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Sergii, Core Graphics Developer

Last Job: 18 Sep 2023

- Experienced iOS developer with 7+ years of commercial experience in IT; - Proficient in Swift and Objective-C programming languages; - Strong knowledge of object-oriented programming (OOP) and design patterns; - Skilled in using iOS technologies such as UIKit, SwiftUI, Xcode, Core Data, Core Animation, and more; - Familiar with various architecture patterns like Clean-Swift, MVC, MVP, MVP-C, MVVM+C; - Experienced in working with REST APIs using URLSession and Alamofire; - Proficient in using Git and SVN for source control; - Familiar with agile development methodologies like SCRUM and Kanban; - Strong attention to detail and ability to work in a team environment; - Excellent communication skills and ability to work under pressure; - Fluent in spoken and written English at an upper-intermediate level.

Core Graphics

iOS

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Oleksii C., Core Graphics Developer

Last Job: 17 Sep 2024

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- 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

Core Graphics

Objective-C 10 yr.

C/C++/C# 10 yr.

Swift 5 yr.

iOS 10 yr.

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Roman Z., Core Graphics Developer

Last Job: 23 Aug 2023

- Java lead developer with 11+ years of complete circle engineering, development teams management, and architecture design. - Full-Stack Development Proficiency covering frontend technologies like AngularJS, Angular 11, ReactJS, and backend technologies including Java 8-14, Spring Boot, Hibernate, and more. - Proven Expertise in architecture design, system migration, and refactoring, enhancing performance and maintainability. - Specialized in RESTful APIs, designing, implementing, and optimizing high-performance APIs to facilitate seamless integration. - Successful Project Delivery, including Internet banking systems, contract management platforms, legal aid services, and ISP monitoring systems. - Strong Database Management Skills, with experience in PostgreSQL, OracleDB, HBase, Hadoop, and MongoDB. - 7+ years of experience as a Lead Engineer, leading teams of 10+ developers - 5+ years of experience as an Architect - Upper-intermediate English

Core Graphics

Java

Angular

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Oleksandr P., Core Graphics Developer

Last Job: 4 Jul 2023

- 20 years of IT experience including 8 years of iOS development experience. - Strong knowledge of Objective-C and Swift - Experience in developing iOS GUI with custom design, animations, and auto layouts. iOS Human Interface Guidelines. - Experience with REST API. - Knowledge of version control systems: Git, TFS. - Strong macOS, UNIX and MS Windows skills. - Experience with third-party libraries and APIs like MapBox, Facebook SDK, Twitter SDK, etc. , - Pre-intermediate English. - Available ASAP.

Core Graphics

iOS

Swift

Objective-C

Yurii G., Core Graphics Developer

$33/hr

Last Job: 4 Jul 2023

• 5 years of commercial experience. • Solid various application architecture development with scaling functionality and clear further maintenance and support, including follow-up documentation preparation. • Refactoring and rewrite experience applied for outdated application that required complex updates and modern OS targeting and support. • Ability to read, review and improve non-documented code, code review strong experience and team lead practices. • Crashlogs maintenance (Debugging with Xcode, Crashlytics SDK). • Upper-intermediate English. • Available Full-time. • Ready to start in one week . • No scheduled vacations within next 3 months.

Core Graphics

Swift

RESTful API

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Vitalii Stalynskyi August 29, 2023

I have been working with Upstaff for over a year on a project related to landscape design and management of contractors in land design projects. During the project, we have done a lot of work on migrating the project to a multitenant architecture and are currently working on new features from the backlog.When we started this project, the hiring processes were organized well. Everything went smoothly, and we were able to start working quickly. Payments always come on time, and there is always support from managers. All issues are resolved quickly.Overall, I am very happy with my experience working with Upstaff, and I recommend them to anyone looking for a new project. They are a reliable company that provides great projects and conditions. I highly recommend them to anyone looking for a partner for their next project.

Henry Akwerigbe August 30, 2023

This is a super team to work with. Through Upstaff, I have had multiple projects to work on. Work culture has been awesome, teammates have been super nice and collaborative, with a very professional management.There's always a project for you if you're into tech such Front-end, Back-end, Mobile Development, Fullstack, Data Analytics, QA, Machine Learning / AI, Web3, Gaming and lots more.It gets even better because many projects even allow full remote from anywhere!Nice job to the Upstaff Team 🙌🏽.

Roman Masniuk August 25, 2023

I worked with Upstaff engineers for over 2 years, and my experience with them was great. We deployed several individual contributors to clients' implementations and put up two teams of upstaff engineers. Managers' understanding of tech and engineering is head and shoulders above other agencies. They have a solid selection of engineers, each time presented strong candidates. They were able to address our needs and resolve things very fast. Managers and devs were responsive and proactive. Great experience!

Volodymyr August 11, 2023

Leaving a review to express how delighted I am to have found such a great side gig here. The project is intriguing, and I'm really enjoying the team dynamics. I'm also quite satisfied with the compensation aspect. It's crucial to feel valued for the work you put in.Overall, I'm grateful for the opportunity to contribute to this project and share my expertise. I'm thrilled to give a shoutout and recommendation to anyone seeking an engaging and rewarding work opportunity.