I am a backend engineer focused on building production-style systems with Node.js, TypeScript, Go, and PostgreSQL. I specialize in multi-tenant infrastructure, authentication and authorization, asynchronous job pipelines, vector search, concurrency control, and secure service integrations.…

Md. Shahrier Islam Alif

I am a backend engineer focused on building production-style systems with Node.js, TypeScript, Go, and PostgreSQL. I specialize in multi-tenant infrastructure, authentication and authorization, asynchronous job pipelines, vector search, concurrency control, and secure service integrations.…

Available to hire

I am a backend engineer focused on building production-style systems with Node.js, TypeScript, Go, and PostgreSQL. I specialize in multi-tenant infrastructure, authentication and authorization, asynchronous job pipelines, vector search, concurrency control, and secure service integrations.

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Skills

Experience Level

PostgreSQL
Expert
API
Expert
Node.js
Expert
SQL
Expert
TypeScript
Expert
Go
Expert
JavaScript
Expert
Docker
Expert
GitHub
Expert
Redis
Expert
AWS
Intermediate
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Language

English
Advanced

Work Experience

Add your work experience history here.

Education

BSc in Computer Science at Rajshahi University of Engineering and Technology (RUET)
January 11, 2030 - January 1, 2029
Bachelor of Science in Computer Science at Rajshahi University of Engineering and Technology (RUET)
January 11, 2030 - January 1, 2029

Qualifications

Add your qualifications or awards here.

Industry Experience

Computers & Electronics, Software & Internet, Professional Services
    Summerizer

    Developed a scalable backend system in Go featuring async job pipelines, concurrent worker pools, PostgreSQL, pgvector, and semantic search. Implemented LISTEN/NOTIFY scheduling, optimistic locking, retries, and background processing to improve reliability and prevent race conditions. Achieved 0.923 Hit@1 retrieval accuracy while reducing idle database polling by ~12x. Includes REST APIs, authentication, source processing, and deployed production-style infrastructure.

    AgentGate

    Built a multi-tenant MCP gateway in Node.js/TypeScript that centralizes authentication, authorization, rate limiting, audit logging, and observability for AI-agent tool access.

    • Proved tenant isolation across REST, MCP, WebSocket, and audit surfaces
    • Implemented DNS-rebinding-aware SSRF protection
    • Load-tested 50 concurrent agents / 3,500+ requests and fixed a rate-limiter correctness bug
    • Achieved 45ms p95 gateway overhead against a 300ms budget
    • Rebuilt the transport after MCP deprecated the original design mid-build