Upstaff Developer Profile Directory

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.
Data visualization 4yr.
Python 4yr.
Power BI 4yr.
Power Query 4yr.
R
...
Engineer with 4 years in IT, specializing in analytics, data visualization, and machine learning. Proven track record in Agile project execution and innovative solution design. Proficient in Power BI, Python, R, and various ML techniques. Experienced in database modeling and ETL processes, with certifications in Power BI Data Analyst and expertise in multiple data-centric tools. Skilled in optimizing workflows and algorithms for business intelligence across diverse domains.
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Seniority Middle
Location Dubai, United Arab Emirates
Python 6yr.
...
- Python Software Engineer with 6+ years of experience in the IT industry - Fluent English - Beginner Dutch, German
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Seniority Middle
Location Amsterdam, Netherlands
Python 3yr.
ML 2yr.
Node.js
Pandas
NumPy
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Certified Data Scientist bringing an 3+ year commercial expertise, particularly in NLP, CV, and 3D modeling, underpinned by a solid foundation in machine learning and data processing. Commands an advanced proficiency in Python, complemented by adeptness in JavaScript and NodeJS. Demonstrates in-depth experience with Python libraries such as Pandas, numpy, and PyTorch, and excels in deploying solutions with Git, Docker and API development. Proven track record in industries such as SEO and logistics, leveraging statistical models and ML solutions to drive data insights and optimization. Renowned for transforming complex requirements into scalable algorithms and models, with academic credentials in Mechanical and Computer Engineering.
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Seniority Middle
Location Ternopil, Ukraine
Java 7yr.
Kotlin 5yr.
Facebook Auth 4yr.
Node.js 4yr.
Dart
...
Seasoned software engineer with 8 years of rich experience in mobile and full-stack development, particularly in Flutter, Kotlin, Node.JS, and Java. Proven track record in leading development teams and designing robust software architectures, evidenced by successfully delivering a critically acclaimed MVP for a hair color mixing app and dramatically improving an international social media app's performance by 80%. Proficient in Clean Architecture, DDD, CI/CD using GitHub Actions, and efficient RX programming. Strong background in software engineering with a Bachelor's in IT Administration and an Associate Degree in Software Engineering, coupled with hands-on experience in MVC, MVVM, SOLID principles, and various design patterns. Skilled in enhancing software scalability and performance, contributing to substantial revenue growth and client satisfaction through innovative solutions.
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Seniority Senior
Location Yerevan, Armenia
Go 2yr.
JavaScript
Rust
Node.js
NestJS
...
- 6+ years experience as a Software Engineer; - 2 years experience working with Go; - Deep abilities working with Rust; - Good knowledge of creating smart contracts; - 4 years experience working with JavaScript, React, Next.js, Redux; - Experience working with TypeScript; - 3+ years of experience working with Node.js; - Good skills working with NestJS; - Experience working with Python, Swift, Kotlin, Flutter, Express; - Experience working with AWS; - Experience working with PostgreSQL, MongoDB; - Good skills on team lead - led ~12 people; - Took part in all aspects of product design and engineering, from marketing, and business investigation to the MVPs for start-ups, pitch decks, and mock-ups; - Upper-Intermediate English.
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Seniority Senior
Location Estonia
Python 4yr.
JavaScript 4yr.
Django
Flask
Node.js
...
A versatile Full Stack Software Engineer with five-plus years of hands-on experience in several phases of the Software Development Lifecycle. Notable strengths include proficiency in Python and JavaScript, expertise in backend development with Django, Flask, Node.js, and frontend projects using React.js, Next branding. Equipped with practical knowledge in deploying applications on cloud platforms such as AWS, Digitalocean, and Azure, and leveraging Docker and Kubernetes for containerization. The engineer has a solid foundation in database design and querying, using PostgreSQL, MySQL, Elasticsearch, and Redis as data stores. Adept in Agile methodologies, the candidate presents an impressive track record of implementing robust web services and maintaining REST APIs, with a penchant for mastering new technologies and complex problem-solving.
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AA RPA
Business Analysis
Power Automate
Visual Basic .NET
Robot Framework
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Software engineer with 3+ years of experience in RPA and software development. Holds a Bachelor's in Mechanical Engineering and a Master's in Information Systems. Proficient in Power Automate, UiPath, Power Apps, and has extensive work with automation tools across E-Commerce, Healthcare, Finance, and Banking sectors. Technical expertise in scripting and programming languages such as VB.NET, ASP.NET, Java, JavaScript, Python, and SQL. Recognized for significant contributions to client project success and process efficiencies in professional tenure. Skilled in SDLC, RPA lifecycle, cloud services, and migrations from UIPath to Power Automate, indicating versatility and readiness for complex technical challenges.
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Project Management 5yr.
Project Planning 5yr.
Project Scheduling 5yr.
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Software Engineer with 19+ years of comprehensive experience in the design, development, and management of applications across various domains such as E-commerce, Banking, Healthcare, and more. Proficient in a wide array of technologies, including .NET, C#, ASP.NET, SQL Server, MVC architecture, and a strong command over web technologies like AngularJS and ReactJS. Skilled in both Waterfall and Agile methodologies, adept at project management with a successful track record of leading and implementing large-scale applications. Contributions to projects have consistently driven faster MVP releases and enhancements, while fostering team development and overseeing the complete SDLC.
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Seniority Senior
Location Thiruvananthapuram, India
AWS
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- 8+ years of professional expertise in DevOps with a primary skillset in AWS (EC2, EBS, RDS, S3, CloudWatch), Kubernetes/Docker, Terraform/AWS CloudFormation, Prometheus/Fluentd, ELK, Python/Bash, Apache Spark/AWS Athena, CI/CD (Gitlab CI, Jenkins), Kafka - Expertise in building distributed systems using cloud solutions - Establishing a continuous build environment to speed up SDLC - Strong experience with databases - AWS Certified DevOps Professional Certified - AWS-certified associate developer
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Seniority Senior
Location Krakow, Poland
API
microservices architecture
AWS DevOps
CD DevOps pipelines
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Software engineer with a comprehensive 19-year background in integration solutions, boasting certifications in SAP PI 7.3, SAP PI 7.1, and Confluent Kafka, alongside a Computer Science degree from JNTU-Hyderabad. Demonstrates proficiency in Java-based platforms for system and solution development such as SAP BTP Integration Suite (CPI), MuleSoft, and Apache Kafka. Skilled in automated solution deployment on container platforms with scalability, leveraging DevOps tools and microservices architecture. Proven history in leading global implementation projects, integrating both SAP and non-SAP systems in high-stakes environments including telecommunications and insurance domains. Specializes in API management, data transformation, full project lifecycle from design to production, and error handling with robust troubleshooting acumen.
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Seniority Expert
Location Duesseldorf, Germany
Client Communication
Customer Service
Data Management
troubleshooting
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A certified Customer Success Specialist, highly motivated and result oriented with 5+ years of experience providing exceptional customer service. Proven ability to resolve inquiries efficiently, build positive relationships, and exceed customer satisfaction goals. Skilled in troubleshooting, communication, and problem-solving, with a passion for ensuring a positive customer experience. Committed to upholding company values and exceeding performance expectations to foster long-term customer relationships.
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Seniority Senior
Location Abuja, Nigeria
AA RPA
UIPath
QA Automation
Python
Go
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- Seasoned RPA developer with over 8 years of experience, adept at designing, developing, and deploying automation bots using UiPath, WinAutomation, and Power Automate Flow. - Proficient in programming languages such as Python and Go, with a strong foundation in databases like MySQL and MS Access DB. - Comprehensive expertise in UI development and deployment, backed by a solid understanding of SDLC, version control with Git, and proficient use of JIRA and ServiceNow for project management. - Holds a BSc-IT degree from University of Mumbai and has worked with reputed organizations, contributing to significant projects that showcase an ability to collate requirements, execute thorough assessments and develop meticulous design documents, - Proven track record in module leadership at Happiest Minds and previous pivotal roles in large firms like JP Morgan Chase and Tata Consultancy Services. - Demonstrates a deep commitment to quality, skilled at working across multiple operating systems, and frequently engages with the tech community by developing applications and writing technical blogs.
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QA Automation
Python
Data Scraping
Data Analysis
Atlassian Confluence
...
A seasoned Python Automation Engineer with expertise in web scraping, automation scripting, and data analysis. Demonstrated experience with Upwork, some more companies in my resume. entailed providing robust automation solutions, improving data collection processes, and enhancing analytical capabilities. Proficient in Python programming, using tools such as BeautifulSoup, Scrapy, Selenium, and skilled in database management with MongoDB and Cassandra. Technical acumen in API integration complements a strong foundation in software development practices. This engineer’s skill set, combined with practical experience, positions them favorably for roles requiring efficient data handling and process automation.I can complete 1 small project for free to showcase my skills.
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Ruby on Rails 6yr.
Ruby 6yr.
...
- Full-stack Ruby developer with 6+ years of experience in developing both front-end and back-end components of web applications. - Has experience in front-end frameworks, including ReactJS, Angular, Vue3, and React Native. - Proficient in PostgreSQL and MySQL for database design, query optimization, and data storage solutions. Has experience with MongoDB. - Worked with AWS for deploying and managing applications in the cloud. Utilized Kamal for deployment automation and management. - Extensive experience with RSpec for writing test scenarios and ensuring code quality. - Skilled in using Grape for API development.
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Seniority Senior
Location Cherkasy, Ukraine
Dart 3yr.
Swift 3yr.
JavaScript 1yr.
Kotlin
Rust
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Software engineer with extensive experience in mobile development, particularly with Flutter on HealthTech and FinTech products. Strong proficiency in Dart, Swift, JavaScript, Kotlin, and Rust, alongside deep familiarity with technologies such as Flutter, iOS, Android, Firebase, and AWS S3. Demonstrated excellence in applying engineering principles and practices such as Agile, OOP, SOLID, and design patterns like MVVM and MVC. Proven track record of boosting application performance and user retention through strategic optimizations and analytics integration, along with experience in leading teams and enhancing code quality through thorough code reviews and automated testing. Proficient in CI/CD and testing frameworks, adept at crafting responsive layouts, and capable of implementing effective SDLC methodologies.
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Seniority Senior
Location Nairobi, Kenya
IBM DB2
Shell Scripts
Project Management
PostgreSQL
IBM AIX
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Accomplished software engineer boasting over 14 years of expertise in the IT services industry, specializing in database management systems, particularly IBM DB2 and PostgreSQL. Key attributes include adeptness in installation, upgrade, performance tuning, HADR setup, and data encryption. Proven project management skills underscored by leading infrastructure teams. Distinctive achievements include AWS Certified Solutions Architect, with hands-on experience in orchestrating solutions for database services in AWS, and ITIL V4 certification, indicating a strong grasp of best practices in IT service management. Demonstrated ability to automate tasks and enhance system efficiencies, as well as a background in ServiceNow, underlines a commitment to process optimization. The engineer's substantial experience in diverse domains such as banking, finance, and e-commerce provides a robust foundation for tackling varied project demands.
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Seniority Expert
Location Poland
Research Skills
Conflict Management
...
Customer service professional with extensive experience in delivering exceptional service and support. Known for strong communication skills, problem-solving abilities, and a customer-centric approach. Proficient in handling diverse customer inquiries, resolving issues efficiently, and enhancing customer satisfaction. Demonstrated success in streamlining customer service processes, implementing effective solutions, and fostering positive client relationships. Proven track record in improving service quality and achieving high customer retention rates through strategic initiatives and a commitment to excellence.
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C/C++/C# 6yr.
FDD 6yr.
Xamarin 3yr.
Facebook Auth 1yr.
.NET Maui
...
Seasoned software engineer with 10+ years of diversified experience in mobile and software development, including hands-on expertise with Flutter, Xamarin Forms, and .NET technologies. Proven track record of leading end-to-one mobile app development, implementing modern design to responsive UI code, and maintaining exemplary code quality standards. Acknowledged for mentoring junior developers, streamlining deployment processes, and effectively participating in SDLC in agile environments. Proficient in both Arabic and English, with a substantial history of working with international teams and clients.
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Seniority Senior
Location Cairo, Egypt
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.
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GCP 4yr.
Go 1yr.
TypeScript 1yr.
CI/CD 1yr.
Python
...
Software Engineer with 4+ years of experience, specialized in backend systems, Rest APIs, and Blockchain solutions using Go, Typescript, and the Google Cloud Platform (GCP) ecosystem. Proficient in a range of technologies including Dart/Flutter for mobile development, as well as CI/CD, ReactJs, and NextJs for front-end solutions. Holds a BEng in Computer Engineering with ongoing MEng studies, emphasizing a strong foundation in theoretical and applied computer science. Track record of developing scalable mobile applications and optimizing performance, with notable contributions to projects such as the Mbelemama Mobile app and contributions to Bitcoin state representation (Utreexo). Adept in modern software developments practices, particularly focused on microservices architecture and cloud-native technologies.
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Seniority Middle
Location Bamenda, Cameroon
PHP 6yr.
JavaScript 6yr.
...
- Full-stack development with 6 years of extensive experience in back-end and front-end development across various industries, including healthcare, education, consumer goods, and hospitality. - Strong expertise in server-side programming with PHP, including advanced knowledge of PHP 7.x and 8.x. - Extensive experience creating responsive and user-friendly interfaces using HTML5, CSS, and JavaScript. - Skilled in modern JavaScript frameworks and libraries, including JQuery and Ajax for dynamic web applications. - Experienced in utilizing WordPress for content management and website development.
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Flutter 4yr.
GCP 4yr.
Firebase 4yr.
Go
...
* Software engineer with over 4 years of experience in mobile app development, specializing in Flutter and proficient in Dart, Kotlin, and Go. * Strong technical expertise in building robust backend systems, REST APIs, and has a keen interest in Blockchain technology within the GCP ecosystem. * Demonstrated ability in web development using modern technologies including HTML, CSS, JavaScript, React, and NextJs. * Active contributor to open-source projects, enhancing the value of platforms like APIDash and GoCoin. * Holds a Bachelor's and a Master's degree in Computer Engineering, underpinning a solid understanding of software development practices. * Recognized for building impactful mobile applications such as Edutive for education and Racha for addiction management.
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Seniority Middle
Location Bamenda, Cameroon
Dart 4yr.
Kotlin 4yr.
Swift 4yr.
Java 4yr.
JavaScript
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Software engineer with over four years of mobile development experience across multiple platforms and a strong educational background including a BSc Honors in Information Technology. Proficient in languages such as Dart, Kotlin, Swift, Java, JavaScript, and TypeScript, and skilled in frameworks like Flutter, Jetpack Compose, and SwiftUI. Experienced in working with tools like Xcode, Android Studio, and GIT. Has a portfolio of quality applications and a proven track record in full software development life cycle (SDLC), test-driven development (TDD), and collaborating with cross-functional teams to deliver apps with effective UI design and robust security measures.
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.NET 6yr.
Xamarin 5yr.
Flutter 4yr.
Dart 4yr.
Firebase
...
- Commercial Experience with Mobile Development since 2016 in the banking, insurance, health and beauty industries, education and e-commerce - Senior and Lead Developer, able to organize the process of building an application both by himself and by a team - 4+ years of commercial experience with Flutter and Dart - 5+ years of experience with Xamarin - Significant experience in development with Firebase - Proven experience with start-ups in early stages of growth - Extensive experience of work with international companies in Canada, the UK, Saudi Arabia, the UAE, Egypt, Jordan, Kuwait - Experience in MVP and architecture development of complex mobile applications such as mobile banking and e-commerce platforms. - Experience with SDKs and APIs - AI/ML enthusiast - Excellent soft skills scaled up in work in mixed teams in international companies, open-minded, trouble-shooter, great communicator and experienced mentor - Upper-Intermediate English - Native Arabic - Available ASAP
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Seniority Senior
Location Cairo, Egypt
Rust 1yr.
C/C++/C# 1yr.
Solana
Axum
Tokio
...
Software Engineer with expertise in backend development, blockchain technology, and big data, boasting a solid foundation in computer science from Ukrainian Catholic University. Holds a strong junior/middle experience level, with hands-on Rust, C++, and a gambit of modern technologies such as Solana, Axum, and Kafka. Proven track record of developing robust solutions for cryptocurrency swapping and NFT architecture, time-series data manipulation, and digital media copyright solutions. Notable achievements include contributions to open-source projects, and winning a national programming tournament. Fluent in advanced software engineering paradigms and well-versed in real-time streaming and machine learning library development.
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Seniority Junior
Location Lviv, Ukraine
Asciidoc 6yr.
Linux
Unix
...
- Сommerce experience with Asciidoc since 2016, wrote a book using this tool - Github: https://github.com/Patola - English: Fluent - Portuguese: native language. - Spanish: intermediate - French: intermediate
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Seniority Senior
Location Wroclaw, Poland
Java
Kotlin
XML
Android APIs
SQLite
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Software engineer with over 8 years of experience in Android app development and team leadership, proficient in Java and Kotlin. Expertise in application architecture, UI/UX design, database management with SQLite, Room, Firebase, and Firestore. Skilled in project management tools like ASANA, Trello, and Slack. Extensive knowledge in REST APIs, third-party libraries, and payment gateway integration. Proven track record of delivering projects on time using Agile methodologies while implementing best practices in code review, unit testing, and maintaining app performance. Technical acumen is demonstrated through the successful delivery of diverse projects spanning digital wallets, e-commerce, and logistics.
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Seniority Senior
Location Ahmedabad, India
Facebook Auth 5yr.
Dart 5yr.
Java
Kotlin
Crashlytics
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Software Engineer with over 5 years of experience in Flutter development for iOS and Android platforms. Adept at the Dart language, the engineer excels in creating high-performance and visually appealing apps with responsive design. Their technical expertise includes MVC/MVVM patterns, state management, and implementing deep/dynamic linking. Proficient in integrating with various databases like SQLite and Firebase and utilizing PM tools like Trello and Slack. The candidate has a strong background in developing and managing complex projects, evidenced by their history of timely project deliveries and effective client communications. Their significant role in development, testing, and deploying applications with third-party integration and unit/widget testing underlines their comprehensive skill set in software engineering.
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Go
Solidity
...
- Fast-paced, high-quality, detail-oriented, and self-motivated developer with more than 10 years of experience in the IT industry. - I use the TDD approach for designing the architecture and implementing scalable and maintainable web apps/services. - I have been working on a bunch of projects and meanwhile, I worked in several positions across frontend developer, backend developer, full-stack developer, and lead engineer. - Bridge Smart Contract which is for transferring tokens across networks. - NFT Dapps such as madlab, Art Basel, Fateful Youth - eWallet App and GSM e-commerce product. - Smart contracts in complex Defi and DEX structure - Blockchain networks including Ethereum, BSC, Polygon, and Solana. - Deploy and work on various kinds of tokens - ERC20, ERC721, ERC721A, ERC1155. - Cross-chain smart contracts using LayerZero - NFT market smart contract for auction and offer with lazy minting - Proxy smart contract - NFT marketplace Dapp using Venly - Available: ASAP
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Seniority Senior
Location Hong Kong
C
C++
...
- Senior Blockchain & Full Stack Engineer with over 15 years of experience in Web and Blockchain development. - Highly skilled Blockchain Professional with hands-on experience building Decentralized Applications and NFT Marketplaces. - Deep understanding of the architecture and protocols of Blockchain and Hyperledger including Bitcoin, Ethereum, L2 solutions, Cross-Chain. - Concentrating on ICO/IEO/IDO projects, helped many Startups and enterprising companies to raise funds and build Ecosystems on the Blockchain. - Quant Developer with a rock-solid understanding of Financial Markets, Quant Trading. - Strong at Solidity, Python, Rust, Web3.js, React, Typescript, Next.js, Node.js, Moralis. - A Veteran at C/C++/C#. - Great teamwork and troubleshooting skills. - Full-time remote, 40+ hours a week. - Upper intermediate English
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Seniority Senior
Location Canada
Rust
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- 5+ years of experience in blockchain development - Advanced English - Available ASAP
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Seniority Senior
Location Sydney, Australia
Rust
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- 15 years experience with programming languages VB, C/C++; - First projects - embedded devices on AVR/STM32/ESP and applications for windows. - But since ~2017 I'm using an embedded experience very seldom and mostly developing software for Linux on C++. - Since 2022 I have switched the Rust and don't want to use C++ as the main language anymore. - Intermediate English.
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Seniority Senior
Location Ukraine
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