You will get scalable microservice backend in Golang and Python.
Rising Talent
Project details
Ready to scale your infrastructure? I engineer scalable backend microservices using GoLang and Python, delivering high-performance architectures designed for heavy loads and real-time data processing.
I bridge the gap between business logic and technical execution, providing end-to-end development from system design to cloud deployment.
My expertise:
High-Performance APIs: Robust REST and gRPC services using Go (Fiber, Gin) and Python (Flask, FastAPI).
Event-Driven Architecture: Decoupled microservices using Kafka, RabbitMQ, and Redis for async processing.
Database Optimization: Schema design, indexing, and management for PostgreSQL, MongoDB, TimescaleDB, and ElasticSearch.
AI & Data Pipelines: Integration of ML/NLP models, OCR systems, and real-time analytics.
Seamless connections with Stripe, Twilio, and 3rd-Party Integrations.
Dockerized environments, GitHub Actions CI/CD, and cloud setup on AWS/GCP.
I have worked for Fintech, eCommerce, IoT, and AI platforms.
Whether you need to migrate a legacy monolith or build a distributed system from scratch, I provide the technical expertise to ensure your backend is fast, resilient, and ready for growth.
I bridge the gap between business logic and technical execution, providing end-to-end development from system design to cloud deployment.
My expertise:
High-Performance APIs: Robust REST and gRPC services using Go (Fiber, Gin) and Python (Flask, FastAPI).
Event-Driven Architecture: Decoupled microservices using Kafka, RabbitMQ, and Redis for async processing.
Database Optimization: Schema design, indexing, and management for PostgreSQL, MongoDB, TimescaleDB, and ElasticSearch.
AI & Data Pipelines: Integration of ML/NLP models, OCR systems, and real-time analytics.
Seamless connections with Stripe, Twilio, and 3rd-Party Integrations.
Dockerized environments, GitHub Actions CI/CD, and cloud setup on AWS/GCP.
I have worked for Fintech, eCommerce, IoT, and AI platforms.
Whether you need to migrate a legacy monolith or build a distributed system from scratch, I provide the technical expertise to ensure your backend is fast, resilient, and ready for growth.
Programming Languages
Python, GoCoding Expertise
Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$150
|
Standard
$500
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 5 days | 15 days | 30 days |
Number of Revisions | 2 | 5 | 5 |
Design Customization | - | - | - |
Content Upload | |||
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$100 - $1,000
Additional Revision
+$100
3rd party integrations
(+ 2 Days)
+$100Frequently asked questions
3 reviews
(3)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
AR
Ahmad R.
Mar 31, 2026
RAG Developer for AI-Powered PDF Intelligence System
Very dependable freelancer with strong problem-solving skills.
MZ
Muhammad Z.
Jan 25, 2026
POC Developer for AI Voice Agent
Ahsan demonstrated a high level of technical expertise on the project. He quickly understood a complex codebase with significant issues, accurately identified the problems, and delivered effective solutions. His communication was clear and consistent, and he completed the work ahead of schedule. Very satisfied with both the quality of his work and his professionalism.
AJ
Alexia J.
Nov 9, 2025
Backend Developer (Golang | Python | Microservices)
Ahsan Saif is an outstanding backend developer with deep expertise in Golang. He writes clean, efficient, and scalable code, delivering high-quality results within tight deadlines. His problem-solving skills and understanding of backend architecture are impressive. Communication was smooth throughout the project, and he always delivered more than expected. I highly recommend him and will definitely work with him again.
About Ahsan
Backend Developer | Golang & Python | Scalable Microservices
100%
Job Success
Islamabad, Pakistan - 12:48 am local time
Struggling with backend bottlenecks or scaling limits? I build high-performance Golang & Python systems that handle high concurrency, ensuring 99.9% uptime and preventing crashes, even with a million active users online.
I specialize in Golang & Python development, crafting robust APIs, event-driven architectures, and data-intensive systems that power real-world products, from eCommerce platforms to fintech applications, AI/ML-powered solutions, and real-time data pipelines.
DRIVING REVENUE GROWTH AT SCALE.
1. National highway system (OneNetwork):
- 100M+ vehicles and PKR 40 billion+ (~$140M USD) in annual transaction volume across multiple tollbooths
- Local bank integrations for online payment processing and a centralized ledger for reconciling cash payments and online transactions.
2. Dotshop.ai (eCommerce platform)
- 100,000+ concurrent users, 15k+ reqs/second
- Up to $50,000/month in processed sales, with automated curator/platform revenue splits.
If you’re looking for a backend engineer who can own your project end-to-end, from architecture design to production deployment, I can be your one-stop solution.
WHAT I DELIVER
→ APIs & backend systems handling 1M+ concurrent users with zero latency spikes or downtime (Go, Python, gRPC, WebSockets)
→ Event-driven microservices processing millions of real-time events daily with zero data loss.
→ Database architecture tuned for sub-millisecond query response at billion-row scale (PostgreSQL, MongoDB, TimescaleDB)
→ Payment & revenue infrastructure handling automated splits, payouts, reconciliation using Stripe, Adyen, Braintree.
→ AI-powered agents & automation for support, document processing, and predictive analytics, built to plug directly into your existing backend
→ Production focus from Day 1: Containerized, CI/CD-driven, cloud-native development (Docker, GitHub Actions, AWS/GCP). It works in the real world, not just on my laptop.
TECH STACK
🔹 Languages: Golang, Python
🔹 Frameworks: Fiber, Gin, Echo, Flask, FastAPI, Django
🔹 Databases: PostgreSQL, MongoDB, TimescaleDB, CockroachDB, Redis, ElasticSearch, Qdrant, Weaviate.
🔹 Technologies: gRPC, GraphQL, Debezium, JWT/Paseto, WebRTC, Celery, Asynq.
🔹 Messaging/Events: Kafka, RabbitMQ, WebSockets, Webhooks.
🔹 DevOps: Docker, GitHub Actions, Automated Testing.
🔹 Deployments: Clouds(AWS, GCP).
🔹 Integrations: Stripe, Adyen, Braintree, Klaviyo, SearchSpring, Twilio, Google Merchant Center.
PAST EXPERIENCE:
E-Commerce & Marketplaces: High-concurrency platforms with secure payments, recommendation systems, and advanced product search using ML.
Smart Infrastructure & IoT: Vehicle tracking, RFID ingestion, real-time data sync.
Fintech & Trading Apps: Live streaming data, ML-driven signals, secure user management.
Food & Delivery Platforms: Order lifecycle, payment gateway integrations with Stripe, and delivery logistics handling.
AI & NLP: Sentence correction, OCR pipelines, and AI-powered automation.
I don’t just write code, I build backend engines that accelerate business growth. Whether you need a new system from scratch or to scale your existing product, I’ll help you architect, develop, and deploy with confidence.
Message me with your project plan, current bottlenecks, or architecture challenges, and I’ll provide a free scaling strategy within 12 hours.
Steps for completing your project
After purchasing the project, send requirements so Ahsan can start the project.
Delivery time starts when Ahsan receives requirements from you.
Ahsan works on your project following the steps below.
Revisions may occur after the delivery date.
Qucik call to establish requirements
Discuss the project's scope, finalize the timeline, and establish expectations for the final deliverable.
Project scope finalization
Finalize the requirements with deadlines and project deliverables.