Search Machine Learning Engineer Internship

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 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.

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 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.

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.

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 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 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 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.

Rivian and Volkswagen Group Technologies have partnered to advance automotive software for electric vehicles. Drawing on expertise from both companies, the joint venture focuses on operating systems, zonal controllers, and cloud connectivity. The goal is to create software-defined vehicles that set new benchmarks for the industry. The collaboration emphasizes secure, connected, and intelligent solutions, aiming for a more sustainable future in mobility. Internship Focus The Infotainment team is looking for an Android Embedded Software Engineering Intern based in Belgrade. This role centers on building digital experiences for in-vehicle systems. Interns will contribute to the design and development of Android applications that enhance the electric vehicle experience. What you will work on Design and develop user-focused Android applications for infotainment systems Contribute to key features such as the Navigation application, supporting the customer journey in electric vehicles Prioritize quality, reliability, and performance throughout the Android development process

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.

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.

About the CompanyJoin a pioneering SaaS company that is transforming data privacy and security for enterprises globally. With a strong foothold in the market and partnerships with Fortune 100 companies, our client is at the forefront of privacy technology, leveraging AI, machine learning, and advanced analytics to shape the future.The MissionOur client is dedicated to fostering a better society by promoting robust data protection legislation, diligently safeguarding customer data, upholding individual privacy rights, and building trust between businesses and their clients through increased transparency.The OpportunityAs a Remote Full Stack Developer (PHP), you will be responsible for designing and developing scalable SaaS solutions that secure user data and streamline compliance for enterprise clients around the world. Working closely with technical leads and the executive team, you will have the freedom to impact technical choices, spearhead feature development, and contribute to innovative products that are redefining the privacy sector.What You'll DoDevelop secure, high-performance web applications and APIs using JavaScript, React, and Node.jsCreate efficient algorithms and enhance applications for high-traffic SaaS environmentsImprove application performance, security, and browser compatibilityCollaborate with a distributed engineering team to deliver key features on tight deadlinesLead the technical implementation of complex interfaces and influence architectural decisionsFoster a culture of continuous learning, innovation, and knowledge sharingWhat You BringBachelor's degree in Computer Science or a related field (mandatory)4+ years of experience as a Full Stack Developer or with JavaScript/React/Node.jsStrong knowledge of object-oriented programming and proficiency in Linux command lineExperience building scalable, load-balanced web applications and RESTful APIsAbility to thrive in fast-paced, small team environments with competing prioritiesSolid expertise in Java, PHP, C++, or C, along with frontend frameworks (ReactJS, jQuery, Bootstrap)

Join ennovationHUB, a dynamic and expanding international e-commerce group, specializing in home and living products, particularly furniture. With operational hubs in Belgrade, London, and Barcelona, we cater to diverse markets across the UK, North America, Europe, and APAC through tailored e-commerce platforms.We are seeking a passionate Graphic Design Intern to become a key member of our creative team in Belgrade. This internship is designed for hands-on learning, where you will immediately engage with real projects that impact our paid advertising and e-commerce initiatives. This is your chance to witness the effectiveness of your designs in a practical setting and contribute to meaningful outcomes.You will work closely with the brand owner, art director, marketing manager, and the broader team, gaining valuable experience throughout the creative process. This internship emphasizes skill development, attention to detail, and a deepening understanding of commercial design within a fast-paced atmosphere.We are looking for a creative thinker who is detail-oriented and genuinely curious about the design process—someone who is eager to learn, experiment, and grow through practical experience.Key ResponsibilitiesDesign lifestyle interiors—create living rooms, dining spaces, and styled environments using our products while collaborating with the brand owner and art director.Develop ad creatives for Meta—transform interior visuals into cohesive ads by designing layouts, integrating text elements, and thoughtfully applying typography.Ensure visual consistency—maintain brand integrity across all creative outputs, from product images to paid social media content.Utilize AI generation tools—leverage tools like ChatGPT, Flow, Gemini, and others in your creative workflow.Collaborate effectively—coordinate with the art director, marketing manager, and fellow marketing team members on various projects.

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.

Rivian and Volkswagen Group Technologies brings together two major automotive innovators to shape the future of software-defined vehicles. The team focuses on advanced operating systems, zonal controllers, and cloud connectivity, aiming to raise the bar for electric vehicle technology worldwide. Collaboration draws on deep experience in connectivity, artificial intelligence, and security to deliver vehicles that are smarter, more connected, and more sustainable. Role overview The Software Engineering Intern - Connected Systems will work on distributed systems that power in-vehicle features and link them to the Cloud Gateway and its supporting infrastructure. This role involves helping design, develop, and maintain core services that ensure these systems operate reliably and efficiently. What you will do Support the development and upkeep of distributed systems for connected vehicles Assist in designing and building core services that enable in-vehicle and cloud communication Contribute to efforts that keep these systems stable and reliable Location This internship 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.

Rivian and Volkswagen Group Technologies brings together two automotive leaders focused on shaping the future of mobility. This partnership emphasizes electric vehicle advancements, operating systems, connectivity, and intelligent solutions. The combined team works to improve how vehicles and systems connect, use artificial intelligence, and maintain security, all with the goal of creating smarter and more sustainable transportation. Role overview The Data Engineering Intern - Analytics and AI will join an engineering group responsible for building and refining the data infrastructure behind analytics, AI projects, and operational insights. This internship blends data engineering, analytics, and applied AI, offering hands-on experience with production-scale datasets and cloud-based analytics platforms. The team focuses on creating reliable data pipelines, developing analytical models, and automating workflows using modern AI tools. What you will do AI-driven analytics development: Apply AI tools to design intelligent scenarios that make complex data requests easier, enabling teams to answer key business questions quickly. Creation of intelligence playbooks: Develop and document playbooks for recurring data needs, setting standards for analysis and data audits with AI-based methods. Pipeline engineering: Build and maintain ELT pipelines using Python and SQL to support core AI-driven processes. Analytics engineering: Help create data models that convert raw telemetry into clean, usable datasets, providing a trustworthy source of truth. System and performance optimization: Monitor and improve data platforms to ensure they remain reliable and efficient for delivering insights. Collaboration: Act as a technical bridge between Engineering and Analytics teams, supporting communication and teamwork. Location This internship is based in Belgrade.

Join the Acumatica team as an Intern Developer, where you'll play a pivotal role in creating innovative, production-grade cloud-based ERP, CRM, and web applications using Microsoft technologies such as .NET, C#, and MS SQL Server. This summer internship (3-month contract, 40 hours per week) is a fantastic opportunity to work alongside experienced developers in our Belgrade office, located in the Skyline Afi Tower (Kneza Miloša 88a, Skyline offices, building C, the tallest tower, 2nd floor).Key Responsibilities:Contribute to the design and development of business applications and customizations.Develop data access layers, business objects, and presentation layers.Research and prototype ERP modules utilizing emerging technologies.Support existing code through optimization and refactoring.Analyze code to identify and rectify errors in functionality.Provide guidance and support to developers within Acumatica’s development network.