Backend/API implementation

Backend APIs, automations, AI workflows

I help no-code agencies, AI automation shops, and SaaS founders ship the backend parts that get messy: custom APIs, webhooks, CRM integrations, background jobs, MVP foundations, and AI voice workflows.

Available for fixed-scope sprints and white-label agency support.

Portrait of Saurav Sharma

Built backend systems for

  • lead routing into HubSpot, Zendesk, email, and WhatsApp
  • real-time AI voice workflows with FastAPI, LiveKit, Telnyx, Deepgram, ElevenLabs, and OpenAI
  • payroll SaaS features, tax reports, employee benefits, and backend refactors
  • AI candidate-job matching and recruiting workflow integrations
Python Django FastAPI PostgreSQL Redis Celery OpenAI APIs LiveKit / Telnyx Vue Python Django FastAPI PostgreSQL Redis Celery

Who I help

For agencies

If you sell automations but need real backend help

You can build the frontend, workflow, or client relationship. I handle the backend/API layer when a project needs more than Zapier, Make, Bubble, Airtable, or a few scripts.

  • custom APIs and webhook handlers
  • HubSpot, Zendesk, WhatsApp, Slack, Stripe, or OpenAI integrations
  • retries, logs, queues, and background jobs
  • a backend that does not fall apart after handoff
I need backend support

For founders

If you are trying to ship v1

I help SaaS and AI founders build the backend foundation for MVPs and early product features.

  • Django or FastAPI backend
  • database schema, auth, admin, and APIs
  • async jobs with Celery/Redis
  • AI features connected to real product workflows
I need an MVP sprint

Fixed-scope build sprints

No vague hourly work. No endless discovery. We pick one clear backend outcome, scope it properly, and ship it.

$750-$3,500

Backend rescue sprint

For broken automations, webhook issues, slow no-code workflows, or fragile API glue.

  • failed webhooks
  • missing logs and retries
  • unreliable Zapier/Make flows
  • brittle API scripts
$2,000-$4,000

Custom integration sprint

For agencies or founders who need systems to talk to each other properly.

  • HubSpot and Zendesk workflows
  • Stripe events
  • Slack alerts
  • OpenAI workflows connected to CRM data
$3,000-$6,000

AI / voice backend sprint

For AI products, automation agencies, and voice agent workflows that need production backend work.

  • FastAPI voice backend
  • LiveKit, Telnyx, Deepgram, ElevenLabs, OpenAI
  • transcript logging
  • tool calls and webhook actions
$5,000-$8,000

MVP foundation sprint

For founders who need a backend-heavy v1 without hiring a full-time engineer.

  • Django/FastAPI backend
  • PostgreSQL schema
  • auth, admin, and APIs
  • deployment and handoff docs

Agency support

White-label backend help for no-code and AI automation agencies

Sometimes the client asks for something that does not fit neatly inside Bubble, Webflow, Airtable, Zapier, Make, or n8n.

I can plug into your project quietly and handle the backend layer while you keep the client relationship.

Common use cases:

  • replace a fragile automation with a small custom backend
  • build the API layer behind a Webflow or Bubble frontend
  • connect client tools that do not have clean native integrations
  • support an AI automation or voice agent project after the demo stage
  • help estimate technical scope before you quote the client

Founder support

Backend implementation for founders who need to ship

If you already have the idea, users, design, or early customer pressure, I can help turn the backend into something real.

I am probably not the best fit if you only need a marketing website, a pixel-perfect design system, or an equity-only cofounder.

I am strongest when the product needs:

  • APIs and data models
  • background jobs
  • dashboards and admin tools
  • third-party integrations
  • real-time features
  • AI/LLM workflows or voice API orchestration

Selected work

LeadPlane preview

LeadPlane

Built backend automation for routing Facebook leads into HubSpot, Zendesk, email, and WhatsApp with Django, Celery, Redis, PostgreSQL, and third-party integrations.

DjangoCeleryRedisHubSpot
View project
Voice AI

Generative Studio

Building backend services for real-time AI voice workflows with FastAPI, LiveKit, Telnyx, ElevenLabs, Deepgram, OpenAI APIs, and low-latency orchestration.

FastAPILiveKitTelnyxOpenAI
The Payroll App preview

The Payroll App

Built and maintained Django features for a payroll SaaS handling payroll, tax reports, employee benefits, backend refactors, and test coverage.

DjangoPostgreSQLpytestHTMX
View project
Recruiting AI

Fillyouin

Built AI candidate-job matching, CKEditor email templates, Google Calendar integration, and Jitsi meeting workflows for a recruiting product.

DjangoOpenAICalendar APIJitsi
Lazy Planner preview

LazyPlanner

Building a planning app with third-party integrations, AI tagging, scheduling logic, Django Channels, Celery, PostgreSQL, Vue, and Linux deployment.

DjangoVueChannelsCeleryAI tagging
View project

How a sprint works

01

Send the workflow or product scope

A short note is enough. Tell me what you are trying to build, what tools are involved, and what is currently manual or broken.

02

I map the backend work

I identify the core workflow, risky parts, integrations, missing data, and what should be included or excluded from v1.

03

You get a fixed scope

You get a simple written scope with deliverables, timeline, price, assumptions, and access needed.

04

I build with async updates

You get short progress updates, a midpoint demo where useful, and a final walkthrough.

05

Handoff is included

You get the code, setup notes, handoff docs, and a short Loom walkthrough. Fixed sprints include a small bug-fix window.

Typical project ranges

Backend rescue sprint$750-$3,500
Custom integration sprint$2,000-$4,000
AI / voice backend sprint$3,000-$6,000
MVP foundation sprint$5,000-$8,000
White-label backend retainer$1,500-$4,000/month

Fixed projects are usually 50% upfront and 50% before final handoff. Retainers are billed monthly upfront. If the scope is unclear, we can start with a paid technical audit or small trial sprint.

Questions I get

Why not just use Zapier or Make?

Use them when they work. But once a workflow needs custom state, retries, logs, permissions, large data syncs, webhook reliability, or product-specific logic, a small backend is usually cleaner and cheaper to maintain.

Can you work white-label?

Yes. I can work behind the scenes for agencies. You keep the client relationship. I handle the backend/API implementation.

Can you join an existing project?

Yes, if the scope is clear and the codebase is workable. I can work inside an existing Django, FastAPI, or Python backend, or build a small service around the current system.

Can you build the full MVP?

Yes, if it is backend-heavy and scoped properly. I am a strong fit for SaaS dashboards, internal tools, workflow products, APIs, and AI features.

Have a backend workflow that needs to ship?

Send the product, client project, or workflow you are trying to build. I will reply with the best first sprint to scope, what I would cut from v1, or a straight no if I am not the right fit.