You will get SaaS MVP Build Discovery — Next.js + NestJS + Stripe Path
Project details
A discovery + scoping path toward a multi-tenant B2B SaaS MVP on Next.js + NestJS + Postgres with Stripe billing. Starting deliverable: $500 scoping memo (3-5 business days). If you proceed to the 8-12 wk build, you get:
• Multi-tenant Postgres schema with row-level tenant isolation enforced at the DB layer, not bolted on at user 500
• NestJS backend with JWT-scoped tenant guards on every request
• Next.js frontend with route-level RBAC
• Stripe billing via idempotent webhooks; duplicate events don't double-charge
• Admin panel: user mgmt, billing, feature flags, analytics
• Onboarded into your Slack/Teams/Jira day one; weekly live demos
Most SaaS MVPs don't fail at the demo — they fail the first time production traffic hits. Auth breaks under concurrency, DB stops scaling, billing webhook double-charges. The version that holds is built with senior judgment in the room from day one.
10 years on production systems, 50+ shipped. Default architecture: row-level Postgres isolation w/ RLS. NestJS guards pull tenant from JWT.
Send a brief — product, user, first milestone. $500 credits toward kickoff.
• Multi-tenant Postgres schema with row-level tenant isolation enforced at the DB layer, not bolted on at user 500
• NestJS backend with JWT-scoped tenant guards on every request
• Next.js frontend with route-level RBAC
• Stripe billing via idempotent webhooks; duplicate events don't double-charge
• Admin panel: user mgmt, billing, feature flags, analytics
• Onboarded into your Slack/Teams/Jira day one; weekly live demos
Most SaaS MVPs don't fail at the demo — they fail the first time production traffic hits. Auth breaks under concurrency, DB stops scaling, billing webhook double-charges. The version that holds is built with senior judgment in the room from day one.
10 years on production systems, 50+ shipped. Default architecture: row-level Postgres isolation w/ RLS. NestJS guards pull tenant from JWT.
Send a brief — product, user, first milestone. $500 credits toward kickoff.
Programming Languages
JavaScript, Python, TypeScriptWhat's included $500
These options are included with the project scope.
$500
- Delivery Time 5 days
- Number of Revisions 0
- Number of Pages 3
About Qamer
Senior Software Engineer | SaaS & Mobile Apps | AI, React, Node.js
Houston, United States - 5:29 pm local time
10 years on production systems, 50+ projects shipped: SaaS platforms, web and mobile apps, AI agents and automations, and the data pipelines underneath them. I work with B2B SaaS, fintech, healthcare, logistics, and manufacturing teams across the US, EU, and MENA, and I lead every engagement personally at DatVerse — a small team of senior engineers picks up parallel workstreams when a build needs the pace.
Recent named work: CLEAQUES, a Laravel marketplace connecting African producers to the US/Canada diaspora; JDM Buy/Sell, a marketplace serving thousands of independent JDM sellers; On Target Clinical, an integrated EHR + billing + payroll platform for behavioral-health practices; and DFIN AI Services, backend AI for financial-filing ingestion and retrieval. Specific clients under NDA — anonymized case-study PDFs on request. Live links to each are in the portfolio below.
━━━ 1 · SaaS, web & mobile products ━━━
• Multi-tenant B2B SaaS with row-level access, subscription or usage-based billing, and idempotent Stripe webhooks
• Startup MVPs that hold up past launch
• iOS and Android apps: React Native as default, native Swift/Kotlin when the build needs it
• AI features inside live SaaS products: in-app chat, RAG search over a customer's own data (in-product, not standalone agents)
• Admin panels, APIs, and product-side backend services
Stack: React, NextJS, TypeScript, React Native, NodeJS, NestJS, PostgreSQL, Supabase, Stripe, AWS, Vercel
━━━ 2 · AI agents & workflow automation ━━━
• AI agents that pull from your CRM via API, enrich, decide, and write back: lead qualification, support routing, ops triage
• n8n, Zapier, and Make workflows that replace 5–20 hours of manual work per week
• Chatbots and Twilio Voice agents wired into booking and support systems
• Standalone RAG search and Q&A tools, with retrieval quality measured against ground truth, not asserted
Stack: n8n, LangChain, LangGraph, OpenAI API, Claude API, Python, Twilio, WhatsApp Business API, pgvector
━━━ 3 · data engineering & BI ━━━
• Cloud data warehouses on Snowflake, BigQuery, Databricks, or Microsoft Fabric — architected for cost and query performance
• ETL / ELT pipelines with ADF, dbt, and Airflow; warehouse migrations off Oracle, SQL Server, and Teradata
• Streaming pipelines on PySpark Structured Streaming
• Power BI and Tableau on a governed semantic model instead of 40 one-off dashboards
Stack: Snowflake, dbt, Apache Airflow, ADF, SQL, Python, Power BI, Tableau
━━━ who this is for ━━━
• Pre-seed to Series A founders shipping a first or second product
• Ops or RevOps leads automating a 20–100-person services business
• Data or analytics leads whose warehouse is slow, expensive, or no longer trusted
━━━ recent work ━━━
• A multi-tenant B2B SaaS, empty repo to first paying customers in around 10 weeks. Stripe billing, role-based access, Postgres, NextJS + NestJS
• An AI feature inside a live Series A SaaS product: RAG search over each customer's own uploaded documents, shipped as a paid-tier add-on
• A WhatsApp + Twilio Voice chatbot for a two-location clinic: books, reschedules, and escalates when needed — handling about 60% of after-hours inbound
• An n8n workflow routing quote requests for a services business: turnaround cut from 2 business days to under 3 hours for the 80% that classify cleanly
• A SQL Server + Oracle migration onto Snowflake with dbt and Airflow: the 4-hour nightly batch now finishes in under 30 minutes, with about 20% lower compute spend
• A Tableau consolidation: 40+ dashboards collapsed into a governed semantic model; multi-minute refreshes down to sub-minute
━━━ how I work ━━━
1. A 20-minute discovery call: the goal, the first milestone, and the failure mode worth worrying about
2. A $500 scoping memo — 3 pages: current state, proposed architecture, first-milestone breakdown with timeline and cost. Credited back if you proceed
3. A fixed-price first milestone (3–5 days). If what lands doesn't match the brief, the engagement stops there — you keep the work, I cover the time
4. Weekly demos in the live product, not a slide deck; async Loom updates and written notes between
5. Onboarding into your workspace (Slack, Teams, or Jira) from day one
6. Handoff with docs, CI/CD, and a 30-day support window: anything regressing from acceptance criteria fixed at no change order
If that's your build, send a short brief — we'll book 20 minutes to see if it's a fit, both sides.
Steps for completing your project
After purchasing the project, send requirements so Qamer can start the project.
Delivery time starts when Qamer receives requirements from you.
Qamer works on your project following the steps below.
Revisions may occur after the delivery date.
You send a short brief
The product, the user you want to serve first, the first milestone you want to range.
20-min discovery call + $500 scoping memo (3-5 business days)
We scope workflow, integrations, and first milestone. Memo: stack (Next.js + NestJS + Stripe + Postgres), first-milestone breakdown, fixed-price range.