Senior Full Stack Engineer at Simulmedia | Lviv, Kyiv

Join Simulmedia as a Senior Full Stack Engineer and play a vital role in enhancing our engineering team as we expand our platform and introduce cutting-edge insights and analytics features within our innovative products. Our technical roadmap emphasizes platform unification, presenting the exciting opportunity to modernize our existing enterprise product into a cohesive, state-of-the-art technology stack. This role, featuring a focused 30/70 backend-to-frontend allocation, requires close collaboration with product managers, designers, and data engineers to ensure the seamless incorporation of analytics functionalities into our platform. Your ability to quickly iterate and deliver high-quality features that you own from start to finish will be essential. Location: Candidates must be based in Ukraine. Our offices are located in Kyiv and Lviv, and our teams primarily work remotely, with occasional in-person meetings.

Join Simulmedia, a pioneering company in data-driven advertising, where we leverage cutting-edge analytics and machine learning to enhance ad placements and campaign efficiency. Our goal is to transform the advertising landscape, empowering brands to connect with their audiences more effectively.Job Overview:We are on the lookout for a passionate and skilled Senior Data Scientist to become an integral part of our innovative team. The ideal candidate will possess extensive knowledge in supervised learning, reinforcement learning, and optimization methodologies. You will be instrumental in crafting and deploying sophisticated machine learning models, generating actionable insights, and refining our advertising strategies.This position is based in Ukraine, with a primarily remote work setup and occasional in-person meetings in our offices located in Kyiv or Lviv.Core Responsibilities:● Develop and implement state-of-the-art supervised and reinforcement learning models to enhance ad targeting and boost campaign outcomes.● Collaborate with interdisciplinary teams to pinpoint opportunities for applying machine learning and optimization strategies to address business challenges.● Engage in comprehensive data analysis and feature engineering to prepare datasets for machine learning endeavors.● Utilize optimization algorithms to maximize the impact and efficiency of advertising campaigns.● Assess and enhance existing models to improve their accuracy, efficiency, and scalability.● Leverage statistical methods and machine learning techniques to analyze large, complex datasets.● Effectively communicate findings and recommendations to both technical and non-technical audiences.● Stay abreast of the latest developments in machine learning, reinforcement learning, and optimization practices.● Collaborate with engineering teams to integrate models into production systems.

Simulmedia is seeking a dynamic and experienced Vice President of Engineering to lead our engineering team in developing innovative solutions that drive our business forward. As a VP of Engineering, you will be responsible for overseeing all technical aspects of the company, ensuring the delivery of high-quality products, and fostering a culture of excellence and continuous improvement within the team.Your role will involve collaborating with cross-functional teams, setting strategic direction, and mentoring engineering leaders to enhance their skills and effectiveness. Join us in our mission to revolutionize the advertising industry through cutting-edge technology.

Join SKELAR, a pioneering Ukrainian venture builder that is shaping the future of tech businesses on a global scale. We collaborate with co-founders to assemble formidable teams that excel in international markets.Currently, SKELAR operates multiple businesses across various sectors, from EdTech to marketplaces. Our companies consistently rank among Ukraine's top startups and product firms, frequently appearing in prestigious publications like TechCrunch and Wired.With a robust team of over 1,000 professionals, we pride ourselves on our exceptional expertise and ambitious goals. Our talent is our most valuable asset, and we strive to build our businesses alongside the best in the industry.We are excited to invite applications for the role of Senior Product Engineer (AI-Native Full-Stack) within our R&D Department.At Brighterly, we are redefining online education for children by creating an ecosystem that serves as the ultimate destination for learning mathematics. Our mission is to develop the next EdTech unicorn in a market valued at $130 billion.Technology stack: https://skelar-tech.github.io/Brighterly/Key challenges include:Rapid Prototyping: Build functional MVPs (Web & Mobile) from scratch within short sprints.AI Integration: Implement LLM, agent architectures, and RAG systems into our products.Fullstack Delivery: Independently develop features from database schema to final animations on the frontend.Cross-platform Experimentation: Create mobile applications using AI tools on Flutter/React Native to validate market hypotheses.Architecture for Speed: Design flexible architecture that allows for rapid shifts in development direction without pain points.What we value:Senior Level Mindset: You understand how scalable systems are built, even those generated by AI.AI-Fluency: Familiarity with tools like Claude, Cursor, Windsurf, and v0.dev is essential.

Join Simulmedia as a dynamic and strategic leader in digital transformation, committed to enhancing and scaling the operational framework of PlayerWON, our innovative advertising platform designed for free-to-play games. PlayerWON facilitates rewarded video advertising within premium PC and console games, and we are poised to revolutionize our internal tools, partner onboarding processes, and campaign management to fuel our next growth trajectory.In this pivotal role, you will shape the vision, strategy, and implementation roadmap for our media buying and operational processes related to PlayerWON, collaborating closely with leaders across Gaming Partnerships, Ad Operations, Product, Engineering, and Client Success.If you have a passion for the intersection of gaming, advertising, and operational excellence, this is your chance to lead one of the most transformative initiatives in the gaming media landscape.

Role Overview Miratech is looking for a Senior Full Stack Developer in Lviv to join the engineering team. This role focuses on building web applications using Java and Angular. Collaboration with colleagues across different functions is a key part of delivering software that meets client requirements. What You Will Do Develop and maintain web applications with Java for backend and Angular for frontend Work closely with team members from various disciplines to deliver reliable solutions Contribute to technical discussions and help shape project direction Who We’re Looking For Strong experience with both Java and Angular Enjoys solving problems and learning new technologies Comfortable working on complex projects Ready to adapt and collaborate in a team setting

Join Simulmedia as a Lead AI Engineer and play a pivotal role in shaping the future of our Agentic Products & Platform. You will lead a team of talented engineers to design, develop, and implement advanced AI solutions that enhance our product offerings and drive innovation. Your expertise will be critical in solving complex problems and delivering exceptional results.

Welcome to Liven! We are crafting a global ecosystem of self-regulation products that empower individuals to disengage from emotional autopilot and cultivate better relationships with themselves.Within our ecosystem, we offer:Self-discovery Companion — an app chosen by over 2.5 million users. It provides a space for self-exploration through AI coaching, mood tracking, audio practices, and bite-sized learning.Online Coaching — sessions with certified experts to navigate complex situations.Supplements — for physical recovery and body support.We are on a continuous expedition with ambitious plans to expand our ecosystem.Liven is a company for the curious. We are driven by curiosity — an intrinsic need to ask questions, dig deeper, and not shy away from the unknown challenges.Our passion lies in creating products and solutions that genuinely help. Our curiosity and experimental culture exist to discover better ways to support and guide individuals on their self-discovery journeys.Currently, we are seeking a Data Engineer / Analytics Engineer at Liven.In this role, you will be responsible for establishing the company’s robust data foundation, designing storage architecture, and providing analytical teams with quality, ready-to-use data.Challenges Awaiting You:— Ensuring the continuous provisioning of necessary data to analytical teams across various business domains (marketing, product, operations) through stable integrations (using Airbyte and custom solutions);— Organizing long-term DWH architecture (data layer development, modeling, ensuring data integrity);— Developing and optimizing our ELT processes and data transformations within BigQuery using Dataform, as well as implementing reliable process orchestration (with plans to transition to Airflow/Astronomer);What We Value:— Excellent SQL knowledge and a deep understanding of modern analytical warehouse construction concepts;— Practical experience with cloud data ecosystems (ideally GCP, BigQuery) and data transformation tools (Dataform/dbt);

TENTENS Tech, a strategic partner of SKELAR, is a pioneering IT company that builds international tech businesses.Our innovative social discovery platforms serve over 20 million users worldwide. We thrive on our deep expertise in analytics, high-load systems, and performance marketing.Our team at TENTENS Tech is composed of over 250 talented individuals, each acting as a CEO in their role, contributing to our collective success. We embrace a 10/10ths work style: focused on our goals, asking the right questions along the way, and striving for excellence — we settle for nothing less than outstanding. If this resonates with you and you are ready to accelerate your career with us, let's connect!We are currently seeking a Payment Operations Manager to elevate our performance and enhance user payment experiences.This role is for you if:You are excited about working in a large business with high-load products, where data and expertise in product solutions and payments are paramount.You are eager to grow rapidly and develop: you will have the opportunity to enhance your operational and analytical skills under the mentorship of seasoned colleagues.You value involvement in key decisions: the chance to influence business strategy and process development, rather than just completing tasks.Challenges you will face in this role:Managing payment routines and configuring acquirers within them.Working with risk metrics and validating analytics-based decisions.Conducting A/B tests and analyzing results.Integrating new acquirers and monitoring their metrics.Being responsible for key metrics in your domain: Conversions, Approval Rates, VAMP, Chargeback Rates.Coordinating with teams across Operations, Analytics, Finance, Marketing, and Product.What matters to us:Experience in IT, Big4, or FMCG in Analyst, Operations, or related roles.Understanding the payment ecosystem and its intricacies.

Join our dynamic team as a Senior Full Stack Developer specializing in Java and Angular. In this role, you will develop robust web applications, collaborate with cross-functional teams, and significantly contribute to the software development lifecycle.We seek a passionate individual with a solid grasp of both front-end and back-end technologies. If you're excited about building scalable applications and enhancing user experiences, we want to hear from you!

As a Project Marketing Manager at skelar, the focus is on developing and carrying out marketing strategies for technology projects. This position calls for close collaboration with various teams to ensure that marketing efforts align with project goals and company values. What you will do Shape and implement marketing strategies for technology-focused projects Work with cross-functional teams to launch campaigns and initiatives Help connect marketing efforts to the needs and interests of target audiences Support the ongoing growth and visibility of the skelar brand Location This role is based in Kyiv, Lviv, or Warsaw.

Mid-Level Front-End Engineer (Full-stack Oriented) About the Role Join Matic's dynamic team as a Mid-Level Front-End Engineer with a Full-stack perspective. Matic is rapidly evolving, developing innovative web products from the ground up to simplify insurance processes for homeowners across the United States. In this position, you will go beyond merely coding mockups. You will take charge of the user interface and the engineering logic that underpins it. We prioritize meticulous attention to detail, whether it's creating a reusable component library or enhancing the state management of a complex multi-step insurance application. While your primary focus will be on the Front End, we encourage you to explore the full stack, utilizing AI tools to engage with the backend and ensure seamless delivery of features from start to finish. We appreciate engineers who embrace the latest technologies to bridge gaps and expedite our development process.

TENTENS Tech is a partner IT company of SKELAR — a Ukrainian venture builder dedicated to constructing international tech businesses.We create social discovery platforms serving over 20 million users globally. Our momentum and scale are driven by deep expertise in analytics, high-load systems, and performance marketing.Today, the TENTENS Tech team comprises over 250 individuals, each acting as a CEO in their role, impacting collective outcomes. We operate in a 10/10ths style: staying focused on our goals, asking the right questions along the way, and never settling for 'good' — only maximum performance and a bit more. If you identify with this description and are ready to accelerate with us — let’s connect!We are currently seeking a Growth Operations Lead to elevate our performance standards together.Key responsibilities in this role include:Ownership of the Online Reputation Management business directionManagement of a team of 10+ top specialistsOperational excellence: building and optimizing processes in an operations-heavy environmentEstablishing a framework for hypothesis testing and scaling successful outcomesYour influence will extend to:Process architecture, functions, and organizational structureBusiness outcomes of the unitTarget metrics, planning, and decision-makingWhat we value:Experience in building processes and teams in an operations-heavy environmentExperience managing a business unitData-driven mindsetLeadership skills and people management: driving the team while formulating ambitious plans and providing space for them to choose their tools for executionPreferred qualifications:Experience in SERM/ORM/SEO domainsWhat you will gain with us:Access to internal clubs in professional domains: reputation, marketing, development, finance, recruitment...

Role Overview Miratech is looking for a Senior Data Engineer in Lviv. This role focuses on designing, building, and maintaining data pipelines and architectures that support the company's analytics and machine learning goals. The Senior Data Engineer will collaborate with teams across the business to keep data accurate and accessible, supporting decision-making at every level. What You Will Do Design and implement data pipelines and architectures Maintain and optimize systems for data integrity and availability Work with cross-functional teams to support organizational data needs Contribute to Miratech's data strategy and analytics capabilities

Join our dynamic team at Sigma Software as a Senior Data Engineer, focusing on innovative solutions for the GovTech and public sector. You will play a crucial role in designing and implementing data architectures that enhance government operations and public services. This is an excellent opportunity for professionals who are passionate about using data to create impactful solutions.

Join our dynamic team as a Senior Java Developer where you will play a key role in designing and implementing innovative software solutions. You will collaborate with cross-functional teams, ensuring high-quality code and seamless integration of systems. This position offers a unique opportunity to work on cutting-edge projects and advance your career in a supportive environment.

Join our dynamic team at Miratech as a Senior Java Developer. In this role, you will be instrumental in designing, developing, and implementing high-quality software solutions using Java technologies. Your expertise will guide our engineering efforts and contribute to the success of numerous projects.

Sigma Software is looking for a Middle/Senior Test Engineer in Lviv. This position centers on software quality assurance, working alongside skilled colleagues to deliver reliable solutions. Role overview The Test Engineer will help verify software products meet high standards before release. Expect to collaborate with other professionals, share insights, and contribute to projects that make a difference. What you will do Test software solutions to ensure quality and reliability Work closely with developers and other team members Apply current testing methodologies and tools Requirements Experience in software testing (middle or senior level) Strong teamwork and communication skills Interest in learning and applying new technologies

Sigma Software is hiring a Middle/Senior Test Engineer in Lviv. This role centers on maintaining high standards for software quality and performance across a range of projects. What you will do Test software solutions to verify functionality and reliability Work closely with development teams to identify and resolve issues Contribute to quality assurance processes for ongoing and new projects Who we are looking for Experience in software testing or quality assurance Interest in improving software quality and performance Motivation to work on innovative projects with a collaborative team This position is based in Lviv and offers the chance to influence the quality of Sigma Software's products.

Join Sigma Software Group as a Data Engineer and be a key player in transforming data into actionable insights. You will work with cutting-edge technologies to build data pipelines and optimize data flow. This role is perfect for someone who is passionate about data architecture and analytics.