You will get Bug Fix & Features addition to Your Node.js / React / NestJS / Next.js App
Project details
Stuck on a bug? Blocked on a feature? I'll unblock you - fast.
I fix bugs and implement features in Node.js, NestJS, Express, React and Next.js apps. Clear scope, fast turnaround, clean solution - no bloated retainers.
What I handle:
✔ Bug diagnosis & root cause fix (not just symptoms)
✔ New feature implementation to your spec (new API + UI)
✔ API issues — broken endpoints, auth errors, data bugs
✔ Frontend bugs — React state, routing, rendering issues
✔ Performance issues — slow queries, memory leaks, N+1s
✔ TypeScript errors & refactors
✔ Integration bugs — third-party APIs, webhooks, payments
How it works:
→ You describe the bug or feature
→ I give you a clear diagnosis + fix plan
→ I implement, test, and deliver with a Loom walkthrough
Built production systems handling 50K+ users. I know where bugs hide.
📌 Describe your issue - I'll tell you if I can fix it today.
I fix bugs and implement features in Node.js, NestJS, Express, React and Next.js apps. Clear scope, fast turnaround, clean solution - no bloated retainers.
What I handle:
✔ Bug diagnosis & root cause fix (not just symptoms)
✔ New feature implementation to your spec (new API + UI)
✔ API issues — broken endpoints, auth errors, data bugs
✔ Frontend bugs — React state, routing, rendering issues
✔ Performance issues — slow queries, memory leaks, N+1s
✔ TypeScript errors & refactors
✔ Integration bugs — third-party APIs, webhooks, payments
How it works:
→ You describe the bug or feature
→ I give you a clear diagnosis + fix plan
→ I implement, test, and deliver with a Loom walkthrough
Built production systems handling 50K+ users. I know where bugs hide.
📌 Describe your issue - I'll tell you if I can fix it today.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$29
|
Standard
$149
|
Advanced
$399
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 5 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$49
Security Audit
(+ 1 Day)
+$99Frequently asked questions
About Siddharthkumar
AI-Native SaaS Engineer | NestJS | Next.js | Multi-Tenant Systems
Surat, India - 2:19 pm local time
50K+ users handled. 11M records migrated. 5 production systems shipped. AI-native. Architecture-first.
Most apps work at the start then fall apart when users, integrations and workflows grow. I get the architecture right from day one so you don't waste months rebuilding.
─── What I've shipped ───
Kavlo (live)
Enterprise contract intelligence SaaS. Multi-tenant with dual-layer isolation (Supabase RLS + app-level filtering — zero cross-tenant leakage). AI document pipeline: PDF → FastAPI/Celery → LLM parsing → PostgreSQL JSONB → validated UI. Vendor workflows triggerable from Slack, Claude or Teams via MCP server. Zero-downtime CI/CD on Azure Container Apps.
TypingBolt (live · 50K+ users)
Rebuilt an entire platform solo in 1 month. Migrated 50K+ users and 11M+ records from MySQL to MongoDB — zero downtime, zero data loss.
AI-personalized learning via LLM. Running stable in production for 12+ months.
Network File Search (github: sidvekariya510)
Distributed file search system across 25TB+ of data. Sub-second search. Built solo in 20 days using Go + Node.js + React.
─── How I work ───
I don't just write code — I design systems.
Architecture, scalability and code quality handled end to end. AI helps me move faster. Every decision and review is done by me.
→ You get the speed of a small team
→ With the accountability of one senior engineer
─── Stack ───
Backend: NestJS · Node.js · Python (FastAPI + Celery) · Express
Frontend: Next.js · React · TypeScript · TanStack · Vite
Data: PostgreSQL · Supabase · MongoDB · Redis · NeonDB
Cloud: Azure ACA · Docker · GitHub Actions · DigitalOcean
AI/LLM: Claude · MCP Protocol · OpenAI
Integrations: Stripe · Nylas · Merge.dev · WebSockets
─────────────────────────────────────────────
If you're building something that needs to scale — let's talk.
Portfolio: siddharthvekariya.netlify.app
Steps for completing your project
After purchasing the project, send requirements so Siddharthkumar can start the project.
Delivery time starts when Siddharthkumar receives requirements from you.
Siddharthkumar works on your project following the steps below.
Revisions may occur after the delivery date.
Issue Diagnosis & Local Setup
I clone your repo, set up the .env, and replicate the bug locally.
Root Cause Analysis & Implementation
I find exactly why it's breaking and write clean, tested code to fix it or build the new feature.