You will get a production-ready Go, PHP or Python backend and REST API
Project details
Senior backend developer with 15+ years of experience, including 11 years building and running a multi-cloud billing platform that was acquired by Google. That platform invoices millions of dollars every month for tens of thousands of customers, so I am used to writing code that has to be correct.
What I build for you:
• REST APIs and backend services in Go, PHP (Laravel, Symfony, Yii) or Python
• Fixes for existing code, from quick errors to race conditions and data problems in production
• MySQL schema design, indexing, query optimization and safe migrations
• Third-party API, payment and billing integrations
• Tests and documentation so the next developer can pick it up
Why work with me: a production mindset rather than quick hacks, honest estimates before any work starts, and clear communication throughout. You always receive the full source code.
Not sure which tier fits? Message me with a short description of your project and I will scope it for free and tell you honestly whether I am the right person for it.
What I build for you:
• REST APIs and backend services in Go, PHP (Laravel, Symfony, Yii) or Python
• Fixes for existing code, from quick errors to race conditions and data problems in production
• MySQL schema design, indexing, query optimization and safe migrations
• Third-party API, payment and billing integrations
• Tests and documentation so the next developer can pick it up
Why work with me: a production mindset rather than quick hacks, honest estimates before any work starts, and clear communication throughout. You always receive the full source code.
Not sure which tier fits? Message me with a short description of your project and I will scope it for free and tell you honestly whether I am the right person for it.
Programming Languages
PHP, Python, GoCoding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$75
|
Standard
$250
|
Advanced
$600
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Frequently asked questions
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AH
Adrian H.
Aug 23, 2026
Laravel + React Developer — Bug Fixes & Small Features on Production Booking Platform
Andy was easy to work with. He understood fast what I needed to be implemented.
I provided all the resources that he needed and the implementation was exactly what I have required and on time.
Easy to talk to, he was available for explanation and clarification, I will surely work with him again in the future.
I provided all the resources that he needed and the implementation was exactly what I have required and on time.
Easy to talk to, he was available for explanation and clarification, I will surely work with him again in the future.
About Andrei
Senior Backend Engineer | Go, Python, PHP | APIs & AI Integration
Iasi, Romania - 3:50 am local time
I've been developing production software for 15+ years, including 11 years working on a multi-cloud marketplace and billing platform acquired by Google. The platform processes millions of dollars in monthly billing for tens of thousands of businesses and close to 100,000 users, backed by a 7 TB MySQL database and BigQuery reporting pipelines.
I own backend services there end to end: Go microservices using gRPC and REST, usage rating and invoicing pipelines for AWS, Azure and Google Cloud, database schema design, query optimization on high-volume billing tables, and the Angular/TypeScript applications on top.
What I can help you with:
Backend services, REST APIs and microservices in Go, Python/FastAPI or PHP
Debugging existing systems — from straightforward bugs to race conditions, performance issues and production data problems
MySQL schema design, indexing, query optimization and safe migrations
Third-party APIs, payments, billing and external service integrations
AI/LLM integrations, agents, tool calling, MCP and RAG systems
BigQuery pipelines, reporting and large-scale data processing
Full-stack work when needed using Angular and TypeScript
Dockerized applications and production deployments
I'm also a co-founder of FranceRent, a live tours and experiences marketplace in France handling around 100 bookings per month. I built its entire backend and full administration platform, including the admin frontend, and continue to maintain and operate it. This gives me experience not only building software, but also running a real online business where reliability, payments and operational workflows matter.
How I work: I clarify the problem before writing code, give realistic estimates, and deliver maintainable, tested work with clear documentation. I am comfortable taking ownership of an existing codebase as well as building new systems from scratch.
Send me a short description of what you're trying to build or fix. I'll tell you whether it's a good match for my experience and how I would approach it.
Steps for completing your project
After purchasing the project, send requirements so Andrei can start the project.
Delivery time starts when Andrei receives requirements from you.
Andrei works on your project following the steps below.
Revisions may occur after the delivery date.
Scope and confirm
We agree exactly what will be delivered. I ask any questions up front and confirm the approach and timeline before writing code.
Build and test
I implement the work in clean, reviewable commits and add tests for the critical logic. You get progress updates, not silence.