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You will get Bug Fixing of PHP, Laravel, React, Node.js, Next.js, Full Stack Developer

Roman D.Status: Offline
Roman D. Roman D.
5.0
Rising Talent
Preview image

Let a pro handle the details

Buy Web Programming Bug Fixes services from Roman, priced and ready to go.
Roman D.Status: Offline
Roman D. Roman D.
5.0
Rising Talent
Preview image

Let a pro handle the details

Buy Web Programming Bug Fixes services from Roman, priced and ready to go.

Project details

I will help you quickly identify and fix bugs in your PHP, Laravel, React, Node.js, Next.js, or Express.js web application. Whether you're facing backend errors, API failures, slow performance, database issues, UI glitches, routing problems, or unexpected crashes, I’ll diagnose the root cause and deliver a clean, stable fix.

I work with debugging tools, error logs, and modern best practices to ensure your application runs smoothly and securely. I can resolve problems in authentication, forms, dashboards, API responses, server-side logic, component rendering, SSR/ISR issues in Next.js, and real-time functionalities.

You’ll receive clear communication, fast turnaround, and clean code that prevents the issue from returning. If you need a reliable developer to restore your app’s stability and performance, I’m ready to help.

Tags

PHP, Laravel, React, Node.js, Next.js, Express.js, Bug Fixing, Debugging, Web Development, API Fix, Full Stack, Error Fix, Web App Support
Programming Languages
PHP, JavaScript, TypeScript
Coding Expertise
PSD to HTML, Localization, Design
What's included
Service Tiers Starter
$150
Standard
$300
Advanced
$500
Delivery Time 2 days 5 days 10 days
Number of Revisions
111
Bug Investigation
Fix Documentation
Detailed Code Comments
5.0
4 reviews
100% Complete
(4)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)

JA

Joann A.
5.00
Nov 21, 2025
Update of the SAAS plateforme Roman made a great job to make our SAAS alive, he worked a lot on different part of the code, front and back end. Now we continue to improve the workes he did.
I'll work again with Roman if I need to add new features.

WS

Weyland S.
5.00
Apr 23, 2025
Time off application Roman is awesome. Great communicator, willingness to go the extra mile to make sure that the work was completed to a high standard. Generally a pleasure to work with.

JA

Joann A.
5.00
Sep 30, 2024
Buid SAAS project React + Laravel developer Roman worked well and pretty fast on an urgent task. He even worked on weekend to be in time with my short dead line!
After that first jobs done, he continue to update the project to made a great SAAS for my client.
Now the SAAS is working well, made in few weeks and ready to have multi client on it.
I will work with Roman to update the SAAS project.

RK

Raif K.
5.00
Sep 21, 2023
Full Stack Web-Developer Roman is a very friendly and communicative developer. He works correctly and is not afraid to go the extra mile to meet a deadline. He worked on two projects for me and I can highly recommend working with him.
Roman D.Status: Offline

About Roman

Roman D.Status: Offline
AI SaaS Developer | Laravel + React | LLM Integrations & Automation
100% Job Success
5.0  (4 reviews)
Lviv, Ukraine - 1:19 am local time
I build production SaaS with AI inside — Laravel + React, LLM
workflows that survive real users, real edge cases and real
error rates.

Most AI projects fail after the demo. The prompt works, then
the queue backs up, the API times out, costs triple, and there's
no audit trail of what the model actually did. I build the
infrastructure layer that makes AI features shippable:
background jobs, retries, streaming, cost control, human
review, logging.

100% Job Success. 5.0 stars on every contract. 400+ hours.

WHAT I BUILD

— LLM features inside real products: Anthropic (Claude) and
OpenAI APIs — structured output, function calling, RAG,
streaming responses, prompt versioning, token/cost control
— Document AI: parsing, extraction, classification and
validation pipelines. Built these for KYC/AML compliance,
where a wrong answer is a legal problem, not a bad UX.
— Vision & multimodal: image recognition workflows (OCR,
photo-to-structured-data), document scanning
— AI agents & automation: Telegram/Slack bots, autonomous
task runners with tool access, scheduled agent workflows
— The product around the AI: multi-tenant SaaS, subscription
billing, admin dashboards, role-based access, usage metering

STACK

Laravel 12, PHP 8.3, React + TypeScript, Inertia.js,
PostgreSQL, pgvector, Redis, queue workers, Laravel Horizon,
Node.js, Docker. Anthropic API, OpenAI API, Claude Code.
Production experience in Vue.js, Rails, Next.js.

SELECTED WORK

— Compliance platform (KYC/AML): multi-tenant system with
three identity-verification providers, automated document
generation, encrypted payload handling and e-signature
workflows. AI-assisted document processing on top of a
fully auditable pipeline.
— Autonomous dev agent: a Telegram bot wired to the Anthropic
API with server access — I send a task in chat, the agent
plans it, executes it and reports back. Built it because I
wanted to ship from my phone. It works.
— Finance SaaS (my own product, live): automated tax
calculations and reporting for sole proprietors, with
AI-assisted document handling.
— SaaS platform rebuild (5.0 rating): "Roman made a great job
to make our SaaS alive, he worked a lot on different part of
the code, front and back end."

I use AI-assisted development daily — which means I ship
faster than my hourly rate suggests, and I know exactly where
these tools break. That second part is what you're actually
hiring.

HOW I WORK

Written plan before code. Daily written progress. Clean,
tested, documented commits. Europe hours with US overlap.

I communicate in writing — Slack, Upwork, Loom, detailed PRs —
and I'm direct about scope and feasibility. If your AI idea
won't work reliably, I'll tell you before you fund it, not
after.

Send me what you're trying to automate and I'll tell you
whether an LLM is the right tool for it — plenty of times
it isn't.

Steps for completing your project

After purchasing the project, send requirements so Roman can start the project.

Delivery time starts when Roman receives requirements from you.

Roman works on your project following the steps below.

Revisions may occur after the delivery date.

Initial discussion

Fix bugs and issues in PHP, Laravel, React, Node.js, Next.js

Review the work, release payment, and leave feedback to Roman.