Senior Mobile Engineer / Tech Lead - New Business Initiative

Join SKELAR, a pioneering Ukrainian venture builder focused on creating international tech businesses. Together with our co-founders, we assemble talented teams to succeed in global markets.At SKELAR, we have multiple businesses operating in diverse niches — from EdTech to marketplaces. Our companies are featured among the top startups and product firms in U…

TENTENS Tech is a dynamic IT partner of SKELAR, a Ukrainian venture builder dedicated to creating international tech businesses.We specialize in developing social discovery platforms for over 20 million users globally. Our momentum and scale are driven by deep expertise in analytics, high-load systems, and performance marketing.Currently, our team at TENTENS Tech consists of more than 250 talented individuals, each operating as a CEO in their role and contributing to the collective success. We embrace a 10/10ths work style: focusing on our goals, asking the right questions along the way, and never settling for 'good'—always striving for excellence and beyond. If this resonates with you and you're ready to accelerate with us, let's connect!We are seeking a Senior/Lead Data Engineer to spearhead the development of a high-load Data Platform that processes over 2500 data streams and up to 9 PB of data monthly.In this role, you will be the technical driving force of the direction and will build a platform that provides teams with scalable, reliable, and user-friendly access to data.

Hello, let’s get to know each other better. We are Quarks, a technological company that develops niche products in the areas of Social Discovery & Relationship Wellness. We focus on creating safe and effective solutions for dating and relationship development.Additionally, Quarks is:A team of over 250 QuarksRecognized as a top employer in 2024 by DOUAn eNPS score of 80.4%Having offices in Kyiv, with hubs in Lviv and WarsawOur flagship product, Kismia, is a dating application with over 80 million users across more than 20 locations worldwide. We are also engaged in developing services for marketing, analytics, and moderation.Currently, we are looking for a QA Engineer to join our Internal PaaS team, responsible for development, architecture, QA, DevOps, and other processes that form the technological foundation of our products.We are also open to hiring veterans—creating an environment where you can not just be part of the team, but also grow.Your future tasks:Testing the web application at various stages of the development life cycle (primarily front-end)Identifying, documenting, and tracking defects (bug tracking)Monitoring and supporting already implemented functionalitiesPreparing and updating test documentation (checklists, test cases)Participating in refinement, planning, and estimation processesCollaborating closely with a cross-functional team: developers, AQA, designers, analysts, and PMsWhat we value in this role:At least 1 year of experience in manual testing of web applicationsStrong knowledge of testing theory (types, levels, techniques, etc.)Understanding of the software development life cycle (SDLC)Practical skills in using DevToolsExperience with requirements and technical documentationFamiliarity with tools: Jira, Confluence, TMSBasic understanding of client-server architectureIt would be a plus:Experience in automated testing

Join us at Quarks Tech, a leading technology firm specializing in niche products within the realms of Social Discovery and Relationship Wellness. We are dedicated to developing secure and effective solutions for dating and relationship development, with over 80 million users across more than 20 locations worldwide.At Quarks, we pride ourselves on:250+ talented professionals on our teamRecognized as a top employer for 2024 by DOUAn impressive eNPS score of 80.4%Offices in Kyiv, and hubs in Lviv and WarsawWe are currently seeking a Senior Product Manager to join our Affemity Group. This team is dedicated to creating products and technologies that measurably enhance the quality of life for our users.We are also veteran-friendly, fostering an environment where team members can not only contribute but also grow professionally.Your Impact: You will build a robust B2C product focused on mental and relationship wellness, ensuring measurable benefits for users, high retention, and engagement rates, as well as a healthy unit economy.Expected Outcomes within 6-12 Months:A well-defined product model: metric system, dashboard, and regular decision rhythm established.A solid experimental system: continuous pipeline of tests, with measurable uplift from some.Positive trends in product experience quality, verified by metrics: reduced churn, increased ARPU.Delivery team operates in a systematic and predictable manner.Your Future Responsibilities:Define the North Star and key growth drivers (activation, engagement, retention, monetization), build a product KPI tree, and conduct weekly product reviews.Analyze, design, and implement retention loops, while optimizing paywall and pricing models with a focus on user value and transparency.Prioritize hypotheses and design experiments effectively.Design user flows, establish clear acceptance criteria and Definition of Done, and coordinate with engineers for delivery planning.Establish a continuous feedback loop with users to iterate on product enhancements.

Join our dynamic team at ajax as a Python Tech Lead where you will play a pivotal role in guiding our development efforts. We are looking for an enthusiastic leader who is passionate about technology and can inspire a team of developers to produce high-quality software solutions.Your responsibilities will include overseeing project development, mentoring team members, and ensuring that our coding standards and best practices are adhered to. You will also work closely with stakeholders to gather requirements and translate them into technical specifications.

Speechify’s mission is to make reading accessible for everyone. Over 50 million people use our text-to-speech technology to turn everything from PDFs to news articles into audio, helping them read faster and remember more. Our products span iOS, Android, Mac, Chrome Extension, and Web App. We’ve been recognized as Chrome Extension of the Year by Google and received a Design Award from Apple in 2025. Our fully distributed team of about 200 includes frontend and backend engineers, AI researchers, and veterans from companies like Amazon, Microsoft, and Google. We also work alongside alumni from Stanford and founders of startups such as Stripe and Vercel. Role overview Speechify’s Android app leads the Play Store in text-to-speech. We’re hiring a Tech Lead for Android Core Product to guide feature development and improve the app’s core experience. This role is ideal for someone who thinks strategically, enjoys quick-moving projects, and cares about delivering a polished user experience. What you will do Lead technical direction for Speechify’s Android app Drive new feature development and refine existing functionality Collaborate with a global team in a flat structure that values technical leadership and results Promote high standards for code quality, performance, and user experience What we look for Strong work ethic and a drive to achieve results Clear, effective communication skills Experience leading Android development projects Comfort working in a distributed, collaborative environment Competitive spirit and a focus on delivering for users Interview process The interview process includes several technical interviews, usually completed within one week. Location This role is based in Kyiv, Ukraine.

TENTENS Tech is a partner IT company of SKELAR, a Ukrainian venture builder focused on creating international tech businesses.We develop social discovery platforms for over 20 million users worldwide, driven by deep expertise in analytics, high-load systems, and performance marketing.Our team at TENTENS Tech consists of over 250 professionals, each acting as a CEO in their role and contributing to collective success. We adhere to the 10/10ths philosophy: we stay focused on our goals, ask the right questions along the way, and never settle for "good"—we strive for excellence and beyond. If you resonate with this description and are ready to accelerate with us, let's connect!We are currently seeking a Backend Engineer (PHP/Go) to help elevate our performance standards.

Ajax Systems is seeking a dynamic and proactive Global Administrative Technology Lead to enhance our infrastructure across existing and new locations. In this pivotal role, you will be responsible for optimizing administrative processes, ensuring seamless integration of technology solutions, and fostering collaboration among teams worldwide. Join us in our mission to deliver cutting-edge security systems and contribute to our rapid growth within the industry.

Role overview Vacancies seeks a Mobile Product Manager in Kyiv to guide the development and ongoing enhancement of mobile products. The position centers on improving user experience and increasing engagement. Collaboration is key, as the role works closely with design, engineering, and marketing teams to shape the product vision and execute on strategy. What you will do Partner with design, engineering, and marketing to define and deliver product strategy Conduct market research to spot trends and identify new opportunities Collect and analyze user feedback to guide product decisions Create and update product roadmaps Set and monitor key performance indicators (KPIs) to evaluate product success Requirements Strong interest in mobile technology Keen attention to detail Experience collaborating with cross-functional teams This Kyiv-based role offers the opportunity to influence the direction of Vacancies' mobile products while working with a supportive and collaborative team.

TENTENS Tech is a partner IT company of SKELAR — a Ukrainian venture builder focused on creating international tech businesses. We develop social discovery platforms that serve over 20 million users worldwide, leveraging deep expertise in analytics, high-load systems, and performance marketing.Our team at TENTENS Tech consists of over 250 talented individuals, each acting as a CEO in their role, significantly contributing to our collective goals. We operate with the 10/10ths philosophy, aiming for excellence and continuously pushing beyond just ‘good’ to achieve outstanding results. If this resonates with you and you're ready to accelerate with us, let’s connect!We are currently seeking an HR Lead to elevate our performance standards.Key Responsibilities:— Partner with business leaders to understand goals, context, constraints, and translate these into a people plan with measurable outcomes.— Drive organizational design and capacity planning: structure, roles, grading, headcount planning, and team changes that support strategy and speed.— Build talent retention and development strategies: succession planning, individual development plans, and career tracks.— Manage the performance cycle end-to-end in relevant business areas: setting objectives, evaluation, calibration, and development — with transparency and no surprises.— Monitor achievement of targeted HR metrics in business areas: regularly review key metrics, identify reasons for deviations, coordinate corrective actions with the business, and drive measurable results.What We Value:— Experience as an HRBP with business: ability to build relationships with stakeholders, formulate a people initiative plan, and deliver results.— Expertise in developing people management skills: goal setting, delegation, development, constructive feedback, etc.— A data-driven approach: making decisions and evaluating results based on metrics, experiments, and causal relationships.— Business orientation and focus on outcomes rather than processes.— Communication and influence: ability to negotiate, argue constructively, listen, and achieve win-win solutions.— High level of ownership: take responsibility, lead initiatives end-to-end, and do not wait for “technical tasks”.Nice-to-Have:— Experience in a Senior HRBP/HR Lead role managing a team (preferably 5+ individuals) and HR functions.What You Will Gain with Us:— Internal clubs for professional growth and networking, and opportunities for collaboration on exciting projects.

TENTENS Tech, a partner IT company of SKELAR, is at the forefront of building international tech businesses from Ukraine.We create innovative social discovery platforms that serve over 20 million users globally. Our impressive pace and scale are fueled by deep expertise in analytics, high-load systems, and performance marketing.Our team at TENTENS Tech consists of over 250 professionals, each acting as a CEO in their role and contributing to our collective success. We operate with a 10/10ths mentality: we keep our sights on our goals, ask the right questions along the way, and never settle for 'good enough' — we strive for excellence and beyond. If you resonate with this mindset and are ready to accelerate with us, we want to meet you!We are currently seeking a Backend Team Lead to help elevate our standards of excellence.

TENTENS Tech is a strategic partner of SKELAR, a Ukrainian venture builder dedicated to developing international tech businesses.We create social discovery platforms for over 20 million users globally. Our pace and scale are supported by deep expertise in analytics, high-load systems, and performance marketing.Today, the TENTENS Tech team consists of more than 250 professionals, each acting like a CEO in their role and contributing to our collective success. We operate with a 10/10ths mindset: aiming for excellence, asking the right questions along the way, and never settling for 'good enough'—we strive for maximum impact and beyond. If this resonates with you and you’re ready to accelerate with us—let’s connect!We are currently seeking a Backend Team Lead to help elevate our results.

Join TENTENS Tech, a dynamic partner of SKELAR, a Ukrainian venture builder focused on creating international tech businesses.We develop social discovery platforms for over 20 million users worldwide, driven by our deep expertise in analytics, high-load systems, and performance marketing.Our team of 250+ professionals operates like CEOs in their roles, influencing collective outcomes. We embody the 10/10ths approach: keeping our sights on targets, asking the right questions along the way, and never settling for 'good'—only striving for excellence and beyond. If this resonates with you and you're ready to accelerate with us, let's connect!We are currently seeking an SEO Lead to elevate our performance standards.Key challenges awaiting you in this role include:Managing projects related to real brand reputations with a direct impact on search engine results.Engaging with diverse formats and a wealth of practical cases for rapid professional growth.Operating in top markets, primarily the USA, within a highly competitive niche.Analyzing trends and competitors, integrating effective SEO practices into team workflows.Tracking, analyzing, and reporting on SEO effectiveness, providing insights for enhancing business metrics.Building a systematic SEO architecture with process automation considerations.Collaborating at the intersection of SEO, SERM, content, and link building.Your impact will include:Increasing organic traffic in top markets.Enhancing process efficiency through automation (API, n8n, Make, etc.).Developing the SEO roadmap and prioritizing tasks at the business level.Strategizing SERM initiatives and project scaling.What we value:3+ years of SEO experience with proven results in competitive niches in top markets.Experience with large websites (5-10k+ pages) or managing multiple projects simultaneously.Capability in building SEO strategies and managing substantial task volumes.Deep understanding of technical SEO implementation.

TENTENS Tech is looking for a Backend Team Lead to support its MarTech initiatives in Kyiv. This leadership position centers on guiding backend development and helping the team achieve higher performance. What you will do Lead and mentor backend engineers working on MarTech projects Guide technical decisions and support the team’s growth Promote high standards and help the team reach new levels of performance About TENTENS Tech TENTENS Tech partners with SKELAR, a Ukrainian venture builder focused on building international tech businesses. The company’s main products are social discovery platforms used by more than 20 million people worldwide. The team includes over 250 members who are encouraged to take ownership and show initiative. TENTENS Tech values focus, thoughtful questions, and a drive to exceed expectations. Ambition and a commitment to excellence are at the core of the company culture.

Speechify’s mission is to remove barriers to reading and learning. With a user base of over 50 million, Speechify converts documents, books, Google Docs, articles, and websites into audio, helping people read faster and understand more. Our products span iOS, Android, Mac, a web app, and a Chrome extension. Recent recognition includes Chrome Extension of the Year from Google and Apple’s App of the Day. About the Team Speechify’s nearly 200 team members work fully remotely around the world. The group includes frontend and backend engineers, AI research scientists, and professionals with experience at Amazon, Microsoft, Google, and graduates from universities such as Stanford. Role Overview This Tech Lead position focuses on Web Core Products and the Chrome Extension. The role suits someone who approaches product decisions strategically, enjoys shaping user experiences, and thrives in a setting where priorities shift and impact is visible. Technical leadership and hands-on delivery are both important here. What Matters Here Consistent delivery of high-quality technical solutions Clear, effective communication with teammates and stakeholders Strong work ethic and personal drive Ability to lead through technical expertise rather than hierarchy Interview Process The process includes several technical assessments. The aim is to complete all steps within one week. Location This role is based in Kyiv, Ukraine. The team operates remotely.

Quarks Tech develops niche products for social discovery and relationship wellness, serving over 80 million users in more than 20 countries. The company is recognized for its commitment to safe, effective solutions in dating and relationship development. With a team of over 250 people, Quarks Tech has earned recognition as a Top Employer in 2024 by DOU and maintains an impressive eNPS score of 80.4%. The main office is in Kyiv, with additional hubs in Lviv and Warsaw. The Senior Product Owner will join the Affemity Group, focusing on products and technologies designed to improve quality of life. Quarks Tech welcomes applications from veterans and aims to create an environment where every team member can grow. Role overview This position owns the full product lifecycle for offerings that deliver measurable benefits to users, with strong retention and engagement and a healthy unit economy. What you will do Set product direction: decide which requests to address, define user outcomes, and determine which experiments to run. After each experiment, make decisions to scale, close, or pivot. Manage the product cycle: maintain a hypothesis queue, establish clear metrics before each test, and diagnose failures at various levels (AI quality, mechanics, product output, or user requests). Collaborate with the Technical PM: define what to build and for whom, while the Technical PM manages implementation and timelines. Work directly with the AI team: set quality standards for responses, investigate failures, and iterate on improvements. This responsibility is not delegated to developers. Independently analyze data: use tools such as Amplitude, Mixpanel, GA4, and SQL (basic to intermediate) to review cohorts, funnels, and retention. Requirements At least 4 years in product management, with a minimum of 2 years in B2C subscription or payment model products, including responsibility for retention. Experience taking a product from 0 to 1 or working pre-product-market fit. Lead-level background: autonomous ownership, collaboration with C-level executives, and full responsibility for decisions. Learn more about Quarks Tech at quarks.tech.

Join Ajax Systems, a leading international technology company and Europe's largest manufacturer of security systems, as we seek a talented Senior Mechanical Engineer. With over 4.5 million end users and 330,000 PRO users across more than 180 countries, our solutions provide robust protection for residential and commercial properties of all sizes. Our diverse portfolio includes 280 devices focused on intrusion prevention, video surveillance, fire safety, and automation. We are experiencing rapid growth both in our team size and our global user base. As part of our R&D division, which encompasses four departments—System, Device, Automation, and QA—you will play a crucial role in the Device Department. This team focuses on innovating security and automation devices while overcoming significant challenges, including: - Low-Power: Ensuring devices operate for extended periods on standard batteries. - Cost Efficiency: Maintaining competitive pricing for mass-market products. - DFM (Design for Manufacturing) and DFH (Design for Humans): Creating designs that are easily replicable in high volumes without sacrificing quality. Our development primarily utilizes STM32 microcontrollers, along with other MCUs and SoCs, employing Embedded C programming. We have cultivated a strong team of skilled Hardware and Embedded C engineers, industrial designers, and mechanical design engineers. We are now seeking an experienced engineer who is eager to advance their career as a Mechanical Engineer.

TENTENS Tech, a partner IT company of SKELAR, is a pioneering Ukrainian venture builder focused on creating international tech businesses.We design social discovery platforms catering to over 20 million users globally, fueled by our deep expertise in analytics, high-load systems, and performance marketing.Our team at TENTENS Tech consists of 250+ professionals, each acting like a CEO in their role, significantly impacting our collective success. We embrace the 10/10ths philosophy: aiming for our goals, asking the right questions along the way, and never settling for 'good enough' — only striving for excellence and beyond. If you resonate with this description and are ready to accelerate with us, let's connect!We are currently seeking a Senior SEO Specialist to elevate our performance standards. Challenges you will face in this role:Managing projects focused on the reputation of real brands with direct influence on search results.Engaging with diverse formats and numerous practical cases - rapid professional growth.Working in Tier-1 markets (primarily the USA) within a highly competitive niche.Analyzing trends and competitors, integrating effective SEO practices into team operations.Tracking, analyzing, and reporting on SEO performance, providing insights for business metric improvements.Building a systematic SEO architecture with a focus on process automation.Collaborating at the intersection of SEO, SERM, content, and link building.What you will impact:Growth of organic traffic in Tier 1 markets.Process efficiency through automation (API, n8n, Make, etc.).Development of an SEO roadmap and prioritization of tasks at the business level.Strategy formulation for SERM and project scaling.What we value:3+ years of SEO experience with proven results in competitive niches in Tier 1 markets.Experience managing large websites (5,000–10,000+ pages) or multiple projects simultaneously.Ability to develop SEO strategy and manage large volumes of tasks.Deep understanding of technical SEO and experience with automation (API, n8n, Make, or similar tools).Strong knowledge of search algorithms and SEO best practices; awareness of industry trends and updates.

Welcome! We are looking for a Senior HR Business Partner who will become a strategic partner for early-stage businesses at Universe Group during their formation and rapid scaling phases.Universe Group is a product-focused tech company dedicated to building and scaling businesses in the digital environment. We create companies, teams, and products that rapidly grow from early-stage ventures to expansive businesses, unlocking new market opportunities.At the heart of our operations lies UniCore, a team that integrates HR, Talent Acquisition, PR & Communications, Employee Experience, Learning & Development, Strategy & Growth, and Finance & Legal. This is where we develop the processes, teams, and environment that enable businesses to scale and become global players.This role is for you if you:Have 3+ years of experience as an HR Business Partner / HR People Partner or 5+ years as an HR Generalist in a systematic product company with well-structured HR processes.Possess hands-on experience with the complete employee lifecycle: onboarding, performance management, development, compensation, retention, and offboarding.Have experience collaborating with executives such as Heads, CEOs, or Founders.Understand HR metrics and can leverage data for decision-making. You not only identify symptoms but also uncover root causes and build processes with future growth in mind.Thrive in dynamic environments: scaling, transformation, and rapid changes energize you rather than intimidate.Are willing to take responsibility and ownership for outcomes.Experience in product tech companies is a plus.Future responsibilities include:Acting as a partner for the CEO and team leaders of early-stage businesses on matters of organizational structure, management development, team effectiveness, and culture.Conducting HR audits of businesses, identifying key risks and growth points, and formulating priorities and initiative plans.Initiating and implementing necessary HR processes for the business: performance management, goal setting, talent reviews, compensation frameworks, and more.Managing the full employee lifecycle from onboarding to development, retention, and offboarding.Diving deep into the business context, organizational structure, roles, teams, and products.

Welcome to Liven! We are pioneering a global ecosystem of innovative products designed to empower individuals in their journey of self-discovery, helping them overcome negative thoughts and behaviors.Our Ecosystem Includes:Self-Discovery Companion — an app that has already impacted 2.5 million users, fostering deeper self-relationships through AI coaching, mood tracking, sound practices, and engaging bite-sized learning.Online Coaching — expert-led sessions to assist in navigating life's complexities.Supplements — products aimed at physical recovery and overall wellness.Liven thrives on curiosity. Our team is passionate about innovation and committed to creating impactful solutions that guide individuals on their self-discovery path. We foster a culture of experimentation to continuously improve how we support our users.We are searching for a Lead Front-End Engineer to spearhead the development of our builder solutions and complex automation systems. This role is ideal for those who relish the challenge of constructing tools that facilitate internal processes, requiring a keen focus on architectural flexibility, performance, and high-load visual editors.