Hire Vetted Design and Creative 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.
Design and Creative
All
Web Application
Data and Analytics
Cloud and Operations
Mobile Application
Blockchain
Digital Platforms
Design and Creative
Quality Assurance
Project Management
Desktop Application
Marketing and SEO
Scripting and Automation
Embedded Systems
Writing and Translation
Low-Code and No-Code
GameDev
Industrial Engineering
Expert with:
* Photoshop and all the Adobe Suite programs
* Game design programs and apps.
* Ableton Live, Reason, Pro Tools, etc...
* Creative thinking and out of the box goods :)
Facebook Auth
Crashlytics
JavaScript
Slim
LCDP
An established Senior Flutter Fullstack Developer with over 20 years of experience in software engineering, boasting a strong technical background with a B.Sc. in Mathematical Physics. This engineer has specialized in cross-platform app design and development since 2011, first with the JavaScript framework Titanium and later adopting Flutter/Dart in 2020. Skilled in a variety of programming technologies, notably iOS, Android, and web development, with proficiency in frontend and backend technologies such as HTML/CSS, JavaScript, Firebase, node.js, and Python. Experienced in leading small development teams, this developer brings advanced knowledge in state management, API integration, and full-circuit backend system creation. The developer's commitment to quality and expertise in a diverse range of software methodologies and architectures is demonstrated by a history of successful projects in multiple business sectors, including fintech, healthcare, education, and animation.
Kotlin 6yr.
Java 5yr.
Android APIs 5yr.
Jetpack Compose 4yr.
Project Management 2yr.
Engineer with a B.Sc. in Mobile Development and over 4 years of hands-on experience in Android development, exhibiting a strong command of Kotlin, Jetpack Compose, and modern software engineering practices. Demonstrated expertise in app architecture modernization, reducing build times by 40%, enhancing app stability with comprehensive testing, and leading migration to scalable, modular architectures. Proven track record of impactful project management, having developed 600+ public-safety apps, and improved essential communication tools with a robust VoIP/messaging suite resulting in a substantial increase in user satisfaction. Competent in cross-functional team leadership, Agile methodologies, and continuous integration/delivery systems, making them a valuable asset for cutting-edge software development teams.
Backbone.js 9yr.
TypeScript 8yr.
SQL/NoSQL 3yr.
Express 3yr.
AWS 2yr.
10+ years of experience in web development, M.Sc in Software Engineering, GAI, LLMs
Front-End: Angular, React, Vue.js (JavaScript & TypeScript)
Back-End: Node.js, Next.js, TypeScript , PHP
Mobile: React Native
AWS Cloud infrastructure
Control systems (e.g., Git) and familiarity with DevOps practices for continuous integration and deployment (CI/CD).
Unit testing, integration testing, and end-to-end testing.
Experience leading and mentoring a team of developers, including assigning tasks, providing guidance, and ensuring the team's success. Ability to motivate and inspire team members, resolve conflicts, and provide constructive feedback.
Experience conducting assessments and interviews remotely.
LCDP 5yr.
Play Framework 5yr.
Swift 5yr.
Objective-C 5yr.
Kotlin
Senior Mobile Application Engineer with 17+ years of experience specializing in cross-platform mobile applications and SDKs. Expert in a wide range of frameworks and languages such as Capacitor, React, Next.js, React Native, Ionic, Flutter, Swift, Objective-C, Kotlin, Java, and proficient in CI/CD practices including Fastlane and GitHub Actions. Demonstrated ability in optimizing app performance, implementing push notification engines, and deploying production apps. Strong focus on secure, scalable API integration and backends, with a history of reducing project timelines through reusable components. Committed to agile methodologies and collaborative team environments, this engineer reflects a superior blend of technical prowess, industry insight, and hands-on experience across fintech, automotive, and healthcare sectors.
HTML 10yr.
CSS 10yr.
TypeScript
WCAG
Angular
With over a decade of specialized experience in frontend development and accessibility engineering, this candidate stands out for their expertise in creating inclusive digital environments compliant with WCAG standards. Their deep understanding of user-centric design is reflected in their proficiency with HTML, CSS, TypeScript, and modern frameworks such as Angular and React. They have a proven track record in performing detailed accessibility audits, leveraging assistive technologies and testing tools to enhance project compliance with European and international laws. The candidate's front-end development experience is complemented with practical proficiency in using ARIA patterns, semantic HTML, and establishing keyboard navigation practices. Their portfolio includes close collaboration with cross-functional teams to successfully implement fixes and features that significantly improve user accessibility, ensuring rigorous adherence to accessibility audits and VPAT documentation.
Blender 3D
- Approached 3D projects with multiple techniques, from modeling to photogrammetry and VR/AR. The quality of my work has won me multiple competitions and sponsors for the projects I worked on.
- Fluent English.
- Native Italian
- Basic Portuguese
- Available ASAP
C/C++/C# 17yr.
OpenGL 17yr.
Qt QML 7yr.
Senior Software Engineer with over 20 years of experience in embedded systems, full-stack development, and 3D graphics across medical devices, aerospace, and gaming industries. Expert in C/C++, Qt/QML, OpenGL (including Safety Critical SC), GLSL, and Python, with strong proficiency in Agile methodologies, Azure DevOps, Jira, and automated testing frameworks. Proven track record in developing complex real-time systems, optimizing performance, and leading cross-functional teams. Holds a B.S. in Computer Science with a focus on Simulation and Graphics.
C/C++/C#
Node.js
- Master's Degree from the Kharkiv National Aerospace University
- Developed a Smart Thermostat with self-learning capabilities and remote mobile app control, utilizing MSP430 microcontroller, ZigBee, and ultra-low power technologies.
- Designed an Energy Management System for remote heating control, incorporating automatic and manual modes, and leveraging STM32, Qualcomm Snapdragon 410, and PCB design.
- Created firmware and PCB design for a Pump Monitoring System with a GUI for pump operation control, employing ESP IDF, FreeRTOS, and memory management.
- Engineered a Mosquito Sensor to detect and transmit data on specific insect forms using STM32L4, LoRa, and GPS technology.
- Expert in programming embedded systems with experience in C, and C++, and integrating various communication protocols such as I2C, SPI, and UART.
- Proficient in using embedded Linux for system development, including working with Qualcomm Snapdragon and managing system resources.
- Experienced in mobile application integration for both iOS and Android platforms, ensuring seamless user interaction with embedded devices.
- Upper-Intermediate English
React 6yr.
React Native 6yr.
JavaScript 5yr.
TypeScript 5yr.
Node.js 5yr.
A highly skilled software engineer with expertise in JavaScript, TypeScript, Node.js, React.js, and a range of databases including SQL (MySQL, PostgreSQL) and NoSQL (MongoDB, Redis). Demonstrates proficiency in HTML, CSS, and responsive design, as well as advanced ORM tools (TypeORM, Prisma) and API development (REST, GraphQL). Adept at state management using Redux, MobX, and has experience with Docker for containerization. Showcases a strong background in computer science, evidenced by work on complex projects such as a global sports streaming platform and an online casino network, revealing a deep understanding of modern web technologies and best practices. Excels in collaborative environments, where they have led teams towards the successful delivery of products meeting stringent performance and reliability standards.
Sales strategies
MS SQL Server Management Studio
Core Location
With over a decade of experience in the software industry, the engineer has a proven record of leading technical initiatives and delivering innovative solutions. Expertise includes Android app development, Java programming, and IT consulting, with a demonstrated ability to drive growth through technology. The engineer's technical acumen is complemented by certifications in Agile methodologies, including ScrumMaster and Agile Scrum Foundation, showcasing a strong understanding of SDLC and efficient project management techniques.
Angular 8yr.
Node.js 5yr.
React 3yr.
Ionic 2yr.
MongoDB
Software Engineer with 9+ years of expertise in full stack development, specializing in Angular, React.js, Node.js, Ionic, and MongoDB. Proven track record in architecting scalable microservices, designing REST APIs, and delivering reusable components across enterprise projects. Experienced in AWS cloud services, Docker, and DevOps practices, with strong skills in UI/UX design and product thinking. Holds a Bachelor of Engineering in Computer Science and recognized for driving modular architecture and leveraging Generative AI to accelerate development and enhance team productivity.
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.
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 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.
React Native 5yr.
JavaScript 5yr.
TypeScript
- 5+ years of expertise in React Native development, specializing in cross-platform UI architecture, Redux state management, and native module integration.
- Proven leadership in managing complex projects, including award-winning apps, with strong skills in asynchronous workflows using Redux Saga and real-time data sync via Firestore.
- Skilled in integrating payment systems (Stripe, PayPal, RazorPay), location services, push notifications, and offline data persistence using SQLite, Realm, and AsyncStorage.
- Experienced in building user-centric solutions for diverse domains such as crisis communication, legal reference, and sports coaching, leveraging Context API, full-text search, and analytics dashboards.
- Holds a Bachelor in Computer Engineering, proficient in JavaScript, TypeScript, and modern development tools (VS Code, Android Studio, XCode) across MacOS, Windows, and Linux environments.
React Native 1yr.
JavaScript 1yr.
HTML 1yr.
CSS 1yr.
Node.js
Engineer pursuing a Bachelor's in Computer Science at Parul University with a 8.30 CGPA, specializing in cross-platform mobile development using Flutter and React Native. Demonstrated expertise in Java, Python, TypeScript, and Dart, with hands-on experience in Firebase, Appwrite, and MongoDB for backend integration. Proven track record in building responsive, UI-intensive applications and websites, emphasizing performance, smooth navigation, and modern design patterns. Skilled in UI/UX design with Figma and frontend frameworks like Tailwind CSS and Material UI, ensuring consistent, user-friendly interfaces. Experienced in full SDLC, implementing authentication, CRUD operations, and database management across multiple projects.
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
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.
Swift 6yr.
UIKit 6yr.
RxSwift
Combine framework
Crashlytics
Senior iOS Developer with over six years of experience in developing high-performance mobile applications. Expertise in designing scalable architectures such as VIPER, MVVM, and Redux and in optimizing app performance through in-depth profiling and code refactoring. Proven track record of improving messaging app stability by 20%, reducing memory usage by 30%, and enhancing fin-tech app user interfaces with custom UI components and animations. Delivered an innovative Bluetooth mobile app, enhancing building time by 25% and memory usage by 15%. Proficient in Swift, UIKit, RxSwift, Combine, Firebase, and Mapbox, with the ability to collaborate seamlessly with cross-functional teams. Possesses an advanced level in English and a strong grasp of various development frameworks and tools.
Facebook Auth 3yr.
Dart 3yr.
A seasoned software engineer with 3 years in mobile development, specializing in Flutter and possessing a strong foundation in Java full stack technologies. Spearheaded development of sophisticated mobile applications including fintech and social media platforms, notably integrating third-party services like Plaid and implementing real-time tracking systems. In addition to solid UI/UX design skills, boasts proficiency with Spring MVC, Hibernate, and MySQL, complemented by full-stack Java development training. Holds a Bachelor's degree in Computer Science and has contributed to open-source projects, showcasing practical expertise in a variety of technical environments. A proven track record of architecting robust applications and optimizing performance through advanced programming techniques and methodologies.
Facebook Auth 5yr.
Dart 5yr.
Power BI 5yr.
Apache Hive 5yr.
Crashlytics 5yr.
Senior Software engineer with over 5 years of experience specializing in Flutter development for cross-platform mobile apps. Mastery in architecture patterns like MVVM, MVP, BLoC, and Clean Architecture, combined with advanced skills in Dart, Flutter, Firebase, and WebRTC. Demonstrated capability in building complex real-time communication applications and ensuring data security aligns with OWASP guidelines. Adept in state management using BLoC, Provider, and Riverpod, and proficient in development tools like Visual Studio Code, Android Studio, Git, and Flutter Inspector. Significant experience with database technologies like Hive, SQFlite, and Firestore, and contributions to enterprise-level projects ensuring performance optimization and crash-free user experiences.
Reverse Engineering
React Native
Android APIs
iOS
• 6+ years of experience in reverse engineering and security analysis of iOS and Android applications, including authentication, password reset, OTP, and account recovery flows;
• Experience with static and dynamic analysis using Frida, JADX, IDA/Ghidra, Hopper, Burp Suite, and mitmproxy, including hooking runtime behavior, traffic interception, and analysis of obfuscated code paths;
• Understanding of network protocols, API behavior, session handling, token flow inspection, and secure communication patterns in mobile systems;
• Skilled in bypassing anti-debugging protections, inspecting native components, and analyzing undocumented logic in React Native, Swift, Kotlin, and mixed-architecture apps;
• Experienced of mapping complex authentication workflows, documenting mobile security mechanisms, producing technical reports, diagrams, and vulnerability-focused flow descriptions;
• Experience optimizing backend/mobile integrated flows with PostgreSQL, caching, throttling, and performance tuning in high-load financial and administrative mobile apps;
• Skilled in mobile application security analysis across fintech, art commerce, and critical operations platforms, including real-time traffic inspection and security hardening;
• Effective communicator with experience collaborating with product, operator, and engineering teams through RFCs, status updates, and structured documentation.
Java SE
Kotlin
Android
Android developer with a strong foundation in software engineering, holding a Bachelor's Degree in IT and Software Engineering, and boasting over 4 years of professional experience. Expertise in Java SE, Kotlin, and Android SDK underscored by proficiency in MVVM, MVP, and Clean Architecture, ensuring scalable and maintainable code. Adept in modern Android development tools like Jetpack Compose and Navigation Component, coupled with mastery in Networking & APIs like Retrofit 2 and Stripe API. Demonstrated abilities in asynchronous programming using Kotlinx Coroutines, and commitment to quality through rigorous test case development. Proven track record in contributing to all phases of the SDLC in various projects, from user interface implementation to application deployment for mobile and Android TV platforms.
Android APIs 5yr.
LCDP
Microsoft Power Platform
Software engineer with hands-on experience in Android development, boasting a solid engineering foundation with a Bachelor's degree in Business Informatics. Demonstrates proficiency in multiple architectures, including MVVM and MVP, and technical fluency in Kotlin, Java, and Android Studio. Known for contributing to complex projects using tools like Dagger2, RxJava, and Realm, and adept at optimizing app performance and integrating third-party libraries. Played a key role in the development of applications in sectors such as e-commerce, delivery, and CRM, leveraging sound knowledge in material design guidelines and handling API interactions. Emphasizes a thorough understanding of project management and SDLC, with a strong ability to lead and collaborate within cross-functional teams.
HTML5
CSS3
JavaScript
Software engineer with 10+ years of experience in UI development and a strong proficiency in web technologies including HTML5, CSS3, JavaScript, and modern JS frameworks such as Angular and React.js. Proven track record of leading technical teams and managing end-to-end development cycles using Agile methodologies. Skilled in tackling complex problems with microservice APIs, Spring Boot, and cloud integration with AWS. Recognized for enhancing product user experience and system architecture through rigorous debugging and testing practices. Holds a B.Tech in Computer Science and multiple Coursera certifications. Advanced knowledge of dev ops tools and version control systems, excelling in fast-paced environments.
NativeJS 15yr.
Play Framework 5yr.
Firebase Cloud Messaging
CI/CD
- Senior Mobile Engineer with 17+ years of experience, focusing on cross-platform mobile application development and SDKs.
- Expertise in various mobile frameworks (Capacitor, React, React Native, Ionic, Flutter) and native (Swift, Objective-C, Kotlin, Java).
- Proficient in CI/CD practices (Fastlane, GitHub Actions, Jenkins), automated deployments, push & messaging tech (APNS, FCM, Courier).
- Strong background in backend and API development, including REST, GraphQL, serverless architectures, along with performance optimization.
- Demonstrated ability in fostering agile methodologies and working with multi-timezone teams to drive project success.
- Holds a BSc in Computer Software Engineering from Sofia University, reflecting a strong technical foundation.
Python 5yr.
TypeScript 5yr.
C/C++/C#
Robot Framework
Dart
Software engineer with a strong focus on AI integration and full-stack web solutions. A proven track record in building AI-powered tools and automating core processes, coupled with expertise in cross-platform development and containerization. Extensive experience with Python, Docker/Nginx, and deploying reliable APIs. Actively pursuing a Bachelor's in Computer Science and excelling in hands-on roles such as Software Research Engineer. Achievements include reducing log review time by 70% and improving customer agents' response rate from 45% to 85%. Adept in languages like C/C++, JavaScript/TypeScript, and possesses advanced skills in frameworks like Django and ReactJS.
Dart
Crashlytics
GetX
Software Engineer with over 4 years of specialized experience in Flutter development, proficient in Dart and well-versed in state management techniques including GetX, Provider, BLoC, and Redux. Highly skilled in building scalable mobile applications with robust data management solutions using Firebase, Firestore, and SQLite, while adhering to MVC and MVVM architectural best practices. Successfully developed and deployed 25+ Android and iOS apps to the app stores, implementing real-time authentication and synchronization features. With a solid academic background holding a Bachelor’s in Computer Application and currently pursuing a Master’s in Computer Applications, I bring both strong technical expertise and a continuous learning mindset. Recognized in senior roles at tech firms for leading projects like Surat Jugaad Plus and Pensive, I have consistently demonstrated problem-solving, debugging, and delivering user-centric applications that scale.
Dart 5yr.
Flutter 5yr.
Software engineer with 5+ years of experience specializing in Flutter application development for a variety of industries, including finance, real estate, and governmental disaster management. Demonstrated expertise in both mobile and web development with a solid foundation in computer science, holding a Bachelor's degree in Informatics Engineering. Proficient in key technologies such as Dart (Flutter), React-Native, and Cordova, with a focus on both frontend and backend development. Adept at collaborating in team environments and employing Agile and waterfall methodologies, the engineer has a strong track record in developing applications that address complex requirements. Proficient in state management (BLoC, GetX) and integrating services such as Firebase and RESTful APIs. The candidate brings a combination of technical acumen and practical experience, poised to make a significant impact on future projects.
Python
Dart
JavaScript
Figma
Microsoft Visual Studio Code
Software engineer with practical experience in mobile and web development, specializing in Flutter and familiar with state management tools like Provider. Demonstrated expertise in creating user-friendly interfaces and features, as reflected in projects such as a pharmacy management system and a comprehensive food delivery app. Collaborates effectively in agile environments, with a history of successful team-based project completions. Strong foundation in computer science from Jimma University, equipped with skills in Python, Dart, JavaScript, and a range of development tools including Figma, VS Code, and Git. Proficient in the use of Firebase for building scalable apps with real-time data, emphasizing clean code practices and responsive design principles. Proactive in acquiring user feedback to refine product functionality.
Git 5yr.
Python
Dart
Agile
Software Engineer with 5+ years of full-stack development expertise, specializing in mobile and backend technologies. Proven ability to deliver 20+ applications across Android and iOS, utilizing languages such as Python, JavaScript, Dart, and Java coupled with proficient use of frameworks like Django, Node.js, and Flutter. Demonstrates strong proficiency in database management with PostgreSQL, MySQL, MongoDB, and Firebase, and excels in setting up CI/CD pipelines and employing Agile methodologies for efficient deployment and iteration. Holds a BSc in Computer Science from Maseno University and is known for sophisticated leadership and team mentorship capabilities, contributing to key projects like Kenya's Government Digital Services and the CapitalPay fintech platform.