Hire Vetted Web Application Engineers at Upstaff - Page 13
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
Blockchain
Design and Creative
Digital Platforms
Quality Assurance
Project Management
Desktop Application
Scripting and Automation
Marketing and SEO
Embedded Systems
Writing and Translation
Low-Code and No-Code
GameDev
Industrial Engineering
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.
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
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.
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.
$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
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.
PHP
Symfony
- Experienced in PHP, collaborated with various web development teams to create eCommerce sites
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
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.
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
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
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
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.
$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
$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.
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.
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.
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.
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.
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.
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.
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.
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.
Python 7yr.
Django REST framework 5yr.
FastAPI 5yr.
PostgreSQL 5yr.
AWS 5yr.
- Back-end developer with 7 years of experience specializing in Python frameworks including Django, FastAPI, and Reflex, delivering scalable web applications and AI-driven SaaS platforms.
- Proficient in designing and maintaining complex backend architectures using PostgreSQL (pgvector), Redis, Kafka, and AWS cloud services (Lambda, ECS, S3, Cognito), ensuring high performance and reliability.
- Led development of AI-powered lead intelligence and IoT-integrated fleet electrification systems, implementing advanced workflows with OpenAI API, GraphQL, and asynchronous task management.
- Skilled in full SDLC: architecture design, database schema optimization, API development, testing (pytest, Selenium), CI/CD, and cloud infrastructure management with Terraform and Docker.
- Holds Bachelor’s and Master’s degrees in Computer Science, with strong expertise in software engineering principles, multi-tenant SaaS systems, and integration of third-party APIs for enterprise solutions.
React
React Native
JavaScript
TypeScript
- 7+ years of expertise in frontend and mobile development with a strong command of ReactJS, React Native, and TypeScript, delivering scalable cross-platform applications.
- Proven leadership in architecting solutions, leading React/React Native teams, and driving technical decisions aligned with product and design goals.
- Hands-on experience with modern web and mobile technologies, including Next.js, Redux, REST API, GraphQL, and native Android/iOS modules.
- Skilled in CI/CD pipelines, code quality tools (Eslint, Prettier, SonarQube), and testing frameworks (Jest, Detox, Playwright), ensuring robust software delivery.
- Master’s degree in engineering from a technical university, with a solid foundation in software development lifecycle, Agile methodologies, and responsive, accessible UI design.
Node.js 6yr.
React 6yr.
Python 5yr.
LangChain 1yr.
AI-agents 1yr.
- Senior Software Engineer with 8+ years of experience in fintech, e-commerce, SaaS, and healthcare, specializing in scalable backend and frontend solutions using Node.js, Python (Django), React.js, and AI frameworks like LangChain.
- Proven expertise in designing high-performance REST APIs, secure AWS Cognito SSO integrations, and optimizing system efficiency by up to 40% through caching, indexing, and query optimization.
- Strong background in cloud services (AWS Lambda, Cognito), database management (PostgreSQL, MongoDB, Redis), and modern DevOps practices including Azure DevOps and Docker.
- Experienced in AI-driven feature integration, multi-regional third-party service orchestration, and mentoring teams to deliver business-critical systems in agile, distributed environments.
- Holds a B.Sc. in Computer Engineering, with advanced certifications in ReactJS and NodeJS, and fluency in multiple programming paradigms and secure software design principles.
JavaScript
TypeScript
Node.js
PostgreSQL
React
Senior Full-Stack Engineer with 17+ years of experience in versatile enterprise-grade projects for large service companies (Ciklum).
SOLID principles, OOP, and component-based design in cloud environments, CI/CD pipelines, and performant user interfaces used by large-scale applications:
- Back-End: Node.js, Next.js, PHP;
- DB: SQL (relational MySQL and PostgreSQL) and NoSQL;
- Front-end: JS/Typescript, React, Angular, Vue.js (pet); TanStack Query/Router, performance optimization;
- Cloud deployments on Azure, Vercel, and Netlify, CI/CD pipelines.
Node.js
TypeScript
React
JavaScript
PostgreSQL
- 9+ years of experience in full-stack roles with JS and TypeScript (Node.js, NestJS, React, React Native).
- Israeli fintech, telecom, and gambling solutions, including high-performance systems handling 10,000+ daily transactions, integrating multiple payment providers, including banking APIs and cryptocurrency.
- Holds a Bachelor’s degree in Theoretical and Nuclear Physics, combining analytical rigor with advanced skills in AWS, Docker, GraphQL, SQL/NoSQL databases, and UI frameworks like Ant Design and MUI.
- Background in software engineering principles, OOP & functional programming, and modern SDLC practices, including Agile, CI/CD, and test automation with Cypress and Jest.
Python 8yr.
Django REST framework 6yr.
FastAPI 5yr.
React 2yr.
Flask 1yr.
Backend Engineer, 8+ years of hands-on experience architecting production-grade Python systems — primarily with FastAPI, microservices, and cloud-native infrastructure. Specializes in building reliable APIs (REST + GraphQL via AWS AppSync), high-performance data layers, real-time features (WebSocket), and secure, observable platforms that power AI-driven SaaS, FinTech/loan management, personalized education, and meditation applications.
- Robust, versioned APIs with pagination, filtering, bulk operations, and real-time capabilities for enterprise standards.
- Security models using JWT, OAuth2, Cognito/Firebase Auth, and OWASP plus secrets management in AWS.
- PostgreSQL/SQLAlchemy setups with strict validation, indexing, query tuning, migrations (Alembic), and entity versioning (Continuum).
- Integrations & background jobs (Celery/AWS Lambda), idempotent processing, retries, and Stripe/Telegram/webhook handling.
- End-to-end CI/CD with GitHub Actions, Docker, Kubernetes, ECS, ArgoCD for zero-downtime rollouts and automated testing.
- Full observability stacks (Prometheus + Grafana, CloudWatch) with alerts, dashboards, and runbooks for proactive monitoring.
- Comprehensive operational documentation, team training, and code reviews as a Team Lead managing up to 8 engineers.
Optimized high-load endpoints, reduced latency through caching/profiling, enforced business rules at the DB level, and led refactorings and migrations. Passionate about clean architecture, maintainability, and turning complex business needs into elegant, scalable solutions.
.NET Core 8yr.
TypeScript 6yr.
React 6yr.
React Native 6yr.
Node.js 6yr.
- Full-stack engineer with 6+ years of expertise in TypeScript, React, React Native, Node.js, and .NET Core, delivering scalable B2B and healthcare applications with 40% latency reduction through query optimization.
- Proficient in integrating analytics SDKs (Mixpanel, Firebase, AdMob) and implementing secure JWT authentication and role-based access control in cross-platform mobile apps.
- Experienced in CI/CD pipelines using GitLab CI/CD, automated testing (Jest, Cypress), and cloud deployments on AWS and Docker, enabling rapid iterative releases and A/B testing.
- Strong background in SQL databases (PostgreSQL, MySQL, SQL Server) with advanced query optimization for analytics-driven growth metrics.
- Holds an MSc in Computer Science and IT, skilled in modular architecture, feature flags, and AI-augmented development to accelerate coding and improve UX flows.
Angular 4yr.
NestJS 4yr.
TypeScript 4yr.
JavaScript 4yr.
- Full-stack JavaScript developer with 3+ years of experience specializing in Angular (v2+), NestJS, and TypeScript for scalable, high-performance web applications.
- Proficient in integrating REST and GraphQL APIs, implementing OAuth, SMS OTP, and magic link authentication workflows using Supabase and JWT.
- Skilled in advanced state management with NgRx, reactive forms with RxJS, and custom UI development using Angular Material, PrimeNG, Taiga UI, and Tailwind CSS.
- Experienced in low-code platforms (Appian), CI/CD pipelines, automated testing, and performance optimization leveraging Google Lighthouse and Core Web Vitals.
- Strong background in data normalization, modular architecture, microservices, and secure coding practices including RBAC, bcrypt encryption, and audit trails.
Laravel 5yr.
Node.js 3yr.
Python 3yr.
- Full Stack Engineer with 6+ years of experience architecting scalable web applications and microservices using Node.js (Express) and Laravel, delivering production-grade solutions for UK startups.
- Expertise in AI-powered automation workflows (n8n, LLM APIs, MCP) and event-driven backends, achieving 50% reduction in document processing time and enhanced cross-team visibility.
- Proficient in Python scripting for automation, and skilled in databases including MySQL, PostgreSQL, MongoDB, and Neo4j, with hands-on AWS and Docker deployment experience.
- Strong advocate of TDD, Clean Architecture, OOP design patterns, and modular monoliths, improving code reliability by 60% and system maintainability.
- Holds a Master’s degree in Software Engineering and fluent in Arabic, French, and English, with proven leadership in remote, distributed agile teams.