You will get a high-performance Golang API or microservice for your app
Project details
There's a specific moment every growing product hits: Node.js handles the MVP fine, then traffic or data volume increases and response times start creeping up. If you're at that point, or architecting ahead of it, this is a Go backend built for that exact load profile.
I write Golang services with PostgreSQL and Redis, designed around the access patterns your product actually has rather than a generic CRUD template. That means proper connection pooling, indexed queries from day one, and a service boundary that doesn't require rewriting everything when you scale further.
This works as a standalone microservice that sits alongside your existing Node.js stack (handling the one endpoint or pipeline that's under real load), or as a full backend rebuild if you're migrating entirely. I'll tell you honestly which one your situation actually needs, including if the answer is neither and the real fix is a query optimization on your current stack.
Send me your current response time numbers and request volume and I'll give you a realistic assessment before any code gets written.
I write Golang services with PostgreSQL and Redis, designed around the access patterns your product actually has rather than a generic CRUD template. That means proper connection pooling, indexed queries from day one, and a service boundary that doesn't require rewriting everything when you scale further.
This works as a standalone microservice that sits alongside your existing Node.js stack (handling the one endpoint or pipeline that's under real load), or as a full backend rebuild if you're migrating entirely. I'll tell you honestly which one your situation actually needs, including if the answer is neither and the real fix is a query optimization on your current stack.
Send me your current response time numbers and request volume and I'll give you a realistic assessment before any code gets written.
Programming Languages
JavaScript, TypeScript, GoCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$200
|
Standard
$600
|
Advanced
$1,300
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 2 | 3 | Unlimited |
Number of Pages | 1 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$80 - $250
Additional Revision
+$50
Additional Page
(+ 1 Day)
+$70Frequently asked questions
5 reviews
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TM
Tom M.
Mar 21, 2023
ONE YEAR PROJECT - NODE.JS expert with tracing code to optimize API Response time MongoDB
Great developer, highly detailed. Will work again!
MK
MIchael K.
Feb 16, 2023
Node/React Developer
WC
Walter C.
Jun 8, 2022
React Developer
Thanks
EH
Edward H.
Dec 13, 2021
Full stack Developer Required immediately - GraphQL/Apollo, Next.Js/React (Typescript)
The position was not a good fit to him but he was a good dev. Will hire again.
RL
Robert L.
Mar 8, 2019
Full Stack Web Development, Need Pakistani Programmers
About Zaffar
Full-stack & AI Integration Dev |Next.js, Supabase, Golang, Claude API
Gilgit, Pakistan - 5:38 am local time
My core stack is Next.js, TypeScript, Supabase, and PostgreSQL on the product side. On the AI side I work with the Claude API and OpenAI to build things that hold up in real usage: RAG pipelines that retrieve from your actual data, AI agents that trigger real actions through tool calling, document processing systems, and conversational features embedded inside working SaaS products. For backend services that need real throughput I write in Golang. When teams have outgrown Node.js or need microservices that do not fall over under load, that is the part of the work I actually enjoy.
The most recent role on my profile is Senior AI Integration Expert at Proposala, where I built the AI layer for a B2B proposal automation platform. The core problem: sales teams were spending 45 to 60 minutes per proposal pulling product details, pricing, and compliance language by hand. I integrated Claude API to generate structured first-draft proposals from a short input, with output that mapped directly into their existing template format. Proposal generation time dropped to under eight minutes. That is the kind of problem I am good at: not adding AI for the sake of it, but finding the one place in a workflow where it cuts real time.
Before Proposala I spent five years as a Senior Full-Stack Engineer on Upwork, building products for clients across industries in React, Vue, Node.js, and PostgreSQL. Before that three years at uConnect building enterprise SaaS interfaces: a cloud cost management portal, a banking and HR platform, and a point-of-sale system. The full-stack side is not something I picked up to support AI work. It is the majority of my career.
What working with me looks like in practice: you give me a brief or a Figma file, I ask the questions that actually matter for scope, I give you a timeline that does not shift, and I ship. I document the code properly. If something breaks after handover I am reachable.
I work best on projects where one person needs to cover the whole product. Send me a message with what you are building and I will tell you within a few hours whether I can help and what the scope looks like.
Steps for completing your project
After purchasing the project, send requirements so Zaffar can start the project.
Delivery time starts when Zaffar receives requirements from you.
Zaffar works on your project following the steps below.
Revisions may occur after the delivery date.
Plan the Architecture
I'll review your requirements, design the API or microservice architecture, define endpoints, data flow, and recommend the best implementation approach before development begins.
Build & Integrate
I'll develop the Golang API or microservice, implement business logic, integrate databases or third-party services, and ensure clean, secure, and scalable code.