Software Engineer at AppsFlyer | Kyiv

At AppsFlyer, we place data at the core of our operations, processing over 150 billion events daily, and we’re rapidly expanding. Our dedicated team builds the essential frameworks that support this growth. Unlike conventional Data Engineering teams, we function as a Software Development team, creating internal services and tools for Data Engineers and other…

Role overview Wix.com Ltd. seeks an AI-Native Software Engineer for its Kyiv office. The position centers on building and refining AI technologies that power the Wix platform and serve a global audience. What you will do Build and integrate AI-driven features within Wix products Collaborate with engineers and specialists to deliver reliable solutions Take part in projects that shape the future of web development at Wix Team and culture Work alongside experienced professionals who value practical problem-solving and new ideas. The team supports open communication and shared learning to strengthen both the platform and each member’s skills.

Join Kostal Group as a Mechanical Design Engineer and become a pivotal part of our innovative R&D team in Kyiv. In this role, you will leverage your expertise in mechanical engineering design to develop cutting-edge solutions that drive our projects forward. Collaborate with cross-functional teams to create efficient designs and ensure project success.

Join Kyivstar.Tech as an Engineering Manager, leading development processes and driving product innovation. Collaborate with teams to create efficient solutions while maintaining high-quality engineering standards. Your leadership will empower teams to achieve technological excellence and foster an environment of growth and creativity.

Quantum Systems is at the forefront of developing next-generation unmanned solutions that operate seamlessly across air, land, and sea. Our advanced aerial drones, underwater vehicles, and ground platforms integrate state-of-the-art hardware with AI-driven software, providing unparalleled control and real-time data insights. We are trusted by defense, security, and public sector clients around the globe, continually redefining mission versatility and performance.Since 2022, Quantum-Systems has proudly supported Ukraine with our local office in Kyiv.As a Hardware and Electronics Engineer, you will be an integral member of our hardware development team, spearheading the design and development of sophisticated electronic circuits. You will have the opportunity to collaborate with our world-class team and contribute significantly to the advancement of embedded electronics and power systems.This position is a full-time office role, and candidates must be based in Kyiv.

Join us at our Kyiv office as a full-time Flight Control Systems Engineer, where you will engage in an exciting journey towards the future of drone technology. Our shuttle service from the nearest metro station ensures your commute is hassle-free.About the RoleAs an integral member of our Flight Controls team, you will tackle some of the most fascinating challenges in flight guidance, dynamics, and control systems. Collaborating closely with a dynamic group of four experts, you will be at the forefront of pushing the boundaries of drone technology.Your role will involve working alongside stakeholders from navigation, embedded systems, and flight test departments to design, implement, and validate cutting-edge flight guidance and control algorithms, contributing significantly to the mission of Quantum-Systems.Your Daily Responsibilities:Develop and code flight guidance and control algorithms for both automatic and autonomous flight systems.Assist in creating models for flight dynamics and designing control and feedback mechanisms based on these models.Prepare and conduct flight tests with UAS systems.Analyze flight data and evaluate test results comprehensively.Generate C/C++ code using Matlab Simulink and integrate it into the flight control systems and autopilot frameworks.Support product certification and obtain necessary flight permits, such as those for BVLOS flight projects.Contribute to the enhancement of our product development processes.

Join us at Superhuman, where we embrace a vibrant hybrid work model that balances focused individual work with collaborative in-person sessions. This unique approach cultivates trust, sparks innovation, and strengthens our team culture.About SuperhumanSuperhuman, the parent company of Grammarly, is an AI-driven productivity platform dedicated to unlocking everyone's superhuman potential. We integrate AI seamlessly into the tools people already use, connecting with over 1 million applications and websites. Our product suite includes Grammarly's writing assistance, Coda's collaborative workspaces, Mail's inbox management, and Go, our proactive AI assistant that understands context and provides automatic help. Since our founding in 2009, Superhuman has empowered over 40 million users across 50,000 organizations and 3,000 educational institutions worldwide, helping them eliminate busywork and concentrate on what truly matters. Discover more at superhuman.com and explore our values here.The OpportunityTo meet our ambitious objectives, we are seeking talented Full-Stack Software Engineers to be a part of our engineering teams.As an engineer at Superhuman, you will have the freedom to innovate and drive breakthroughs that will influence our product roadmap. Our technical challenges are evolving rapidly as we scale our interfaces, algorithms, and infrastructure. For more insights, check out our technical blog.In this role, you will take on a pivotal position in enhancing user acquisition and conversion. You will develop innovative features and infrastructure that highlight our product's value, encouraging millions of users to make Superhuman their indispensable writing companion. We welcome you to share your knowledge, experiences, and aspirations with us to ensure the best fit for our team. What is your superpower?Your responsibilities will include:Commencing code development and deployment in your first week, delivering impactful features within your initial months.Building and maintaining production services with high activity on the back-end while crafting rich user interfaces on the front-end.Aiming for high availability for both consumer and enterprise customers.Gaining expertise in infrastructure as code (IaC).Collaborating with internal teams such as Core, Enterprise, Trust, and Data to create delightful user experiences.

Quantum Systems is at the forefront of developing next-generation unmanned solutions across air, land, and sea. Our innovative aerial drones and advanced underwater and ground platforms merge state-of-the-art hardware with AI-driven software to provide seamless control and real-time data insights. Serving clients in defense, security, and the public sector globally, we are reshaping mission versatility and performance.Since establishing our local office in Ukraine in 2022, Quantum-Systems has been a strong supporter of the country. We are currently seeking a Design Engineer to join our dynamic R&D team to help create the next generation of unmanned aerial vehicles (UAVs). In this role, you will participate in the entire design process—from concept development to product realization—working on cutting-edge technologies and collaborating with cross-functional teams.If you are passionate about transforming innovative ideas into high-tech products, detail-oriented, and thrive in a collaborative environment, we invite you to contribute to advancements in aerospace and UAV technology.This is a full-time, office-based position located in Kyiv.

Join the Ajax Systems Team! We are a leading international technology company and the largest developer and manufacturer of security systems in Europe, specializing in smart home capabilities. Our ecosystem encompasses 135 devices, mobile and desktop applications, and robust server infrastructure. We have consistently demonstrated exponential growth in team size and global user base, with over 3,300 employees protecting 2.5 million users across more than 187 countries.About the Device Department Our dedicated Device Department focuses on developing innovative devices for security and automation. We embrace significant challenges in the following areas: - Low-Power: Devices must operate efficiently for extended periods on standard batteries; - Cost Efficiency: Our mass-market products should remain competitively priced; - Design for Manufacturing (DFM) and Design for Humans (DFH): Our schematics, enclosures, and components should be easily replicable in high volumes without compromising quality. Our development primarily utilizes STM32 microcontrollers, along with other MCUs and SoCs, employing Embedded C. We have cultivated a talented team of Hardware and Embedded C engineers, industrial designers, and mechanical engineers.

Role overview N-iX is seeking a Mid-Level Big Data Engineer located in Ukraine. This role centers on building and maintaining data pipelines, Ontology Objects, and Foundry Functions within the Palantir Foundry platform. Collaboration with colleagues from various teams is a key part of the position, with the goal of delivering data solutions that inform decision-making throughout the company. What you will do Design, develop, and maintain advanced data pipelines Work with Ontology Objects and Foundry Functions in Palantir Foundry Collaborate with stakeholders from different teams to deliver scalable, reliable, and secure data solutions Requirements Experience working with cloud-based data engineering Understanding of modern data architectures Interest in tackling complex data challenges, particularly in regulated and data-heavy environments

Join our dynamic team in Kyiv, Ukraine, where you will work full-time in our modern office. We provide a convenient shuttle service from the nearest metro station for your ease.About the RoleAs a Senior Embedded Software Engineer, you'll play a pivotal role within our Architecture team, focusing on the development and implementation of essential features that enable our drones to operate safely and autonomously in the skies. Collaborating with our elite team of seven members, you'll push the boundaries of drone technology while working closely with stakeholders in Germany and the US across System Architecture and Hardware Development.Your Daily Responsibilities:Develop, maintain, and optimize the Quantum-Systems autopilot firmware and its associated stack.Design, conceptualize, implement, and test new autopilot functionalities.Export flight control and navigation algorithms from MATLAB/Simulink and integrate them into the autopilot's embedded framework.Implement, maintain, and optimize BSP/peripheral and external sensor drivers for real-time operating systems.Document and maintain autopilot firmware for flight tests, including creating flight test tickets, supporting flight tests, and analyzing post-flight data.Create unit tests and debug/troubleshoot the codebase to ensure comprehensive code coverage and functionality testing.Oversee the firmware update ecosystem, including bootloaders and firmware updates.Assist in the implementation and maintenance of production tools.

Join our dynamic team as an experienced LLM Research Engineer specializing in Natural Language Processing (NLP). We are passionate about advancing the capabilities of large language models (LLMs) and are looking for a talented individual who shares our enthusiasm for innovative AI research. In this role, you will be responsible for designing and prototyping sophisticated data preparation pipelines, collaborating with data engineers to transition your prototypes into scalable, production-ready systems. You will also create and implement a cutting-edge evaluation and benchmarking framework to assess and enhance model quality, as well as manage comprehensive end-to-end training processes for LLMs. Work alongside leading AI researchers and engineers to ensure our models not only deliver exceptional performance but are also aligned with user requirements, cultural contexts, and ethical considerations.About UsKyivstar.Tech, a prominent Ukrainian IT company and a proud resident of Diia.City, is a subsidiary of Kyivstar, one of Ukraine’s foremost telecom operators. Our mission is to transform lives in Ukraine and globally by developing technological solutions and products that unlock the potential of businesses while addressing the needs of users. Our diverse team of over 500 specialists is dedicated to delivering high-quality mobile and web solutions, as well as providing design, development, support, and technical maintenance for high-performance systems and services. We thrive on innovation and are committed to challenging traditional methodologies. Our entrepreneurial culture drives us to continuously evolve and create groundbreaking solutions.

Role overview Miratech is hiring a Senior Network Engineer/Analyst in Kyiv. This role focuses on designing, implementing, and maintaining network infrastructures. The position sits within the engineering department and collaborates with teams across the company to support reliable network operations and strong performance.

Our Mission and VisionAt Solidgate, we are driven by a clear mission: to empower exceptional entrepreneurs in building outstanding internet companies. We strive to support the innovators who are shaping the digital economy by providing them with the financial infrastructure they need. Our ambitious goal is to establish ourselves as the world's leading payments orchestration platform.About the Team and RoleAs a member of the Billing team, you will take charge of the Taxes module, a vital component of our billing system responsible for tax calculations and reporting across various jurisdictions.The product has surpassed the MVP stage and is currently in active use by our customers. With the foundational logic established and a high demand for our services, your focus will be on scaling both functionality and reliability.This position is particularly exciting as you will not be maintaining legacy code; instead, you will be building and shaping a critical system almost from the ground up. You will have a clear path to leadership, overseeing the direction of the Taxes module, making architectural decisions, and expanding your team.Your team will consist of a Product Owner, one Senior Engineer, an Automation QA, and a Tax Manager.Discover our technology stack here.What You Will OwnYou will focus on:Developing tax calculation and reporting logicIntegrating third-party tax providersEnhancing system resilience and uptimeMaking architectural decisions and setting technical directionMentoring engineers as the team growsIn the initial months, your efforts will be directed towards delivering essential tax functionalities and establishing a robust foundation for future product and team expansion.We prioritize automated testing over manual QA—unit, integration, functional, and end-to-end tests are integral to our shipping and scaling processes.You Are a Great Fit If You Have4+ years of backend engineering experience1.5+ years of commercial experience in Go developmentA strong understanding of high-load system designSolid experience with PostgreSQLExperience with cloud technologies and microservices architecture

About the RoleWe are seeking a motivated and skilled Telecommunications Engineer of Category 2 to join our dynamic team in Kyiv. In this role, you will play a crucial part in ensuring the efficient operation and maintenance of our telecommunications systems, contributing to the quality of service provided to our customers.Key ResponsibilitiesDesign, implement, and maintain telecommunications networks.Collaborate with cross-functional teams to resolve technical issues.Monitor network performance and suggest improvements.Ensure compliance with industry standards and regulations.

Join our dynamic team as a Senior Data Engineer in the AdTech unit, where you will drive innovation and enhance data-driven decision-making processes. You will work collaboratively with cross-functional teams to develop robust data pipelines and optimize data architectures.

SKELAR is a venture builder dedicated to creating international product IT companies using the principles of venture investment. Together with our co-founders, we assemble strong teams to launch tech businesses and excel in global markets.Currently, SKELAR boasts a portfolio of diverse businesses spanning various niches—from EdTech to marketplaces. Our companies consistently rank among the top startups and product firms in Ukraine, achieving high placements in the App Store and developing platforms utilized by millions globally. Moreover, our ventures have been featured in prominent media outlets like TechCrunch and Wired.We are on the lookout for a proactive and responsible Security Engineer to elevate our company's security framework. With over 2000 users and 1000+ devices at SKELAR, our goal is to establish robust processes ranging from system hardening and automation (Zero Trust) to building our internal Security Operations Center (SOC) from the ground up.We welcome applications from talented engineers with expertise in either Infrastructure & Endpoint Security or Detection & Response. If you possess a solid foundation in security practices and have experience with systems similar to ours, we would love to connect!Your Challenges Await:Area 1: Cloud & Endpoint Security (Prevention & Hardening)- Conduct security reviews and harden our key corporate services: Google Workspace (GWS), Slack, Notion, Dropbox;- Engage deeply in Identity & Access Management: architecting a Zero Trust framework, configuring MFA, SSO, and Lifecycle management exclusively based on Okta;- Manage macOS systems and ensure compliance through Jamf Pro and Jamf Protect;- Develop and implement data loss prevention (DLP) policies within our ecosystem.Area 2: SecOps & Monitoring (Detection & Response)- Select and fully implement an internal SIEM solution: conducting POCs for monitoring systems and safeguarding architectural choices for the business;- Configure log collection and correlation from our cloud environments, SaaS services (GWS), and networks;- Design anomaly detection rules (Detection Engineering) and create response Playbooks;- Build processes for alert handling and incident management from the ground up.What We Value:- Experience in information security (infrastructure protection);...

Quantum-Systems is at the forefront of developing next-generation unmanned systems for aerial, land, and maritime applications. From advanced aerial drones to underwater and ground platforms, our systems integrate cutting-edge hardware with AI-driven software, delivering seamless control and real-time data analytics. Trusted by clients in defense, security, and the public sector globally, we are redefining versatility and mission execution efficiency.Quantum-Systems is a committed partner to Ukraine, with a local office established in 2022.We are currently seeking a Test Engineer to ensure the operational effectiveness of our equipment, identifying defects and maintaining quality control prior to release or further repair. This is a vital role that guarantees the reliability of our technology.This position is full-time and office-based. Candidates must be located in Kyiv.Your Daily Mission:Conduct functional testing of equipment within defined parameters.Maintain comprehensive logs throughout the testing process.Identify, describe, and classify discrepancies.Verify devices post-repair or component replacement.Test modules: power supplies, network interfaces, sensors, buttons, and ports.Work with diagnostic software and measuring tools.Conduct load and stress tests as required.Collaborate with service engineers to clarify defects and facilitate equipment repairs.Adhere to internal testing and quality standards.

Join our team in Kyiv as a System Engineer Navigation and be part of a groundbreaking journey in UAV navigation technology. This role requires full-time presence in our office, conveniently serviced by a shuttle from the nearest metro station.About the PositionAs a System Engineer Navigation, you will play a pivotal role in shaping the future of unmanned aerial vehicle navigation systems. Your work will span both hardware and software domains, focusing on the integration of cutting-edge sensors, the development of advanced navigation algorithms, and enhancing flight control performance. If you have a passion for UAV technology and enjoy collaborating across functions to innovate navigation and guidance systems, we want to hear from you!Your Daily Responsibilities:Facilitate communication between customer support and R&D, prioritizing feature requests and managing bug reports.Gather, analyze, and assess preliminary data to inform hardware updates.Collaborate effectively with cross-functional teams.Participate in design reviews and contribute to system documentation.Analyze and integrate new sensors, focusing on flight control-related components like IMU, GNSS, magnetometers, and pressure sensors.Develop integration and validation concepts.Design, implement, and test algorithms for navigation and control systems that meet project specifications.Conduct simulations and analyses to validate GNC models and assess system performance under various conditions.Enhance system performance through innovative sensor calibration techniques.

Quantum Systems specializes in innovative unmanned solutions for aerial, terrestrial, and maritime applications. Our advanced drones and platforms integrate state-of-the-art hardware with AI-enhanced software, delivering seamless control and real-time insights. Trusted globally by defense, security, and public sector clients, we are at the forefront of redefining operational versatility and performance.Since 2022, Quantum-Systems has proudly maintained a local office in Ukraine, demonstrating our commitment to the region.We are seeking a Design Engineer (specializing in serial production equipment) to join our dynamic production engineering team. In this role, you will design and refine tooling and fixtures for composite manufacturing processes. Your contributions will span the entire product lifecycle—from initial concept through to execution—while collaborating closely with R&D, technologists, and production teams.This position is ideal for those who are passionate about transforming concepts into high-tech solutions, exhibit strong attention to detail, and thrive in a collaborative environment. Join us in advancing innovations within aerospace and composite technologies.This is a full-time, office-based role. Candidates must be located in Kyiv.