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Stack ForgedSF

Stack Forged

Backend Engineer | API, AI Integration, LLM

€131/day
Kolkata, IN
3-7 years

Average response time: 12 hours

About Stack

I help startups build and fix backend systems — APIs, integrations, and scalable infrastructure — so they can ship faster without breaking things.

I’ve worked on production SaaS platforms handling high traffic, automation workflows, and AI-powered features. Most of my work involves fixing slow or messy backends, building clean API systems, and setting up reliable architectures that scale.

Tech-wise, I work mainly with Node.js, PostgreSQL, queues, and cloud systems. I also integrate AI features (LLMs, automation pipelines, internal tools) when they actually solve a business problem — not just for hype.

Typical work:
  • API development & backend systems
  • Fixing performance and scaling issues
  • SaaS backend from MVP → production
  • AI integrations & automation workflows
  • Collaborat with frontend team or integrate frontend with backend.

If your backend is slowing your product down or becoming hard to manage, I can step in and clean it up quickly.
  • English

    Native or bilingual

  • Hindi

    Basic

  • Bangla

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • StepsToHebrew
    Full-Stack Developer (Remote)
    EDUCATION AND E-LEARNING
    January 2026 - Today (7 months)
    Technical partner for an AI-driven Hebrew learning platform focused on structured, scalable language training.
    • Designed and implemented a fully dynamic AI-assisted quiz generation system, supporting multiple quiz types and adaptive learning flows based on content and learner progress.
    • Built AI-powered transcription and translation pipelines for audio and video content, including near-accurate automated outputs with user-friendly manual editing tools for refinement and validation.
    • Developed interactive writing and practice tools, including canvas-based assistance for letter and word writing, and AI-guided avatar-style training experiences to support structured vocabulary and language acquisition.
    artificial intelligence AI Automation Node.js Laravel
  • Algoed.co
    Backend Developer (Remote)
    EDUCATION AND E-LEARNING
    November 2023 - December 2025 (2 years and 1 month)
    Technical partner for a serverless, high-traffic quiz platform designed to handle sudden usage spikes reliably.

    • Designed and implemented a zone-based, serverless backend architecture to reliably handle sudden high traffic spikes without downtime.
    • Built automated quiz ingestion pipelines, including AI-assisted import of structured content from DOCX, reducing manual content creation and scaling effort.
    • Built a scalable certification ranking system with country, regional, and global leaderboards, enabling standardized performance comparison based on scoring.
    Serverless artificial intelligence Node.js MongoDB SQL
  • HebreuAvecDan
    Backend & Platform Partner (Remote)
    EDUCATION AND E-LEARNING
    January 2023 - October 2023 (9 months)
    Long-term technical partner for a Hebrew e-learning platform serving French-speaking users.
    • Designed and maintained a full-featured learning platform (content, quizzes, user management, payments).
    • Built scalable backend services and custom integrations to support high SEO traffic and consistent growth.
    • Worked closely with the founder on product decisions, performance optimisation, and reliability.
    • Platform achieved top Google rankings in its niche and supports ongoing content and feature expansion.
    artificial intelligence

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Education

  • BSC
    University of Burdwan
    2020
    BSC

Skill set

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