Senior iOS Developer

Ajax Systems is a leading international technology firm recognized as the largest developer and manufacturer of Ajax security systems equipped with smart home functionalities in Europe. Our innovative ecosystem comprises over 280 devices, mobile and desktop applications, and robust server infrastructure. With a dynamic growth trajectory year after year, we proudly employ over 5,100 talented individuals dedicated to enhancing security for 4.5 million users across 187 countries.Our System Department is at the forefront of making devices smarter by transforming them into fully-fledged IoT solutions. The team is responsible for the development of OS Malevich, a modular RTOS tailored for various hardware platforms, and the Ajax Cloud, utilizing technologies such as Java 20 / Kotlin, AWS, Akka, NATS, Kafka, MongoDB, and MySQL. We develop applications for iOS (Objective-C, Swift), Android (Java, Kotlin), and Windows/macOS (Python / C++, QT, QML) to empower users, installers, and engineers to effectively manage, maintain, and monitor our systems.

Your impactful role: As an iOS Developer, you will...Design, develop, and maintain innovative applications for the iOS platform, collaborating with a talented team.Engage with cross-functional teams to define, design, and implement new features that enhance user experience.Conduct unit tests to ensure code robustness, handling edge cases, usability, and overall application reliability.Identify and resolve bugs while continuously improving application performance.

We are looking to strengthen our team at Guru Apps with a talented Junior iOS Engineer who will actively participate in product experiments alongside our dedicated team.Guru Apps is a multi-product company within the Universe Group, focused on developing global iOS applications in the utility and AI niches.Our products optimize the digital routines of millions of users worldwide daily — from memory cleaning, document management on your phone, to AI tools for photo editing and content creation.Over the years, we have achieved remarkable milestones:— Surpassed 100 million downloads— Expanded into 185 countries— Consistently ranked #1 in the App Store, surpassing giants like Google, Netflix, and Instagram— Established leadership in our niches, setting quality standards in the utility and AI categories— Launched our own R&D laboratory, where we create at least 2 new products each year and develop proprietary AI technologies— ⭐ Maintained an average rating of over 4.6 in the App StoreAt Guru Apps, we embrace speed, experimentation, and ambition to build global products with a distinctly Ukrainian DNA. If you want to experience what it’s like to work within a community united by the ambition to create a unicorn from Ukraine, check out this video about Guru Apps.You are the perfect fit if you:Want to impact the product. Our developers influence both technical and product decisions. We discuss these as a team, where everyone can voice their opinion and propose ideas.Aspire for growth — we have an experienced team eager to share knowledge. Interested in vertical growth? Here, it all depends on your desire and work results.Are ready to develop category-leading products — we have already achieved impressive results, and there’s much more to come!

Ruut is a digital coaching platform focused on helping athletes and runners make smarter daily decisions about training and recovery. By using metrics like HRV, Ruut aims to improve performance stability and reduce injury risk through clear actions and personalized running plans. This Mid-Level iOS Mobile Engineer role centers on shaping both the product and the broader engineering culture. The team values engineers who want to influence features, architecture, and the pace of business development, not just write code. Ruut operates in Kyiv and Warsaw, with a team that welcomes responsibility and thrives on building meaningful solutions together. Role overview Take ownership of iOS development for Ruut’s core product, contributing to both features and foundational engineering practices. Influence technical decisions, optimize processes, and help the team deliver faster. Work closely with product managers, designers, and fellow engineers, with significant autonomy in your area. What you will do Develop, improve, and support new features in the iOS app. Contribute to the main product and explore new directions for the platform. Build and enhance mobile infrastructure, including CI/CD, testing, and release processes. Implement observability tools for logging, crash tracking, and metrics. Integrate AI tools and automation into development and delivery workflows (using tools such as Cursor, Codex, or Claude). Collaborate with product and design, while making independent technical decisions. Shorten time-to-market through faster releases, A/B testing, and rapid iteration. Requirements Experience in mobile development, especially on iOS. Background working with product teams or startups. Desire for impact, ownership, and the chance to work with modern approaches, including AI. Comfort with responsibility and building alongside a talented team.

Speechify seeks an iOS Core Product Software Engineer based in Kyiv, Ukraine. The position centers on creating and refining iOS applications that support users in reading more easily and effectively. Teamwork is a key part of the day-to-day, with frequent collaboration across different specialties. Role overview This engineer will play a direct role in shaping the core iOS experience for Speechify’s users. The work involves both building new features and enhancing existing ones, always with a focus on reliability and usability. What you will do Design, develop, and test new features for Speechify’s iOS apps Work with cross-functional teams to deliver reliable software Contribute to the deployment of high-quality solutions for a global user base

Role overview Vacancies seeks a Senior Frontend Developer in Kyiv to help grow our product team. This position focuses on expanding development capacity and improving the quality and scalability of our frontend architecture. The team values developers who bring strong Vue experience, care about clean code, and approach design thoughtfully. What you will do Work closely with the team to deliver new product features Refactor and improve existing frontend codebases Boost product performance and scalability Share ideas to enhance both code and workflow Own tasks and ensure they are completed Who thrives here Developers with deep Vue expertise People who show initiative and ownership Those who care about clean, maintainable architecture Individuals able to work independently and move projects forward without sacrificing quality The product Since 2020, the team has built a global platform connecting people across backgrounds, religions, and cultures. Over 1 million visitors use the site each month, with users from the USA, Australia, and other countries. The platform ranks among the top 5 in its category, recognized for high-quality video and a seamless experience even during peak traffic, maintaining 99.99% uptime. The product is ad-free, focusing on genuine connections supported by advanced UX/UI. Features include AI-powered content moderation, strong data protection, and tools for building authentic global relationships. The next milestone: reaching the top 3 among international web-based social networking services.

Join us as a Senior Python Developer where you will play a pivotal role in enhancing our software solutions. You will collaborate with cross-functional teams to design, develop, and maintain high-quality applications. Your expertise in Python and deep understanding of software development principles will be essential in driving innovation within our projects.

nix provides corporate brand protection and domain management services to large enterprises, including Fortune 500 companies. The company specializes in domain registration, online brand monitoring, and anti-counterfeiting solutions. Role overview This Senior PHP Developer position centers on a major modernization project. The team is combining two legacy client portals into a single, unified platform. The goal is to deliver all current features in the new system before moving clients over. Technology stack PHP with Laravel RabbitMQ MySQL Nuxt.js (Vue.js) AWS Location This role is based in Ukraine.

Join Ajax Systems, the premier international technology firm and Europe's leading manufacturer of security systems, as a Senior Java Developer. We specialize in cutting-edge solutions for video surveillance, smart home technology, fire detection, and flood prevention. Our extensive product portfolio includes 180 advanced wireless and wired devices designed for security and automation, proudly protecting over 3.5 million users across 187 countries. With a skilled workforce of 4,100 professionals, we are committed to innovation and excellence in the security industry. We are seeking a talented, experienced, and technically adept Senior Java Developer to contribute to our dynamic team.

Ajax Systems is an innovative full-cycle organization that transforms ideas into reality, encompassing everything from research and development to mass production and sales. Our expertise spans the manufacturing of advanced physical devices—integrating a variety of sensors and hubs—developing the associated firmware, creating robust server solutions, and releasing user-friendly mobile applications. Our dedicated team collaborates in our Kyiv office, enabling us to make all technical and product decisions locally, ensuring agility and cohesiveness.We are on the lookout for an experienced Android Developer to join our dynamic team and contribute to the evolution of products we are passionate about. We seek a candidate who takes pride in their work, ensuring exceptional user experiences and high-quality development standards. This is a unique opportunity to develop applications for one of Ukraine's leading hardware companies, impacting approximately 400 million active users worldwide. Soon, you will also have the chance to spearhead the development of several new products from the ground up.

Join our dynamic team at Miratech as a Senior Full Stack Developer, where you will play a vital role in driving innovative projects utilizing both Java and Angular technologies. Your expertise will contribute to creating robust and scalable applications that enhance user experience and operational efficiency.We seek a passionate individual who is ready to take ownership of their work and excel in a collaborative environment. This is an exciting opportunity to be part of a growing company known for its commitment to professional development and technical excellence.

Ajax Systems is a pioneering international technology firm and the largest manufacturer of security systems in Europe. The company specializes in cutting-edge solutions for video surveillance, smart homes, fire detection, and flood prevention. Our extensive product portfolio features 280 innovative wireless and wired devices designed for security and automation. Currently, Ajax safeguards over 4.5 million users across 187 countries.We are seeking a highly skilled and experienced Senior Java Developer to join our dynamic accounting team at our Kyiv office. This role is perfect for a technically adept individual ready to contribute to impactful projects.

We are seeking a highly skilled Senior TypeScript/Vue.js Developer to join our dynamic team at Sigma Software Group. As part of our innovative Swedish advertising platform, you will play a crucial role in developing and enhancing our front-end applications using cutting-edge technologies. This is an excellent opportunity for professionals looking to make an impact in the world of digital advertising.

Join our innovative Game Development studio as a Senior Backend Developer specializing in .NET. We are seeking a seasoned professional who possesses a profound understanding of server architectures, real-time load handling, and cloud infrastructures. This position is ideal for an individual eager to build the backend for a new mobile game targeting Android and iOS platforms from the ground up, shaping the technological foundation of the product and making pivotal technical decisions.

About the Role Playtech is hiring a Senior Full Stack Developer for its Kyiv office. This position sits within the software development team and focuses on building and improving applications for the gaming industry. The work involves both front-end and back-end development, with a strong emphasis on delivering reliable and user-friendly products. What You Will Do Design and implement software solutions that meet business and technical requirements Enhance and maintain existing applications to improve performance and user experience Ensure smooth integration of applications across various platforms Collaborate closely with team members to deliver high-quality releases Who We’re Looking For Experience developing both front-end and back-end systems Strong attention to detail and a proactive approach to problem-solving Comfort working on complex projects in a collaborative team setting Ability to adapt and contribute in a busy development environment Location This role is based in Kyiv.

Join our dynamic team as a Senior Java Developer at Miratech in Kyiv. In this pivotal role, you will leverage your expertise in Java to design, develop, and optimize high-quality software solutions that drive our technology forward. Collaborate with cross-functional teams to create innovative applications and contribute to all phases of the development lifecycle.We are looking for passionate individuals who thrive in a collaborative environment and are eager to tackle complex challenges.

We are seeking a Senior/Lead Full-Stack Developer to enhance the technical team at Universe Group— FORMA. You will work on our web product dedicated to document processing and conversion. Your primary responsibilities will include:Designing and implementing new functional modules and integrations to enhance product capabilities.Ensuring high code quality and standardizing development approaches.Accelerating development processes and the release of new product versions.Defining and developing the product architecture, including technology selection, project structuring, and building scalable infrastructure to support a large user base.FORMA is a business of Universe Group that creates SaaS solutions for document management. Our flagship web product is PDFGuru. The team has achieved remarkable results, including:Over 4 million users monthly interact with our products.Our products offer more than 50 tools for efficient document handling.Users from over 30 countries trust our tools for their needs.Want to experience the FORMA atmosphere? Check out our video about our team—how we work, grow, and build a billion-dollar company from Ukraine.

Ajax Systems is a leading international technology company and the largest manufacturer of security systems in Europe. With over 4.5 million end-users and 330,000 PRO users across more than 180 countries, our products are trusted worldwide. Ajax provides comprehensive solutions for safeguarding residential and commercial properties of all sizes. Our product portfolio features 280 devices designed for intrusion detection, video surveillance, fire safety, and automation solutions. Each year, we experience exponential growth in both our team size and our global user base.Our System Department is dedicated to enhancing device intelligence, transforming them into fully-fledged IoT solutions. We have developed and continue to enhance the Malevich OS (a modular RTOS for various hardware platforms) and the Ajax Cloud service (Java 20 / Kotlin, AWS, Akka, NATS, Kafka, Mongo, MySQL). To facilitate system management, maintenance, and monitoring, we have created applications for iOS (Objective-C, Swift), Android (Java, Kotlin), and Windows/macOS (Python / C++, QT, QML).We are on the lookout for a Senior C++ Developer to join our AI team. In this pivotal role, you will empower our entire range of video devices to not only capture images but also to discern specific objects within the frame, track their movement and behavior, and recognize events and individuals.Your mission will involve integrating various types of computer vision analytics into our cameras, doorbells, and NVRs, taking into account the unique resource constraints of each device. You will also ensure seamless device integration with each other and with the cloud. Beyond implementing new functionalities, there will always be opportunities to enhance existing features by bringing your innovative ideas to pre- and post-processing stages.This role requires close collaboration with ML engineers, business analysts, cloud developers, and application developers, providing you with a fantastic opportunity to advance both your communication skills and technical expertise.

Become a pivotal member of our Chatbot team at Wix, where your expertise in AI technology will help revolutionize customer experiences. As a Senior AI Server Engineer, you'll be responsible for the creation of sophisticated, context-aware features that will transform our Customer Care Chatbot into an essential resource for users navigating their Wix journey. Your role will encompass the entire development cycle—from exploring cutting-edge AI methodologies to implementing scalable features that provide meaningful value to millions of users.You will:Architect, develop, and integrate advanced AI functionalities utilizing the latest LLM and NLP technologiesEngage in research and experimentation to discover innovative solutions and apply high-level models to real-world customer care challengesTake full ownership of feature development, collaborating with product teams to define requirements, estimate scope, implement solutions, and monitor performanceOptimize system performance, stability, and reliability to ensure an uninterrupted, high-quality serviceParticipate in architectural and technical discussions aimed at enhancing system design and developer experience

We are seeking a Senior/Lead Full-Stack Developer to enhance the technical team within Universe Group's FORMA division. You will play a crucial role in developing our web product within the document processing and conversion niche. Your primary responsibilities will include:Designing and implementing new functional modules and integrations to expand product capabilities.Ensuring high code quality and standardizing development approaches.Accelerating development processes and releasing new product versions.Defining and developing product architecture, including technology selection, project structuring, and building scalable infrastructure to support a large user base.FORMA is a business unit of Universe Group, which creates SaaS solutions for document management. Our flagship web product is PDFGuru. Our team has achieved remarkable results, including:Over 4 million users utilizing our products monthly.Access to more than 50 tools for effective document management.Users from over 30 countries choose our tools for their needs.Want to feel the atmosphere at FORMA? Check out our video showcasing our team—how we work, grow, and build a billion-dollar company from Ukraine.