Nodejs Backend developer

5 days ago

Rawalpindi, Punjab, Pakistan withRetailAI Full time 1,200,000 - 2,400,000 per year

About RetailAI

RetailAI builds multi-agent automation for e-commerce brands across WhatsApp, Instagram, Facebook Messenger, email, and voice. We stitch together LLMs, real-time messaging, and storefront/ops data to resolve customer queries, drive conversions, and automate logistics.

Role Overview

You'll build backend services, tools, and function integrations that power our AI agents—especially OpenAI tool/function calling, message webhooks, and data pipelines. You'll own services from design → implementation → deployment → observability, and collaborate closely with our AI/agent and frontend teams.

What You'll Do

  • LLM & Tools
  • Design and implement OpenAI function/tool schemas
    (TypeBox/JSON) for agent actions (order tracking, returns/exchanges, product search, ticketing, courier selection, etc.).
  • Build
    tool runtimes
    and guardrails (timeouts, retries, circuit breakers, input/output validation, JSON coercion).
  • Implement
    prompt/runtime orchestration
    (system prompts, user context injection, tool selection logic, audit logs, token cost tracking).
  • Platform Integrations
  • Own Meta Graph/WhatsApp Cloud API
    webhooks (messages, reactions, comments), Instagram/Messenger subscriptions, thread control.
  • Ship
    Shopify Admin & Storefront GraphQL
    integrations (orders, carts, products, discounts, abandoned carts).
  • Integrate
    email (Gmail/Outlook)
    and
    voice (LiveKit Agents / SIP over WebRTC)
    where needed.
  • Data & Infra
  • Design MongoDB schemas and composite/TTL indexes
    , add archiving strategies, and create analytics/aggregation pipelines.
  • Build
    queues/workers
    (Redis/Bull) for async jobs (webhook ingestion, enrichment, syncs).
  • Add
    observability
    (structured logs, metrics, tracing) and
    SLOs
    ; implement alerts on latency, error rates, and queue depth.
  • Reliability & Security
  • Harden APIs with authN/authZ
    , rate limits, idempotency keys, and signed webhooks.
  • Own
    CI/CD
    pipelines, containerization, and zero-downtime deploys on GCP.
  • Developer Experience
  • Create internal SDKs/clients, codegen for tool schemas, and example recipes/playbooks for adding new agent tools fast.

Tech You'll Use (day-to-day)

  • (TypeScript), FeathersJS v5
    , app routes for thin APIs when needed
  • MongoDB (Atlas + local), Redis/Bull
    , Nginx, GCP (VMs, storage), Docker
  • OpenAI APIs
    (function/tool calling, embeddings), Pinecone (or similar vectordb)
  • Shopify GraphQL Admin
    ,
    Meta Graph/WhatsApp Cloud API
    , Gmail/Outlook
  • LiveKit Agents / WebRTC
    (nice-to-have), Webhooks at scale
  • Cursor / Claude / Aider etc
  • Testing: Vitest/Jest, supertest; Linting/Types; GitHub Actions

Requirements

  • 3–6+ years building production backend services in

    .
  • Strong with
    API design
    , async job processing, and data modeling for
    MongoDB
    .
  • Experience with
    LLM integrations
    (OpenAI) and
    JSON function/tool schemas
    .
  • Comfortable with
    webhooks
    ,
    OAuth
    , signed requests, retries, and idempotency.
  • Solid
    testing
    habits,
    observability
    mindset, and performance tuning (indexes, memory, slow queries).
  • Security basics: secret management, token scopes, least privilege, input validation.

Nice-to-Have

  • FeathersJS v5, Multi-tenant SaaS patterns, RBAC
  • Shopify Admin GraphQL apps, discount codes, order edits, abandoned carts
  • Meta Graph API, WhatsApp Cloud API message types and media
  • LiveKit/WebRTC/SIP bridges; voice AI pipelines
  • Vector DBs (Pinecone/pgvector),
    semantic search
    indexing pipelines

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