Hire Vetted Web Application Engineers at Upstaff - Page 2
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
Operations and Cloud
Mobile Application
Digital Platforms
Blockchain
Design and Creative
Quality Engineering and Testing
Delivery Management and Analytics
Desktop Software
Writing and Translation
Marketing and SEO
Scripting and Automation
Embedded Systems
Low-Code
GameDev
Industrial Engineering
React 4yr.
Ext JS 2yr.
TypeScript
React Router
Tailwind CSS
Accomplished software engineer with a demonstrated history of working in the information technology and services industry. Skilled in building scalable React applications, with a strong emphasis on front-end development and user experience. An effective leader with experience as a Senior React Developer and Front-end Lead, focusing on defining problems, clarifying specifications, and taking full ownership of projects. Successfully transitioned from earlier sales and operations roles to full-stack development, showcasing versatility and a continuous learning mindset. Education includes a Bachelor of Science in Information Technology with high accolades. Technically proficient in React, TypeScript, Next.js, and modern development tools, with a solid foundation in software development practices.
Senior
Mecca, Saudi Arabia
Python 5yr.
Django REST framework 5yr.
SQL 5yr.
Celery 4yr.
FastAPI
Software engineer with 5 years of experience, excelling in Python/Django backend development and cloud-ready API creation. Proven track record includes architecting a One-Time Setup wizard for Adagrad AI that slashed deployment time by 95%, and designing a SaaS automation platform at Ascent Wellness & Pharma that saved $4,000 monthly and cut manual workflows by 70%. Skilled in advanced databases and cloud operations, with effective system design showcased by the development of a real-time analytics platform that won 3rd place in Maruti Suzuki’s innovation challenge. Holds a Bachelor's degree in Engineering and is proficient in Python, SQL, Django, FastAPI, and a suite of tools and technologies pivotal to modern software development, including Docker, RabbitMQ, and PostgreSQL. Recognized for innovation with awards such as Employee of the Quarter at Adagrad AI.
Middle
Mumbai, India
Flask
Python
Django REST framework
Software engineer leveraging robust academic foundation in Computer Science with hands-on experience in Flask, Python, and Django to build scalable web applications. Proven track record in deploying high-traffic websites leveraging advanced Django framework. Strong comprehension of software development life cycle principles, ready to contribute to cutting-edge technology projects.
Intern
Abbottabad, Pakistan
React Native
Next.js
React
Redux-Saga
With over 12 years in the software industry, this Senior Full Stack Technical Lead excels in leading teams and architecting a wide range of applications using technologies like ReactJS, NextJS, React Native, Flutter, and NodeJS. This includes proficiency in Redux-Saga and Redux-toolkit for state management, as well as utilizing MaterialUI for UI development. Versed in both front-end and back-end coding languages, methodologies, and databases, they consistently deliver complex projects, such as a BBL Bank web application and managing a city center web portal in Saudi Arabia. Their engineering prowess is backed by a Diploma in Software Engineering and a B.Sc., reinforcing their strong theoretical foundation. Methodically familiar with SDLC and agile practices, they are adept at project management using JIRA and have experience in AWS environments. Additionally, their technical toolkit encompasses CI/CD pipelines with Jenkins and CircleCI, and version control expertise with Github and Gitlab.
Architect/Team-lead
Ahmedabad, India
TypeScript 5yr.
JavaScript 5yr.
React 3yr.
Playwright
Cypress
A seasoned Software Engineer with over 5 years of specialized experience in frontend development and test automation, as well as a decade in the IT sector. Key competencies include advanced proficiency with React ecosystem, TypeScript, JavaScript, Material UI, Next.js, and familiarity with backend technologies like C#. Proven track record in leading feature initiatives to improve user experiences and operational efficiency, signified by a 40% reduction in duplicate entries and a 60% rise in proactive permission requests at a cloud kitchen operations platform. Expertise in continuous integration and delivery pipelines, demonstrated by contributions to Azure DevOps and CI/CD best practices. Capable of handling both development and QA roles effectively, evidenced by the establishment of test automation frameworks using tools such as Cypress and Playwright. Adept in a variety of programming environments and methodologies, the engineer has successfully orchestrated end-to-end functional testing, test design, and has a strong record of professional advancement as a self-learner and analytical problem solver.
Middle
Poland
JavaScript
TypeScript
React
React Native
Node.js
- Experienced Software Engineer with over 3 years at Securiti and prior engagement at Unique Software Development and KoderLabs, showcasing a strong engineering background and hands-on experience in contemporary software development practices and technologies.
- Proficient in JavaScript, TypeScript, React, React Native, Node.js, Nest.js; knowledgeable in MERN Stack, SQL, NoSQL, Azure, and skilled in managing software development life cycle (SDLC) in Agile environments.
- Demonstrated technical expertise through multiple project deployments on Android and iOS platforms, and adept in employing Test Driven Development with tools such as Jest for ensuring high-quality software.
- Bachelor of Science in Computer Software Engineering reinforcing a sound understanding of computer science fundamentals, paralleled by practical application in predictive analytics within the oil and gas industry.
- Valuable contribution to AI-powered cybersecurity solutions, enhancing privacy compliance through PRIVACI.ai platform development at Securiti, with focus on automation and scalability.
- Efficient in Agile software development, with capabilities in Clojurescript, parallel computing, and various programming methodologies, principles, paradigms, and patterns.
Senior
Karach, Pakistan
OOP 2yr.
QA Automation
Data Analysis
Software engineer with close to 3 years of experience specializing in AI automation, proficient in Python programming, and experienced in backend systems and workflow automation. Holds a partially completed Bachelor's degree in Business/Commerce with an expected graduation date of March 2026. Demonstrated history of working as a self-employed AI Automation Specialist since March 2023, focusing on data analysis and automation solutions. Notable for applying modern software development practices to optimize operations and improve efficiency.
Middle
India
C/C++/C# 5yr.
ASP.NET Core Framework 5yr.
.NET Core 5yr.
Entity Framework 5yr.
RESTful API 5yr.
Back-end Software Engineer with over 5 years of experience in designing, building, and optimizing complex systems for multi-tenant SaaS platforms, government portals, and HR management applications. Demonstrated proficiency in C#, .NET Core, ASP.NET, and Entity Framework, with a solid grasp of microservices, RESTful API development, and DDD. Proven ability in leading technical teams and executing agile project delivery while maintaining a strong focus on database optimization and robust security protocols. Holds multiple Azure certifications and an education in Computer Science, underlining a deep technical background.
Senior
Python 6yr.
Django 6yr.
FastAPI 6yr.
JavaScript
TypeScript
Software Engineer with over 6 years of expertise in high-scale system architecture, proficient in Python (Django, FastAPI, Flask) and front-end technologies (JS/TS, Node.js, React.js). Excelled in DevOps practices with experience in CI/CD automation, AWS infrastructure, and agile methodologies. Played a pivotal role in building a B2B marketplace supporting 10M+ daily users, optimized search performance by 20x, and improved API responsiveness and compliance accuracy in blockchain analytics. Holds a BS in Computer Science.
Senior
Baku, Azerbaijan
React 10yr.
TypeScript
Node.js
Vue.js
- Full-Stack Engineer with 10 years of experience building and scaling web and SaaS products across fintech, edtech, martech, crypto, energy, and AI-driven domains.
- Skilled in JavaScript, TypeScript, and Python, with hands-on experience in frontend development using React, Next.js, and Vue.js, and backend development with Node.js, NestJS, Express, and Python-based frameworks.
- Designed and implemented system architectures for complex platforms, including distributed systems, microservices, real-time applications, and API-driven products with PostgreSQL, MongoDB, Redis, ClickHouse, and Elasticsearch.
- Led full-cycle development of high-load platforms such as crypto trading systems, communication automation tools, educational video platforms, and SaaS products, from requirements and architecture to production launch and scaling.
- Integrated AI and machine learning components into production systems using OpenAI APIs, LangChain, FAISS, PyTorch, and other AI tooling for personalization, automation, and content generation.
- Built and maintained infrastructure using Docker, Kubernetes, Terraform, and CI/CD pipelines, working extensively with AWS and Google Cloud environments.
- Experienced in technical leadership, including frontend architecture ownership, mentoring engineers, hiring, and organizing engineering teams across multiple projects.
Senior
Valencia, Spain
Python
AWS
C/C++/C#
LLaMA
LangChain
Software Engineer with over 10 years of experience, specializing in AI and full-stack development, demonstrating a strong foundation in computer science with a B.Sc. from the University of Illinois at Chicago. Expert in Python, C#, JavaScript, and cloud technologies such as AWS, Docker, and Kubernetes. Skilled in machine learning frameworks including TensorFlow and PyTorch, further evidenced by AWS Certified Machine Learning and TensorFlow Developer certifications. Proficient in deploying scalable web systems and integrating AI models into high-throughput environments, with a proven track record of enhancing model accuracy and system performance in production-grade systems.
Senior
Los Angeles, United States
Go
Observer
Kotlin Coroutines
Django Channels
MS SQL Server Management Studio
Seasoned Backend Engineer with over 5 years of experience specializing in Golang, adept at constructing scalable microservices and REST APIs. Demonstrated expertise in concurrency patterns and system design, backed by a strong computer science foundation with a B.E. in Computers achieving a 9.18 CGPA. Proficient in a wide array of technologies, including Go 1.18+, Gin, gRPC, PostgreSQL, and AWS cloud services, complemented by a hands-on background in DevOps practices like Docker and Kubernetes. Significant contributions to projects like a facilities management platform, industrial data management system, and e-commerce platforms, showcasing skills in optimizing database performance and developing high-performance APIs with sub-100ms response times. Embraces agile methodologies and has a proven ability to mentor other developers and lead technical initiatives.
Senior
JavaScript 4yr.
TypeScript 4yr.
React 4yr.
Ext JS 4yr.
Node.js 4yr.
Expert Full-stack Developer with advanced capabilities in TypeScript, React/Next.js, and Node.js. Possesses a Bachelor's in Computer Science and has taken specialized courses in Full-stack development and blockchain technologies, reflecting a commitment to continual learning. Proven track record in building and scaling high-load applications, particularly in the healthcare, media, and decentralized tech sectors. Demonstrates strength in creating responsive UIs, implementing complex back-ends, and ensuring high code quality through rigorous testing. Technical skill set includes modern JavaScript frameworks, RESTful and GraphQL APIs, microservices, and cloud services (AWS, GCP), supplemented by practical knowledge of SQL/NoSQL databases, Docker, and CI/CD pipelines. Fluent in essential industry practices and proficient in English and several other languages, making for a versatile asset in international and cross-functional teams.
Middle
Germany
FDD 6yr.
React
Vue.js
Ext JS
Senior Software Engineer with over 6 years in full-stack development and technical leadership. Specializes in the MERN stack, excelling in React.js, Node.js, and modern web technologies. Adept in architecting scalable solutions, microservices architecture, and utilizing DevOps practices such as Docker and Kubernetes. Instrumental role in projects like a customizable Hotel TV Application Platform and a GPS-enabled Golf Cart Navigation System. Proven experience in Agile/Scrum methodologies and mentoring developers. Notably led teams to enhance application performance and design secure, innovative systems for various industries.
Architect/Team-lead
Office 365
Allure Report
App Service
HTML
CSS
A skilled Full Stack Developer with a recent boot camp completion that equipped them with modern technical and digital skills, supplemented by over 10 years of experience in administrative roles which involved office management and data reporting. They possess a strong mix of technical skills including proficiency with Microsoft Office Suite, HTML, CSS, JavaScript, APIs, and a grasp of UX Design and App Marketing. Furthermore, they understand version control through Github, emphasizing their adaptability to contemporary software development practices. Their commitment to improving work efficiency is demonstrated by a 20% reduction in administrative errors and the processing of high-volume data entry tasks at a 90% accuracy rate. With a foundation in computer practices and ongoing full-stack development education, they are well-prepared for roles that demand both cutting-edge coding abilities and proven administrative expertise.
Junior
Johannesburg, South Africa
C/C++/C# 10yr.
ASP.NET MVC
RESTful API
.NET Core
MySQL
['Extensive 10-year background in .NET development, specializing in enterprise-level application design and maintenance.', 'Crucial role in developing large-scale systems at an international organization, demonstrating ability to work under demanding conditions.', 'Expertise in full .NET stack: C#, .NET Core, ASP.NET, coupled with front-end technologies Angular/React, and database management using SQL Server.', 'Proven track record of delivering secure, reliable, and high-performance solutions with a focus on clean, maintainable software architecture.', 'Practical experience in Agile, version control with Git, continuous integration & deployment (CI/CD), and integrating complex third-party systems.', 'Skilled in converting complex business requirements into technical solutions, with clear communication and collaboration in distributed team environments.']
Senior
JavaScript 6yr.
TypeScript 6yr.
Node.js 6yr.
React 6yr.
- Full Stack Developer with over 6 years of experience in creating and delivering web applications, with Node.js, React, and TypeScript and DevOps skills.
- Specialized in engineering high-performance solutions in domains such as E-commerce, Fintech, and Entertainment. Skilled in RESTful and GraphQL APIs, relational databases,
- Postgres, MySQL/MariaDB. AWS Certified Developer Associate, holds Master's Degree in Software Engineering
- Strong command of Node.js, TypeScript, NestJS, PostgreSQL, and scalable system architecture. Over the years, he has demonstrated exceptional ownership, engineering judgment, and the ability to solve complex backend challenges independently.
- Hands-on experience building distributed, reliable, and high-performance systems on AWS, including serverless components, data pipelines, CI/CD automation, and infrastructure-as-code using CDK and Terraform. His strong debugging abilities and deep understanding of relational data modeling make him particularly effective in performance-critical environments.
- Direct experience working with AI-native platforms. On the Visiblie.ai project, he integrated ChatGPT, Perplexity, and Google AI Overviews into backend workflows, implemented real-time analytics, and ensured system scalability and observability - experience that closely aligns with your platform’s needs.
- AWS Developer Certification further confirms his level of technical maturity.
Senior
Ukraine
TypeScript
JavaScript
React
Node.js
PostgreSQL
Full-stack developer with solid experience in React.js, Angular, and Node.js, building high-performance and secure applications across fintech, travel, and real estate domains. Experienced with DBs (Postgres, Mysql), backend services written in Go, integrating AI/LLM platforms via API and integrating Conversational AI tools like Voiceflow. Comfortable working in mixed environments, with end clients, elaborating engineering decisions and shaping solutions to match business needs.
Senior
Ukraine
HTML
CSS
JavaScript
Python
The engineer has a proven track record as a Junior Technical Consultant in SAP B1 at Edel Tech, adept in crafting complex reports, layouts, and SQL queries for enterprise applications. Garnering a commendable 81.21% in BCA from Solapur University, the candidate boasts strong programming proficiency in HTML, CSS, JavaScript, Java, and Python, and is well-versed in database management with SQL and HANA. The engineer has demonstrated skills in various tools and technologies such as HANA, SSMS, VS Code, and Eclipse, with a solid foundation in unit testing and agile development methodologies. Through leading projects like a Vehicle Rental System and a Hotel Management System, the candidate effectively combined web development and backend process optimization. This software engineer's adaptability, problem-solving skills, and technical expertise make them a valuable asset poised for contributing to the success of a future employer.
Junior
Angular 4yr.
TypeScript 4yr.
React 1yr.
Next.js 1yr.
Angular Material UI
Software engineer with a strong focus on frontend development utilizing modern frameworks such as Angular, React, and Next.js with proficiency in TypeScript. Demonstrates expertise in creating scalable and maintainable web applications with a history of improving codebases adhering to SOLID principles and optimizing for performance to achieve high Lighthouse scores. Established a record in implementing white-label solutions, UI component libraries, CI/CD pipelines with Docker, and comprehensive test coverage with Cypress. Brings experience in technical leadership, including guiding teams and enhancing product accessibility standards. Holds an education in Information Systems and Technologies, communicating fluently in English and Serbian as part of an international collaborative environment.
Senior
Belgrade, Serbia
Python
Java
JavaScript
C/C++/C#
PHP
Software Engineer with hands-on experience in AI training and software development. Proficient in Python, Java, C++, JavaScript, PHP, and MySQL. Skilled with TensorFlow, Scikit-Learn, and PyTorch. Master's and Bachelor's degrees in Software Engineering and Intelligent Systems from Kirinyaga University. Developed an AI-augmented code optimization framework and an academic performance predictor using ML techniques. Strong background in full-stack system development, machine learning model evaluation, dataset annotation, and software engineering research.
Junior
Kerugoya, Kenya
HTML5 4yr.
CSS3 4yr.
React 4yr.
Redux-Saga 4yr.
Software Engineer with a Master's degree in Food Technology and Engineering and extensive full-stack development experience. Expertise spans internal platform construction, workflow automation, data processing optimization, with strong proficiencies in HTML5, CSS3, React, Redux, Node.js, Express.js, and database management systems like MySQL and PostgreSQL. Proven track record in deploying through Azure and implementing CI/CD pipelines, alongside proficiency with cloud & AI tools, Chrome Extension development, and comprehensive understanding of SDLC and modern software engineering principles. Key achievements include database performance enhancements leading to near-instant response times, tripled productivity via automation, and the provision of mentorship with over 3000 code reviews, signifying a well-rounded technical proficiency and a commitment to development best practices.
Middle
Node.js 1yr.
TypeScript 1yr.
RESTful API 1yr.
PostgreSQL 1yr.
Optimism
Backend developer with 1 year of experience specializing in Node.js, TypeScript, and database management using PostgreSQL and MongoDB. Proven expertise in building REST APIs and executing performance optimization. Demonstrated flexibility by learning new technologies, Python (Django) and React, to deliver key projects. Proficient in Git, Redis caching, and Winston logging. Currently pursuing a bachelor's degree in Information Technology, with a solid foundation in software engineering principles and practices. Seeking a backend role to apply strong problem-solving skills and full-stack integration expertise.
Middle
Node.js 5yr.
React 5yr.
JavaScript
TypeScript
10+ years building full-stack web applications for enterprises of various sizes. Experience spans frontend and backend development, API design, and working with both relational (PostgreSQL, Oracle) and NoSQL (MongoDB) databases. Strong foundation in JavaScript/TypeScript ecosystem with React and Node.js.
Senior
Ukraine
Node.js 5yr.
NestJS 5yr.
Express
MongoDB
PostgreSQL
Full-stack JavaScript Engineer with a proven track record in building robust web applications end to end. Key expertise includes Node.js, React.js, and Vue.js, with proficiency in both frontend and backend. Adept at API design, MongoDB and PostgreSQL advanced knowledge and TDD practices. Proficient with AWS, containerization, and CI/CD.
Senior
Ukraine
TypeScript 5yr.
JavaScript 5yr.
SQL 5yr.
NestJS 5yr.
Express 5yr.
Versatile Full Stack Engineer/Lead with over 6 years of experience, specializing in creating robust web platforms and SaaS applications. Expertise in TypeScript, JavaScript, SQL, and a range of backend technologies including NestJS, Express, and TypeORM. Proficient in database management with Postgres, MySQL, MongoDB, and utilizing Redis and similar key-value stores, Familiar with AWS, GCP, and Azure. Skilled in CI/CD pipelines, Docker, caching, and queuing mechanisms, along with comprehensive testing abilities using Jest and Postman.A strong grasp of software architecture, particularly in microservices and event-driven systems, with a background in developing financial systems, IoT, and productivity tools.
Architect/Team-lead
Ukraine
React 5yr.
TypeScript 5yr.
Ext JS 4yr.
Redux 4yr.
Frontend Developer with expertise in building high-performance web applications specializing in React, Next.js, TypeScript, and state management libraries. Served key sectors including fintech, edtech, and e-commerce, with a knack for enhancing existing applications and crafting new feature-rich solutions. Skilled in integrating third-party services and APIs, performing migrations to modern frameworks, and optimizing for both performance and maintainability. Clearly demonstrated abilities in developing complex UI components and handling advanced frontend development tasks, backed by consistent application of coding best practices, a modern tech stack, and a commitment to quality via tools like ESLint and Prettier.
Senior
JavaScript
TypeScript
Node.js
React
Ext JS
Software engineer with 12 years of full-stack development experience, specializing in scalable application architecture using technologies such as Node.js, React.js, and TypeScript. Expertise in backend engineering, notably in the US-based FinTech sector, with a track record of delivering real-time transaction systems, financial workflows, and secure third-party integrations (Stripe, Plaid, MX). Proficient in creating AI voice agents with modern APIs and cloud services, coupled with frontend development skills to optimize UI performance. Holds a Master's degree in Computer Application, adept at employing Agile methodologies, and excels in building solutions across various domains including FinTech, Healthcare, and E-commerce.
Senior
India
Java
Go
Python
Node.js
React
Engineer with over 8 years of experience specializing in digital health and fintech platforms, with a robust track record in scaling microservices architecture and AI-driven solutions. Expertise in cloud-native infrastructure and full-stack development, leveraging technologies such as React.js, Java, Go, Python, and AWS. Significant achievements include enhancing PCI-DSS controls for payments processing, improving latency and system resiliency, leading large-scale global deployments, and ensuring compliance with various security standards. Holds a Bachelor's degree in Computer Science from Florida Institute of Technology and is adept at modern engineering practices and delivering business-oriented results in cross-functional settings.
Senior
Orlando, United States
Python 7yr.
.NET 4yr.
ASP.NET Core Framework 4yr.
Node.js
FastAPI
A seasoned Senior Software & Machine Learning Engineer with extensive experience in backend engineering, AI/ML, and data engineering. With a decade of professional involvement, the engineer boasts a deep understanding of distributed computing and database design, having worked with technologies like .NET, Python, Spark, and Kubernetes. Education includes a BSc in Computer Science & Artificial Intelligence, reinforcing a solid foundation in modern engineering principles. Holds a proven track record of implementing intelligent systems, such as conversational AI platforms and deep learning models, that have significantly improved user engagement and reduced operating costs. The engineer's technical acumen is further highlighted by expertise in full-stack development, including the use of React, Svelte, and Angular, and in creating robust cloud-based solutions leveraging AWS. This combination of practical experience and education makes the engineer a standout candidate for driving innovation and efficiency in complex software environments.
Senior
Ireland