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4.9/5
Based on 3,017 client reviews

Rami S.

Expert Software Engineer | Full Stack Development | AI/ML Engineering

Kuala Lumpur, Malaysia
$10 per hour
54 jobs
$40K+ total earnings

Are you looking to build a high-performance SaaS platform, automate a complex supply chain, or integrate secure, production-ready AI into your business workflow? Many developers can write code, but very few understand how to seamlessly blend cutting-edge AI/ML systems with scalable, enterprise-grade architecture while ensuring strict data security (HIPAA, PCI-DSS). I am a Full-Stack Developer and AI/ML Engineer with extensive experience architecting end-to-end solutions for SaaS, Supply Chain, Healthcare (HIS/HMS), and custom ERP systems. Whether you need to build an MVP from scratch or scale an existing enterprise platform, I deliver clean, maintainable code and robust infrastructure. ๐Ÿš€ Core Expertise & How I Can Help You: AI/ML & GenAI Integration: Building intelligent RAG systems, custom chatbots, and LLM-powered workflows using OpenAI, Anthropic, LangChain, and Vector Databases (Pinecone, Qdrant). Robust Backend & Architecture: Designing secure, high-throughput microservices and APIs using Node.js (NestJS), Python (FastAPI/Django), and PHP, backed by PostgreSQL, MongoDB, or Redis. Modern, Responsive Frontends: Crafting seamless web and mobile interfaces using React, Next.js, Angular, Vue.js, and React Native. Cloud, DevOps & Compliance: Deploying production-ready applications on AWS/GCP/Docker with CI/CD pipelines, keeping security and regulatory standards (HIPAA, GDPR) at the forefront. ๐Ÿ› ๏ธ Technical Snapshot: Frontend: React, Next.js, Angular, Vue.js, React Native, Tailwind CSS Backend: Node.js (NestJS/Express), Python (FastAPI/Django), PHP, Java AI/ML: LLMs, LangChain, Vector DBs, Prompt Engineering, RAG Systems Cloud & Databases: AWS, GCP, Docker, Kubernetes, PostgreSQL, MySQL, MongoDB, Redis Letโ€™s build something scalable. Click the "Invite to Job" or "Hire" button on the top right, and letโ€™s discuss how we can bring your project to life.

Ross Z.

Software Developer | Python Developer | AI Automation Expert

Kyiv, Ukraine
$35 per hour
15 jobs
$70K+ total earnings

๐Ÿ”ฅ ๐ˆ'๐ฆ ๐š ๐๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ž๐ซ ๐ฒ๐จ๐ฎ ๐ง๐ž๐ž๐! ๐Ÿ”ฅ ๐Ÿ› ๏ธ Most developers need a babysitter, an endless Jira board, and three weeks just to wire up a basic script. I don't. I take your requirements, write clean Python, integrate LLMs and AI APIs, build reliable automations, and ship working solutions directly to production. ๐Ÿ’ฌ If you are building AI workflows or automation pipelines from scratch, I will build a resilient architecture that actually scales. If your previous freelancer left behind broken scripts, brittle integrations, or unreadable spaghetti code, that is usually where I come in and fix it. ๐Ÿ‘‰ Drop me a message with what you are building or what is currently broken, and let's get it sorted โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ• MY PRODUCTION EXPERIENCE & HIGHLIGHTS โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ•โ• ๐Ÿ”น WEB APPS & SAAS DEVELOPMENT โ€ข Deployed 12 production-ready AI automation workflows and client portals from concept to launch in under 6 weeks as a Fullstack Developer using Python โ€ข Optimized backend data pipelines for an AI automation platform handling 50K+ daily requests without downtime as a Python Developer โ€ข Rebuilt checkout flows and automated order processing on e-commerce platforms to boost completions by 22% as a Developer using Node.js and React โ€ข Rebuilt catalog and vendor management systems using Python and JavaScript to increase buyer conversion by 28% as a Fullstack Developer โ€ข Automated customer onboarding workflows for subscription platforms, cutting account setup time by 70% as a Software Developer โ€ข Restructured legacy backend services into modular APIs, cutting feature release time from 3 weeks to 3 days as a Fullstack Developer ๐Ÿ”น API & THIRD-PARTY INTEGRATIONS โ€ข Integrated Stripe and PayPal payment systems across multiple web apps to stop failed checkouts and recover lost revenue as a Full Stack Developer โ€ข Connected external business tools like HubSpot, Salesforce, and Twilio into central Python backends, saving 25+ manual work hours weekly as a Python Developer โ€ข Automated legacy data extraction using AI pipelines to feed modern web apps, saving clients $40K+ on complete rebuilds as a Software Developer โ€ข Synced inventory and CRM data across multiple stores using Node.js background workers to eliminate overselling as a JavaScript Developer โ€ข Tuned slow SQL queries and database indexes to eliminate server freezes under heavy load and cut cloud bills in half as a Python Developer โ€ข Automated routine sales and billing workflows by connecting CRMs with payment processors and custom AI scripts as a Software Developer ๐Ÿ”น DASHBOARDS, PORTALS & INTERNAL TOOLS โ€ข Built fast analytics dashboards to replace messy Google Sheets with live metrics, saving 15+ reporting hours weekly as an AI Automation Developer โ€ข Rebuilt logistics admin panels with modular UI components, doubling daily order-processing speed per manager as a JavaScript Developer โ€ข Automated approval chains and stock updates, letting operations teams handle double the order volume without extra staff as a Full Stack Developer โ€ข Built real-time order tracking and customer chat workflows using Node.js to cut support tickets by 40% as a JavaScript Developer โ€ข Built internal web portals to automate dispatch paperwork and invoice creation, saving operations teams 15+ hours weekly as a Software Developer โ€ข Set up customer self-service portals with AI Automation scripts, cutting repetitive support requests by 45% as a Fullstack Developer ๐Ÿ”น CODEBASE RESCUE & MODERNIZATION โ€ข Fixed critical billing and webhook errors on failing AI automation pipelines abandoned by prior devs, preventing contract losses as an AI Python Developer โ€ข Stabilized fragile production codebases and payment integrations to protect recurring revenue without downtime as an AI Automation Developer โ€ข Patched security vulnerabilities and bad API auth logic across neglected web apps to prevent data leaks as a Software Developer โ€ข Redesigned slow legacy checkout pages using modern JavaScript to eliminate drop-offs caused by UI lag as a Full Stack Developer ๐Ÿ”น AI WORKFLOWS & DATA AUTOMATION โ€ข Integrated OpenAI and Claude APIs into production backends to automate text processing and document analysis as an AI Python Developer โ€ข Set up automated alerts and reporting bots in Slack and Telegram to track system events in real time as a Full Stack Developer ๐Ÿ”น E-COMMERCE & AI AUTOMATION โ€ข Built AI customer support agents to handle order queries, tracking, and product FAQs automatically as an AI Automation Developer โ€ข Created automated workflows connecting Shopify, CRM, and email using webhooks and REST APIs as a Software Developer โ€ข Set up n8n and Python automation pipelines to eliminate repetitive store tasks and sync product data as an AI Automation Developer โ€ข Integrated OpenAI APIs with e-commerce backends to automate customer messaging and ticket triage as an AI Python Developer

Ruslana B.

Mobile App Tester | Web Testing | Software Testing | Manual QA Tester

Ahronomichne, Ukraine
$50 per hour
5 jobs
$700+ total earnings

15+ years of hands-on experience in Software Testing, Quality Assurance, Mobile App Testing, Web Testing, and Manual Testing. Iโ€™m a Mobile App Tester | Web Testing | Software Testing | Manual QA Tester helping companies release stable, user-friendly Web & Mobile products with fewer production risks. ๐Ÿ† 15+ YEARS IN QA | 3 PLATFORMS | 20 QA SKILLS | 7+ DOMAINS My experience covers iOS, Android & Web products across Hospitality, Entertainment, SportsTech, Booking, Loyalty, Gaming, and E-commerce. I have worked across 100% of the SDLC โ€” from requirements analysis and software development to release and production support. As a Mobile App Tester | Web Testing | Software Testing | Manual QA Tester, I combine Software QA, Quality Control, Manual Testing, and Software Quality Assurance to identify issues before release. ๐Ÿš€ WHAT I BRING โ€ข 15+ years in Software Testing & Quality Assurance โ€ข 3 platforms: iOS, Android & Web โ€ข 7+ product domains โ€ข 20 core QA skills & 10+ testing types โ€ข Detailed Bug Tracking & Reports with screenshots & videos ๐Ÿ“ฑ MOBILE APP TESTING I provide Mobile App Testing across iOS + Android, using Functional Testing, Regression Testing, Exploratory Testing, Usability Testing, Integration Testing, and User Acceptance Testing. As a Mobile App Tester | Web Testing | Software Testing | Manual QA Tester, I test registration, authentication, onboarding, booking, payments, notifications, subscriptions, loyalty programs, and critical user flows. My mobile testing process combines Manual Testing, mobile app design validation, UX QA, Test Results & Analysis, and edge-case testing to identify issues that can affect real users. ๐ŸŒ WEB APPLICATION TESTING My web application testing covers 4 areas: browsers, operating systems, devices, and screen resolutions. I perform Web Testing and Cross Browser & Device Compatibility testing to validate navigation, forms, authentication, booking, payments, responsive design, integrations, and critical customer journeys. As a Mobile App Tester | Web Testing | Software Testing | Manual QA Tester, I focus on both functionality and UX to make sure products behave consistently across different environments. ๐Ÿ” SOFTWARE QA & MANUAL TESTING With 15+ years in Software QA, I combine Quality Assurance, Manual Testing, Exploratory Testing, Quality Control, and UX QA with strong attention to detail. My experience covers the responsibilities of a software QA tester, QA tester, manual software tester, software tester, tester, quality assurance engineer, QA engineer, manual QA engineer, and Manual Quality Assurance specialist. As a Mobile App Tester | Web Testing | Software Testing | Manual QA Tester, I support active software development, pre-release testing, production verification, and ongoing Product Stability. I collaborate with software engineers, software developers, product and design teams using Jira, requirements, checklists, test documentation, and a user manual when available. ๐Ÿงช API, INTEGRATION & PRODUCT TESTING My API Testing covers requests, responses, status codes, validation, error handling, and data exchange, while Integration Testing validates communication between APIs, backend services, mobile/web applications, and third-party systems. I also have experience with Game Testing, combining real-user scenarios with Test Results & Analysis to provide clear, actionable findings. As a Mobile App Tester | Web Testing | Software Testing | Manual QA Tester, I select testing approaches based on product risks, release stage, business-critical functionality, and expected user behavior. Iโ€™m comfortable working in software development environments where tools such as Jest may be used by developers. โšก PRODUCT STABILITY & BUG REPORTING I focus on 5 key risks: crashes, broken critical flows, inconsistent states, data issues, and unexpected behavior. My Bug Tracking & Reports include reproduction steps, expected vs. actual results, environment details, severity, screenshots, videos, and actionable findings. Through Functional Testing, Regression Testing, Software QA Testing, and UX QA, I help teams improve technical quality and the overall user experience. For specialized products, I can also collaborate with subject-matter experts such as a QA Nurse while focusing on software quality and usability. As a Mobile App Tester | Web Testing | Software Testing | Manual QA Tester, I focus on 3 outcomes: Product Stability, User Experience & Release Confidence. ๐Ÿ’ฌ LET'S WORK TOGETHER With 15+ years in QA, 3 platforms, 7+ domains, 10+ testing types & 20 QA skills, I help teams find critical issues earlier and release more stable products. Iโ€™m available for mobile app testing, web application testing, software QA testing, Manual Quality Assurance, pre-release QA, and ongoing product testing. ๐Ÿ“ฉ Send me 3 things: what you're building, your product stage, and what you need tested.

Andrei R.

QA Testing , Software Testing, Testing, Software QA,

Sibiu, Romania
$10 per hour
3 jobs
$60 total earnings

I have over 6 years of experience as a Manual QA Tester, working on web and mobile applications for an international client in Germany. My daily work includes functional, regression, exploratory, and usability testing, creating detailed bug reports in Azure DevOps, and collaborating closely with developers to ensure high-quality releases. Beyond finding bugs, I always evaluate whether a feature makes sense from the user's perspective. I enjoy identifying confusing workflows, UX inconsistencies, and opportunities to improve the overall user experience.

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Resources to help you hire

Software developer hiring guide

Software developers build the applications, systems, and digital products that power businesses across every industry. Hiring the right software developer gives you access to specialized skills in web development, mobile apps, cloud infrastructure, and more โ€” helping you ship products faster and solve technical challenges with confidence. If you're launching a startup MVP or scaling an enterprise platform, the right developer can turn your requirements into working code.

What does a software developer do?

Software developers design, build, test, and maintain applications and systems that meet specific business or user needs. They work across a range of technologies and industries, from e-commerce platforms and healthcare tools to fintech products and internal business software.

Common responsibilities and specializations for software developers include:

  • Writing clean, maintainable code in languages such as Python, JavaScript, Java, C#, and Ruby
  • Building and maintaining back-end services, APIs, and databases that support application logic
  • Creating responsive, user-friendly front-end interfaces using frameworks like React, Angular, or Vue.js
  • Developing mobile applications for iOS and Android using Swift, Kotlin, or cross-platform tools like Flutter
  • Setting up cloud infrastructure and CI/CD pipelines on platforms such as AWS, Azure, or Google Cloud
  • Debugging, testing, and reviewing code to maintain quality and performance standards
  • Collaborating with product managers, designers, and QA engineers to deliver projects on schedule
  • Integrating third-party services, payment gateways, and data analytics tools into existing systems

How to hire a software developer on Upwork

Upwork gives you a direct path to experienced software developers who can start contributing to your project quickly. With built-in tools for posting jobs, evaluating candidates, and managing contracts, you can move from job post to working code in days.

Step 1: Post a job for a software developer

Start by creating a clear, detailed job post that describes your software development needs. A strong job post attracts qualified candidates and helps you filter out mismatches early.

  • Define the project scope, expected deliverables, timeline, and budget so candidates can assess fit
  • Specify whether you're building a new application, adding features, or maintaining an existing codebase
  • Note any APIs, third-party services, or databases the developer will integrate withSpecify the programming languages, frameworks, and tools your project requires (for example, Python, React, PostgreSQL, or AWS)
  • Indicate whether you'll provide technical documentation, wireframes, or design assets
  • Mention whether you need a front-end, back-end, or full-stack developer, and note any domain experience (fintech, healthcare, e-commerce) required
  • Review this software developer job description template to help structure your post

Use the Job Post Generator โ€” powered by Umaโ„ข, Upwork's Mindful AI โ€” to speed things up. Describe what you need in a few sentences, and Uma will draft a job post for software developers that you can review and customize.ย 

Step 2: Evaluate software developer candidates

Once proposals come in, review each candidate's profile to assess their technical strengths and project fit.

  • Look for experience with projects similar to yours in size, stack, and industry
  • Check GitHub repositories and portfolio projects for code quality, documentation, and relevant technologies
  • Review experience building applications with a similar architecture or scale
  • Look for examples of clean, maintainable code and well-documented projects
  • Confirm familiarity with your preferred cloud platform, CI/CD tools, or development environment
  • Read client reviews and Job Success Score to gauge reliability and communication skills

Uma can conduct instant video interviews and provide shortlists with side-by-side comparisons to help you evaluate candidates faster.

Step 3: Interview top software developer choices

Narrow your shortlist and set up interviews to dig deeper into each candidate's technical abilities and working style.

  • Ask about system design, debugging approaches, and how they handle code reviews
  • Discuss their experience with version control workflows, testing frameworks, and deployment processes
  • Ask how they estimate development effort and communicate project progress
  • Discuss how they identify, troubleshoot, and resolve production issues
  • Explore their approach to writing tests and maintaining code quality over time
  • Review these web developer interview questions for ideas to help prepare targeted questions for your project's tech stack

Schedule and conduct interviews within Upwork Messages, with an immediate transcript and summary after each call.

Step 4: Agree on scope and begin work with your software developer

Once you've selected a software developer, set clear expectations for the engagement in a contract before work begins.

  • Define milestones around sprint cycles, code deliverables, and deployment timelines so both sides know what success looks like
  • Define source code ownership, repository access, and branching strategy
  • Establish expectations for testing, documentation, and deployment before project completion
  • Clarify post-launch support, bug fixes, and maintenance responsibilities
  • Set up regular check-ins to review completed work, address blockers, and adjust priorities as the project evolves

Use Upwork's messaging and contract workroom to communicate, share files, and track progress in one place. Take advantage of identity verification, Hourly Payment Protection, hourly tracking, and project funds for a secure working relationship.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring a software developer cost?

Software developer rates on Upwork range from $10 to $100 per hour, depending on project scope and required expertise. Expert developers may earn $150 or more per hour.ย 

Review this breakdown of typical project-based costs to help you estimate your software development budget.

Bug fixes and minor updates

$200-$1,500/project

Entry to intermediate
  • Resolving UI glitches or broken features
  • Updating dependencies and patching security issues
  • Small performance improvements

Custom web application

$3,000-$15,000/project

Intermediate to expert
  • Full-stack web app with user authentication
  • Database design and API development
  • Admin dashboard with reporting features

Mobile app development

$5,000-$25,000/project

Intermediate to expert
  • Native or cross-platform mobile app
  • Push notifications and in-app payments
  • App store submission and launch support

Full-stack platform build

$10,000-$50,000/project

Expert
  • End-to-end SaaS platform with multitenant architecture
  • Cloud deployment and CI/CD pipeline setup
  • Third-party integrations and payment processing

Ongoing development and maintenance

$3,000-$12,000/project

Intermediate to expert
  • Sprint-based feature development
  • Code reviews and technical debt reduction
  • Monitoring, scaling, and incident response

Frequently asked questions

Is hiring a software developer worth it?

Hiring a software developer is worth it when you need custom-built technology, faster product releases, or specialized skills your in-house team doesn't cover. Software development outsourcing has become a mainstream strategy for businesses looking to access specialized expertise, accelerate development, and control costs.

What do I do after I hire a software developer?

After hiring a software developer, share project documentation, grant access to relevant repositories and tools, and establish a communication cadence. Setting clear milestones and deadlines from the start helps your developer deliver on scope without delays.

How long does a software development project take?

Timelines for software development projects vary based on complexity. A small bug fix may take a few days, a custom web application can take four to 12 weeks, and full-stack platform builds often require three to six months or more.