Hire Vetted Web Application Engineers at Upstaff - Page 15
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
Go
PHP
- Back-end Software Engineer with 12+ years in the IT industry as a back-end engineer
- Excellent knowledge of different databases and a good level of understanding of complex systems with lots of dependencies.
- 5+ years of recent commercial experience with Go
- Has experience with leading the team of up to 30 engineers,
- Experience mentoring on Codementor, StackOverflow, and teaching
- Upper-Intermediate English
Python 9yr.
Django REST framework 6yr.
FastAPI 3yr.
Flask 3yr.
Versatile Software Engineer with 9 years of experience, bringing a strong background in computer science, particularly in backend development, data processing, and cloud services. Specialized in Python and proficient with frameworks like FastAPI, Django, and Flask. Has engineered complex ETL pipelines, optimized databases including PostgreSQL and Redis, and implemented cloud solutions using AWS and Azure. Excelled in DevOps practices with tools such as Docker, Kubernetes, and Terraform. Demonstrated capability in building scalable, secure applications and services, evidenced by successful project delivery in domains such as e-commerce, human resources, and cybersecurity. With hands-on experience in Stripe payment systems and expertise in system integration, this candidate is equipped to tackle challenging roles in the tech industry.
Rasa
Django
As a passionate AI developer with a strong command over machine learning, data analytics tools, deep learning, Django, Flask, SQL, data extraction, and web automation, I have gained valuable experience through various roles. I have worked as a data analyst on contracts with an Indian MNC, making significant contributions. Additionally, I played a key role in a ship maintenance-based startup by providing a corrosion segmentation solution. Moreover, I have worked on RAG techniques and implemented personalised chatbot features using LLMs like ChatGPT using LangChain technology. I have successfully provided customers more than a million units of required data by implementing efficient data extraction methods.
C++ 7yr.
CMake 5yr.
- Software Engineer with over 7+ years of experience designing and delivering robust software solutions across diverse industries, including manufacturing automation, robotics, audio processing, UAV control, and communication systems.
- Proficient in C++ (C++11, C++17, C++20) with a proven track record in developing both backend and frontend systems using React Native, Qt (QML, Qt Widgets), and PHP-CPP.
- Skilled in creating high-performance multithreaded servers, implementing WebSocket protocols, and integrating cutting-edge technologies such as io_uring and advanced signal processing algorithms.
- Demonstrated expertise in deploying solutions for real-time audio processing, cloud-based parking systems, and 3D modeling of industrial components.
- Experienced in robotics and sensor integrations (Riftek, Nanotec, Rozum, Basler SDKs) for automating precision tasks in manufacturing.
- Adept in database management (MySQL), DevOps (Docker, Bazel, Git), and cross-platform development on Linux, Windows, Android, and iOS.
C/C++/C#
ASP.NET MVC
ASP.NET Core Framework
RESTful API
Accomplished Software Engineer with 5.2 years of experience specializing in the hospitality industry, holding a MCA degree with a high aggregate. Expert in Microsoft technologies, particularly in C#.NET, ASP.NET MVC, and Core, with a track record of implementing successful hotel reservation and marketplace systems. Proficient in Agile and Scrum methodologies, with an aptitude for problem-solving and a commitment to delivering efficient, high-quality software solutions. Key achievements include a 30% reduction in transaction failures through secure payment integrations and a 50% increase in online bookings via a user-friendly customer portal. Skilled in modern development practices and bringing strong expertise in cloud computing with Azure, demonstrated through leadership roles in several high-profile projects at Cyber Infrastructure. Recognized for technical skills in full-stack development, SQL databases, and internet technologies, ensuring that applications meet the complex demands of today’s digital landscape.
Python 7yr.
Django 4yr.
Flask
Celery
Redis
A highly skilled Software Developer with extensive expertise in Python, backed by 7 years of diverse experience in web development, server engineering, and automation. Renowned for building scalable microservices and upgrading applications to Python 3.12. Demonstrates a solid grasp of Django, Flask, Celery, Redis, Docker, MySQL, Linux, and modern frontend technologies like React. Proven ability as a lead developer, creating robust SEO tools and web applications, with a penchant for automating processes and integrating various APIs. Holds a strong background in both application development and teaching, blending technical acumen with a solid understanding of the software development lifecycle.
Node.js 8yr.
Web3.js 4yr.
Solana 2yr.
EthereumJS 2yr.
React
- Full-Stack Engineer with over 8 years of experience specializing in Web2 and Web3 technologies, blockchain development, and Full-Stack architecture.
- Has 4 years of experience working with web3, implementing blockchain solutions using Ethereum, Solana, and smart contracts.
- Proven expertise in tokenization, NFT integration, and cryptocurrency transactions for real estate, voluntary donation, and other industries.
- Expertise in Node JS, Nest JS, and RESTful APIs, with proficiency in React JS for frontend development.
- Strong experience with databases like PostgreSQL, Redis, MongoDB, and DynamoDB.
- Well-versed in cloud services, including AWS and GCP, and experienced in container orchestration with Kubernetes.
- Proficient in CI/CD using Jenkins, GitHub Actions, Bitbucket Pipelines, and Terraform.
- Familiar with Nginx for web server management and ensuring smooth application deployments.
Java 17yr.
Go 9yr.
- A backend developer with over 18+ years of experience in software engineering and more than 9 years of experience with Golang.
- Extensive experience designing and developing Go-based microservices for highly scalable and distributed systems.
- Skilled in leveraging Go’s concurrency model (goroutines, channels) for building efficient and performant systems.
- Proficient in developing REST, gRPC, and GraphQL APIs using Go.
- Expertise in deploying Go applications in containerized environments using Docker and orchestrating them with Kubernetes and Knative.
- Experience with building serverless solutions on AWS Lambda and integrating Go services with various AWS resources (S3, RDS, ElasticCache).
- Automated infrastructure provisioning for Go applications using Terraform and AWS CloudFormation.
- Proficient in designing and implementing scalable REST, GraphQL, and gRPC APIs.
- Expertise in object-oriented design (OOD), test-driven development (TDD), and domain-driven design (DDD).
- Hands-on with frontend technologies like Angular, JavaScript, jQuery, and Dojo for building user interfaces.
Reltio 9yr.
Spring Boot
Databricks
- Certified Reltio technical consultant with over 9 years of strong experience in Master Data Management (MDM), specialized in Reltio MDM and Java.
- Extensive experience in designing, architecting and implementing MDM solution using Reltio.
- Designed and developed data ingestion, data quality, publish module, multiple data quality reports and custom utilities to support business requirements.
- Have worked in different module of Reltio like Data Modeler, UI Modeler, Data Loader, Data Export, External Match and Reference Data Management (RDM)
- Highly experienced in working with Reltio APIs, Postman and develop Java utilities using Reltio API to meet business custom requirements, automation and bug fixes.
- Have experience in configuring Reltio entity, match and survivorship rules, validation rules.
- Hands on experience in application development using Spring Boot, Sprint Data JPA, Mircoservice.
- Have working knowledge of SQL and experience in data analysis and data profiling.
- Was deeply involved in tasks like requirements gathering, code development, testing, deployment and operational support activities.
Vue.js 5yr.
JavaScript 5yr.
ASP.NET MVC 5yr.
C# 5yr.
AWS ElasticSearch
With a robust professional background as a .NET Full Stack Developer, Engineer has established a noteworthy record since December 2019. Specializing in Vue.js, ASP.NET MVC, C#, and JavaScript, the engineer displays adeptness in both frontend and backend development. Proven capacities lie in intricate system components such as RBAC implementations, API management, and Elasticsearch queries alongside advanced JWT authentication patterns. Commitment to best practices is reflected through meticulous optimization of CRM platforms, demonstrating technical agility by harmonizing newer Vue.js versions with established .NET frameworks. Transitioning from legacy systems to modern technological solutions, the engineer has effectively scaled system stability and performance, validating a comprehensive skill set aligned with progressive software development paradigms.
RPA 3yr.
Power Automate 2yr.
Visual Basic .NET
ASP.NET MVC
Software engineer with 3+ years of experience specializing in RPA development across various sectors like E-Commerce, Healthcare, Finance, and Banking. Holds expertise in complete SDLC & RPA lifecycle management, including bot development with Power Automate, UiPath, and the Power Platform suite. Architectural and end-to-end implementation proficiency complemented by strong analytical skills and a track record of delivering high-quality solutions that align with client requirements. Notable achievements include client and business team appreciations for exceptional support and project deliverables. Holds a Master's in Information Systems and several certifications, including PL 900 and PL 500.
PHP 8.1 5yr.
Symfony 4yr.
Hubspot API 4yr.
HubSpot
-HubSpot Integration Engineer with over 3 years of hands-on expertise in creating and implementing custom solutions, integrating HubSpot CRM with various platforms.- Experienced in evaluating technical feasibility, estimation and commercial proposals elaboration during sales processes.- Proficient Hubspot API development and third-party API integrations, delivering data synchronization and custom integrations and workflows. Mostly with PHP, Symfony framework and middleware such as RabbitMQ, deployed to Docker containers.- Skilled in designing processing workflows and data structures for custom business processes, migrations and maintaining analytics tools like Google Tag Manager and Google Analytics for enhanced system monitoring.- Additional expertise in Python, Swift, Kotlin, mostly used for integraitons. Certified in Microsoft Azure AI Fundamentals,
PHP 6yr.
JavaScript 4yr.
Laravel 7-9 4yr.
Symfony
Vue.js
- Software engineer with over 6 years of commercial experience in development, specializing in PHP.
- Extensive experience in developing applications using PHP, including a high-loaded online store using SOLID, DRY, and KISS principles.
- Strong background in building architecture and optimizing databases.
- Skilled in mentoring senior specialists and conducting code reviews.
- Proficient in stress testing and speed optimization techniques.
- Knowledgeable in MVC and Domain-Driven Design architecture, as well as Restful API development using JavaScript and Vue.js.
- Upper-Intermediate English.
- Availability starting from ASAP
Next.js 1yr.
React
Node.js
- Proficient in React, TypeScript, Redux, and Tailwind CSS; skilled in creating dynamic, reusable, and responsive UI components using Material-UI, Ant Design, and SCSS.
- Expertise in Node.js, NestJS, Express, and Firebase; developed RESTful APIs and real-time features using Socket.IO.
- Next.js experience includes server-side rendering, static site generation and used dynamic routing, API integration, and component-based architecture.
- Developed critical full-stack functionality for SaaS platforms, e-commerce solutions with Stripe and Shopify integrations, and real-time applications.
- Migrated platforms from low-code setups to fully custom React solutions.
- Strong knowledge of database management with MongoDB, MySQL, and Airtable, using Mongoose and TypeORM for data modeling.
- Integrated AI features using OpenAI APIs and LangChain.
- Experience with low-code tools like Webflow and n8n to streamline workflows.
- implemented CI/CD pipelines on GitHub Actions,
- Team coordination and management experience, including product roadmap planning, features backlog management, code reviews, maintaining technical documentation for knowledge sharing.
Java
- 10+ years of experience in software development using Java/JavaEE stack
- Proficient in utilizing a wide range of technologies and tools, such as Spring, Elasticsearch, Apache Kafka, Apache Cassandra, Maven, JUnit/Mockito, Jenkins, Kubernetes, Docker, Git, Hibernate, Play framework, and more.
- Skilled in code development, task prioritization, and documentation maintenance.
- Mentored junior developers, performed unit and functional testing, and provided documentation maintenance throughout various projects.
- Participated in the full life cycle of two large enterprise projects
- Practical experience with systems-level designing
- Upper-Intermediate English
Java
Go
- 17+ years experience in IT;
- 8+ years experience working with Java;
- 4+ years experience working with Golang;
- Good knowledge of AWS;
- Experience working with Docker, Kubernetes (K8s);
- Good abilities with MySQL, PostgreSQL, Microsoft SQL Server, Oracle Database, MongoDB;
- Good skills with C, C++, C#, JavaScript, React;
- Experience working with Apache Karaf, Apache Camel, Apache CXF, Apache AMQ;
- Experience working as a team leader;
- Fluent in English.
Angular 7yr.
TypeScript 7yr.
RxJs 7yr.
JavaScript 7yr.
With over 7 years of professional experience, the engineer exhibits a mastery in full-stack development, particularly in the design, construction, and deployment of oriented and web enterprise applications. Proven track record in leading and delivering large-scale projects by implementing efficient collaboration, Scrum principles, and problem-solving strategies. Proficient in SPA development using Angular and React JS, REST API construction using Node JS, and ensuring secure user authentication across various platforms. Technical skill set includes a strong grounding in object-oriented techniques, SOLID principles, and experience with a range of technologies such as Angular, JavaScript, Typescript, Node, and Express JS. Expertise extends to database management, cloud services, and automated testing on multiple platforms. The engineer has actively contributed to complex projects in diverse domains, showcasing the ability to develop scalable and efficient code within a team or as an independent entity.
Python 5yr.
Django 5yr.
PostgreSQL 5yr.
FastAPI 4yr.
Flask 3yr.
Engineer with a solid foundation in software engineering, possessing a Bachelor of Science in Software Engineering from Amity University with a notable GPA of 8.02/10. Expert in various programming languages and frameworks including Python, Django, Flask, and FastAPI, complemented by extensive knowledge of databases such as PostgreSQL and MySQL. Demonstrates strong proficiency in building REST APIs and integrating with systems like Stripe for payment processing and Google Maps. Skilled in modern technologies like Docker, Kubernetes, AWS, GCP, and Agile methodologies, showcasing a capacity to handle Continuous Integration/Deployment and microservices architecture. Noteworthy contributions include developing payment and media services for OQ mobile, crafting SSO solutions, and architectural enhancements for kids' behavior startup. Proven experience in SDLC, software development practices, and deploying complex technical solutions to enhance business processes, making the engineer an exceptional candidate for challenging software engineering roles.
Web3
Node.js
NestJS
PostgreSQL
AWS
- Full Stack Developer with strong blockchain skills.
- Over 10 years of experience in IT.
- More than 7 years of experience with Node.js and Nest.js.
- Strong skills with Express.js.
- Over 7 years of experience with PostgreSQL.
- In-depth knowledge of Docker and Kubernetes.
- Experience with Angular.
- Experienced in blockchain projects since 2017.
- In-depth knowledge of blockchain integration into the backend.
- Upper-intermediate English.
- Available ASAP.
React Native 3yr.
Mobx 3yr.
Front-End Web Development 3yr.
Mobile Application Development 3yr.
With over three years of professional experience, the React Native developer has a strong foundation in mobile application development, demonstrating expertise in state management with MobX. They possess a track record of creating cross-platform mobile apps with a focus on responsive, seamless user experiences and have tackled projects including e-commerce and uptime monitoring solutions. As a holder of a Bachelor's degree in Computer Engineering and currently pursuing a Master's degree in Software of Computer Systems and Networks, the engineer is grounded in a solid theoretical understanding of the field. Their proficiency extends to handling platform-specific challenges and employing varied React Native packages for innovative problem-solving. Engagements in roles ranging from CEO of a start-up to front-end and mobile development showcase a breadth of leadership and technical skills.
Java 4yr.
Python 4yr.
JavaScript 4yr.
Flutter 4yr.
Software engineer with a strong background in computer science, evidenced by a Master's from Concordia University and a Bachelor's from Chitkara University. Expertise lies in full-stack development, with proficiency in Java, Python, C, JavaScript (including Node.js and React.js frameworks), and Dart, accented by practical application in diverse software engineering projects. The engineer demonstrates a deep understanding of dev ops and cloud services, capitalized on when improving infrastructure uptime and performance in various roles. Significant experience in constructing robust applications, including event management and healthcare platforms, with a focus on efficiency, user retention, and front-end development.
Java 2yr.
Python 2yr.
Django REST framework
Software Developer with a First Class BSc. in Computer Science, skilled in Java and Python, specializing in Spring and Django frameworks respectively. Notable experience includes 11 months developing ETL pipeline microservices and optimizing database queries for SAS Visual Investigator. Demonstrated expertise in DevOps and Data Engineering, evidenced by recent AWS Certified Solutions Architect certification. Proven problem-solving abilities with a track record of technical documentation enhancement and resolving complex communication issues between microservices. Extensive experience in full SDLC and software development best practices. Fluent in English and French, with practical knowledge of Spanish.
Java 5yr.
Azure DevOps
Linux
Software engineer with over 10 years of experience specializing in full-stack development and DevOps. Holds a Master's degree in Computer Science from Ho Chi Minh City University of Technology. Proficient in a diverse set of programming languages, including Java, C#, and Python, with extensive knowledge of frameworks such as Spring and Angular. Demonstrated success in leading engineering teams, improving system performance, and working through the full software development cycle. Notably increased yearly revenue by $1.4M through strategic web app re-architecture and boosted ad revenue by overseeing a network managing upwards of $50K annually.
JavaScript 1yr.
MySQL 1yr.
Cs-cart 1yr.
PHP
With over a year of experience, I have developed strong expertise in CS-Cart, MySQL, jQuery, PHP, JavaScript, and CRON systems. My background also includes extensive work with APIs and handling XML, CSV, and XLS file formats, knowledge of Laravel.
Java
Java EE
Spring Boot
Hibernate
C/C++/C#
- 10+ years of experience in software development, developing web and enterprise applications using Java / J2EE, Spring Boot, and Hibernate technologies.
- He has developed and implemented commercial products using modern technology and supported existing value-added services (VAS) systems. Has experience in the customization of PLM /CAD systems for the needs of the enterprise. He built solutions to integrate with external systems and 3PP. Maintenance of work VAS voice products.
- Location: Ukraine
- Available: ASAP
.NET
React
Angular
Vue.js
- 9+ years of experience in designing, building, and maintaining .NET-based applications across various industries, from sports federations to healthcare and corporate infrastructure.
- Proven ability to deliver scalable, high-performance web and back-end systems using C#, ASP.NET Core, Entity Framework, and Azure for cloud solutions.
- Skilled in frontend technologies such as React.js, Vue.js, Angular, and HTML5, with a focus on building responsive, dynamic user interfaces that integrate seamlessly with back-end APIs.
- Experienced in managing database schemas, optimizing queries, and implementing cloud-based data solutions using Azure technologies like Azure Table Store, Azure WebApps, and Azure Cognitive Search.
- Demonstrated leadership in providing code reviews, offering constructive feedback to peers, and leading feature demos for customers and clients.
- Strong communication skills with customers, providing technical assistance and collaborating to define project requirements and resolve issues.
Figma
HTML
CSS
Remote Work Fit
Design systems
I am an experienced UI/UX Designer with a focus on Figma, HTML and CSS. I have solid expertise in creating complex design systems and user-friendly interfaces for various digital products.In my 2+ years of designing user focused interfaces, I have gained experience in carrying out user research, creating wireframes & prototypes, coming up with responsive designs and working with cross-functional teams.I am academically backed with a BSc in Marketing from the University of Nigeria, with additional training in UI/UX Design from Dev and Design HQ and Genesys learnable.
PHP
JavaScript
Next.js
Laravel
React
An adept Full-Stack Developer with over 10 years of experience, specializing in creating robust web applications using front-end and back-end technologies. Holds a Master's degree in Computer Applications with a focus on software development for automated systems. Proven expertise in JavaScript, React, Next.js, Redux, Thunk, jQuery, PHP, Laravel, and various UI technologies, including MUI, HTML5, CSS3, along with MySQL and AWS services. Demonstrated ability to integrate third-party APIs and ensure optimal application performance. Well-versed in agile methodologies and version control using Git. Has a track record of successful project execution in collaborative team settings as well as independent roles, marked by strong problem-solving skills and attention to detail.
bubble.io 3yr.
JetAdmin 2yr.
.NET Core
JavaScript
TypeScript
- 5 years with Low-code/No-Code platforms: JetAdmin (2 years), bubble.io (3 years), Appsmith, SaltCorn including dashboards for sales and marketing, automation.
- A software engineer with 5+ years of experience in backend and frontend development, focusing on .NET, Angular, React.
- Focus on Data Science/Artificial Intelligence, ML, NLP, Time Series Forecasting & Analysis
- GCP/Microsoft/AWS cloud services.
- Master's degree in Data Science in progress.
.NET
C/C++/C#
SQL
Dynamic software engineer with a robust engineering background, transitioning from construction to software development. Over four years of problem-solving in design engineering, augmented by C# programming proficiency and a track record of successful project completion. Expertise in .NET, Entity Framework, and SQL, with recent focus on full-stack development projects like Nimble and GameOverflow. Exhibits a keen understanding of software development practices, adept at using modern technologies and methodologies. Recognized for optimizing performance, enhancing process efficiency, and meeting crucial deadlines.
TypeScript
JavaScript
Node.js
Express
NestJS
An accomplished Senior Backend Engineer with a solid 6-year track record in the tech sector, specializing in APIs, databases, and system optimization. Expertise in software architecture and Agile development using key technologies such as Node.js (NestJs, ExpressJs), React Native, TypeScript, and JavaScript. Proficient in CI/CD with CircleCI, containerization with Docker, and cloud deployment on AWS and GCP. Demonstrable success in leading development projects and teams, evidenced by the delivery of scalable and performant web/mobile applications and innovative software solutions. Holds a Bachelor's degree in Business Information Technology from the Technical University of Kenya.
C/C++/C# 1yr.
Entity Framework 1yr.
React
Software engineer with a focused background in backend development, skilled in C#, .Net Core, Entity Framework, and front-end technologies including MVC and JavaScript. Proven track record of successful project delivery, reflected in the implementation of advanced features such as two-factor authentication, JWT tokens, and real-time communication using SignalR. Demonstrates strong analytical capabilities with experience in financial analysis during internship at Deloitte. Adept at working within the full software development life cycle, from initial design to testing, evidenced by an OOP project that integrated all four main principles and boasted an 80% unit testing coverage on back end. Educated at Queen Mary University with expected first-class honors in Economics and Finance, which complements technical abilities with robust analytical skills. A competitive triathlete, embodying resilience and dedication, essential qualities for high-performance environments.