Ciklum is looking for a Senior Full Stack Engineer to join our team full-time in Ukraine. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About the role: As a Senior Full Stack Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. The Client is a 3-month-old, seed-funded ad-tech startup building infrastructure analytics for publishers. Having successfully launched a POC with design partners, they are now transitioning from a solo-founder codebase to a founding engineering team of four. The focus is on high-seniority, autonomous developers who can thrive in a fast-paced, "startup-mode" environment without heavy management. Responsibilities: - Design, develop, and maintain scalable full-stack applications using React, Node.js - Develop the core product offering implemented to track and analyse billions of events on websites and apps - Develop integrations with Supply-Side Platforms (SSPs) and Demand-Side Platforms (DSPs) - Integrate AI/ML capabilities into our platform, including LLM APIs and on-premise model deployments - Build agentic workflows and AI-powered automation to enhance platform capabilities - Collaborate with product, data science, and engineering teams to deliver end-to-end solutions - Mentor junior developers and contribute to engineering best practices Requirements: - 5+ years of professional software development experience - Strong proficiency in JavaScript/TypeScript, React, and Node.js - Experience building high-performance, low-latency distributed systems - Strong understanding of RESTful APIs, microservices architecture, and cloud platforms (AWS/GCP) - Experience with databases (SQL and NoSQL) and data streaming technologies - Excellent problem-solving skills and ability to work autonomously - Strong communication skills and collaborative mindset What`s in it for you? - Strong community: Work alongside top professionals in a friendly, open-door environment - Growth focus: Take on large-scale projects with a global impact and expand your expertise - Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications - Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies - Flexibility: Enjoy radical flexibility – work remotely or from an office, your choice - Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations About us: At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress. As one of Ukraine’s largest IT companies and a top employer recognized by Forbes, we’ve spent over 20 years delivering meaningful tech solutions. We proudly support diverse talent and military veterans, recognizing their unique skills and perspectives they bring to shaping the future. Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn. Explore, empower, engineer with Ciklum! Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.

Ciklum is looking for a Expert Full Stack Engineer to join our team full-time in Ukraine. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About the role: As a Expert Full Stack Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. The Client is a 3-month-old, seed-funded ad-tech startup building infrastructure analytics for publishers. Having successfully launched a POC with design partners, they are now transitioning from a solo-founder codebase to a founding engineering team of four. The focus is on high-seniority, autonomous developers who can thrive in a fast-paced, "startup-mode" environment without heavy management. Responsibilities: - Design, develop, and maintain scalable full-stack applications using React, Node.js, and Python - Develop the core product offering implemented to track and analyse billions of events on websites and apps - Develop integrations with Supply-Side Platforms (SSPs) and Demand-Side Platforms (DSPs) - Integrate AI/ML capabilities into our platform, including LLM APIs and on-premise model deployments - Build agentic workflows and AI-powered automation to enhance platform capabilities - Collaborate with product, data science, and engineering teams to deliver end-to-end solutions - Mentor junior developers and contribute to engineering best practices Requirements: - 5+ years of professional software development experience - Strong proficiency in JavaScript/TypeScript, React, and Node.js - Solid experience with Python for backend development and data processing - Experience building high-performance, low-latency distributed systems - Strong understanding of RESTful APIs, microservices architecture, and cloud platforms (AWS/GCP) - Experience with databases (SQL and NoSQL) and data streaming technologies - Excellent problem-solving skills and ability to work autonomously - Strong communication skills and collaborative mindset What`s in it for you? - Strong community: Work alongside top professionals in a friendly, open-door environment - Growth focus: Take on large-scale projects with a global impact and expand your expertise - Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications - Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies - Flexibility: Enjoy radical flexibility – work remotely or from an office, your choice - Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations About us: At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress. As one of Ukraine’s largest IT companies and a top employer recognized by Forbes, we’ve spent over 20 years delivering meaningful tech solutions. We proudly support diverse talent and military veterans, recognizing their unique skills and perspectives they bring to shaping the future. Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn. Explore, empower, engineer with Ciklum! Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.

• Leading the Core Tech team to deliver reliable, high-quality engine systems, tools, and frameworks that support our creative and technical goals. • Owning technical direction and execution for core engine work in Unreal Engine 5. • Contributing directly to engineering efforts, providing hands-on implementation, architectural guidance, and problem-solving where it adds the most impact. • Driving predictability and clarity by partnering with the Project Engineering Lead and production to plan work, manage priorities, and proactively address risks. • Supporting and growing engineers through mentoring, feedback, and clear expectations. • Championing performance and technical health across platforms, ensuring systems meet performance targets and scale with the needs of the project.

Ciklum is looking for a .NET Engineer to join our team full-time in Ukraine. We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About the role: As a .NET Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. We are seeking a .NET Engineer with experience or interest in data engineering. This role focuses on contributing to scalable data solutions using C# as the primary language. The ideal candidate is a proactive problem-solver who can work both independently on assigned tasks and collaboratively within the team. Responsibilities: - Contribute to the development and implementation of scalable, high-performance solutions - Integrate external datasets and support the development of data pipelines - Develop and maintain back-end systems using C# - Follow established coding standards and source control practices (Git, branching strategies) - Collaborate with global R&D and software teams to ensure smooth integration and delivery - Troubleshoot software and infrastructure issues with guidance when needed - Work closely with project managers to track tasks and support timely delivery - Document technical solutions and implementation approaches - Continuously improve technical skills and stay up to date with relevant technologies Requirements: - 3 years of professional experience with .NET and C# - Ability to understand and work with existing systems and codebases - Good debugging and troubleshooting skills - Solid understanding of object-oriented programming principles - Experience with relational databases such as SQL Server - Basic understanding of RESTful services and APIs - Experience with version control systems such as Git - Strong problem-solving and analytical skills - Ability to work independently on tasks while collaborating with the team Desirable: - Experience with data processing or data pipelines - Familiarity with cloud platforms or DevOps practices What`s in it for you? - Strong community: Work alongside top professionals in a friendly, open-door environment - Growth focus: Take on large-scale projects with a global impact and expand your expertise - Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications - Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies - Flexibility: Enjoy radical flexibility – work remotely or from an office, your choice - Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations About us: At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress. As one of Ukraine’s largest IT companies and a top employer recognized by Forbes, we’ve spent over 20 years delivering meaningful tech solutions. We proudly support diverse talent and military veterans, recognizing their unique skills and perspectives they bring to shaping the future. Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn. Explore, empower, engineer with Ciklum! Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.