Hire Vetted Design and Creative Engineers at Upstaff
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
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
Objective-C 10yr.
iOS 10yr.
C++ 10yr.
Swift 5yr.
- Served as a Senior Software Developer in the Two German Automotive Navigation Projects, focusing on System Team operations as well as Map and Routing domains.
- VPN and Network Filtering Development: Extensive experience developing VPN solutions, including cross-platform engines for KeepSolid’s VPN Lite, and expertise in low-level network filtering, proxies, and handling internet traffic.
- iOS Development Expertise: Over 10 years of hands-on experience with iOS development, including business apps and secure communication tools, with proficiency in Swift and Objective-C.
- C++ Proficiency: Strong background in C++ for developing core network functionalities, optimizing performance, and building cross-platform applications.
- Enterprise Application Development: Skilled in developing enterprise-level applications, including parental-style internet filters and device policy management tools.
- Agile Methodologies: Proven track record of working in Agile Scrum environments, delivering high-quality software with fast iteration and strong collaboration.
- Leadership and Team Collaboration: Experience as a Tech Lead, mentoring teams, and coordinating with stakeholders to resolve issues and implement new features.
- Available to start ASAP
Expert
Odesa, Ukraine
Python 5yr.
Django 3yr.
Mobile development
Flask
API
- Python Developer with 6+ years of experience in backend development and automation: Django (4 years), Flask, and Fast API for web application development;
- Built and supported Telegram bots and automation tools for business operations (dApp Marketplaces, Crypto ATMs, Payments and Casino games)
- Maintaining and supporting production systems using FastAPI and SQLAlchemy, API integrations including financial services and crypto platforms;
- Docker containerization: Docker-compose, Docker via Render (serverless). Deployment and Linux server management (Ubuntu);
- Familiar with data reporting and basic analytics through internal monitoring tools; - Open to part-time and distributed team environments with a focus on ongoing system support.
- Reached the Top 10 freelance Python engineers on the local market at the age of 17 (showcasing early talent and initiative).
- Worked on projects with a multi-million user base, contributing to scalable architecture and high-load system stability.
- Successfully launched an educational platform in the USA, now actively used by students, tutors, and academic institutions.
- Represented the dev team at the international Wefi Beyond Banking Summit, delivering a product presentation to a global fintech audience.
Middle
Ternopil, Ukraine
Swift 2yr.
IOS SDK 2yr.
UIKit 2yr.
SwiftUI 2yr.
Objective-C
- iOS Developer with 2+ years of experience delivering high-performance VPN and utility apps, proficient in Swift, Objective-C, and modern concurrency (async/await).
- Skilled in multiple architectures and design patterns including MVVM, MVC, VIPER, TCA, and Coordinator.
- Expertise in full mobile development lifecycle from UI implementation based on Figma designs to App Store deployment, with strong integration experience (Adapty, Amplitude, AppsFlyer, Firebase).
Middle
Poland
HTML
CSS
Ruby
Java
- Proficient in front-end and back-end development with expertise in HTML, CSS, Ruby, Java, and Vim, complemented by 3+ years of hands-on experience in software engineering.
- Currently engaged in networking projects, applying practical knowledge of system integration and network protocols to enhance infrastructure reliability.
- Strong foundation in Information Technology from Karatina University, emphasizing software development lifecycle (SDLC) and modern programming paradigms.
- Skilled in using Blender for 3D modeling, demonstrating versatility in both software development and digital content creation.
- Fluent in English and Kiswahili, facilitating effective communication in diverse team environments and cross-functional collaborations.
Senior
Kenya
HTML
CSS
Ruby
Java
- Proficient in front-end and back-end development with expertise in HTML, CSS, Ruby, Java, and Vim, complemented by 4+ years of academic and practical experience in Information Technology.
- Currently engaged in networking projects, applying software development lifecycle (SDLC) principles to deliver scalable and maintainable solutions.
- Strong foundation in software engineering methodologies, with hands-on experience in programming paradigms and tools including Blender for technical visualization.
- Academic background from Karatina University, specializing in Information Technology, ensuring a solid understanding of computer science fundamentals and engineering principles.
- Demonstrated ability to integrate diverse technologies and tools to optimize system performance and user experience in real-world applications.
Senior
Kenya
UI/UX
Palm Infotech is a leading Software and App Development Company offering tailor-made mobile and web solutions for startups, SMEs, and enterprises. We specialize in Android, iOS, NodeJS, React Js, Fluter and cross-platform apps with ERP integration, and are known for building high-performance products like fantasy sports apps, astrology-based platforms, food and grocery delivery apps, taxi booking systems, clinic management tools, and other on-demand applications. From MVP implementation to robust order management systems, our team focuses on scalable, intuitive, and AI-powered apps that align with business goals. With expertise in UI/UX, backend architecture, and third-party integration, we deliver end-to-end development along with ongoing maintenance and post-launch support. Palm Infotech is trusted for its timely delivery, responsive communication, and quality-driven development across industries.
Senior
Aldie, United States
UX
UX research
- Extensive experience in leading UX research initiatives, with a focus on enhancing user experiences through observational research, ideation workshops, and design thinking methodologies.
- Proven ability to uncover critical user insights, drive product development strategies, and lead cross-functional teams to achieve significant business growth and user engagement.
- Deep expertise in behavioral research, including conducting user interviews, observational studies, and analyzing complex data to uncover key behavioral patterns and user needs.
- Certified in Design Thinking Workshop Facilitation, with a strong ability to lead workshops using tools like Mural and Miro, fostering innovation and creative problem-solving.
- Certified Scrum Master (CSM) with expertise in Scrum methodologies, capable of leading agile teams to deliver high-quality products on time.
- B.Tech in Computer Science and M.S. in Research in Computational Natural Sciences (Cognitive Neuroscience) from IIIT Hyderabad, with a strong foundation in both technical and research-oriented disciplines.
Senior
New York, United States
Ext JS
FDD
XML
Java
Python
A proactive and technically skilled software engineer with a BS in Computer Science from the University of Washington. Experienced in creating robust web and mobile applications utilizing advanced technologies such as Next.js, Java, Python, JavaScript, Node.js, PyTorch, and sklearn. Adept at optimizing data structures and algorithms and keen on adopting machine learning to enhance software solutions. Holds key certifications, including Oracle Java, and is committed to continuous learning. Brings a solid background in leading team operations to improve service quality and operational efficiency, with over five years of experience in supervisory roles. Eager to contribute to innovative projects in a collaborative environment.
Junior
Puyallup, United States
Dart 5yr.
Kotlin 3yr.
GraphQL 3yr.
MVVM+Rx 3yr.
Software engineer with 5+ years of experience, specialized in Flutter development and project architecture. Core competencies include mentoring Flutter teams, setting development standards, and implementing CI/CD pipelines. Impressive track record of creating applications using MVVM, GraphQL, RestAPI, and a range of other technologies like Firebase and Chromecast, with experience in developing native plugins with Kotlin, Java, Swift, and JavaScript. Demonstrable expertise in enhancing the performance of legacy projects and modularizing project structures. Education includes ongoing studies in Analysis and Systems Development and a background in Computer Technology. Highly skilled in front-end development, database design, DevOps practices, and mastering various programming languages. Proficient in applying Agile principles and proven problem-solving abilities, coupled with strong leadership and mentoring skills.
Senior
Brazil
Objective-C 8yr.
API 8yr.
Swift 5yr.
IOS SDK 5yr.
Seasoned iOS Developer with 8.6+ years of experience in the IT industry, specializing in mobile application development using Swift and Objective-C. Well-versed in Cocoa Touch, iOS SDKs, and frameworks like AFNetworking, with hands-on experience using Pods and Git for dependency and version control.Strong academic foundation with a B.Tech from Kuppam Engineering College (JNTU), and a proven track record of delivering high-quality applications using MVC and MVVM architectures in Agile environments. Expertise includes BLE integration, QRCode/Barcode scanning, biometric authentication, memory management, and performance optimization.Successfully contributed to multiple enterprise-level apps, including Rinnai Central, Honda PSP, and VELYS Patient Path, improving user experience, reliability, and code efficiency across contract and full-time roles.
Senior
Bengaluru, India
Facebook Auth
Dart
Kotlin
MVVM+Rx
GraphQL
Software engineer with 5+ years of experience specializing in Flutter development, adept at leading teams, and establishing development standards. Proven track record in architecting and deploying mobile apps with complex functionalities, including synchronous video players, multiple themes for whitelabel solutions, and comprehensive content management systems. Skilled in creating robust CI/CD pipelines (Codemagic, GitHub Actions) and implementing security measures aligned with backend infrastructures. Proficient in native plugin development across Kotlin, Java, Swift, and JavaScript. Educational background includes ongoing studies in Analysis and Systems Development, with strong problem-solving and team leadership abilities.
Senior
Brazil
Payment Gateways 5yr.
WordPress 5yr.
Laravel 7-9 3yr.
Unity 2yr.
Ant Design 1yr.
Developer
Expert
Caracas, VenezuelaExpert 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 :)
Expert
Ljubljana, Slovenia
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.
Expert
Winchester, United Kingdom
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.
Senior
Birmingham, United States
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.
Expert
Lagos, Nigeria
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.
Expert
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.
Expert
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
Junior
Milan, Italy
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.
Senior
United States
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
Expert
Ukraine
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.
Middle
Poland
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.
Expert
React 9yr.
Blockchain 2yr.
Spring Boot
Gemini 3
OpenAI
I am a senior software architect and blockchain automation engineer , with over 20 years of professional development experience and 4+ years dedicated to crypto, trading bots, WebSocket systems, and SaaS automation platforms.
My career spans enterprise systems, mobile applications, cloud analytics, authentication infrastructure, and large-scale data platforms — evolving into high-performance blockchain automation and bot engineering across Solana and Ethereum ecosystems.
I specialize in building:
- Real-time token tracking systems
- Telegram trading bots
- Solana Token Bundling, Deployment and tracking platforms,
- Rug detection & dev-sell intelligence
- MongoDB-driven analytics platforms
- Event-driven SaaS backends
All systems are designed for 24/7 uptime, restart persistence, and real trader usage — not prototypes.
Core Expertise
Blockchain & Crypto
- Solana Web3.js
- Ethereum (EVM)
- Pump.fun SDK
- Token metadata indexing
- Market cap & liquidity tracking
- Dev-sell detection
- Rugpull analysis
- ATH / ROI analytics
- Wallet behavior monitoring
Bot & Automation Systems
- Trading bots
- Token sniper trackers
- Telegram bots
- Volume simulation bots
- Alert engines
- Subscription lifecycle managers
Real-time ranking systems
Expert
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.
Senior
India
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.
Junior
Islamabad, Pakistan
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.
Senior
United Kingdom
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.
Architect/Team-lead
Mexico
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.
Senior
India
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.
Junior
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.
Junior
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.
Senior
Adama, Ethiopia