Product Data Scientist for Enhanced Search Quality

Join Perplexity as a Product Data Scientist, where you will play a pivotal role in advancing our cutting-edge search technologies. Your expertise in analyzing user behavior will be instrumental in extracting valuable insights from A/B testing data, enabling us to refine our products and enhance user satisfaction.Key ResponsibilitiesGenerate actionable data-driven insights from user interactions to shape our product strategy and promote user adoption.Develop and validate hypotheses by designing, executing, and interpreting A/B testing methodologies.Identify key performance metrics and create visual dashboards for effective tracking and reporting.Architect new data pipelines to enhance ranking quality, including the discovery of new signals, metric production, and the development of data labeling pipelines utilizing human and LLM feedback.

Join Perplexity as a Search Quality Analyst and help us enhance our advanced search technologies. We are seeking a skilled data analyst who will leverage user behavior insights to optimize our A/B testing processes and improve our product offerings. This role involves identifying critical signals in user interactions and transforming data into actionable insights.Key ResponsibilitiesCreate data-driven insights from user interactions to guide our product strategy and boost user engagement.Develop and test hypotheses through the design, execution, and analysis of A/B tests.Define key performance metrics and visualizations for ongoing tracking and present them through interactive dashboards.Innovate new data pipelines to enhance search ranking quality, including discovering new signals, generating metrics, and creating data labeling frameworks that incorporate both human and LLM feedback.Required QualificationsMinimum of 4 years of experience in data analysis or a related field.Proven experience with search-related products, focusing on online metrics and A/B testing analysis.Strong proficiency in Python, with the capability to produce production-grade code.Expertise in SQL for data manipulation and analysis.Familiarity with Business Intelligence (BI) tools for data visualization.Solid understanding of statistical concepts and methodologies.Preferred QualificationsExperience with Apache Spark for big data processing.Familiarity with Databricks for collaborative data science.Experience in developing LLM-as-a-judge systems to enhance analytics.

Join Perplexity as a Search Machine Learning Engineer Intern and contribute to the development of cutting-edge search technologies focused on retrieval and ranking. Collaborate with seasoned engineers to enhance search quality, experiment with innovative models, and deploy features that significantly affect user interactions with information discovery.Our internship program spans 12 to 24 weeks, requiring full-time, in-person attendance at our Belgrade office.Key Responsibilities:Participate in experiments aimed at enhancing search quality through advanced models, optimized data utilization, and effective evaluation tools, under the mentorship of senior engineers.Design and develop components of our search platform and model stack, including retrieval, ranking, and classification models.Train and evaluate models, including those based on LLM approaches, for various tasks related to retrieval, ranking, and classification.Assist in the deployment and monitoring of search and ranking models to ensure scalability and performance.Contribute to the development and iteration of RAG pipelines for grounding and answer generation.Collaborate with Data, AI, Infrastructure, and Product teams to quickly implement improvements while learning best practices in production machine learning.

At Perplexity, we are seeking a talented Senior or Expert C++ Developer to become an integral part of our dynamic Search Core team. This pivotal role involves shaping the future of our search technologies and products. You will influence major architectural, design, and implementation decisions that define our technical infrastructure.Key ResponsibilitiesDesign and develop innovative search index storage solutions that encompass both streaming and batch data processing systems, optimized for high-load environments with the capacity to manage billions of web pages.Create foundational core search components, including advanced algorithms for efficient data retrieval and ranking.Maximize hardware performance to ensure optimal system functionality.Address complex challenges related to multithreading, concurrency, and optimization at the system level.Enhance subsystems to ensure reliable and consistent data replication within the core search architecture.Required QualificationsA minimum of 5 years of hands-on experience in C++ programming.Familiarity with Python or other scripting languages.A strong commitment to writing clean, efficient, and scalable C++ code.In-depth knowledge of algorithms and data structures with practical application skills.Comprehensive understanding of multithreading, including various strategies, challenges, and trade-offs.Experience in developing high-load, distributed, and hardware-related services.Expertise in real-time systems development.Preferred QualificationsExperience in building core components for search engines, trading systems, or database management systems.Proficiency with cloud services, Kubernetes (k8s), and AWS infrastructure.

Role Overview Aghanim is looking for a Product Data Analyst in Belgrade to help strengthen our payments product. This role centers on analyzing user behavior in the payment funnel and using those insights to improve conversion. Expect to work with large volumes of transactional data, tracing user journeys from checkout through to completed payments. The goal: identify friction points, understand their impact, and support product decisions with clear, actionable recommendations. About Aghanim We build payment infrastructure for gaming companies and process millions of transactions worldwide every month. Even small improvements in conversion rates can have a significant effect on client revenue, making your work directly impactful. What You Will Do Product Analytics and Funnel Optimization Measure conversion rates at each stage of the payment funnel, from checkout start to successful payment. Pinpoint where users drop off and assess how these points affect performance. Spot opportunities to streamline user flow, reduce friction, and improve conversion. Experimentation and A/B Testing Work with product teams to design and run A/B tests. Set up hypotheses, define metrics for success, and create testing plans. Review outcomes and present data-backed recommendations. Reporting and Insights Build and maintain dashboards that track product performance and conversion trends. Prepare structured reports to monitor key metrics and spot shifts over time. Translate analysis into practical insights for product development. Cross-functional Collaboration Work closely with product and engineering teams to support data-driven decisions. Lead discussions on product strategy and improvements based on your findings.

At Perplexity, we are on the frontier of innovative search solutions, and we are looking for a talented Senior Machine Learning Engineer to join our dynamic team in Belgrade. Your expertise will play a pivotal role in developing the next generation of sophisticated search technologies, particularly in the areas of retrieval and ranking.Key ResponsibilitiesDrive continuous improvement in search quality using models, data, and advanced tools.Design and implement foundational components of our search platform and model architecture.Train and assess retrieval, ranking, and classification models, including Large Language Models (LLMs).Deploy models, ranging from boosting algorithms to LLMs, ensuring scalability and performance.Develop and refine Retrieval-Augmented Generation (RAG) pipelines for enhanced grounding and answer generation.Collaborate with cross-functional teams, including Data, AI, Infrastructure, and Product teams, to deliver high-quality results swiftly.Required QualificationsStrong grasp of search and retrieval systems, including principles of quality evaluation and associated metrics.Demonstrated success in working on large-scale search or recommendation systems.Self-motivated with a profound sense of ownership and execution.At least 5 years of relevant experience in search or recommendation system projects.

Become a part of Perplexity AI as a Search Golang Engineer and play a crucial role in shaping the future of highly scalable, AI-driven search infrastructure. In this dynamic position, you will utilize your expertise in Golang to create, implement, and manage backend systems capable of efficiently processing millions of queries with unparalleled reliability.Responsibilities:Develop robust and scalable distributed backend services utilizing Golang.Design, enhance, and sustain search infrastructure to accommodate rapid traffic increases.Create cloud-native solutions focusing on horizontal scalability and quick failover capabilities.Establish comprehensive monitoring, autoscaling, and incident recovery mechanisms.Work closely with product, infrastructure, and DevOps teams to optimize throughput and system resilience.Lead improvements in CI/CD processes, automation, and operational excellence for backend systems.Mentor fellow engineers and advocate for scalable design principles throughout the organization.

Join the dynamic team at Perplexity AI as a Search Rust Engineer, where your expertise will drive the evolution of AI-powered search technologies. In this role, you will focus on optimizing every aspect of our search performance, ensuring that our systems are robust, scalable, and reliable.As a key player, you will:Design and enhance ultra-low-latency search infrastructure utilizing Rust programming.Profile and instrument services to continuously reduce response times as we scale.Develop and sustain distributed backend components that drive real-time search and retrieval.Work closely with product and infrastructure teams to craft systems that achieve exceptional query performance.Leverage advanced concurrency, memory management, and network programming techniques for optimal throughput.Monitor and fine-tune production workloads to maintain reliability under high traffic conditions.Participate in code reviews and mentor peers in high-efficiency Rust development practices.

Easygo, a leading Australian technology firm, powers globally recognized brands such as Stake, KICK, and Twist Gaming. As we expand our engineering capabilities in Belgrade, we are seeking a Senior Software Quality Engineer to join our Data and Integration Infrastructure team. This is an exciting opportunity to influence the platforms and systems that drive our products worldwide. About the Team You will become part of a dynamic engineering team that accelerates product and service teams working on KICK. The team is tasked with creating and maintaining shared platform capabilities that enhance the reliability, consistency, and developer experience across the platform. Our team is responsible for foundational components such as event pipelines, schema governance, service gateways, and notification delivery. These systems ensure reliable communication between KICK's services, with accurate, observable, and analytics-ready data flows across the platform. By delivering robust and well-architected platform primitives and templates, we play a pivotal role in shaping how KICK is developed and scaled, optimizing workflows, minimizing redundancy, and establishing a solid foundation for reliable integrations and data-driven decision-making. Who We’re Looking For We are in search of a seasoned Senior Quality Engineer to guarantee the reliability, scalability, and safety of KICK's core platform systems. This role involves collaborating closely with engineers to integrate quality practices throughout the development lifecycle, ensuring that platform components—like event pipelines and service gateways—are robust, testable, and safe for use by teams across KICK. If you are driven by the desire to enhance system reliability, facilitate rapid and assured software delivery, and thrive in a collaborative, high-impact engineering environment, this position offers a chance to shape the quality foundations of the KICK platform. Key Responsibilities: Integrate quality practices within Agile product teams while implementing the broader QA strategy across the SDLC. Work closely with developers, product managers, and designers to establish acceptance criteria, refine testability, and maintain a unified understanding of quality objectives. Engage in code reviews and technical design discussions, providing insights on testability, risk, and quality impact early in the development cycle. Identify testing risks and devise appropriate testing strategies for critical system components.

Role overview Ergomed seeks a Senior Quality Assurance Manager to lead its Quality Assurance department in Belgrade. This leadership role ensures compliance with industry standards and regulatory requirements, supporting the company's focus on high standards in both pharmacovigilance and quality assurance. Main responsibilities Develop, implement, and monitor quality assurance processes and systems. Collaborate with teams throughout the company to drive continuous improvement. Ensure all activities align with current industry standards and regulatory requirements. Impact of the role The Senior Quality Assurance Manager shapes the quality culture at Ergomed. This position plays a central role in maintaining excellence as the company grows, ensuring high standards and supporting effective pharmacovigilance operations. Location This position is based in Belgrade.

Join Acumatica as a Quality Assurance Engineer Intern and become an integral part of our dynamic research and development team. You will collaborate with talented professionals to design and implement scalable, production-grade cloud-based ERP, CRM, and other web applications leveraging Microsoft technologies (.NET, C#, MS SQL Server) for clients worldwide. This summer internship spans 3 months, requiring a commitment of 40 hours per week. You will be based in our Belgrade office located at Skyline Afi Tower (Kneza Miloša 88a, Skyline offices, building C (the tallest tower), 2nd floor).Your Responsibilities:Contribute to Test Design, Test Case preparation, and Test Data creation.Conduct manual testing of new features.Analyze and enhance test coverage.Develop and maintain automated tests.Execute automated regression tests and analyze results.Perform issue analysis and reporting.Technologies, Tools, and Environment:Automation Tools: Selenium WebDriver, C#.Source Control System: GIT/STASH/BAMBOO;Bug Tracking System: JIRA;Database Management Tools: MS SQL/MySQL.

Role overview Xsolla seeks a Lead Quality Assurance Engineer based in Serbia. This role guides quality assurance activities to help ensure software products meet high standards for both quality and performance. What you will do Oversee quality assurance processes for software releases Apply established testing methodologies to maintain product quality Collaborate with developers and product managers to shape testing strategies Support improvements to development and QA workflows Lead and mentor members of the QA team Requirements Background in software quality assurance and testing methodologies Demonstrated leadership skills within QA or engineering teams Ability to work collaboratively across engineering and product functions

Rivian and Volkswagen Group Technologies combine the strengths of two major automotive players to build technology for electric vehicles. Their joint team develops everything from operating systems to cloud connectivity, aiming to advance software-defined vehicles on a global scale. With a strong background in connectivity, artificial intelligence, and security, the company is shaping a more intelligent and connected future for mobility. Role overview This Software Engineering Intern - Quality Assurance position is part of the Navigation and Mapping Quality Assurance team in Belgrade. The internship focuses on testing advanced mapping software that supports electric vehicles. Both manual and automated testing methods are used to maintain high software standards. What you will do Test new and existing mapping software features to help ensure quality Identify software issues and confirm that fixes resolve them Work with teams from different disciplines to deliver dependable solutions Requirements This role suits candidates interested in software testing and quality assurance for automotive technology. Collaboration and attention to detail are important for success in this internship.

Join Gambling.com Group (Nasdaq: GAMB), a leader in the online gambling industry, renowned for our award-winning marketing and sports data services. Our extensive portfolio includes prominent websites, such as Gambling.com and Bookies.com, along with iGaming-focused platforms like Casinos.com, BonusFinder.com, and Freebets.com.As our data ecosystem undergoes rapid transformation, we are on the lookout for a skilled Senior Data Architect to guide the evolution of our data infrastructure. This is your opportunity to develop scalable and efficient systems that offer profound insights into player interactions, financial reporting, and cross-sectional business analytics.Role Overview:In your role as a Senior Data Architect, you will lead the redesign and reconstruction of our data architecture, catering to the specific requirements of our business teams. You will transition from traditional manual file processes to a sophisticated, automated ETL pipeline, leveraging a Medallion architecture (comprising Bronze, Silver, and Gold layers) integrated with a Hub-Spoke model for centralized data management and distributed accessibility. Your expertise in technologies such as Snowflake and Airflow will ensure seamless data ingestion from varied sources, encompassing finance, operations, and other business verticals. Our aim is to forge a unified perspective of player and operator interactions across multiple sites, empowering advanced analytics, reporting, and strategic decision-making.Key Responsibilities:Lead the comprehensive redesign of existing data architecture, migrating from manual file handling to a robust, scalable system utilizing Medallion architecture principles for data layering and quality assurance.Design and implement a Hub-Spoke model to centralize core data assets (e.g., player and operator profiles) while facilitating spoke systems for vertical-specific analytics, ensuring data consistency and accessibility.Revamp ETL processes using Airflow for orchestration, automating data pipelines to handle ingestion from various sources, including real-time player activity, operator metrics, and cross-site journeys.Construct pipelines for data ingestion from all business verticals (e.g., finance, marketing, operations), delivering comprehensive reporting for finance teams and expanding support for holistic player/operator views.Focus on architecting iGaming-specific solutions centered on player and operator data, monitoring journeys across sites, ensuring compliance with industry regulations, and enabling personalized recommendations.Optimize the use of Snowflake for data warehousing, applying best practices to enhance performance and scalability.

Join our dynamic team at BlueCat Networks as a Senior Quality Assurance Specialist. In this role, you will play a pivotal part in ensuring the highest quality of our software solutions. You will work closely with development teams to identify, document, and resolve defects, while also participating in the design and execution of test plans.Your expertise will help us deliver robust and reliable products to our customers, enhancing their experience and satisfaction with our services.

JetBrains has built developer tools since 2000, focusing on efficiency and automation to help engineers work smarter. The JetBrains Cloud Platform (JCP) team develops cloud services that let organizations manage JetBrains products, track AI usage, and handle billing in one place. Role overview The Performance Quality Assurance Engineer (JCP Core) will help strengthen the reliability and scalability of distributed systems at JetBrains. This role centers on performance testing and analysis to make sure the platform remains stable as it grows. Locations Belgrade, Serbia Berlin, Germany Limassol, Cyprus Madrid, Spain Munich, Germany Paphos, Cyprus Prague, Czech Republic Warsaw, Poland Yerevan, Armenia What you will do Design and execute performance tests for cloud-based and distributed systems Analyze results to identify bottlenecks and stability issues Work with the JCP team to improve system reliability and scalability This position offers the chance to contribute to the core of JetBrains’ cloud platform, supporting the adoption of AI-driven development tools across organizations.

Acumatica is looking for a Senior Quality Assurance Engineer to join the Frontend Development Team in Belgrade. This position focuses on upholding high quality standards for software products through careful testing and collaboration. Role overview The Senior Quality Assurance Engineer works alongside developers and product managers to find and resolve bugs, improve performance, and support a smooth user experience. Attention to detail and a proactive approach are essential in this role. What you will do Test frontend software to identify issues and verify fixes Work with team members to address bugs and suggest improvements Contribute to optimizing application performance Help maintain a high level of customer satisfaction through quality releases Requirements Experience in quality assurance for frontend software Strong collaboration skills with developers and product managers Commitment to delivering reliable and user-friendly solutions

As a Data Partnerships Manager at Telesign, you will play a pivotal role in managing and enhancing our partnerships with data providers. You will be responsible for identifying opportunities to expand our data ecosystem, negotiating agreements, and ensuring the seamless integration of data solutions that drive business growth and customer satisfaction.

Lifted An Upwork Company is hiring a Serbian Audio Transcription & Quality Assurance Specialist in Belgrade. This position centers on transcribing Serbian audio content and checking the accuracy of completed transcripts. Role overview This specialist will handle both audio transcription and quality assurance tasks. The work involves listening to audio recordings, converting them into written form, and reviewing transcripts for correctness and consistency. Collaboration with team members is a regular part of the job to maintain high standards for client deliverables. What you will do Transcribe Serbian audio files into clear, accurate text Review and verify transcripts to ensure they meet required quality levels Work with colleagues to address feedback and maintain consistency across projects

Role Overview GoDaddy is hiring a Product Manager based in Serbia. This role shapes product direction and helps entrepreneurs and businesses thrive online. The Product Manager works closely with teams across engineering, design, and business to set product vision, choose priorities, and guide delivery. What You Will Do Define and communicate product vision in partnership with cross-functional teams Prioritize features and initiatives that improve user experience Collaborate across groups to deliver products that meet business goals Contribute insights that influence the product roadmap and strategy Location This position is based in Serbia.