Hire Vetted Web Application Engineers at Upstaff - Page 7
All vetted software engineers you need to build AI, Web3, and data Products.
- Dedicated Full-time commitment for long-term or Time& Material for shorter or ongoing support
- Europe, Israel, LatAm, United States, Asia geography coverage
- Remote and hybrid engagement
- Trial period, no termination fees or hidden costs for transparent and risk-free onboarding.
Web Application
All
Web Application
Data and Analytics
Cloud and Operations
Mobile Application
Digital Platforms
Blockchain
Design and Creative
Quality Assurance
Project Management
Desktop Application
Writing and Translation
Scripting and Automation
Marketing and SEO
Embedded Systems
Low-Code and No-Code
GameDev
Industrial Engineering
PHP 5yr.
Laravel 3yr.
CodeIgniter 2yr.
Azure DevOps 2yr.
AWS CloudTrail 1yr.
Senior Software Engineer with 6+ years of expertise in backend architecture, PHP frameworks (Laravel, CodeIgniter), and cloud deployments. Proven ability to optimize system performance by up to 40%, lead API integrations including NASA Earthdata and Stripe, and implement CI/CD pipelines reducing deployment time by 40%. Skilled in full-stack development, DevOps automation, and scalable infrastructure design. Holds a Bachelor's degree in Software Engineering and currently pursuing AI certification.
Senior
Pakistan
PHP
WordPress
- 5 years of commercial experience in Web Development
- Зку-Intermediate English
Senior
Ukraine
$35/hr
$5880/month
$5880/month
React Native
- 4+ years of experience in web development using React Native and React
- Upper-Intermediate English
- Available ASAP
Middle
Ukraine
React 1yr.
Node.js 1yr.
MongoDB 1yr.
AWS 1yr.
AWS Lambda 1yr.
- Full Stack Developer with 1+ years of experience in designing scalable, production-grade web applications using the MERN stack and AWS cloud services.
- Proficiency in React.js, Node.js, MongoDB, AWS Lambda, Cognito, API Gateway, and S3. Expert in serverless architecture, RESTful APIs, database design, authentication systems, and performance optimization.
- Developed several full-stack applications, including a CV generation platform with optimized PDF exports and serverless APIs handling over 10,000+ requests daily.
- Holds a Bachelor's degree in Computer Engineering, complementing his practical coding skills with a strong foundation in computer science principles.
- Agile and DevOps advocate with experience in using tools like Git, GitHub, and AWS Suite for iteration, version control, and infrastructure as code.
- Dedicated to best practices in software development, including secure coding, performance measurements, structured logging, and clean architecture implementation.
Junior
Cairo, Egypt
AWS 5yr.
TypeScript 5yr.
Node.js 5yr.
AWS Lambda 5yr.
Accomplished Cloud Developer & DevOps Engineer with over 5 years of experience specializing in AWS services and serverless technology. Proficient in automating and optimizing back-end systems using TypeScript, Node.js, and cloud-native platforms, with a record of reducing execution time and costs in AWS environments. Extensive knowledge of infrastructure-as-code and CI/CD tools, including Terraform and GitHub Actions. Bachelor in Computer Science with a strong background in designing fault-tolerant architectures, asynchronous messaging patterns, and implementing DevOps practices to enhance software delivery. Holds multiple certifications including AWS Certified Solutions Architect - Associate and AWS Certified Security - Specialty.
Senior
Karachi, Pakistan
Ruby 5yr.
Ruby on Rails 4yr.
- 6 years of commercial experience with Ruby on Rails ecosystem
- Team Lead / Full stack (Ruby, React) software engineer
- Cloud Services (AWS, Azure, Heroku)
- Upper-intermediate English
- Available ASAP
Senior
Minsk, Belarus
Ruby on Rails 6yr.
- With about 6 years of software development experience with Ruby on Rails and the latest standards of ECMAScript
- Intermediate English.
- Available ASAP.
Senior
Khmelnytskyi, Ukraine
React 9yr.
Blockchain 2yr.
Spring Boot
Gemini 3
OpenAI
I am a senior software architect and blockchain automation engineer , with over 20 years of professional development experience and 4+ years dedicated to crypto, trading bots, WebSocket systems, and SaaS automation platforms.
My career spans enterprise systems, mobile applications, cloud analytics, authentication infrastructure, and large-scale data platforms — evolving into high-performance blockchain automation and bot engineering across Solana and Ethereum ecosystems.
I specialize in building:
- Real-time token tracking systems
- Telegram trading bots
- Solana Token Bundling, Deployment and tracking platforms,
- Rug detection & dev-sell intelligence
- MongoDB-driven analytics platforms
- Event-driven SaaS backends
All systems are designed for 24/7 uptime, restart persistence, and real trader usage — not prototypes.
Core Expertise
Blockchain & Crypto
- Solana Web3.js
- Ethereum (EVM)
- Pump.fun SDK
- Token metadata indexing
- Market cap & liquidity tracking
- Dev-sell detection
- Rugpull analysis
- ATH / ROI analytics
- Wallet behavior monitoring
Bot & Automation Systems
- Trading bots
- Token sniper trackers
- Telegram bots
- Volume simulation bots
- Alert engines
- Subscription lifecycle managers
Real-time ranking systems
Expert
Angular 8yr.
Node.js 5yr.
React 3yr.
Ionic 2yr.
MongoDB
Software Engineer with 9+ years of expertise in full stack development, specializing in Angular, React.js, Node.js, Ionic, and MongoDB. Proven track record in architecting scalable microservices, designing REST APIs, and delivering reusable components across enterprise projects. Experienced in AWS cloud services, Docker, and DevOps practices, with strong skills in UI/UX design and product thinking. Holds a Bachelor of Engineering in Computer Science and recognized for driving modular architecture and leveraging Generative AI to accelerate development and enhance team productivity.
Senior
India
MS SQL Server Management Studio
Unreal Engine
Linea
Azure VM
Seasoned Head of Engineering with 8+ years of experience in driving technical strategy and leading multidisciplinary development teams. Expertise in AI, blockchain, and full-stack custom software solutions including MERN stack, PHP, and MySQL. Proven track record at Macromodule Technologies, shaping engineering culture with agile principles and maintaining focus on delivering business-aligned, future-ready software products. Holds a Bachelor of Science in Computer Science and has previously elevated backend systems at Dtech Systems and spearheaded full-stack projects at ArhamSoft. Known for integrating emerging technologies and establishing engineering KPIs that foster continuous improvement and technical excellence.
Expert
JavaScript 2yr.
React 2yr.
Node.js 2yr.
-2 years of experience in web development. Skilled in JavaScript (React and Node). Confident in HTML, CSS, integration with API
- Upper-Intermediate English
- Available ASAP
Junior
Lviv, Ukraine
JavaScript 6yr.
TypeScript 5yr.
Angular
Node.js
Azure
- 8+ years of experience as a front-end Angular / Ionic developer and 5 years as a Full-stack developer using Node.js and PHP
-Vast experience with modern JavaScript frameworks like Angular, Node.js, and Ionic, complemented by back-end expertise in Node.js, deployed on cloud services such as Azure,GCP Firebase, and MongoDB/Atlas/Cosmos
- Proven experience architecting solutions from the ground up, including leading development teams, code reviews, essential infrastructure setup and controlling key processes
- Focused on efficiency directing collective effort to deliver features quickly while ensuring high code quality.
- Skilled in multi-tenant architecture, API integration, database management, and system scalability.
Senior
Budapest, Hungary
Java
Python
JavaScript
TypeScript
SQL
Software engineer with a robust background in full-stack development and proven expertise in Java and Python. Demonstrated success in architecting and implementing high-transaction APIs with low latency in Java/Spring Boot, and optimizing ETL pipelines using Python/Airflow. Experience includes substantial cost reductions and performance enhancements in cloud environments, AI-driven application development, and leading large-scale software migrations and modernization projects. Holds a master's degree in Computer Science and possesses advanced certifications from prominent institutions, encompassing Java, AWS, and Docker, accompanied by a strong foundation in Agile methodologies.
Expert
$40/hr
$5000/month
$5000/month
iOS 11yr.
Swift 5yr.
Objective-C 5yr.
Java 3yr.
Spring Boot 3yr.
Expert with iOS swift/ Objective C development
Nearly 2 years experience on Java Spring Boot development
Senior
Karachi, Pakistan
JavaScript
Bootstrap 4
Python
Software engineer with over 3 years of professional experience at COMSATS University Islamabad, specializing in Python, Django, and JavaScript. Notable for developing a complete Queue Management System to enhance university operations. Expert in Bootstrap, assisting with UI/UX design, backend logic, and data management. Proficient in conducting quality assurance and regression testing on complex web applications such as the Student Fee Management System. Holds a diploma in Graphic Design, contributing to a strong foundation in UI/UX principles. Capable of translating departmental requirements into effective technical solutions and maintaining system reliability for various university system modules.
Junior
Islamabad, Pakistan
PHP
Symfony
- Experienced in PHP, collaborated with various web development teams to create eCommerce sites
Senior
Zaporizhia, Ukraine
Laravel
Symfony
- Software Engineer with excellent skills, knowledge, and work experience in web, mobile, and desktop development
- Has over 6 years of experience in developing sites and applications using modern web technologies, solutions, and best practices
- Major specialization is building applications based on both Javascript/ES6+ and PHP: backend frameworks Laravel, Symfony, NodeJS, Express/Nuxt/Next/Nest.js/RestAPI along with front-end JS frameworks such as ReactJS + Redux, React Native, VueJS, Angular 2+.
- Rich experience in deploying and maintaining using such technologies as CI/CD, Docker, Apache/Nginx, CDN + force SSL Cloudflare, AWS(EC2, S3, Route53, RDS, Lambda, Elastic-cache, SES, SNS, SQS, Amplify CI/CD, IAM), GCP (Firestore, IAM, Cloud Run, Cloud Functions, App Engine, Real-time Database, Identity and so)
- Strong skills and knowledge in DB design and management using such DBMS as MySQL, PostgreSQL, DynamoDB, SQLite, MongoDB, writing complex SQL-queries with sub-queries, transactions, cursors, creating stored procedures, triggers, sequences, pg pub/sub, etc.
- Worked on over 40+ projects in various roles, like Team/Teach Lead, Architect, FE/BE Developer, with different aims and misc. tech stack
- Intermediate+ English
- Available from 01.07.2022
Architect/Team-lead
Zaporizhia, Ukraine
PHP
Symfony
Laravel
- PHP developer with 6+ years of extensive experience in web development using Symfony and Laravel frameworks
- Successfully contributed to the development of various e-commerce, social networking, and web applications.
- Strong familiarity with cloud services, including AWS Lambda, Amazon S3, and Amazon CloudFront.
- Knowledgeable in database management systems like MySQL and PostgreSQL.
- Proficient in programming languages such as PHP, JS, and Python.
- Skilled in software architecture design, UML, and design patterns.
- Experienced in working with Agile and SCRUM methodologies.
- Advanced English.
Senior
Zaporizhia, Ukraine
Laravel
Symfony
Yii
- 5 years of experience in the IT industry using back-end technologies (Symfony, Laravel Yii)
- Developed projects from scratch and improved the performance of existing projects
- Worked on RESTful and SOAP API for web, CRM, mobile, and e-commerce applications
- Upper-intermediate English
- Available in 2 weeks after approval for the project
Senior
Zaporizhzhya, Ukraine
AWS
C#
Microsoft SQL Server
- Highly experienced Software Engineer with over 13 years of industry experience
- Strong expertise in Microsoft technologies, including .NET, C#, Azure, and SQL Server
- Proficient in working with a wide range of technologies, including AWS, PostgreSQL, DynamoDB, Git, Docker, and React
- Skilled in system architecture, frontend development (HTML, JavaScript, CSS), and agile methodologies (Scrum, Kanban)
- Knowledgeable in Node.js, Python, and Machine Learning
- Trilingual in Portuguese, English, and Spanish
- Microsoft certified professional with a degree in Systems Analysis and Development from FATEC-SP
Senior
Brazil
Node.js 5yr.
Vue.js 4yr.
React 4yr.
- 5+ years of experience in the IT industry using front-end and back-end technologies (Vue.js, React, Node.js)
- Upper-intermediate English
- Available ASAP
Middle
Ukraine
PHP 1yr.
Laravel 1yr.
Vue.js 1yr.
JavaScript
TypeScript
- Full-stack Laravel developer with in-depth expertise in PHP, JavaScript, TypeScript, Laravel, Vue.js, and Nuxt.js.
- Proven track record of building complex systems including a product comparison tool with web scraping and a hospital management system, demonstrating strong problem-solving skills.
- Proficient in API integration, Laravel queue, jobs, scheduler, creating reusable components, and knowledge of AWS, Git, and Firebase notifications.
- Holds a Bachelor of Commerce and a Post Graduate Diploma in Computer Application, blending commerce acumen with technical prowess.
- Experienced in working with OCR for financial processing and utilizing IP rotation for data scraping, indicating a strong grasp of modern development practices.
- Speaks English, Gujarati, and Hindi fluently, bringing excellent communication skills to a multilingual team environment.
Junior
Surat, India
$55/hr
$9000/month
$9000/month
React
Angular
- 9+ years of professional expertise in the IT industry;
- Rich experience in Frontend Development using (HTML5, CSS3, ES6,React, Angular, Angular JS, Node JS, React(fluent), Backbone(fluent), JQuery), strong technical background;
- Experience with third-party services integration;
- Experience in databases: MongoDB;
- Experienced in software architecture performing;
- Team Leading (Tech team);
- Experienced in code reviewing and code refactoring
- Available in 2 weeks after approval for the project
Architect/Team-lead
Denmark
$30/hr
$5280/month
$5280/month
JavaScript 6yr.
TypeScript 5yr.
Angular 5yr.
Node.js 5yr.
4+ years of web development experience with Angular, NodeJS, JavaScript, Full stack web developer in full application development life cycle including requirement analysis, designing, coding, deploying and debugging.
Middle
Minsk, Belarus
JavaScript 5yr.
TypeScript 5yr.
Angular 5yr.
Node.js 3yr.
NestJS 3yr.
A seasoned software engineer with over 5 years specializing in JavaScript/TypeScript and Angular development, this professional demonstrates deep technical expertise, evidenced by robust web application projects and contributions to business growth. Holds a rich engineering background, with a demonstrated history in implementing scalable solutions using frameworks like Angular, Node.js, and containerization with Docker. Technically proficient with modern software development practices including microservices architecture, TDD, and CI/CD, enabling efficient SDLC management. Leveraging a Computer Science degree and fluency in English, the engineer has a track record of mentorship, collaborative feature planning, and execution, underpinning a strong career trajectory within diverse remote and hybrid engineering roles.
Senior
Berlin, Germany
Angular
.NET Core
Oracle Database
- .NET + Oracle + Angular 2+ software engineer with over 6 years of experience in software development.- Upper-Intermediate English.- Available ASAP.
Middle
Ukraine
Leadership
Go-to-market strategy
DigitalOcean
RAG
Accomplished software engineer with 15+ years of experience in driving technology solutions across various industries. Expert in B2B/B2C sales strategy with a focus on IT and technology-based applications. Noteworthy for implementing go-to-market strategies and digital marketing campaigns that enhance brand visibility and product reach. Strategic thinker with an MBA in Business Development Management and a strong record in leveraging data insights for business growth. Credits include a marked 25% increase in sales revenue via strategic partnerships and a 40% boost in the sales pipeline with a leading edge in CRM optimization and customer relationship management. Proficient in spearheading team performance and executing market research to elevate competitive standings through innovative product offerings.
Expert
Ruby on Rails
AngularJS
React
- Full-stack Ruby on rails engineer with 12+ years of experience.
- Proven expertise as a Ruby on Rails developer, with a focus on building and enhancing web applications, implementing new features, and optimizing database performance.
- Worked with various frontend technologies such as React, Angular, jQuery, Datatables, ElementalJS, and VueJS
- Developed mobile applications using technologies like React Native and Ionic, contributing to the expansion of platforms and providing a seamless user experience.
- Demonstrated leadership skills as a Team Lead and Senior Full-Stack Engineer, leading projects from inception to completion, managing teams, and ensuring the successful implementation of functionalities.
Senior
Cherkasy, Ukraine
JavaScript 1yr.
React 1yr.
Node.js 1yr.
Express 1yr.
FastAPI 1yr.
- Full Stack Developer with hands-on expertise in MERN stack, FastAPI, and scalable backend API design, delivering 10+ real-time APIs and integrating AI-driven Gemini and OpenAI APIs.
- Proficient in React, Redux, Tailwind CSS, Node.js, Express.js, PostgreSQL, MongoDB, and Docker, optimizing UI performance by 25% and managing complex database operations.
- Experienced in Stripe payment integration, Docker containerization, CI/CD pipelines, and cloud deployment, ensuring secure, maintainable, and production-ready software.
- Strong foundation in Computer Science with a Bachelor of Engineering degree, applying best practices in software development lifecycle, data security, and agile methodologies.
- Demonstrated success in building intelligent features like LLM-based document summarization and dynamic presentation generation, enhancing product capabilities and user experience.
Junior
India
AI/ML
ML
Python
Results-driven AI/ML Engineer who transforms data into actionable business insights. Led development of recommendation systems that increased user engagement by 35% and fraud detection models that reduced financial losses by $2M annually. Expert in building scalable ML infrastructure and cross-functional collaboration, with experience managing full ML lifecycle from research to production deployment. Combines strong technical expertise in Python, PyTorch, and cloud technologies with business acumen to deliver measurable ROI through AI solutions.
Senior
United Kingdom
Python 5yr.
JavaScript 5yr.
React Native 3yr.
Vue.js 3yr.
Kotlin 2yr.
- Over 5 years of experience in full-stack development and technical leadership, specializing in backend API design and financial infrastructure integration.
- Proficient in Python, Flask, SQLAlchemy, JavaScript frameworks (React Native, Vue.js), Kotlin, and multiple SQL databases, with strong expertise in REST & SOAP API development and testing (pytest).
- Led fastest Mastercard integration in Latin America, architected systems for virtual/physical card issuance, antifraud, referrals, and P2P/external wire transfers.
- Experienced in cloud deployment (AWS, Heroku), server management (nginx, IIS), and CI/CD practices using Git, enhancing system reliability and automation.
- Academic background in Mechatronics Engineering and Data Science & AI, awarded for academic excellence, combining engineering principles with software development best practices.
Architect/Team-lead
Mexico
Python 5yr.
JavaScript 5yr.
React Native 3yr.
Vue.js 3yr.
Kotlin 2yr.
- Over 5 years of experience in full-stack development and technical leadership, specializing in backend API design and financial infrastructure integration.
- Proficient in Python, Flask, SQLAlchemy, JavaScript frameworks (React Native, Vue.js), Kotlin, and multiple SQL databases, with strong expertise in REST & SOAP API development and testing (pytest).
- Led the fastest Mastercard integration in Latin America, architected systems for virtual/physical card issuance, antifraud, referrals, and P2P/external wire transfers.
- Skilled in cloud platforms (AWS, Heroku), server management (nginx, IIS), and version control (Git), with experience building scalable, secure financial and educational web applications.
- Holds a Mechatronics Engineering degree and completed advanced coursework in Data Science and AI, awarded for academic excellence, demonstrating strong analytical and problem-solving capabilities.
Architect/Team-lead
Mexico