Hire the Best
Code Refactoring Specialists
Ivaylo G.
Sofia, Bulgaria
I can't say for sure but I have the impression that very few people (if any) in the IT field have read the "Message to Garcia" by Elbert Hubbard. I have read it and I dare to consider myself one of the people, who are able to "bring the message".
There always will be someone who is more creative, knows more or works faster than me. I am aware of that and I accept it. Still, I am quite confident of being a better prepared professional than the average IT guy.
I have 20 years of experience in programming, database modelling, system design and architecture, business processes analyses and automation, basic managerial accounting, Linux and network administration, Asterisk (FreePBX) configuration.
I have successfully solved various business-related software and hardware challenges. Being able to combine both low-level and high-level allows me to work on wide range of tasks. I have reverse engineered and fully decompiled about a dozen Delphi components and desktop applications.
Assembler was my 2nd language (after BASIC) and my first significant application was a player for tracker music entirely written in Assembler - with bass/treble digital filters.
I like digging deeper and understanding the root cause. I am quite good at debugging and troubleshooting - and this is not an empty claim.
Some of my achievements:
- developed 2 full-blown ERPs (for Walltopia and Composite-X)
- developed 2 accounting / warehousing applications with OLAP reporting and hierarchical multi-dimensional accounts
- developed Windows service daemon for logging Skype chats to a REST API in real-time
- ported one large desktop application (Interactive Delphi Reconstructor) from Borland CBuilder to Delphi
- implemented a company-wide real-time backup solution using Yadis or Bvckup, Samba and NappIT on OpenIndiana
- developed Linux daemon for controlling large LED strips based on WS2811 (and organized into X/Y matrix) through TCP/UDP socket
- developed combined CDR reporting, matching information from the local Asterisk PBX with billing information from the VoIP providers
- implemented Linux daemon for reading SMDR/CDR data from Panasonic PBX TDA-200 and storing in MySQL with reporting capabilities
- developed custom reporting module for a 3rd party security access control system and integrated it with the in-house ERP system
I choose my clients as carefully as you choose your freelancers. I value honesty, respect, good communication, good sense of humor, intelligence, modesty, kindness, generosity.
I prefer to develop from scratch custom business solutions automating the workflow of small businesses. My previous experience with the 2 ERP systems I already developed (and which are used 24/7 by customers and employees) is of enormous benefit. I feel truly happy when I am able to help a client by removing the burden and simplifying the workflow.
What can you expect from me:
- educating and explaining the things which are too technical and unfamiliar to you
- asking good questions
- providing meaningful advises and recommendations
- not trying to suck additional money by finding extra work of low business value
- understanding your real business needs and goals
- keeping you from making worthless or unwise expenses
- excellent responsiveness
- taking precautions against damaging your data
- really listening to you and your problems/pain points
- acknowledging my faults
- enjoying good jokes
- not quietly disappearing after faced with some tough challenge
- honestly admitting when I do not know something or not being qualified enough
- not over-complicating the solution
- being available for support and further assistance after the final deployment
- solving difficult problems
- positive skepticism
- breadth of knowledge
- ability to “finish”
- introspective, self-motivated to constantly improve
- perseverance, scrappy in the face of setbacks, doesn’t “get blocked”
- systems design ability
- empathy for users
- taking pains to write readable and maintainable code
- methodical and analytical: can diagnose the most mysterious bugs or find the source of performance bottlenecks
- Code Refactoring
- Software Debugging
- Quasar Framework
- PostgreSQL
- RESTful API
- Tailwind CSS
- JavaScript
- SQL
- Vue.js
- Business Analysis
- Vuex
- Database Design
- ERP Software
- Vuetify
- HTML
Rehan H.
Washington, United States
I understand my rate is higher than most, and that's because I bring extensive experience working with companies like Google, Meta, Reddit & hundreds of start ups. My goal is to make sure your investment in development leads to growth and success.
Shoot me a message, and we’ll schedule a call to discuss your project
Here's what I've worked with
Languages & Frameworks: Swift, Kotlin, React, React Native
AI & Machine Learning: Expertise in OpenAI API, LLM, and Diffusion Models
Mobile Development: Custom iOS and Android apps built with Swift, Kotlin, and React Native.
Web Development: Responsive and dynamic web applications using React and Node.JS.
Backend Solutions: Robust backend development with Node.JS
Cloud Integration: Seamless integration with AWS and Google Cloud services.
AI Integration: Leveraging AI and machine learning models to enhance your applications.
- iOS Development
- Mobile App Development
- Node.js
- Amazon Web Services
- Swift
- Firebase
- Android App Development
- React Native
- Android
- Java
- High Fidelity Design
- Figma
- Smart TV
- Apple TV Application
- Roku
Ajdin H.
Sarajevo, Bosnia and Herzegovina
🟢 WordPress & WooCommerce expert with 7+ years of experience in developing high-performance Websites/eCommerce solutions
🟢 Expertise in custom theme WordPress development with ACF custom blocks and building with popular page builders like Elementor, Divi and Beaver Builder
🟢 Webflow, Shopify, Squarespace experience - flexible in adapting to any platform needs
🟢 Converting Figma/Adobe XD designs into pixel-perfect HTML, CSS and responsive layouts
🟢 Offering website maintenance and updates
🟢 Experienced in code refactoring and website optimization for speed and efficiency
🟢 Providing site migrations, custom features and bug fixes
CMS & Technologies:
✅ WordPress | WooCommerce | Webflow | Shopify | Squarspace
✅ Elementor | Divi | Beaver Builder
✅ JavaScript | PHP | Node | HTML5 | CSS3
✅ Tailwind | Bootstrap | Foundation | Material UI | SCSS
✅ React | Next | Vue | Astro | Alpine | jQuery
- Code Refactoring
- WordPress
- WooCommerce
- Web Development
- Website
- Landing Page
- JavaScript
- PHP
- CSS
- HTML
- jQuery
- SCSS
- Front-End Development
- React
- Next.js
Viet N.
Ho Chi Minh, Vietnam
◈ Top Rated Plus freelancer with 100% Job Success on Upwork
◈ More than 17 years of experiences using Microsoft tech stack to develop Web, Mobile and Windows based applications, with strong analytical skills and a broad range of computer expertise.
◈ An excellent problem-solver, able to quick grasp complex systems and identify opportunities for improvements and resolution of critical issues.
◈ Dynamic and committed in continue gaining knowledge of the business domain and latest technologies
◈ Excellent team player, skilled in enlisting the support of all team members in aligning with project and organizational goals.
- Windows Communication Foundation
- C#
- ASP.NET MVC
- Windows Presentation Foundation
- AngularJS
- jQuery
- Microsoft SQL Server
- Entity Framework
- Microsoft Outlook Development
- .NET Core
- Microsoft Silverlight
- Unit Testing
- XAML
- Web API
Ahmed J.
Khanpur, Pakistan
Greetings!!
8+ years of Booking/Delivery Applications, Marketing Applications, Financial Applications, Aviation Industry, eCommerce, B2B, B2C, Saas and ERP Products Development Experience.
8+ years of professional experience as a Senior Full Stack Python/Django/Flask Developer & DevOps engineer (Angular/React/Vue/JS) in developing the web application. I have strong OOP skills, deep knowledge in Python and Django framework programming as well as huge experience in database integration and high load optimizations.
Here is the list of technologies I use:
Languages:
Python, JavaScript
Server Side:
Django Framework, Django Rest Framework, Express Framework, Flask, Laravel, Codeigniter
Client Side:
jQuery, Angular, ReactJS, VueJs, Bootstrap, Material, Vuetify, Vue Material, bootstrap-vue
Database:
MySQL, PostgreSQL, MongoDB
API Integration:
Social Login, Braintree, Strip, Mailchimp
Additionally:
- Experience scaling and administering full web application stacks
- Deploying code and AWS / Managing AWS resources
- Hands-on experience with Linux administration and bash scripting
- ElasticSearch
- Unit-testing/Experience with TDD & BDD
- Dev-ops – Puppet/Chef/Ansible/SaltStack
- Some experience in Matrix Oriented Programming languages (Matlab)
Preferred workflow stack: Trello/Jirra/Basecamp. VCS - Git - GitHub Flow.
I find myself a responsible, self-motivated, solution-driven developer and always meet clients expectations in terms of code quality and turnaround.
- Amazon Web Services
- Vue.js
- Django
- JavaScript
- Laravel
- React
- AngularJS
- Python
- Front-End Development
- RESTful API
- Relational Database
- Python Script
Tuan L.
Nieuwegein, Netherlands
I'm a Unity Developer with 12 years of experience.
Lots of experience in developing mobile games from the beginning until the end.
Super clean and readable code!
Strong points:
- Gameplay
- SQL (databases)
- Bug fixes
- Full stack
Hit me up, if you are interested or need more information about me!
- Unity
- Game
- Video Game
- Game Development
How it works
Post a job for free Post a job
Tell us what you need. Create your own job post or generate one with AI then filter talent matches.
Hire top talent fast
Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.
Collaborate easily
Use Upwork to chat or video call, share files, and track project progress right from the app.
Payment simplified
Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.
Don't just take our word for it
“Upwork provides an umbrella-level of security. I can see a talent’s work history and ratings. I can hold payments in escrow. I can communicate through Upwork Messages instead of working through my email address.”
Kim Darling
Emerald Tiger
“Upwork is the best platform to hire skilled professionals when we're not looking for a full-time employee. All the companies in our portfolio use Upwork to find talent across a wide range of fields.”
David Merry
Kinetic Investments
“Our very specific requirements can be a challenge— With Upwork, we’re able to access a bigger community to ensure the success of our projects.”
Katja Krohn
Summa Linguae