
Mohd Kamran Tahir
Verified Expert in Engineering
Back-end Developer
Delhi, India
Toptal member since June 4, 2024
Kamran is a senior back-end and platform engineer with 6 years years of experience building high-throughput services, event-driven systems, APIs, SDKs, and cloud-native platforms. He specializes in Go, Node.js, TypeScript, PostgreSQL, AWS, Kafka, and Kubernetes, with production experience across fintech, AI/OCR, LLM workflows, and developer tooling.
Portfolio
Experience
- Amazon Web Services (AWS) - 6 years
- TypeScript - 6 years
- Back-end - 6 years
- Node.js - 6 years
- PostgreSQL - 6 years
- Microservices - 6 years
- APIs - 6 years
- Go - 5 years
Preferred Environment
Windows, Linux, MacOS
The most amazing...
...thing I've built is a one-click WhatsApp login system that made authentication near-instant for 40+ million users.
Work Experience
Member of Technical Staff
Trelium
- Contributed to Trelium's AI agent platform, turning plain-English workflow descriptions into automations that run across business apps.
- Built product surfaces and platform workflows with TypeScript, Next.js, React, and PostgreSQL for a YC-backed, fast-iterating engineering team.
- Integrated reliable data and task flows for branded merchandise operations, reducing repetitive order-entry and quote-creation work.
Founder & Lead Back-end Engineer
LeapOCR
- Architected and deployed a highly concurrent document extraction platform using Go, orchestrating complex multi-engine asynchronous workflows (Vision OCR and LLM QA) to achieve 99.9% data accuracy.
- Implemented Temporal.io to manage robust, fault-tolerant job queues, ensuring reliable state management, automated retries, and zero dropped payloads during high-traffic spikes.
- Engineered an event-driven webhook architecture and developed official type-safe SDKs (Go, Python, and TypeScript) to allow seamless, sub-50ms latency integrations for enterprise clients.
- Designed a strict zero data retention pipeline processing 50,000+ documents per week.
Senior Software Engineer (Back end)
Zeller
- Led the back-end integration of Tevalis POS with Zeller’s distributed ecosystem, engineering fault-tolerant data synchronization across multiple point-of-sale architectures.
- Architected and deployed highly available microservices using Go, Node.js, and AWS, significantly improving data consistency across the payments network.
- Optimized infrastructure, multi-layer caching, and parallelized workflows, successfully slashing CI/CD build and test execution times from 40 minutes to 8 minutes.
- Strengthened system reliability by expanding automated integration testing coverage for critical back-end services, eliminating high-severity post-deployment regressions.
Software Development Engineer II
ShibaInu
- Developed an end-to-end analytics pipeline using AWS (API Gateway, Kinesis Firehose, AWS Glue, S3, and Athena), processing over 100,000 events per minute, ensuring high scalability and performance.
- Implemented supporting service and UI integrations with React, Next.js, and TypeScript across the analytics and ads platform.
- Built and scaled high-throughput data ingestion microservices using Go and NATS.io, ensuring zero data loss during traffic spikes.
- Developed a centralized Ads and Analytics SDK back end in TypeScript to standardize real-time event tracking and analytics aggregation.
- Streamlined DevOps operations by refactoring Dockerfiles and containerization strategies, reducing average image sizes by 80–90% and decreasing deployment times.
- Delivered production services across Node.js, React, Next.js, Go, TypeScript, NATS.io, PostgreSQL, and AWS in a fast-moving product environment.
Back-end Developer
GoKwik
- Architected an event-driven Kafka queue system for high-volume webhook consumption, ensuring reliable, decoupled message processing between Shopify, WooCommerce, and internal microservices.
- Spearheaded the back-end system design of a new partial payments architecture using Node.js, TypeScript, and PostgreSQL, driving a 20%+ reduction in order cancellations.
- Migrated critical components from a monolithic service to a microservice architecture with Node.js, React, Go, and Docker, enhancing scalability, fault isolation, and debugging efficiency.
- Developed highly concurrent back-end services to support a one-click WhatsApp login feature, successfully handling traffic from an active user base of over 40 million.
- Implemented end-to-end feature delivery across Node.js, TypeScript, React, Go, Kafka, Redis, MongoDB, and PostgreSQL for scalable checkout services.
- Collaborated across back-end, infrastructure, and integration layers using Kafka, AWS, Jenkins, Redis, MongoDB, and PostgreSQL to ship resilient commerce services.
Full-stack Developer
Deloitte
- Played a key role in developing custom pages with mobile-first, responsive designs using React for a white-label solution, consistently delivering high-quality work within tight deadlines.
- Modernized the legacy codebase by porting jQuery/JS components to ReactJS, significantly improving the developer experience and accelerating the development process.
- Developed high-performance, scalable solutions using AWS Lambdas for serverless functions, ensuring efficient and optimized execution.
- Worked alone on an initiative to improve build times, achieving a 10x reduction and significantly enhancing developer experience and productivity.
- Utilized Node.js, TypeScript, AWS Lambda, DynamoDB, React, jQuery, and SCSS to deliver robust and efficient solutions, integrating various third-party REST APIs.
Web Developer
Hackstrap
- Implemented strategic front-end optimizations for better SEO, increasing customer acquisition and improving search engine rankings, thereby driving organic growth.
- Developed and integrated various data visualization pages using optimal React-based libraries, significantly improving client information accessibility.
- Demonstrated proficiency in front-end development techniques and leveraged React to create visually appealing and interactive user interfaces.
Experience
ReviewHQ
The application integrates quality assurance (QA) to maintain high standards and offers an easy user funnel for a seamless review submission process. Additionally, it provides tools for analyzing user thoughts, automatically extracts key topics from reviews, and reports on any issues, helping to gain valuable insights and address customer concerns efficiently.
ReMTL
Users can review per novel, comment per chapter, upvote, downvote, etc.
LeapOCR
Tafsir API
https://github.com/spa5k/tafsir_apiuids-postgres
https://github.com/spa5k/uids-postgresNext.js App Router Electron
https://github.com/spa5k/nextjs_approuter_electronEducation
Bachelor of Technology (BTech) in Computer and Information Sciences
Dr. A.P.J. Abdul Kalam Technical University - Lucknow, India
Skills
Libraries/APIs
Node.js, React, REST APIs, WhatsApp API
Tools
GoLand, AWS Glue, TanStack Router, AWS IAM
Languages
Go, TypeScript, JavaScript, Rust, CSS
Paradigms
Microservices, Event-driven Architecture, Model Context Protocol (MCP), DevOps
Storage
PostgreSQL, MongoDB, Redis, NoSQL, Datadog, Amazon DynamoDB, Amazon S3 (AWS S3)
Frameworks
Tailwind CSS, Electron, Next.js
Platforms
Apache Kafka, Amazon Web Services (AWS), AWS Lambda, Windows, Linux, AWS IoT, MacOS, Kubernetes, Docker, Temporal Cloud
Other
Large Language Models (LLMs), SDKs, Full-stack, Back-end, CI/CD Pipelines, APIs, Full-stack Development, API Integration, Third-party Integration, AI Tools, Workflow Automation, Vibe Coding, Back-end Development, Containers, Multi-tenant SaaS, Authentication, Third-party APIs, Lambda Functions, Payments, Fintech, eCommerce, Artificial Intelligence (AI), Distributed Systems, Supabase, Agentic AI, Product Management, Software Architecture, Communication, Amazon Bedrock AgentCore, AI Agents, Document Parsing, Data Extraction, Software Development, SaaS, API Gateways, Architecture, Amazon Kinesis, Cloudflare, Search Engines
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