About Toloka AIAt Toloka AI, we are at the forefront of developing data that drives advanced Generative AI models and innovations. Collaborating with top-tier labs, major tech companies, esteemed AI startups, enterprises, and non-profit research organizations globally, we harness the power of a unique blend of expertise, community, and technology. Our team comprises specialists from over 50 different fields, including medicine, law, physics, and engineering, backed by one of the most diverse global crowds, representing over 100 countries and communicating in more than 40 languages.We are a well-capitalized startup with an impressive portfolio of clients, including Anthropic, Amazon, Microsoft, poolside, Recraft, and Shopify. Recently, we secured strategic investment from Bezos Expeditions, joined by Mikhail Parakhin, CTO of Shopify and a board advisor to leading Generative AI companies, who now serves as our Chairman. Our remote-first team is globally distributed, with members in the USA, UK, Netherlands, Israel, Czech Republic, Serbia, and more, with our headquarters based in Amsterdam.Our VisionWe believe that the future of work hinges on effective collaboration between humans and AI rather than relying on fully autonomous systems. This belief drives the development of Tendem AI—the first hybrid AI-human agent designed to streamline knowledge work. By integrating client requests with an AI workflow overseen and fine-tuned by human experts, we deliver high-quality outcomes. Tendem offers the swift efficiency of AI alongside the reliability and accountability of seasoned professionals.

ruby-labs is seeking a Senior Growth Product Manager based in the European Union. This position centers on shaping product strategy and leading growth initiatives to strengthen the company’s market position. Role overview The Senior Growth Product Manager will focus on analyzing market trends and collecting customer insights. The goal is to identify opportunities that improve product offerings and increase user engagement. Success in this role depends on a strong understanding of both customer needs and competitive dynamics. Collaboration This role works closely with teams from different disciplines. Expect to partner with colleagues across product, engineering, design, and marketing to develop solutions that address user needs and support company growth. Key responsibilities Drive product strategy and growth-focused projects Analyze market trends and customer feedback Enhance product features to increase user engagement Collaborate with cross-functional teams to deliver new solutions

We are seeking a highly motivated and experienced Senior Growth Product Manager to join our dynamic team at ruby-labs. In this role, you will play a pivotal part in driving product growth and enhancing user engagement through innovative strategies and data-driven decisions.Your responsibilities will include analyzing market trends, defining product roadmaps, collaborating with cross-functional teams, and leading initiatives that contribute to our overall growth objectives. You will have the opportunity to leverage your expertise in product management to develop and implement solutions that meet the needs of our users and drive business success.

Playson is a premier iGaming provider that operates within various regulated markets, delivering captivating casino content and cutting-edge technology solutions. As a rapidly growing and innovation-driven company, we prioritize autonomy and ownership in our culture. At Playson, we actively seek individuals who are curious, proactive, and enthusiastic about tackling complex challenges on a large scale.We take pride in being ISO/IEC 27001 certified, emphasizing our commitment to maintaining a strong security and compliance posture across all business operations.About the RoleWe are in search of a Security Lead to enhance Playson’s information security framework and promote the ongoing improvement of our security culture.This position requires a blend of technical acumen, investigative diligence, and leadership in processes to guarantee that our systems, data, and personnel are secure, compliant, and resilient.Key Responsibilities:Information Security & ComplianceContinuously maintain and enhance the ISO/IEC 27001:2022 Information Security Management System (ISMS).Cultivate a robust Security-First mindset throughout the organization.Collaborate closely with the CTO, Head of IT, and DevOps teams to strengthen internal security controls.Conduct internal audits, risk assessments, and manage certification renewals.Update security policies and controls in accordance with ISO 27001, GDPR, and other relevant international frameworks (such as NIST CSF and NIS2 principles where applicable). Manage integrations and alerts within Datadog SIEM, CrowdStrike, Cloudflare, and Google Workspace.Support DLP implementation and maintain centralized tracking of security events.Document risks, incidents, and corrective measures to ensure continuous compliance.Incident Response & InvestigationLead investigations into security incidents, including phishing attacks, data breaches, and unauthorized access.Collect and analyze digital evidence across various systems (CrowdStrike, Cloudflare, Google, Slack).Enhance and maintain incident response playbooks and escalation workflows.

Join Our Team as a Technical Lead for the Boosters!Focus: Developing high-load, distributed promotional features for players.Role Type: A hands-on leadership position with 80% dedicated to delivery and 20% to team leadership.Why You Should Apply: As we expand our Promotional Features domain, this pivotal role will enable you to personally design and deploy production-ready features while steering the technical direction of the Boosters team. We prioritize performance, scalability, and reliability in all our projects.About Boosters: Our team is responsible for innovative player-facing promotional features, including:TournamentsFree SpinsProgressive JackpotsSmart Prize Drop SystemsTeam Structure: The Tech Boosters team is an end-to-end cross-functional group comprised of:Full-stack & Backend EngineersAutomation QA & Manual QASite Reliability Engineers (SRE)Collaboration: You will collaborate with a Product Commercial Manager who acts as the customer, defining what is needed, the urgency, and the market requirements. Your technical team will determine the development process and timeline.What We Are Looking For:Expertise in Node.js and TypeScript (our main backend technologies). We are also open to proficient backend engineers from other languages (e.g., Go, Java, C#, C++) who can adapt quickly.Strong understanding of asynchronous programming and concurrency patterns.Experience in building distributed systems with messaging and coordination technologies (e.g., Kafka, RabbitMQ, NATS).Familiarity with gRPC in production environments.

Role Overview Castai Group Inc. is looking for a Senior Product Marketing Manager - Core based in the European Union. This role shapes product marketing strategy and works closely with cross-functional teams to define product positioning, messaging, and go-to-market plans. The position focuses on connecting with target audiences and supporting product direction to help reach more of the market.

Join Our Team as a UX LeadAt Ruby Labs, we are at the forefront of technology, dedicated to developing and managing breakthrough consumer products. We pride ourselves on our diverse portfolio spanning health, education, and entertainment sectors. Our vision is driven by innovative teams that are shaping the future of consumer-centric solutions. Explore our journey and values at: https://rubylabs.com/about-us/Your RoleAs we scale our high-growth direct-to-consumer product utilized by a vast customer base worldwide, we recognize that user experience (UX) is pivotal to our growth strategy.We are in the process of launching new products, enhancing our capabilities, and prioritizing customer retention, activation, and overall funnel performance.We are seeking a UX Lead who will assume complete responsibility for design, user experience, and user research—not as a peripheral function, but as a fundamental force driving product and business success.Currently, design is primarily executed directly in the frontend, and our UX research requires a more structured approach. You will be instrumental in transforming this landscape.This is a dynamic role requiring high levels of ownership and impact, ideal for an individual eager to build systems, lead teams, and directly influence product growth.Key ResponsibilitiesOversee and enhance UX, design quality, and user journeys across all products.Establish and maintain a robust, scalable design system, even if primarily implemented in the frontend.Lead and mentor designers and frontend engineers engaged in UI/UX projects.Transform UX into a measurable growth driver by boosting activation, retention, and conversion rates.Collaborate closely with Product and Growth teams to design and streamline funnels, onboarding processes, and monetization strategies.Develop a structured methodology for UX research, which includes:Setting research priorities,Conducting surveys and interviews,Deriving actionable insights.Make data-driven UX decisions by:Analyzing product metrics (using tools like Mixpanel and Clarity),Identifying opportunities for UX enhancements.

About UsAt Ruby Labs, we are at the forefront of technology, developing and managing cutting-edge consumer products. Our portfolio spans various sectors, including health, education, and entertainment, providing numerous opportunities for innovation and creativity. We are passionate about creating products that enhance the lives of consumers and are constantly seeking enthusiastic individuals to join our dynamic team. Discover more about our journey and mission at Ruby Labs.About the RoleWe are currently seeking a talented Lead React Native Developer to join our expanding engineering team. In this pivotal role, you will be responsible for spearheading our mobile initiatives, focusing on product quality and tackling architectural challenges. You will have the opportunity to take ownership of critical features that our users depend on, while significantly contributing to the enhancement and scalability of our mobile applications.Your expertise will be instrumental in shaping the future of our mobile offerings, collaborating with backend and product teams to ensure a seamless, high-performance user experience.Key ResponsibilitiesOversee the development and launch of new mobile product features.Enhance and maintain the existing React Native codebase to ensure optimal performance and stability.Define and evolve mobile architecture, system design, and technical strategies.Collaborate with backend, product, and design teams to create scalable solutions.Establish reliability, performance, and observability standards for mobile applications.Manage production debugging, incident investigations, and root cause analyses.Facilitate improvements in build systems, CI/CD processes, releases, testing, and app store submissions.Mentor junior engineers and cultivate a culture of quality, accountability, and excellence.Support recruitment efforts to build a top-tier mobile engineering team.Champion performance optimizations across various metrics including rendering, navigation, and offline capabilities.Lead with a focus on accountability for failure scenarios, API degradation, user recovery experiences, and resilience.Qualifications5+ years of experience in mobile application development, with a strong focus on React Native.2+ years in a technical leadership or lead developer role.Proficient in mobile architecture, design patterns, and best practices.Experience with CI/CD tools and automated testing frameworks.Strong problem-solving skills with a passion for coding and software design.Excellent communication skills, both verbal and written.

About Us:At onhires, we are dedicated to developing a powerful and scalable trading platform tailored for high-traffic, latency-sensitive applications. Our infrastructure utilizes cutting-edge technologies to facilitate real-time trading while ensuring unmatched reliability and performance. Join us to contribute to the evolution of our platform and engineering culture.Job Summary:We are seeking a Lead DevOps & Platform Engineer to spearhead the design, implementation, and management of our AWS-centric infrastructure. In this crucial role, you will enhance the productivity of our product engineering team while ensuring platform scalability, reliability, and security. This position blends elements of DevOps, Platform Engineering, and Site Reliability Engineering (SRE). You will advocate for best practices, influence our engineering culture, and guarantee that our platform remains robust, efficient, and future-ready.Key Responsibilities:Platform EngineeringInfrastructure Design: Design and implement scalable infrastructure to support the deployment and management of our trading platform.Developer Tooling: Create and maintain internal tools that enhance developer workflows, including sophisticated CI/CD pipelines.Infrastructure as Code (IaC): Advocate for and implement IaC practices using Terraform, CloudFormation, or Pulumi.Core Services Management: Oversee and optimize platform-critical services, including:NATS ClusterRabbitMQAWS RDS PostgreSQLRedis ClusterDevOpsAutomation and CI/CD: Streamline and optimize deployment processes to ensure smooth continuous integration and delivery.Container Orchestration: Oversee and scale containerized workloads utilizing Kubernetes and Docker.Cloud Optimization: Assess and enhance cloud resource utilization for optimal performance and cost-effectiveness.Site Reliability Engineering (SRE)Reliability Metrics: Develop and uphold Service Level Objectives (SLOs) and Service Level Indicators (SLIs).Monitoring & Observability: Implement monitoring tools and dashboards (e.g., Prometheus, Datadog, Grafana) for enhanced visibility into system performance.

Join Our Vision at EverAI Welcome to EverAI — Pioneering the Future of AI CompanionshipRecognized as one of the Top 15 Largest and Fastest-Growing AI Companies Globally40 Million Users in Just 2 Years — Help Us Achieve 100M, Then 500M!At EverAI, we are not just innovating in AI; we are redefining human connection through technology. With an ever-growing user base of 40 million, we are establishing entirely new categories within the AI landscape.Our flagship product is the largest AI girlfriend/boyfriend platform, transforming relationships for millions. Our unique moderation system, EverGuard, ensures that everything we create is safe, ethical, and prioritizes the human experience.And this is just the beginning!Meet Our Dynamic TeamOur dedicated and vibrant team of 75 passionate professionals is led by entrepreneurs with a wealth of experience in scaling web products from inception to IPO.Meet Our Leaders:Alexis Soulopoulos [CEO]• Over 10 years in Tech Executive Leadership• Co-Founder of Mad Paws Holdings (from 0 to IPO)• Recognized by Forbes 30 under 30 + Deloitte TechFast50 ’22 & ‘23Michael Monin [Co-founder & CTO]• 10+ years as CTO / COO (web2/web3), 1+ year in AI/LLM• Serial entrepreneur with successful exitsThomas Lacroix [Co-founder & CMO]• 8+ years in Customer Acquisition & E-commerce Growth• Serial entrepreneur with notable exitsMaruša Fasano [CFO/Legal]• 25+ years in Finance, Strategy, and M&A• Extensive experience in successful company exitsWhy Join Us?You will be at the forefront of building groundbreaking AI technologies, shaping the future of AI companionship.

Join Our TeamAt Ruby Labs, a pioneering technology company, we are dedicated to developing and managing innovative consumer products across health, education, and entertainment sectors. Our dynamic teams are at the forefront of consumer-oriented innovations, and we are eager to welcome passionate individuals to join our mission. Discover more about us here.Your RoleWe are excited to announce an opening for a Lead Full-Stack Engineer to spearhead the development of a new Direct-to-Consumer product within the AI sector. As a Lead Engineer, you will guide an engineering squad responsible for a crucial segment of our product, setting the technical vision and ensuring high standards for engineering quality and delivery.In this role, you will create and sustain scalable systems utilizing Next.js, TypeScript, React, and Redis. You will also oversee the development process, manage release schedules, perform code reviews, and provide mentorship to fellow engineers. A key requirement for this position is a proven track record in developing AI-driven tools or applications.You will collaborate closely with product leadership and management to guarantee that our engineering team consistently delivers reliable and high-performing features.

Role overview ruby-labs is looking for a Head of SEO to shape and execute the company’s search strategy across the European Union. This role leads efforts to improve online visibility and search rankings, working with teams across the business to align SEO activities with overall goals. What you will do Develop and implement SEO strategies that support business objectives Analyze search data to identify trends and opportunities Optimize website content for better search engine performance Lead and mentor a team of SEO professionals Collaborate with other departments to ensure SEO best practices are integrated throughout projects Location This position is based in the European Union.

Zartis partners with organizations around the globe to deliver technology consulting and AI transformation. The team focuses on AI-driven platforms, secure API design, and cloud-native engineering. With engineering hubs throughout EMEA and LATAM, Zartis supports clients in sectors such as financial services, healthcare, life sciences, and energy. Collaboration, measurable outcomes, and career growth are core values, and the company emphasizes working alongside experienced professionals. Role overview This Senior Software Engineer (Node.js / AWS) position centers on a project in the education technology sector. The distributed team includes people from a range of backgrounds, all brought together by a culture of trust and innovation. The work aims to build solutions that improve university programs, student services, exam preparation, and corporate training worldwide. Candidates who are proactive, communicate clearly, make thoughtful decisions, and enjoy building software from the ground up with attention to detail will thrive in this role. What you will do Develop RESTful services using AWS API Gateway and Lambda with Node.js and NestJS. Design and implement scalable, event-driven microservice architectures with Amazon EventBridge, SNS, SQS, RabbitMQ, and AmazonMQ. Lead engineering initiatives and collaborate with cross-functional teams and stakeholders. Integrate external APIs into core systems. Use GitHub Copilot in daily development, including AI-assisted code reviews within CI/CD pipelines. Requirements Minimum 6 years of experience with Node.js and frameworks such as Express, NestJS, or Koa. Hands-on experience with AWS, particularly Lambda (serverless) and infrastructure-as-code using Terraform. Strong skills in TypeScript. Experience working with message brokers and asynchronous communication in distributed systems. Proficiency with Git and established version control practices. Familiarity with Agile or Scrum methodologies. Location This position is open to candidates based in the European Union.

About Us:Zartis is a leading digital solutions provider specializing in technology strategy, software engineering, and product development. We collaborate with organizations across various sectors including financial services, MedTech, media, logistics technology, renewable energy, EdTech, and e-commerce. Our engineering hubs in EMEA and LATAM are home to a diverse group of skilled professionals driving business success and enhancing digital capabilities through application development, software architecture, CI/CD, business intelligence, QA automation, and cutting-edge technology integrations.We are currently seeking a Senior Software Engineer to join our team and work on an exciting project within the logistics sector.Project Overview:You will be joining a talented and diverse team dedicated to fostering an inclusive culture grounded in trust and innovation. As part of a distributed team, you will support a logistics leader that offers expert consulting, specialized software, and managed services (4PL) to streamline end-to-end logistics operations.We are looking for a candidate with strong communication skills, a proactive approach, and a solid background in building software from the ground up while maintaining attention to detail.Your Responsibilities:Design and develop backend components that serve as the foundation of our digital products, utilizing Java and Spring Boot as your primary toolkit.Implement and maintain well-structured RESTful APIs, adhering to best practices in API design to ensure reliability, clarity, and long-term maintainability.Engage in the complete software development lifecycle from ideation and implementation to testing and deployment, taking ownership of clean, efficient, and maintainable code.Collaborate closely with frontend, DevOps, and QA teams to ensure seamless integration across systems and contribute to delivering a smooth, high-quality user experience.Participate in code reviews, share innovative ideas, and assist in evolving our engineering practices.

Zartis partners with organizations worldwide to deliver technology consulting and AI transformation. Teams collaborate closely with clients to design, build, and scale solutions that address real business needs. With engineering centers in EMEA and LATAM, Zartis supports industries such as financial services, healthcare, life sciences, and energy and climate. Engineers at Zartis bring expertise in AI-driven platforms, secure API architectures, and cloud-native development. Projects cover the entire lifecycle, from strategy and discovery through to product delivery, with a focus on solving complex problems and making a measurable impact. Team members have opportunities to contribute to business growth and learn from experienced professionals across sectors. Role overview This Senior Software Engineer position focuses on full-stack development for a fintech project. The team values inclusion, trust, and innovation, bringing together people from diverse backgrounds to solve challenges in financial technology. Project focus The role involves joining a distributed group working on financial process automation tools. The aim is to increase productivity, lower costs, and support compliance for client organizations. Work centers on building solutions that streamline financial operations and deliver measurable business value. Main responsibilities Design, build, and maintain high-performance, reusable full-stack applications. Collaborate with Product and cross-functional teams to define and deliver end-to-end technical solutions. Contribute in an Agile environment, using Lean principles focused on CI/CD, automated testing, and continuous delivery. Follow established engineering best practices, code quality standards, and development processes throughout the delivery lifecycle. Take ownership of technical design and provide accurate estimates for complex tasks and projects. Engage with customers and stakeholders to ensure deliverables meet requirements and expectations. Monitor solution quality and stability, suggest improvements, and propose changes as needed. Requirements At least 5 years of experience building applications in Java, with a focus on Spring or Spring Boot. Hands-on experience with React and TypeScript. Strong understanding of event-driven architecture and microservices. Excellent communication skills and a proactive approach to decision-making. Attention to detail and experience developing software from the ground up. Location This position is open to candidates based in the European Union.

Playson is a prestigious online gaming supplier, celebrated globally since its inception in 2012. We specialize in delivering comprehensive gaming solutions that incorporate cutting-edge technology and thorough market analysis, catering to top-tier iGaming operators.We are on the lookout for a talented Senior Marketing Graphic Designer to revolutionize our game promotions and elevate our brand presence among partners. This pivotal role is part of the Marketing Squad, directly influencing how Playson is perceived across various channels.In our quest to enhance our creative capabilities, we seek a seasoned professional who can spearhead the evolution of our marketing visuals and foster the growth of our Graphic Artist stream.

Join AppFollow, a leading App review management and ASO platform dedicated to empowering app developers and product teams.We aim to simplify the daily tasks of app developers, product managers, marketing teams, and customer support professionals. AppFollow enables the collection and management of app and game data, boosts app ratings, enhances store rankings, and fosters user loyalty.This fully remote opportunity is perfect for a Senior Backend Engineer eager to contribute to AppFollow's global expansion. You will work on the essential backend systems that facilitate user engagement with product data, ensuring quick and efficient access to diverse datasets, while supporting flexible analytics and reporting capabilities across various data types.Key Responsibilities- Enhance and optimize the core backend functionalities of the AppFollow platform.- Develop and maintain systems for user interaction with product data.- Design and implement a source-agnostic data storage layer that ensures efficient, rapid, and dependable data delivery to users.- Create and support systems that generate insights from various customer and product data, including ratings, reviews, and other data sources, emphasizing customizable reporting.- Develop and support internal and public APIs for core data entities, adhering to API-first principles.- Design, build, maintain, and document a reliable, secure, efficient, and scalable codebase.- Collaborate with other developers to design and enhance the overall system architecture.- Engage with legacy services.- Work with the Platform team to deploy applications across various environments, ensuring smooth operations while adopting established standards and practices.Your Profile - 5+ years of experience in backend development with a strong focus on scalability and performance.

Playson is a prominent online gaming provider, established in 2012, renowned for delivering comprehensive gaming solutions that leverage cutting-edge technologies and in-depth market insights tailored for top-tier iGaming operators.We are currently on the lookout for a Senior Full-Stack Engineer to join our promotional features team. This role is ideal for someone with a strong backend focus (Node.js/TypeScript) while also possessing confidence in frontend technologies (React). You'll be responsible for designing, building, and refining features that are not only robust and scalable but also a delight for users.If you are passionate about products, eager to tackle complex engineering challenges, and have a rapid 'Proof of Concept first' mindset with a strong sense of ownership, we would love to connect with you.Key Responsibilities:Craft, develop, and sustain backend services for promotional features utilizing Node.js/TypeScript.Create and enhance the frontend UI in React (with Redux or modern state management), prioritizing usability and performance.Optimize existing architectures for high throughput, minimal latency, and exceptional scalability.Guide technical decisions, contributing to the advancement of our SaaS solutions and platform evolution.Collaborate with a diverse, cross-functional team and proactively suggest improvements.Uphold code and architectural excellence through code reviews, best practices in the software development lifecycle, and automation.Ensure quality by writing unit, integration, and end-to-end tests; and drive observability and performance metrics.Participate in on-call rotations to maintain system reliability and availability.

About UsAt Ruby Labs, we are at the forefront of technology, developing and managing cutting-edge consumer products across the health, education, and entertainment sectors. Our teams are passionate about innovation and are dedicated to creating products that enhance the lives of consumers. We invite you to explore our journey and learn more about us at: https://rubylabs.com/about-us/About the RoleWe are on the lookout for a creative and driven Senior Performance Creative to elevate our marketing initiatives at Ruby Labs. In this full-time position, you will play a pivotal role in shaping our advertising strategies for multiple consumer-centric brands. Your responsibilities will include crafting compelling ad concepts, overseeing production schedules, and collaborating with cross-functional teams to ensure our creatives both engage and convert. You will report directly to the Ad Creative Lead and work closely with User Acquisition Managers to refine our advertising strategies based on performance insights.Key ResponsibilitiesCreative Development:Lead the brainstorming and conceptualization of innovative ad creatives that connect with diverse audiences, focusing on strategies that boost customer acquisition.Stay informed on market trends to incorporate cutting-edge elements into our creative production, ensuring our outputs are captivating and drive conversions.Collaborate with design teams to transform concepts into impactful ad creatives that align with brand identity and campaign objectives.Project Management:Manage the production workflow to ensure timely delivery of all projects while maintaining the creative vision, particularly in enhancing customer acquisition impact.Coordinate with designers, user acquisition managers, and other stakeholders to facilitate smooth operations and high-quality results.Performance Analysis:Work in tandem with User Acquisition Managers to evaluate the performance of ad creatives across various platforms, identifying successful strategies and areas for improvement.