Senior Data Engineer in AdTech Sector

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

SKELAR is a Ukrainian venture builder committed to creating international tech companies under the principles of venture investments. Together with co-founders, we assemble strong teams to launch product-oriented IT businesses and succeed in global markets. Our portfolio includes over 10 successful B2C businesses featured in outlets like TechCrunch and Wired.PawChamp is a global IT product that helps dog owners build harmonious relationships with their pets through training and expert support. In 2025, we were named “Product of the Day” on Product Hunt, achieved a 4.8 rating on the App Store, and expanded into 8+ global markets.PawChamp is developing its own A-class MarTech infrastructure and is searching for a Senior Golang Engineer to be its technical cornerstone. Your primary focus will be on designing and building an internal funnel builder: a platform that allows marketers to configure quiz funnels and launch A/B tests and new markets independently from developers. Additionally, you will work on integrations with advertising platforms, analytical pipelines, and marketing process automation.As the team is just being formed, you will have a significant influence on architecture, processes, and approaches from day one, with direct communication with stakeholders and no micromanagement.Technology Stack:Backend: GolangDatabases: PostgreSQLInfrastructure: GCP, Docker, Kubernetes, GitHub ActionsYour Responsibilities:Design and build the funnel builder tool enabling internal teams to manage funnels without developer involvement;Implement AI solutions for automating business and engineering processes;Ensure production system reliability: monitoring, alerts, CI/CD, and test coverage;Participate in architecture formation — your input will impact technical decisions from day one;Collaborate closely with stakeholders and marketing teams, understanding the business context to find optimal technical solutions for real tasks.

Join SKELAR, a pioneering venture builder committed to establishing international tech businesses. We partner with co-founders to assemble strong teams that excel in global markets.Currently, SKELAR manages a diverse portfolio of businesses across various sectors, from EdTech to marketplaces. Our ventures have been recognized as top startups and product companies in Ukraine, featuring prominently in AppStore rankings and creating platforms used by millions. Notable media outlets like TechCrunch and Wired have covered our businesses.We take pride in our robust team of over 1,000 specialists, each possessing exceptional expertise and ambitious goals. Our people are our greatest asset, and we strive to build businesses alongside the best talent available.We are currently seeking a Golang Backend Team Lead for PawChamp, a mobile application and online platform designed for dog owners. PawChamp enables pet parents to train their dogs and learn more about care and training through 24/7 chats with experts, the AI companion Pawchie, and educational materials developed in collaboration with dog trainers. Our aim is to provide personalized daily lessons covering all aspects of dog training, from basic commands to addressing behavioral issues. Our strategic goal is to become the leading player in the global online dog training market, fulfilling all needs of pet parents and their dogs beyond training.In October 2025, we earned the title of Product of the Day on Product Hunt.App Store rating: 4.8Intro video about the product: https://www.youtube.com/watch?v=D3vURwhmufgKey Challenges:Enhancing the backend for our mobile products and the PawChamp web platform.Leading, coordinating, and developing the backend development team.Collaborating with stakeholders.Ensuring high code quality and adherence to best development practices within the team.Interacting with adjacent teams to improve system component interaction and optimize processes.Enhancing code, architecture, services, and development approaches.What We Value:

Hello!We are on the lookout for a talented Junior/Middle Software Engineer specializing in Go to join Guru Apps (part of Universe Group) – a thriving iOS ecosystem with over 100 million downloads across 186 countries (including Cleaner Guru, Scan Guru, and Visify) and an impressive average rating of 4.6 on the App Store.This is an opportunity focused on progressive development, as nearly all new backend services and products within our ecosystem are launched using Go, featuring high-load capabilities in production, complex business logic, and direct impact on a million-strong audience.You’ll fit right in if you’re eager to:Develop new backend services in Go for products with a global audience while working on Core systems that serve all ecosystem products.Design high-load solutions and witness their real-world performance in production— from initial release to scaling under millions of loads.Take full engineering ownership – from architectural decisions to releases, stability, and ongoing service evolution.Enhance your technical expertise by working with high-load architectures and modern tech stacks (Go, Kubernetes, AWS, Prometheus, OTEL), integrating cutting-edge approaches in backend development.Make a tangible impact on the product – we value engineering insights and technical suggestions, with your contributions directly reflected in products that reach millions.Collaborate within an ambitious team of like-minded peers who don’t just write code but build scalable solutions, sharing knowledge and best practices across the Universe Group.Thrive in a fast-paced decision-making environment – minimal bureaucracy, extensive collaboration, and real influence without lengthy approvals.Challenges you will tackle with your future colleagues:Development of analytical and marketing platforms, which form the basis of user attribution, event processing, and product and business decision-making...

Quantum Systems GmbH develops unmanned solutions for air, land, and sea operations, combining advanced hardware with AI-driven software. The company delivers real-time data and precise control to defense, security, and public sector clients worldwide. Since establishing the Kyiv office in 2022, Quantum Systems has remained committed to supporting Ukraine. Role overview The Service Team Lead manages the Kyiv-based service team, focusing on high-quality repairs, process improvements, and the professional growth of engineers. This is a full-time, on-site position based in Kyiv. Main responsibilities Team leadership Direct and coordinate a team of service engineers and testers. Plan workloads, assign tasks, and set priorities to improve productivity. Mentor, onboard, and guide engineers in their development. Lead technical discussions and review complex cases to find solutions. Quality assurance Ensure all repairs and testing meet company standards. Monitor deadlines, SLAs, and overall service quality. Analyze recurring technical issues and drive improvements to reduce defects. Review and validate complex repairs involving electronics, UAVs, and modules. Process improvement Streamline workflows and introduce industry best practices. Maintain and update checklists, procedures, and technical documentation. Collaborate with Testing, Logistics, Procurement, and R&D teams. Track performance metrics and prepare reports on key KPIs. Technical involvement Help resolve complex engineering challenges as they arise. Make technical decisions in non-routine situations. Oversee repairs of UAVs, electronic modules, and power systems. Location: This position requires full-time, on-site presence at the Kyiv office.

Join our dynamic team at Auto1 as a Team Lead Java Engineer in our Remarketing department. In this role, you will lead a talented group of engineers, driving innovation and excellence in our technology solutions. You will be responsible for overseeing the development and implementation of robust Java applications that enhance our remarketing strategies. Your leadership will be crucial in mentoring team members, improving coding standards, and ensuring high-quality deliverables.

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.

Join our dynamic Data Team at Wix as a DevOps Engineer, where you will play a pivotal role in optimizing our infrastructure and enhancing our data processing capabilities. You will collaborate with cross-functional teams to improve deployment automation, maintain system reliability, and ensure the scalability of our services.

Ajax Systems is a leading international technology firm and the largest manufacturer of security systems in Europe. With over 4.5 million end-users and 330,000 professional users across more than 180 countries, our Ajax products provide comprehensive solutions for safeguarding residential and commercial properties of all sizes.Our portfolio includes 280 devices designed for intrusion protection, video surveillance, fire safety, and automation solutions. Each year, we showcase significant growth in both our team size and user base worldwide.Ajax Systems operates a complete production cycle, from ideation and prototyping to mass manufacturing and global sales. Each department plays a critical role in meeting the operational needs of our business. Our professionals are engaged at every stage, from the production line in Ukraine to the logistics center in Poland, from where our products are shipped to distributors around the globe.As the Senior Data Engineer Team Lead, you will be responsible for the strategic design, development, and management of complex data processing solutions within an enterprise environment. Your primary goal will be to ensure reliable, secure, and scalable data for analytics, machine learning, and business applications.

Role Overview Miratech is looking for a Senior Data Engineer in Kyiv. This role focuses on designing, building, and maintaining scalable data architectures that support business growth. The position involves working closely with teams across the company to deliver reliable data solutions. What You Will Do Design and develop data architectures that can scale with business needs Build and maintain data processing pipelines Work with cross-functional teams to deliver data solutions that support business insights Optimize data workflows for performance and reliability Ensure data integrity throughout all processes

Ajax Systems is a leading international technology company and the largest developer and manufacturer of security systems in Europe, specializing in Ajax with smart home capabilities. Our ecosystem comprises 135 devices, user-friendly mobile and desktop applications, and robust server infrastructure.Each year, we experience exponential growth in both our team size and global user base. Currently, we employ over 3,300 individuals, with Ajax sensors protecting 2.5 million users across more than 187 countries around the globe. Our company is in a state of dynamic expansion, continuously seeking proactive and talented individuals to join our growing ranks.We are the Pre-Sales Engineering team at Ajax Systems, operating at the intersection of technology, sales, and innovation. Our role extends beyond mere support for sales; we empower partners to integrate cutting-edge security systems into their operations, transforming their understanding of security solutions.

Role overview Miratech is seeking a Senior DevOps Engineer based in Kyiv. This position centers on designing, building, and refining cloud infrastructure. The role involves integrating and deploying applications to support smooth, reliable delivery. What you will do Create and enhance cloud infrastructure to meet business requirements Implement and maintain continuous integration and continuous deployment (CI/CD) pipelines Collaborate with engineering, QA, and product teams to streamline deployment processes Optimize systems for stability, scalability, and efficiency Requirements Proven experience building and managing cloud infrastructure Familiarity with CI/CD tools and workflows Strong collaboration skills and an interest in solving technical challenges with others Proactive mindset and ability to adapt to shifting priorities

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.

Role Overview auto1 is hiring a Senior Java Engineer in Kyiv. This role focuses on building and improving Java applications that support our clients' needs. The team values collaboration and technical skill, and works together to deliver reliable software. What You Will Do Develop and maintain Java-based applications as part of a skilled engineering team Mentor junior developers and support their technical growth Contribute to architectural discussions and technical decisions Help ensure software products meet quality standards before release What We Look For Strong experience with Java development Ability to work well in a team and share knowledge with others Interest in shaping technical solutions and making architectural choices Experience mentoring or guiding less experienced engineers is a plus Location This position is based in Kyiv.

Design, develop, deploy, and manage over 130 modules and multiple applications daily.Enhance your skills by taking a hands-on approach to tackle complex challenges.Elevate standards and spearhead technological advancements to ensure AUTO1 remains at the forefront of innovation.Collaborate closely with diverse product and development teams to bring new, cutting-edge features to fruition. You will have opportunities to explore various technologies and areas of software development.

Playtech is looking for a DevOps Team Leader to join the Kyiv office. This role leads a group of DevOps engineers with a focus on refining software development workflows and improving application reliability. The position centers on optimizing deployment pipelines and supporting teams as they deliver new features and updates. Responsibilities Lead and mentor a team of DevOps engineers Guide the team in adopting modern DevOps practices Work to streamline software development and deployment processes Maintain high availability and performance for Playtech applications Collaborate with teams across departments to enhance product quality What We’re Looking For The ideal candidate enjoys working with technology and knows how to motivate a team toward operational goals. Strong technical skills and leadership experience are important, along with the ability to work on projects that involve several departments.

Join our dynamic team at Miratech as a Senior Network Automation Engineer, where you will play a pivotal role in enhancing our network infrastructure through automation. We are looking for a talented professional who is passionate about technology and eager to implement innovative solutions. Your expertise will drive efficiency and improve network reliability.

Playtech is looking for a DevOps Team Leader to join the Kyiv office. This position centers on guiding a skilled DevOps team and improving the integration and deployment of software solutions. Role overview The DevOps Team Leader manages daily operations, supports team growth, and works to strengthen infrastructure. Collaboration with other departments is a key part of the job, with a focus on refining workflows and introducing effective DevOps practices. What you will do Lead and mentor a team of DevOps engineers Drive integration and deployment processes for Playtech’s software Work closely with other teams to streamline workflows Promote a culture of innovation and continuous improvement Requirements Experience in DevOps or a related technical field Strong leadership skills Interest in optimizing processes and supporting team development

Role overview ajax seeks a Head of Project Team based in Kyiv. This leadership position manages the planning, execution, and delivery of projects that drive the company's vision forward. The Head of Project Team guides project groups, aligns work with strategic goals, and upholds high standards at every stage. What you will do Supervise and mentor project managers Lead project planning and execution for several teams Ensure projects achieve company objectives and stay on schedule Encourage clear communication and teamwork among project members Review and improve project management methods Implement and maintain practices that increase productivity and quality Requirements Experience managing project teams and complex projects Strong communication abilities Skill in fostering collaboration and mentoring colleagues Proven background in project management