Search Quality Analyst at Perplexity | Belgrade

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.

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.

JetBrains is seeking a Senior Machine Learning Researcher to focus on Spectrum. This position centers on applying machine learning expertise to improve product features and contribute to ongoing research efforts. Role overview This role involves working with a team dedicated to advancing the capabilities of Spectrum. The Senior Machine Learning Researcher will use their knowledge to influence product direction and participate in research projects that drive innovation. Key responsibilities Apply machine learning methods to enhance Spectrum's technology. Contribute to research initiatives that inform future product development. Share insights and provide leadership within the research team. Locations This position is available in Amsterdam, Belgrade, Berlin, Limassol, Madrid, Munich, Paphos, Prague, Warsaw, and Yerevan.

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.

Join Databricks as a Senior Applied ML/AI Engineer, where you will leverage cutting-edge machine learning and optimization algorithms to enhance the functionality and performance of our AutoML products and other user-facing solutions. Your expertise will drive advancements in classification, regression, forecasting, and recommendation systems, utilizing both traditional methods and deep learning techniques. The Applied ML/AI team tackles some of the most challenging and fascinating issues businesses face today, aiming to maximize the efficiency and effectiveness of Databricks’ infrastructure and products.Your Impact:Collaborate within a small, skilled team of engineers and data scientists to build features and implement end-to-end systems.Influence the direction of our applied ML initiatives by partnering with engineering and product teams across the organization.Lead the design and deployment of advanced ML/AI models and systems that enhance Databricks’ product capabilities and operational performance.Create and maintain robust, scalable ML infrastructure, including components for model training and serving, ensuring seamless integration of AI/ML solutions into production environments.Research and develop innovative modeling techniques in machine learning for forecasting.Engage with the broader AI community through conference presentations and contributions to open-source projects, establishing Databricks as a leader in the industry.

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.

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 our dynamic team at SMG Swiss Marketplace Group as an AI Engineer. In this pivotal role, you will leverage cutting-edge technologies and methodologies to develop and implement AI solutions that drive innovation and enhance user experiences. You will work collaboratively with cross-functional teams to analyze complex data, design algorithms, and create intelligent systems that solve real-world problems.

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.

Become a vital part of our Automotive team and contribute to the evolution of a cutting-edge platform that drives next-generation digital mobility solutions. As a Senior Backend/Platform Engineer, you will be tasked with designing and developing scalable, high-performance backend systems that cater to millions of users and intricate automotive ecosystems. If you have a passion for clean architecture, platform innovation, and developing impactful systems, we would love to connect with you.Your ResponsibilitiesCollaborate with a dynamic cross-functional team to deliver meaningful product increments.Design and implement production-ready Java services adhering to established engineering standards and best practices.Engage in architectural decisions and technical dialogues, influencing the development of our backend and platform capabilities.Manage the production operation and monitoring of backend systems.Enhance and maintain systems in cloud-native environments, specifically AWS and Kubernetes.Focus on improving the reliability, scalability, and maintainability of our platform continuously.Contribute to CI/CD pipelines and infrastructure configuration relevant to backend services.Mentor team members and support their technical development proactively.

Tenstorrent is at the forefront of groundbreaking AI technology, setting new benchmarks for performance, usability, and cost-effectiveness. As AI reshapes the computing landscape, our solutions are designed to integrate advancements in software models, compilers, platforms, networking, and semiconductors. Our talented team has crafted a high-performance RISC-V CPU from the ground up and is united by a shared enthusiasm for AI and a commitment to creating the premier AI platform. We cherish collaboration, curiosity, and a relentless drive to tackle complex challenges. We are expanding our team and are on the lookout for contributors at all experience levels.Become a part of our Inference Server Technologies team, where we create software that drives cutting-edge AI inferencing on Tenstorrent’s innovative hardware. Our team focuses on building the layer that operates on top of Tenstorrent's ML libraries—designing APIs, deploying workloads, and benchmarking end-to-end inference speed. You will play a crucial role in shaping how developers engage with and scale model execution on Tenstorrent’s infrastructure.This role is hybrid based in Belgrade, Serbia.We encourage candidates of all experience levels to apply. During the interview process, we will evaluate candidates for the appropriate level, and offers will be tailored accordingly.

At Tenstorrent, we are at the forefront of pioneering AI technologies that are reshaping performance benchmarks, user experience, and cost-effectiveness. In this new era of AI-driven computing, our solutions must adapt to integrate advancements in software models, compilers, platforms, networking, and semiconductors. Our innovative team has successfully developed a high-performance RISC-V CPU from the ground up, fueled by our enthusiasm for AI and a strong commitment to crafting the premier AI platform. We appreciate collaboration, curiosity, and the desire to tackle complex challenges. As we expand our team, we invite contributors of all experience levels to join us.In the realm of next-generation AI computation, our Kernel Development and Optimization team focuses on creating the essential performance-critical kernels that fully utilize our hardware capabilities for ML and HPC tasks.This position is hybrid, based in Belgrade, Serbia.We encourage applicants with a range of experience levels. During the interview process, we will evaluate candidates to match them with the appropriate level, which may vary from this posting.

At Perplexity, we are in search of a passionate Backend/Infrastructure Engineer Intern to join our dynamic and impactful team dedicated to enhancing our search capabilities. This role presents a unique opportunity to collaborate with seasoned engineers in designing, building, and maintaining the robust infrastructure and backend services that ensure Perplexity remains fast, reliable, and scalable.Internship Duration: 12 - 24 weeks, full-time, in-person at our Belgrade office.Key Responsibilities:Construct and uphold infrastructure that drives high-performance search systems, with guidance from senior engineers.Design and implement internal tools and automation to enhance developer workflows and operational productivity.Aid in the design, deployment, and monitoring of cloud-native systems utilizing AWS.Contribute to the optimization of CI/CD pipelines, testing infrastructure, and release processes.Debug and enhance Linux-based services, containers, and backend systems.Participate in coding for products, primarily utilizing Rust, Go, or C++.Qualifications:Currently pursuing a degree in Computer Science, Engineering, or a related field, or possess equivalent practical experience.Familiarity with at least one programming language such as Go, Rust, or C/C++, gained through academic coursework or personal projects.A basic understanding or exposure to cloud infrastructure (e.g., AWS) and Linux systems is advantageous, though not mandatory.A keen interest in infrastructure, distributed systems, or backend engineering, along with a willingness to learn about CI/CD, monitoring, and performance optimization.A proactive, inquisitive learner who thrives in a fast-paced, innovative setting.

Key Responsibilities: Lead, mentor, and cultivate the Learning & Development (L&D) team to ensure exceptional performance and career advancement. Design and implement engaging, contemporary learning solutions utilizing innovative methods such as gamification, blended learning, and digital tools. Direct the assessment and reporting of L&D effectiveness, monitoring critical KPIs and offering actionable insights to guide strategic planning. Manage and enhance the utilization of digital learning platforms, Learning Management Systems (LMS), and content development technologies to optimize efficiency and enhance learner experiences. Advocate for industry best practices and ensure the team remains informed about emerging trends and innovations in the L&D sector. Establish comprehensive processes and standards to uphold the consistency and quality of all training materials and delivery methods. Develop and sustain strong partnerships with external teams and stakeholders to address specialized learning needs. Encourage collaboration across departments to align learning programs with broader business objectives and change management initiatives. Identify and pursue opportunities for digital transformation within the L&D function, exploring new tools and platforms to scale learning solutions throughout the organization. Foster a feedback-oriented learning culture by implementing regular assessments, surveys, and post-training evaluations to drive ongoing improvement.

Join easygo, an innovative Australian technology leader behind renowned brands such as Stake, KICK, and Twist Gaming. As we expand our engineering operations in Belgrade, we are seeking a Senior Full Stack Engineer to become an integral part of our Internal Empowerment team. In this role, you will contribute to the creation and enhancement of the platforms that power our global products.About the TeamYou will be part of a newly established engineering team that is responsible for developing and maintaining internal platforms, services, and integrations, ensuring that Easygo teams can function effectively and at scale.Your team will manage essential internal systems and represent Easygo's digital front door, minimizing reliance on external resources and eliminating delivery bottlenecks for operational teams. By overseeing these platforms from concept to execution, your team plays a crucial role in facilitating business operations and ensuring that Easygo's technology and online presence embody the innovation within the company.Who We’re Looking ForWe are in search of a Senior Full Stack Engineer who is passionate about ownership, collaboration, and problem-solving in a way that empowers teams across the organization.You are a seasoned engineer who prides yourself on creating high-quality, scalable systems across the tech stack and can communicate effectively with a wide range of technical and non-technical stakeholders. You flourish in an environment that values autonomy, accountability, and teamwork.You are adept at working across the stack—designing and developing backend services and APIs, while also collaborating closely with frontend engineers to contribute to user-facing functionalities as necessary.Additionally, you are comfortable navigating various problem domains over time, adapting to new technical contexts as business priorities evolve. You tackle challenges pragmatically, striving to understand the business needs behind technical requests and selecting solutions based on context rather than applying a one-size-fits-all methodology.Key ResponsibilitiesDesign and implement high-performance software solutions in line with project requirements and company standards.Build and maintain solutions with a strong emphasis on code quality, scalability, and long-term maintainability.Enhance the performance, reliability, and resilience of existing services by addressing bottlenecks and technical debt.Own services from inception to delivery, ensuring high standards of quality, security, and operational readiness.Collaborate closely with cross-functional teams to deliver optimal solutions.

About UsAt Rho, we're redefining banking for startups. Our innovative platform allows businesses to open accounts in mere minutes, issue cards, manage expenses, pay bills, and maintain financial records—all in one seamless experience supported by dedicated human assistance.About the RoleWe are seeking a skilled Senior Software Engineer with a focus on backend development to join our talented core product team in Belgrade. You will play a pivotal role in enhancing and scaling Rho's comprehensive finance platform.If you are passionate about technology and eager to expand your knowledge, you'll be working with the following tech stack:Python and GoGraphQLPostgreSQLDockerKubernetesGoogle Cloud Platform (GCP)

Role overview Tide is looking for a Senior Flutter Engineer based in Serbia to help create mobile applications that make financial management simpler for users. The position centers on designing, developing, and maintaining apps with Flutter, with an emphasis on usability and reliability. What you will do Collaborate with cross-functional teams during all stages of app development Design and implement new features using Flutter Maintain and enhance existing mobile applications Prioritize delivering effective user experiences Location This role is located in Serbia.

Overview Join our dynamic team at Telesign as a Senior OpenShift Engineer! We are seeking a passionate professional to lead our migration to the OpenShift platform and drive infrastructure excellence. Key Responsibilities Collaborate with business stakeholders to gather requirements and design innovative solutions that meet engineering standards and business objectives. Architect, implement, and manage Red Hat OpenShift clusters in both physical and virtualised on-premises environments. Take charge of systems engineering projects tied to OpenShift infrastructure. Partner with development teams to containerize applications, enhancing deployment and release processes. Create and maintain robust CI/CD pipelines utilizing OpenShift and related DevOps tools. Automate deployment and operational tasks with Ansible and other scripting tools. Execute patching and upgrades for OpenShift clusters, ArgoCD, GitLab CI, and associated components, adhering to change-management protocols. Design and maintain strategies for backup, disaster recovery, and redundancy. Participate in on-call/standby rotation to support critical platform and infrastructure services, ensuring service continuity. Oversee daily operations, including trend analysis, root cause analysis, monitoring, and troubleshooting to maintain high availability and reliability. Implement security best practices, including RBAC, vulnerability management, and compliance controls. Enhance alerting, monitoring, and observability across OpenShift and related systems. During downtime of OpenShift-related tasks, perform general system administration, including Linux server administration and infrastructure maintenance. Develop and maintain comprehensive documentation, including architecture diagrams, operational procedures, and runbooks. Facilitate knowledge transfer, mentoring, and training sessions for colleagues on OpenShift, GitLab, and associated infrastructure technologies.

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.