, boosting feature velocity by 20 %.
- Optimised PostgreSQL queries via EXPLAIN plans and indexing, shrinking P95 response times from 900 ms → 240 ms.
Back-end Software Engineer (Contract)
Edlyft
- Automated YouTube‑style thumbnail sprite gen with Node.js, ffmpeg, Lambda & S3, saving 15 hr/week of manual editing.
- Created a Twilio SMS bot to collect grades & attendance, raising student response rate from 45 % → 88 %.
- Orchestrated serverless workflows that automated 95 % of admin tasks across Slack, Airtable & Google Suite.
- Synced course metrics to Airtable dashboards via FastAPI, enabling near real‑time performance tracking for staff.
- Instrumented CloudWatch & Datadog traces; drove a 30 % drop in mean incident resolution time.
Full-stack Software Engineer
SJ Innovation LLC
- Developed and delivered 3 fairly large and complex admin interfaces for different clients.
- Designed and implemented fast and secure REST APIs to handle 100k+ users.
- Managed 2 interns, mentored them with on communications and reviewed/refactored their code.
Full-stack Engineer
Social Energy
- Implemented PWA, helping hundreds of homeowners keep track of their solar and battery storage.
- Led rewriting of the REST API back end from legacy PHP to TypeScript.
- Built an end-to-end admin panel system to track all users, employees, and venture information.
Experience
Gerald BNPL & Checkout Automation
https://joingerald.com• Designed and built a Python + FastAPI micro‑service that ingests 90 days of Plaid bank data, applies risk rules and machine‑learning scores, then returns a limit decision in < 2 seconds—cutting approval latency by 60 %.
• Integrated Zinc search/offers APIs to unlock Amazon & Walmart inventory; cart‑to‑purchase conversion climbed from 32 % → 48 % across 10 K shoppers.
• Streamed Redshift metrics to Amazon Bedrock RAG agents that post Slack alerts when funnel steps breach a 2‑hour baseline, catching revenue regressions 40 % faster.
• Containerised legacy services with Docker + Terraform (ECS Fargate); deploy time fell 40 min → 8 min and monthly infra spend dropped 25 %.
• Implemented Datadog traces and SLO dashboards, reducing mean time to recovery from 45 → 18 minutes.
Minutes Lite — AI Meeting Notes Automation (Side Project)
https://minitues-lite.vercel.app1️⃣ records the call,
2️⃣ streams audio to Amazon Transcribe for live captions,
3️⃣ runs a LangChain RAG pipeline (Pinecone + Bedrock) to extract key decisions, action items, and deadlines,
4️⃣ posts a Markdown digest to Slack / e‑mail and can open Linear or GitHub issues automatically.
ContentCued — AI‑driven SEO Blog Automation (Side Project)
https://contentcued.comBeta results after 3 months:
• 150+ live articles
• ≈ 1,800 organic sessions/day
• 2.7 % click‑to‑Amazon and 5 % order conversion, generating ≈ $900 / mo passive revenue.
I handled ideation, architecture, pipeline scripting, and performance tuning end‑to‑end.
Education
Bachelor's Degree in Computer Science
Metropolitan University - Sylhet
Higher Secondary in Science
Scholarshome - Sylhet
Certifications
Node.js : Security
LinkedIn Learning
Skills
Libraries/APIs
Node.js, ArcGIS, FFmpeg, Slack API, React
Tools
GitHub, ChatGPT, Slack, Amazon CloudWatch, Terraform, Amazon Elastic Container Service (ECS), Amazon Transcribe, n8n, Lighthouse, Git
Languages
Python, JavaScript, SQL, HTML, CSS, TypeScript, Python 3, PHP
Frameworks
Next.js, Glide, NestJS, Jest, Cypress, Tailwind CSS, Express.js, JSON Web Tokens (JWT), LangGraph, React Native, Svelte
Paradigms
Microservices Architecture, Search Engine Optimization (SEO)
Platforms
MacOS, AWS Lambda, Docker, Twilio, Vercel, Langfuse, WordPress, Shopify, iOS, Amazon Web Services (AWS)
Storage
PostgreSQL, Amazon S3 (AWS S3), Redshift, Datadog, MySQL
Other
FastAPI, AI Agents, Prompt Engineering, Artificial Intelligence (AI), Full-stack, Back-end Development, Machine Learning, Translation, WhatsApp, React Native Reanimated, Secure Software Development Lifecycle (SSDLC), APIs, Charts, Dashboard Design, Data Visualization, Code Review, Software Development, Cursor AI, Runtime Debugging, Containerization, Generative Artificial Intelligence (GenAI), LangChain, Accessibility, Security, Data Annotation, PostgreSQL 9, ECS, Segment, Airtable, Amazon Bedrock, Pinecone, Prismic, OpenAI API, Server-side Rendering (SSR), Secure Coding, Helmet.js, Authorization, Security Testing, Authentication, Performance, Communication, API Design, API Testing, Large Language Models (LLMs), Generative Pre-trained Transformers (GPT), Web Development
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring