Senior Machine Learning Researcher - Spectrum

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 wi…

At SAP Fioneer, innovation is at the heart of our mission. We emerged from SAP with a commitment to agility, pioneering technology, and exceptional delivery.We leverage our extensive technological heritage and deep insights into corporate and consumer needs to redefine financial services with cutting-edge software solutions and platforms.By empowering financial services companies, we enable them to achieve unprecedented speed, scalability, and cost-effectiveness through digital transformation, cloud technologies, and comprehensive solutions that streamline banking and insurance processes.As a rapidly growing global entity with a culture of innovation and a lean organizational structure, SAP Fioneer is where your career can flourish!Job LocationIn this role, you can work remotely from anywhere in Serbia or opt to work from our Belgrade offices (Airport City), depending on your preference. We welcome candidates residing in Serbia or those open to relocating.About the RoleWe are seeking a seasoned SAP Developer to join our dynamic team, taking on diverse and challenging responsibilities, including:Developing and enhancing state-of-the-art software solutions for the banking sector utilizing ABAP and advanced SAP technologiesContributing to our premium product portfolio by implementing innovative features leveraging modern capabilities (e.g., Virtual Accounts)Translating business needs into sophisticated software designs and modern architecturesCreating top-tier standard software in an agile environment, collaborating closely with our product team and international banking clientsMaintaining high product quality through rigorous testing and quality assuranceAssisting clients in software implementation by delivering exceptional customer-centric services

About Unlimit Unlimit is a pioneering global fintech ecosystem designed to dismantle financial barriers that hinder business growth. Our company offers a robust infrastructure essential for global expansion, featuring seamless payment processing, multi-currency business accounts, Banking as a Service (BaaS), and cryptocurrency gateways integrated into a single, intelligent platform.With a presence in 17 locations worldwide, Unlimit combines localized expertise with a vast financial network, allowing businesses the agility to grow across regions with confidence and speed. We are at the forefront of payment evolution, transitioning our infrastructure from traditional human-operated fintech to an AI-native financial system where APIs are utilized by machines, integrations are managed by agents, and systems continuously improve through intelligent automation. Our future users will not just be humans; they will be AI agents representing the interests of individuals and businesses.At Unlimit, we aim to exceed the expectations of today’s businesses by constructing the neural framework for a borderless global economy.About the Role: As the Senior Product Manager, you will take ownership of and implement the strategy for our payment processing infrastructure, which underpins global acquiring, transaction lifecycle management, and wallet operations. Your primary objective will be to develop scalable, compliant, and high-performance payment solutions that cater to intricate business needs and adapting regulatory standards. This position demands extensive knowledge of card scheme regulations (Visa, Mastercard), wallet architecture, and settlement logic, paired with a strong product focus to foster innovation in AI-driven optimization and processing automation. You will collaborate closely with engineering, compliance, and finance teams to ensure Unlimit maintains its position as a leader in payment technology.

Join our dynamic team at unlimit as a Senior UI/UX Designer. In this pivotal role, you will be responsible for designing intuitive and engaging user interfaces that enhance the overall user experience. You will collaborate closely with product managers and developers to create innovative solutions that resonate with our users.Your expertise in UI/UX design will be crucial in shaping our products and ensuring they meet the high standards of usability and aesthetic appeal.

Wargaming’s Belgrade studio is building a new AAA title: World of Tanks. The team is looking for a Senior Concept Artist to help define the game’s visual identity from the earliest stages. Role overview This role centers on shaping the look and feel of World of Tanks. The Senior Concept Artist will play a key part in setting the artistic direction, working from initial sketches through to final concepts that guide production. Creativity and dedication are essential, as the team values original ideas and thoughtful visual solutions. What you will do Create concept art to establish the visual style and atmosphere of the game Collaborate with artists, designers, and developers to develop and refine ideas Contribute new concepts and visual directions throughout the project Help steer the overall artistic vision for a large-scale, collaborative effort Team and culture The Belgrade team brings together experienced professionals and emerging talent. Collaboration is a core value, and every concept artist’s perspective influences the final product. Input from all team members is encouraged and respected as the project takes shape. Location This position is based in Belgrade.

Rivian and Volkswagen Group Technologies unites two leaders in automotive engineering to drive advancements in vehicle connectivity and software. This partnership brings together expertise in connectivity, artificial intelligence, and security to address the unique challenges of electric vehicles. The group is dedicated to developing technologies for smarter, more connected, and sustainable vehicles worldwide. Role overview The Senior Engineer for the Cloud OTA Platform will be based in Belgrade. This position focuses on building and enhancing the cloud platform that supports over-the-air software updates for vehicles. The work plays a central role in ensuring that vehicle software updates are secure, reliable, and scalable, supporting the broader vision of software-defined vehicles. What you will do Develop and advance the Cloud OTA platform for vehicle software updates Contribute to secure and dependable cloud solutions that support large-scale deployment Collaborate with a team focused on next-generation operating systems and vehicle connectivity Requirements Experience in cloud platform development Background in secure, scalable software solutions Interest in automotive technology and electric vehicles Based in or willing to work in Belgrade

Role Overview Ocorian is hiring a Senior Specialist in Fund Services for the Belgrade office. This role focuses on delivering fund administration solutions and supporting high standards of client service.

Join UsEngage in the development of all stages of large and complex domestic and international projects, from competitions to execution plans.Design exclusively using BIM (Building Information Modeling).Collaborate with designers from other disciplines within the company.

Role Overview Aghanim is seeking a Lead Senior Product Designer (UI/UX) based in Belgrade. This position guides design work across two main areas: mobile-first B2C Game Hubs and a B2B platform for studios and publishers. The primary focus is on mobile web product design, especially within Game Hubs, while also supporting the B2B platform’s suite of tools for editors, builders, dashboards, and admin/CMS functions. Collaboration is central to this role. Work closely with Product Owners and engineers to turn open-ended challenges into clear user flows and polished interfaces, seeing features through from concept to launch. Main Responsibilities Lead UX/UI Design from Concept to Launch Translate evolving briefs into clear problem statements, user flows, and UI solutions. Dig into the product domain to inform decisions that shape the user experience beyond visual design. Own the full design cycle: discover constraints, create flows, design UI, hand off to development, and iterate after launch. Rapid Prototyping and Stakeholder Alignment Create interactive prototypes quickly to test ideas and align with stakeholders. Work in Figma and use modern AI-assisted workflows to iterate efficiently while maintaining quality. Design for Both B2C and B2B Products Shape experiences for mobile-first B2C Game Hubs and advanced B2B interfaces, focusing on navigation, hierarchy, interaction patterns, and reusable components. Develop scalable workflows for editors, builders, dashboards, and admin tools to manage complexity effectively. Ensure designs perform well across small screens and a range of device capabilities. Quality Assurance in Delivery and Handoff Maintain high standards throughout design and development, ensuring quality at every stage.

JetBrains is hiring a Senior Product Manager focused on AI Analytics. This position centers on guiding projects that use artificial intelligence to improve user experience and support product growth. Role overview The Senior Product Manager will work closely with teams from different disciplines to shape and deliver AI-driven features. The goal is to ensure JetBrains products continue to set high standards in the industry. Key responsibilities Lead projects that apply AI analytics to enhance product capabilities Collaborate with engineering, design, and other teams to define and execute strategy Drive initiatives that improve user experience and support business growth Location This role is open in multiple cities, including Amsterdam, Belgrade, Berlin, Limassol, London, Madrid, Munich, Paphos, Prague, Warsaw, and Yerevan.

Join Our Creative Team!Wargaming is in search of a Senior Creative Writer with exceptional English proficiency to enhance the narrative experience of World of Tanks: HEAT. As a pivotal member of our narrative team, you'll collaborate closely with design, art, and development teams to craft compelling scripts for gameplay voiceovers, cinematics, and in-game dialogues.Your Responsibilities:Develop and refine voiceover scripts for our playable heroes and NPCs.Work alongside artists, designers, and animators to bring characters to life through high-quality in-game cinematics.Design a diverse cast of characters with intricate backstories in coordination with the narrative design team.Ensure the consistency and quality of English writing in collaboration with copywriting and localization teams.What We Are Looking For:A minimum of 3 years of experience as a game writer.Outstanding written and spoken English skills (C2 level).Demonstrated experience writing voiceover scripts for video games.Ability to work effectively within cross-functional teams.Familiarity with game development production cycles.Experience with storyboards and video production.Preferred Additional Skills:Experience with live-ops products.Knowledge of localization processes.Proficiency in using Atlassian tools.Experience with voiceover recordings and actor collaboration.Familiarity with game engines such as Unreal or Unity.Work ModeThis position offers a hybrid work mode, requiring four days in the office.BenefitsWe offer a range of benefits tailored to the local market and culture, including health insurance and additional perks.

Join Our Team at Ruby LabsAt Ruby Labs, we pride ourselves on being at the forefront of technology, developing and managing groundbreaking consumer products across health, education, and entertainment sectors. Our vibrant teams are dedicated to pioneering innovative solutions that shape the future of consumer experiences. We invite passionate and talented individuals to explore opportunities with us. Discover more about our journey at: https://rubylabs.com/about-us/Your Role as a Senior CRO SpecialistWe are seeking an experienced CRO Specialist who possesses an unwavering commitment to conversion optimization. Your goal will be to achieve a remarkable 15% growth in our conversion rates within a single quarter. Unlike roles in other companies where CRO specialists merely provide suggestions, you'll take the reins of the entire process. This includes data analysis, hypothesis formulation, designing high-fidelity mockups, collaborating with developers for implementation, and ultimately owning the performance metrics.At Ruby Labs, we recognize and reward excellence. Our compensation structure is designed to provide significant financial incentives for those who surpass expectations. If you’re eager to leverage your optimization expertise in an environment that celebrates achievement, we want to hear from you!Key ResponsibilitiesOversee the complete optimization cycle: from research and hypothesis creation to design, testing, and rollout.Conduct thorough funnel analyses and competitive benchmarking to uncover impactful opportunities.Create high-quality UI/UX mockups that effectively convey your vision while upholding brand standards.Collaborate with engineering teams to ensure seamless test implementation and deployment.Maintain rigorous attention to detail and quality throughout the optimization process.Analyze test results with statistical precision, making informed scaling decisions.Document insights and develop a systematic roadmap for ongoing conversion growth.Present findings and results effectively to stakeholders, fostering alignment and momentum.QualificationsDemonstrated success in CRO: 3+ years of practical experience, particularly with subscription models or SaaS funnels, showcasing documented performance improvements.Strong design sensibility and experience with UI/UX principles.Analytical mindset with expertise in statistical analysis and A/B testing methodologies.

About WingWing stands as a global leader in virtual talent acquisition, driven by innovation and backed by prominent venture capital. With our headquarters in San Francisco, we harness our extensive network of applicants and operational expertise to create cutting-edge AI and automation solutions. Our mission is to empower businesses by streamlining workflows, enhancing revenue generation, and connecting them with top-tier global talent.As we advance into this new era, we are establishing a high-performance outbound engine targeting small to medium-sized businesses and mid-market companies. This initiative calls for an exceptional role that merges engineering prowess, automation, experimental agility, and go-to-market execution.About the RoleWe are seeking a full-time GTM Automation Engineer to design, automate, and enhance our outbound growth systems. This hybrid position combines expertise in Clay automation, light engineering, outbound infrastructure, experimentation, and precise copywriting.Your responsibilities will include constructing and maintaining the operational backbone of our outbound engine: Clay workflows, enrichment pipelines, domain infrastructure, multi-tool integrations, personalization systems, and comprehensive data dashboards. You will execute rapid experiments, craft compelling outbound copy, troubleshoot deliverability issues, and scale outreach to hundreds of thousands of leads.Collaboration with our marketing, product, and sales teams will be paramount, yet you will exercise significant autonomy in managing your domain. The systems you develop will have a direct impact on our pipeline, revenue, and go-to-market strategy. This role is highly technical and leverages your skills at the intersection of engineering and growth, enabling you to make a substantial impact.ResponsibilitiesYou will be responsible for managing the entire outbound automation ecosystem, which includes:1. Clay Workflows & Lead Infrastructure- Develop sophisticated Clay workflows for data scraping, enrichment, verification, scoring, routing, and personalization.- Utilize APIs, webhooks, and custom code to automate data processes.- Establish Ideal Customer Profile (ICP) logic, trigger systems, and multi-step lead flows.2. Multi-Domain Email Infrastructure, Deliverability, Verification - Configure hundreds to thousands of domains, including warming, DNS management, DMARC, DKIM, and SPF.- Construct scalable campaign systems in Instantly using Apollo data.- Master email verification tools such as LeadMagic and BounceBan.- Ensure optimal deliverability and sending health across all domains.- Implement verification protocols, data cleansing, and bounce prevention strategies.3. Experiments & Optimization- Conduct multiple outbound experiments weekly, measuring performance and optimizing accordingly.

Join our dynamic team as an Automotive 'Flying Doctor' Technician! This freelance position allows you to leverage your automotive expertise while working in a fast-paced, exciting environment. As a 'Flying Doctor' Technician, you will provide critical support and maintenance solutions to ensure optimal vehicle performance and customer satisfaction. If you have a passion for automotive technology and enjoy problem-solving on the go, we want to hear from you!

Have you heard of BlueCat? We are a pioneering force in the dynamic field of Intelligent Network Operations, transforming the way organizations manage their networks. Our innovative model connects essential core services with profound insights into network health and performance, enabling businesses to adapt to change with confidence. Our Intelligent NetOps platform is the first of its kind, integrating systems of understanding and change to empower teams to enhance agility and reduce risks associated with rapid changes, all through a unified management lifecycle that spans provisioning to proactive troubleshooting.At BlueCat, we pride ourselves on our award-winning culture, which is a cornerstone of our identity. We are honored to have received numerous accolades, including the prestigious 'Great Place to Work' certification. Joining our team means becoming part of a company that stands at the forefront of technological innovation and a recognized leader among Canada’s top workplaces in categories such as Technology, Today's Youth and Women, and Mental Health and Inclusion.We are seeking a Senior Full Stack Developer who specializes in building modern web applications. In this role, you will create high-quality, high-performance user experiences and develop the API services that drive essential workflows. You will collaborate within a small Agile team, working cross-functionally to influence the technical direction of our products.

ennovationHUB is an innovative and rapidly expanding international e-commerce group specializing in the home and living sector, with a particular emphasis on furniture. Operating from our dynamic hubs in Belgrade, London, and Barcelona, we cater to customers across the UK, North America, EU, and APAC regions.As we strive towards achieving an impressive annual revenue of over €100 million by 2026, the execution of paid acquisition strategies has become a vital competitive edge. Performance, efficiency, and profitability are not merely desirable traits; they are the cornerstones of sustainable growth. This role is designed to instill ownership, structure, and accountability within one of our most crucial growth drivers.We are on the lookout for a Senior Performance Marketer to take charge of paid acquisition execution and performance for one of our flagship brands. This is a hands-on role that demands active involvement in Google Ads and Meta Ads while managing substantial budgets. You will report directly to the Global Head of Marketing and collaborate closely with our founders, analytics, and creative teams.Paid media serves as our primary revenue generator. As we scale our budgets and expand our market presence, even minor inefficiencies can accumulate rapidly, and poor structural choices can erode margins. The quality of execution directly influences profitability. This role is crucial to ensuring that our growth is intentional, measurable, and profitable—not haphazard.As the Senior Performance Marketer, your responsibilities will include:Overseeing end-to-end execution of Google Ads and Meta AdsManaging and optimizing a multi-million USD annual paid media budgetMaintaining hands-on involvement in account structure, optimization, testing, and scalingPrioritizing profitability-first growth rather than revenue at the cost of marginsTranslating business objectives into actionable paid media plansMonitoring, analyzing, and reporting on performance and unit economicsEnhancing account structure, testing frameworks, and optimization processesCollaborating closely with creative, analytics, and product teamsUtilizing tools like ClickUp for planning, prioritizing, and executing tasksIdentifying performance risks early and taking decisive actionIt is essential to note that this role is not purely strategic or advisory; it does not involve reporting without execution, nor is it a venue for agency-style output without ownership. You are expected to engage directly with the accounts and implement improvements.

Responsibilities:Collaborate seamlessly with engineers and artists to improve and streamline the process of asset production.Develop tools for efficient asset management within the engine.Create new shaders and enhance existing ones for optimal visual fidelity.Optimize assets, shaders, and pipelines to meet specific hardware requirements.Identify and resolve bugs while troubleshooting technical challenges.Foster a collaborative, team-oriented work environment.Document processes for tools and pipelines to aid team understanding.

Rivian and Volkswagen Group Technologies brings together two leading names in the automotive industry, working jointly to shape the future of mobility. This partnership centers on advanced operating systems, zonal controllers, and cloud connectivity, addressing the challenges of electric vehicles and setting new standards for software-defined vehicles worldwide. The team combines expertise in connectivity, artificial intelligence, and security to create smarter, more sustainable automotive solutions. The focus is on building a more intelligent and environmentally friendly future through shared innovation. Role overview The Indirect Purchasing Manager will drive procurement for all non-production goods and services in Belgrade. This position shapes and executes sourcing strategies, particularly for engineering services, IT software and hardware, and R&D equipment. Working closely with leaders in Engineering, IT, Legal, and Finance, the manager ensures access to top external engineering talent, specialized services, and technology resources. The goal: support the efficient, cost-effective development of next-generation automotive platforms. Key responsibilities Engineering services sourcing: Act as the main procurement contact for engineering and product development, working with design consultancies, outsourced engineering firms, and third-party testing facilities. Strategic sourcing: Develop and manage sourcing strategies for various indirect categories, with emphasis on IT, facilities, and professional services. Contract negotiation: Lead negotiations for Master Service Agreements, Statements of Work, and Service Level Agreements. Secure favorable terms, protect intellectual property, manage risk, and define deliverables with external partners. Stakeholder engagement: Advise internal technical teams, translating complex engineering needs into procurement strategies and guiding the buying process while supporting project timelines. Supplier management: Build and maintain strong relationships with key engineering suppliers to ensure alignment and mutual growth.

Role overview Sperasoft seeks a Rendering Developer to work remotely from Belgrade, Vojvodina, Serbia. The main focus is on creating and refining graphics engine components for PC and console games. This position involves both building new rendering features and tuning existing systems for better performance and visual results. What you will do Design and implement graphics engine components across several gaming platforms. Optimize rendering systems at multiple levels to boost efficiency. Write C++ code that is clean, efficient, and easy to maintain. Influence technical choices and contribute to the direction of rendering architecture. Participate in all stages of game development, from prototype through release. Collaborate with engineers, artists, designers, and QA to help deliver polished games. Mentor junior engineers and share knowledge within the team.

Join Our Team as an Engine C++ Developer for World of Warships!Wargaming is on the lookout for a skilled Engine C++ Developer to contribute their expertise to our globally acclaimed project, World of Warships. Our dynamic team consists of highly skilled professionals across various domains, all working towards the goal of creating the ultimate MMO Action game for our players! The technical challenges we face are exciting, as we strive to balance performance and resource usage while integrating cutting-edge technologies into a large-scale project. Our tech team is integral to enhancing the client side of our proprietary game engine, primarily utilizing C++20. Join us and help shape the future of World of Warships!