Hire Vetted Web Application Engineers at Upstaff - Page 14
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
Laravel 5yr.
React 3yr.
TypeScript 3yr.
Vue.js 2yr.
Django REST framework 1yr.
Software Engineer with over a decade of experience in developing scalable web and mobile systems using diverse tech stacks including Laravel, Django, Golang, Ruby on Rails, React, and TypeScript. Proven expertise in building secure RESTful APIs, optimizing databases (MySQL, MongoDB, PostgreSQL), and implementing cloud infrastructure on AWS. Skilled in Agile/Scrum methodologies, CI/CD pipelines, and cross-functional collaboration. Notable contributions to high-traffic platforms such as ruparupa.com, erafone.com, and berniaga.com, demonstrating strong backend and frontend development capabilities.
Java 5yr.
Spring Boot 5yr.
microservices 5yr.
Azure DevOps 3yr.
Go 1yr.
Senior Software Engineer with 6+ years in backend development, specializing in Java (8-17) and Golang. Proven expertise in microservices architecture, event-driven systems, and cloud-native solutions using Kubernetes, Docker Swarm, and AWS. Skilled in implementing Temporal workflows, SAGA pattern compensations, and observability stacks (ELK, Grafana, Prometheus). Experienced in CI/CD pipelines, infrastructure-as-code, and legacy system modernization. Holds a Bachelor in Software Engineering with strong foundations in software development lifecycle, testing, and DevOps practices.
JavaScript 8yr.
React 8yr.
Node.js 8yr.
TypeScript 3yr.
Ext JS 3yr.
Senior FullStack Engineer with 8+ years in eCommerce and software development, proficient in JavaScript, TypeScript, React.js, Node.js, Next.js, and Express.js. Skilled in cloud infrastructure using AWS (EC2, S3, Lambda), containerization with Docker and Kubernetes, and database optimization for MongoDB and PostgreSQL. Experienced in CI/CD pipelines (Jenkins, GitLab CI), Agile methodologies, TDD, and microservices architecture. Holds a Bachelor's degree in Computer Science from Tallinn University.
React 7yr.
Node.js 7yr.
Express 7yr.
MongoDB 7yr.
I am a Senior Full Stack Developer with over 10 years of extensive and deep experience designing, developing, and deploying high-performance web applications and enterprise-level platforms. My expertise spans the entire technology stack, allowing me to deliver robust, scalable, and maintainable solutions from concept to production.
Python 4yr.
Django REST framework 4yr.
RESTful API 4yr.
FastAPI 4yr.
Flask 4yr.
Engineer with a Computer Engineering degree (GPA 86/100) and 4+ years of experience specializing in backend development using Python frameworks including Django, DRF, FastAPI, and Flask. Proficient in designing scalable RESTful APIs, asynchronous systems with Celery and Redis, and database optimization with PostgreSQL, MySQL, and MongoDB. Experienced in deploying containerized applications via Docker and cloud platforms like AWS and Google Cloud. Skilled in integrating AI/ML models (TensorFlow, PyTorch) for NLP and predictive analytics, and mentoring developers on clean code, testing, and best practices within Agile environments.
Python 5yr.
Flask 5yr.
FastAPI 3yr.
Django REST framework 3yr.
Senior Python Developer with 5+ years specializing in scalable backend systems, RESTful APIs, and AI-driven data pipelines using FastAPI, Django, and Flask. Proven expertise in LLM integration (OpenAI, Deepgram, Vapi) and prompt engineering for real-time AI workflows. Experienced in microservices architecture, cloud DevOps (AWS, Docker, CI/CD), and data processing with Pandas and NumPy. Holds a BSc in Electrical Computer Engineering and currently pursuing MSc, with a strong foundation in software development best practices and system design.
JavaScript 2yr.
TypeScript 2yr.
NestJS 1yr.
Ext JS 1yr.
React 1yr.
Software engineer with extensive experience in scalable backend development using NestJS, Kafka, and BullMQ, coupled with frontend expertise in Next.js and React. Skilled in designing optimized RESTful APIs, complex data querying with MySQL, MongoDB, and ClickHouse, and implementing microservices architectures. Proficient in TypeScript, JavaScript, and advanced DevOps tools including Docker, AWS EC2, and Jenkins CI/CD. Demonstrated ability to build high-performance platforms with real-time data processing, pagination, and responsive UI, supported by strong open-source contributions and problem-solving proficiency evidenced by 250+ DSA problems solved.
React
Ext JS
SOLID
Node.js
Python
Engineer with 8 years in Web3 and AI/ML development, specializing in decentralized applications and scalable web platforms using React, Next.js, Laravel, and EVM-based blockchain tech. Proficient in Solidity, Python, Node.js, and Rust, with expertise in smart contracts, Web3.js, and AI integration. Experienced in Agile/Scrum methodologies, CI/CD pipelines, and remote collaboration. Holds a Computer Science degree from University College London and has led projects for Ocean Protocol and major streaming platforms using Next.js for high-performance, SEO-optimized frontends.
Node.js 2yr.
NestJS 2yr.
RESTful API 2yr.
GraphQL 1yr.
Web3.js 1yr.
Experienced Backend Developer with a strong foundation in Computer Science and over 3 years in fintech, Web3, and real estate domains. Proficient in TypeScript, NestJS, PostgreSQL, MongoDB, and blockchain tools such as Web3.js and Ethers.js. Led major projects including Bloomvest V2 migration to PostgreSQL and scalable API design, Trilla's real estate fractional ownership platform, and high-performance blockchain indexers. Skilled in modular architecture, real-time communication via WebSockets, and secure multi-role backend systems, delivering robust, scalable decentralized and centralized applications.
C/C++/C# 2yr.
.NET Core 2yr.
Entity Framework 2yr.
ASP Web API 1yr.
.NET Core Web API 1yr.
Experienced .NET Developer with over 4 years in full-stack development, proficient in C#, .NET Core, ASP.NET MVC, Web API, and Entity Framework. Skilled in front-end technologies including HTML, CSS, jQuery, AJAX, and foundational React. Expertise in Microsoft Dynamics 365 (Navision) integrations using Codeunits, XMLports, and SOAP, along with advanced T-SQL database modeling and optimization. Demonstrated ability in developing middleware solutions for retail POS systems and backend services for real estate applications. Holds a Bachelor of Science in Computer Science and has applied software engineering principles to deliver scalable ERP and reporting solutions.
React 10yr.
TypeScript
Node.js
Vue.js
AWS
- 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.
C/C++/C# 5yr.
MySQL 5yr.
Azure Data Factory 2yr.
.NET Core 1yr.
ASP.NET MVC
Software engineer with 5 years of expertise in Microsoft technologies, including C#, ASP.NET Core, Azure Functions, and SQL Server. Skilled in full-stack development with Angular and TypeScript, implementing SOLID principles, Repository and Dependency Injection patterns for scalable solutions. Proficient in Azure Data Factory migrations, cloud serverless architectures, and optimizing SQL queries. Experienced in Agile methodologies, DevOps practices, and leveraging AI tools like GitHub Copilot to enhance development efficiency.
React 1yr.
TypeScript 1yr.
Node.js 1yr.
Express 1yr.
MySQL 1yr.
Software Engineer with over 1 year of experience specializing in full-stack web development using React.js, TypeScript, Node.js, Express.js, and MySQL. Holds a B.E. in Computer Science and Engineering with strong expertise in building scalable e-commerce platforms, real-time analytics, and automated HR systems. Skilled in designing optimized database schemas and RESTful APIs, delivering performance gains including 40% faster page loads and 45-60 ms reduced query times. Proficient in AWS deployment, machine learning with Python and TensorFlow, and responsive UI/UX design, driving end-to-end project delivery in agile environments.
JavaScript 1yr.
TypeScript 1yr.
React 1yr.
React Native 1yr.
Node.js 1yr.
Full Stack Developer with 1+ years' experience specializing in MERN stack and cross-platform mobile applications. Proficient in JavaScript, TypeScript, React, React Native, Node.js, and backend API development with Express.js. Experienced in implementing OTP authentication, role-based access, and integrating payment gateways like PhonePe. Holds a Bachelor’s degree in Information Technology and skilled in database management using SQL, MySQL, PostgreSQL, Firebase, and Supabase. Delivered scalable, production-ready solutions including a published Google Play Store app and a secure travel booking platform.
Python 1yr.
JavaScript 1yr.
TypeScript 1yr.
Go 1yr.
Software engineer with robust backend expertise, specializing in Go, Python, TypeScript, and C++. Holds a B.Sc. in Computer Science and Engineering with a 3.8 CGPA from a top Ethiopian university. Experienced in designing secure authentication systems for 5,000+ users using JWT, bcrypt, and Redis, and proficient in OAuth2 integration. Skilled in real-time backend development with WebSockets and Supabase, optimizing system performance by up to 30%. Adept in API design and documentation, enhancing maintainability and cross-team collaboration. Recognized for high-impact contributions in multilingual platform development and data-driven projects, with a strong foundation in algorithms, data structures, and machine learning. Proven ability to mentor and lead, fostering rapid onboarding and agile development practices.
JavaScript 5yr.
Node.js 5yr.
React 5yr.
Vladyslav S. is a Senior JavaScript Developer with 6+ years of experience specializing in React.js, React Native, and Node.js. Experienced with AWS services (Lambda, ECS, RDS, DynamoDB), Firebase, Terraform, and CI/CD pipelines (GitHub Actions, Docker). Proficient in REST APIs, state management (Redux, MobX), and modern frontend frameworks like Next.js and Angular. Strong team collaborator with clean code practices and a focus on scalable architecture.
Python
TypeScript
Architecture and Design Patterns
Software Engineer with expertise in competitive programming, solving 1000+ problems on LeetCode/Codeforce, and demonstrated experience in architecting full-stack applications. Proficient in backend development with Python and Node.js, also skilled in mobile app development using Flutter. Track record includes developing high-performance RESTful APIs that handle 50K+ daily requests and implementing scalable FastAPI backends. Bachelor of Science in progress with a focus on software architecture, AI/ML systems from Adama Science and Technology University. Achievements include ranking 8th in ETCPC National Finals among 200+ teams and excelling in core programming languages and software development methodologies.
JavaScript 5yr.
TypeScript 5yr.
Python 5yr.
SQL 5yr.
HTML5 5yr.
Full-Stack Engineer with 5 years of experience building end-to-end web applications, distributed systems, and modern frontend experiences. Deep expertise in TypeScript, Next.js, Node.js, PostgreSQL, and cloud-native architectures.
Known for shipping high-quality features fast, owning projects from concept to production, and collaborating effectively in remote, async teams. Comfortable with modern tooling, AI-assisted development workflows, and architecting reliable, scalable solutions used by thousands of users.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.']
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.
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.