Technical Researcher/Engineer

🏢 Summary: Technical Researcher/Engineer role focused on researching, prototyping, and evaluating new ad tech solutions within a high-scale real-time bidding system. The position combines programming, data analysis, and experimentation to optimize bidding efficiency and improve large-scale ML-driven platforms. Work directly impacts production systems handling millions of queries per second. 🗂️ Requirements: 3+ years experience as researcher or engineer, Proficiency in programming, Strong analytical and data interpretation skills, Experience with large-scale or complex systems, Ability to build Proof of Concepts (PoCs), Experience working with real-time or distributed systems, Effective technical communication skills 📃 Skills: Python, Java, TypeScript, JavaScript, NumPy, Pandas, Jupyter, BigQuery, GCP, MachineLearning, DeepLearning, RTB, SQL 🏢 Description: As a Technical Researcher / Engineer within the Bidding Efficiency workflow, you'll play a pivotal role in exploring and understanding the latest technologies in the ad tech domain. You'll be responsible for conducting in-depth research, experimenting with new technologies, and collaborating with cross-functional teams to improve their efficacy in our systems. Your role will involve a blend of programming, research, and analytical skills to evaluate the effectiveness and feasibility of various ad tech solutions. The following skills will be crucial: Strong technical proficiency : Programming skills and the ability to understand large and complex systems and architectures. Strong desire for learning and knowledge acquisition : Openness to continuous learning and expanding skills in the ad tech domain. Independence : Ability to make decisions and take action without excessive supervision while maintaining a high standard of work. Goal-oriented mindset : Focus on achieving specific project goals and the ability to adapt in a dynamic work environment. Teamwork : Ability to effectively collaborate with team members and other teams, both internally and externally. Good communication : Ability to clearly convey knowledge and information internally between teams and in cooperation with external organizations (major browser vendors, standardization forums like W3C, GitHub discussions). Openness and willingness to experiment: Readiness to take on new challenges, explore new technologies, and seek innovative solutions. Proactive attitude : Initiative in proposing ideas and actively seeking ways to improve existing processes and solutions. Ability to build Proof of Concepts (PoCs) : Capability to create prototypes and experimental solutions to evaluate their effectiveness and utility in practice. You will work with following tech stack: Python, Java, TypeScript/JavaScript NumPy, Pandas Jupyter Notebooks BigQuery, GCP Properietary Realtime Bidding platform Agentic AI assistants and tools of your choice Must have 3+ years of experience as researcher or engineer. Proficiency in programming. Strong analytical skills and the ability to interpret data to derive meaningful insights. Good communication skills to effectively collaborate with team members and stakeholders Example projects and technologies RTB House is a performance oriented company, and our technology is our main strength. We work with more than 2000 clients across EMEA, APAC, and the Americas. Our highly optimized system serves nearly 20 million queries per second. We evaluate multiple models during a request, including deep neural nets - Machine Learning is at the very heart of our operation. We are constantly improving and extending our platform. Example projects include: Exploring the unrealised potential of various nooks and crannies inside the Realtime Bidding ecosystem, including but not limited to finding bidding inefficiencies on protocol or integration level. Work requires both in-depth inquisitive approach as well as methodical research but is potentially very rewarding - what you find and improve will immediately impact the bottom line Contest the status quo. The platform is mature and highly efficient but a complex system is never fully optimized. Help research and understand the equilibrium, design a test suite that will find the good-enough configuration balancing complexity and efficiency Many more, plus anything you can come up with! What we offer Compensation : an attractive salary and career growth opportunities Technology: access to the latest technologies and real opportunity to use of them in a large-scale and highly dynamic projects; working on extensive and rich datasets Impact: your work will be immediately impacting the company's business results and outcomes globally as well as mentor less experienced colleagues in the team Wellbeing : extremely flexible working conditions - you work when it is convenient for you and devote as much time as you can; you can work fully remotely Culture : work in a team of enthusiasts with wide experience in ML who willingly share their knowledge and learnings on a daily basis, no BS environment Purpose-Driven Work : being at heart of the system, your growing knowledge and competences will be used in practical applications directly connected to business results

🏢 Summary: Technical Researcher / Engineer role focused on exploring, evaluating, and improving ad tech solutions within a large-scale Real-Time Bidding platform. The position combines research, programming, and data analysis to build Proof of Concepts and optimize system efficiency in a high-performance, ML-driven environment. Work directly impacts business results through experimentation and technological innovation. 🗂️ Requirements: 3+ years experience as researcher or engineer, Proficiency in programming, Strong analytical skills and data interpretation, Ability to build Proof of Concepts (PoCs), Experience working with large and complex systems, Good technical communication skills 📃 Skills: Python, Java, TypeScript, JavaScript, NumPy, Pandas, Jupyter, BigQuery, GCP, RTB, MachineLearning, DeepLearning, SQL 🏢 Description: As a Technical Researcher / Engineer within the Bidding Efficiency workflow, you'll play a pivotal role in exploring and understanding the latest technologies in the ad tech domain. You'll be responsible for conducting in-depth research, experimenting with new technologies, and collaborating with cross-functional teams to improve their efficacy in our systems. Your role will involve a blend of programming, research, and analytical skills to evaluate the effectiveness and feasibility of various ad tech solutions. The following skills will be crucial: Strong technical proficiency : Programming skills and the ability to understand large and complex systems and architectures. Strong desire for learning and knowledge acquisition : Openness to continuous learning and expanding skills in the ad tech domain. Independence : Ability to make decisions and take action without excessive supervision while maintaining a high standard of work. Goal-oriented mindset : Focus on achieving specific project goals and the ability to adapt in a dynamic work environment. Teamwork : Ability to effectively collaborate with team members and other teams, both internally and externally. Good communication : Ability to clearly convey knowledge and information internally between teams and in cooperation with external organizations (major browser vendors, standardization forums like W3C, GitHub discussions). Openness and willingness to experiment: Readiness to take on new challenges, explore new technologies, and seek innovative solutions. Proactive attitude : Initiative in proposing ideas and actively seeking ways to improve existing processes and solutions. Ability to build Proof of Concepts (PoCs) : Capability to create prototypes and experimental solutions to evaluate their effectiveness and utility in practice. You will work with following tech stack: Python, Java, TypeScript/JavaScript NumPy, Pandas Jupyter Notebooks BigQuery, GCP Properietary Realtime Bidding platform Agentic AI assistants and tools of your choice Must have 3+ years of experience as researcher or engineer. Proficiency in programming. Strong analytical skills and the ability to interpret data to derive meaningful insights. Good communication skills to effectively collaborate with team members and stakeholders Example projects and technologies RTB House is a performance oriented company, and our technology is our main strength. We work with more than 2000 clients across EMEA, APAC, and the Americas. Our highly optimized system serves nearly 20 million queries per second. We evaluate multiple models during a request, including deep neural nets - Machine Learning is at the very heart of our operation. We are constantly improving and extending our platform. Example projects include: Exploring the unrealised potential of various nooks and crannies inside the Realtime Bidding ecosystem, including but not limited to finding bidding inefficiencies on protocol or integration level. Work requires both in-depth inquisitive approach as well as methodical research but is potentially very rewarding - what you find and improve will immediately impact the bottom line Contest the status quo. The platform is mature and highly efficient but a complex system is never fully optimized. Help research and understand the equilibrium, design a test suite that will find the good-enough configuration balancing complexity and efficiency Many more, plus anything you can come up with! What we offer Compensation : an attractive salary and career growth opportunities Technology: access to the latest technologies and real opportunity to use of them in a large-scale and highly dynamic projects; working on extensive and rich datasets Impact: your work will be immediately impacting the company's business results and outcomes globally as well as mentor less experienced colleagues in the team Wellbeing : extremely flexible working conditions - you work when it is convenient for you and devote as much time as you can; you can work fully remotely Culture : work in a team of enthusiasts with wide experience in ML who willingly share their knowledge and learnings on a daily basis, no BS environment Purpose-Driven Work : being at heart of the system, your growing knowledge and competences will be used in practical applications directly connected to business results

🏢 Summary: Senior Technical Researcher/Engineer role focused on researching, prototyping, and evaluating cutting-edge AdTech technologies for large-scale systems. The position combines deep technical research, programming, and experimentation to assess feasibility and integrate new solutions, including privacy mechanisms and mobile optimizations. You will build PoCs and collaborate cross-functionally to enhance performance, compliance, and ML-driven capabilities. 🗂️ Requirements: 5+ years experience as researcher or engineer, Strong programming skills, Ability to understand large-scale systems and architectures, Experience building Proof of Concepts, Ability to evaluate and integrate new technologies, Experience with privacy mechanisms and browser technologies, Experience with mobile platforms Android and iOS, Collaboration with cross-functional technical teams 📃 Skills: Python, Java, Scala, TypeScript, JavaScript, PyTorch, NumPy, Pandas, Jupyter, BigQuery, GCP, DeepLearning, MachineLearning, Android, iOS, GitHub 🏢 Description: Location: Poland We Are: RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. You Will: As a Senior Technical Researcher/Engineer within the AdTech Technical Research Team , you'll play a pivotal role in exploring and understanding the latest technologies in the ad tech domain. You'll be responsible for conducting in-depth research, experimenting with new technologies, and collaborating with cross-functional teams to assess their potential for integration into our systems. Your role will involve a blend of programming, research, and analytical skills to evaluate the effectiveness and feasibility of various ad tech solutions. Desired Experience: 5+ years of experience as researcher or engineer. Strong technical proficiency: programming skills and the ability to understand large and complex systems and architectures. Openness and willingness to experiment & learn: readiness to take on new challenges, explore new technologies, and continuously expand knowledge in the ad tech domain. Independence & proactive attitude: ability to take initiative, make decisions, and act without excessive supervision while maintaining a high standard. Goal-oriented mindset: focus on achieving specific project goals and adaptability in a dynamic environment. Collaboration & communication: ability to work effectively with teammates and other teams, clearly sharing knowledge and cooperating with external organizations (e.g. major browser vendors, W3C, GitHub discussions). Ability to build Proof of Concepts (PoCs): creating prototypes and experimental solutions to evaluate effectiveness and utility. Selected Technologies & Projects: Python, Java, Scala, TypeScript/JavaScript PyTorch, NumPy, Pandas Jupyter Notebooks BigQuery, GCP Browser Engines Assessing new privacy mechanisms (e.g. Privacy Sandbox APIs) by building PoCs, testing, and suggesting improvements (via GitHub issues or meetings). The goal is to evaluate their feasibility, ensure compliance, and enhance user privacy. Exploring solutions for Android and iOS, including creating prototypes to improve performance on mobile platforms. This requires close collaboration with other teams and leveraging ML opportunities. Many more — including your own ideas! We Offer: Compensation: an attractive salary and career growth opportunities Technology: access to the latest technologies and real opportunity to use of them in a large-scale and highly dynamic projects; extensive and rich datasets Impact: your contribution will directly influence the company's business results and outcomes globally, while also giving you the chance to mentor less experienced colleagues in the team Wellbeing: extremely flexible conditions – you act when it is convenient for you and devote as much time as you can; you can operate fully remotely Culture: be part of a team of enthusiasts with wide experience in ML who willingly share their knowledge and learnings on a daily basis, no BS environment Apply now! You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it.

🏢 Summary: Senior Engineer role focused on designing and leading high-performance, highly scalable components of a real-time bidding platform processing over 20 million requests per second. The position involves building, optimizing and maintaining distributed HTTP/gRPC services and batch jobs in Java and Python, while ensuring observability, reliability and top engineering standards. The role combines deep technical expertise with hands-on leadership in complex, cross-team projects. 🗂️ Requirements: Excellent understanding of complex IT systems from hardware to algorithms, Very good knowledge of Internet protocols (DNS, HTTP, cookies), Knowledge of concurrent programming and distributed systems, Ability to monitor, analyze and troubleshoot production systems, Ability to analyze and optimize system performance, Knowledge of high scalability and high availability concepts, Fluent English and Polish (C1) 📃 Skills: Java, Python, DNS, HTTP, gRPC, Aerospike, Memcached, GCP, BigQuery, MinIO, Kafka, Clickhouse, PostgreSQL, Elasticsearch, Kubernetes, Prometheus, Jenkins, Graphite 🏢 Description: RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. We are looking for Senior Engineers to support our Bidding Platform organization which is the core of the RTB business, processing over 20 million requests per second to participate in real-time auctions and display advertisements to customers from 90+ countries. If you want to work on technically complex and demanding solutions, this is the opportunity for you! Our Senior Engineers are experts who combine deep technical expertise with a strong sense of ownership, and they take on Tech Lead roles in complex, cross-team projects. You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement, test, deploy, monitor and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) HTTP / gRPC services and batch jobs in Java and Python, ensuring adherence to the high engineering standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms. Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production). General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: Java, Python Aerospike, Memcached Google Cloud Platform, BigQuery, MinIO Kafka, Clickhouse PostgreSQL Elasticsearch Kubernetes, Prometheus Jenkins, Graphite We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible.

🏢 Summary: Staff Engineer role in a high-performance Bidding Platform processing 20M+ real-time auction requests per second. The position focuses on designing and leading complex distributed systems, improving end-to-end ad workflows, and driving architectural excellence in a Deep Learning-powered AdTech environment. It combines hands-on technical leadership with ownership of large-scale, cross-team initiatives. 🗂️ Requirements: 10+ years of experience designing, developing and deploying complex software systems, 3+ years of technical leadership experience in medium or large organizations, Strong expertise in distributed systems architecture and networking fundamentals, Ability to design and lead high-performance, scalable system solutions, Experience conducting code reviews and enforcing coding standards, Fluency in English (C1), Fluency in Polish (C1) 📃 Skills: Java, Python, Aerospike, Memcached, GoogleCloudPlatform, BigQuery, MinIO, Kafka, Clickhouse, PostgreSQL, Elasticsearch, Kubernetes, Prometheus, Jenkins, Graphite, OpenRTB, MRAID, VAST 🏢 Description: Location: Poland (Remote/Flexible) We are: RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. We are looking for engineers to join our Bidding Platform organization which is the core of the RTB business, processing over 20 million requests per second to participate in real-time auctions and display advertisements to customers from 90+ countries. If you want to work on technically complex and demanding solutions, this is the opportunity for you! Our Staff Engineers are experts who combine deep technical expertise with a strong sense of ownership, and they take on Tech Lead roles in complex, cross-team projects. You will: Gain deep understanding of our ad technology and become familiar with ad industry standards: OpenRTB, MRAID, VAST etc. Analyse issues with our end-to-end ad workflows, reproduce problematic cases, and come up with proposals for improvements Design technical and operational solutions that improve ad experience and our performance metrics Lead implementation of the aforementioned architectural solutions, ensuring its high quality, and evaluating its impact on business performance Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Cooperate with stakeholders across the entire organization Requirements: 10+ years of hands-on experience in designing, developing and deploying complex software systems 3+ years of tech leadership experience (e.g. tech lead, staff, architect roles) in medium or large organizations Excellent understanding of complex, distributed IT systems - from the hardware and networking level, through software, to algorithms C1 level in English and Polish Nice to have: Experience in the AdTech/Real Time Bidding space. Selected technologies used: Java, Python Aerospike, Memcached Google Cloud Platform, BigQuery, MinIO Kafka, Clickhouse PostgreSQL Elasticsearch Kubernetes, Prometheus Jenkins, Graphite We Offer: Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects. Cooperation based on B2B contract. You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow.

🏢 Summary: Senior Frontend Engineer role focused on designing and leading high-performance ad display solutions within a large-scale real-time bidding platform processing millions of requests per second. The position combines hands-on development in JavaScript/TypeScript with technical leadership in complex, cross-team projects. Work centers on performance optimization, scalability, and production system monitoring in a global AdTech environment. 🗂️ Requirements: 8+ years of experience developing complex web software, Proficiency in JavaScript and TypeScript, Strong knowledge of browser APIs, Experience with build tools such as Webpack or Vite, Practical experience with web performance optimization and advanced loading strategies, Very good knowledge of DNS, HTTP, cookies and related Internet technologies, Ability to monitor, analyze and troubleshoot production systems, Understanding of system architectures and backend API integration, Experience with CI/CD pipelines 📃 Skills: JavaScript, TypeScript, BrowserAPIs, Webpack, Vite, OpenRTB, MRAID, VAST, DNS, HTTP, Cookies, CI/CD, Monitoring, RUM, APIs, Caching 🏢 Description: We are: RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. We are looking for engineers to join our Bidding Platform organization which is the core of the RTB business, processing over 20 million requests per second to participate in real-time auctions and display advertisements to customers from 90+ countries. If you want to work on technically complex and demanding solutions, this is the opportunity for you! Our Senior Engineers are experts who combine deep technical expertise with a strong sense of ownership, and they take on Tech Lead roles in complex, cross-team projects. You will: Gain deep understanding our ad technology and become familiar with ad industry standards: OpenRTB, MRAID, VAST etc. Design and lead implementation of high-quality frontend solutions for displaying Ads globally, focusing on performance and scalability. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript, ensuring adherence to the highest coding standards. Develop monitoring systems to track crucial metrics like reliability or viewability and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: 8+ years of hands-on experience in developing complex web software Proficiency in JavaScript/TypeScript and browser APIs. Experience with relevant build tooling (e.g., Webpack, Vite). Practical experience and strong understanding of Web Performance optimization techniques and advanced loading strategies (caching, asset delivery). Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). Good understanding of full-stack concepts, including system architectures, working with backend APIs and deployment/CI/CD pipelines. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. We Offer: Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects. Cooperation based on B2B contract. You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow.

🏢 Summary: The role involves acting as the primary technical expert within a Supplier Campaign Team, responsible for designing, implementing, and improving campaign solutions across multiple systems. It focuses on technical consulting, system integration, architecture design, and ensuring scalable and efficient campaign execution. The position bridges business and technical teams to deliver resilient, high-performing campaign infrastructures. 🗂️ Requirements: Container platform expertise with OpenShift or Kubernetes, Experience with virtualization environments, Experience with observability tools, Scripting experience in Python, Understanding of microservice architecture, Ability to manage system dependencies (App, Marketing Platform, Couponing Center), Technical consulting experience in complex system landscapes, Fluent English 📃 Skills: OpenShift, Kubernetes, Virtualization, Elastic, Logstash, Kibana, Prometheus, Grafana, Python, Microservices 🏢 Description: The Technical Infrastructure Engineer plays a central role within a Supplier Campaign Team as the primary technical expert for all business units utilizing and designing campaign solution within PAYBACK. He collaborates closely with Product Owner and Business Owner as part of the Team. The Technical Infrastructure Expert is responsible for the technical conception, implementation, and sustainable technical improvements for the chosen solutions. This position requires comprehensive technical expertise as well as excellent communication and coordination skills. Your responsibilities: Technical Consulting during the development of new campaigns, distinguishing between standard and non-standard formats, early identification of technical requirements and challenges. Clear picture on required systems, evaluation and managing of dependencies between these systems (eg. App, Marketing Platform, Couponing Center) in close alignment with Product Owner. The Technical Architect links business units with the relevant technical experts and contacts within and outside the Trinity team to ensure efficient campaign execution. This also includes alignment between technical set up of Datacenter Services, Campaign executing Vendor and PAYBACK Organization. Ensures clear communication and guarantees that technical queries are answered competently. Consulting in technical feasibility, performance aspects and scalable execution Deep Analysis and Retrospectives after Campaigns to create a resilient architecture. In case of technical or procedural problems during a campaign, the TO supports the respective process owners and contributes to a rapid resolution. Your Profile: Strong coordination skills and confident in management of complex processes between various business areas, key stakeholders and external providers. Excellent communication skills with focus on “translating” technical topics and requirements for business units Container Platform expertise with Openshift or Kubernetes Knowledge of virtualization environments Experience with Observability Tools like Elastic, Logstash, Kibana, Prometheus and Grafana Scripting experience (e.g. Python) Architecture understanding for modern microservice architectures Fluent English is mandatory, German language skills appreciated How about? Employment contract? Of course. With us you do not have to worry about stable employment. Benefits? We have them! Among other: corporate incentive program, sport card, private medical care. Lunch card? With the cooperation extended and permanent contract, you will receive additional funds to use for meal purchases. Working in a hybrid model? Of course! ! You work with us 2 days a week from home. Work wherever you want? In PAYBACK you have the opportunity. Working 100% remotely, also from European countries for 15 days a year. ‎Flexible working hours? Sounds great! We start working between 7 to 10. Trainings? Of course. We provide training to develop hard and soft skills. Convenient location? Sure! We invite you to our new office at Rondo Daszyńskiego, but we are currently also working remotely. Dress code? We definitely say no. There are no rigid dress code rules in our company, sneakers are more than welcome. Friendly atmosphere at work? Yes! In PAYBACK, people are the most important asset‎. ‎Something is missing? Open communication is our priority, so dare to ask!‎

🏢 Summary: Senior-level role focused on designing and leading high-performance, scalable frontend and full-stack solutions for global ad delivery and tracking systems. The position emphasizes web performance optimization, observability (RUM and Synthetic), and architectural excellence across performance-critical features. You will drive measurable improvements in user metrics while maintaining top coding standards and technical leadership. 🗂️ Requirements: 8+ years of hands-on software engineering experience, Strong understanding of frontend development and internal mechanisms, Proven experience in web performance optimization and advanced loading strategies, Proficiency in JavaScript and TypeScript, Experience with modern frontend frameworks (React), Experience with build tools (Webpack or Vite), Knowledge of Internet protocols and technologies (DNS, HTTP, cookies), Experience monitoring and analyzing production systems, Understanding of full-stack concepts and backend APIs (Node.js, Python, or Java), Experience with deployment and CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Node.js, Python, Java, Webpack, Vite, DNS, HTTP, Cookies, RUM, Synthetic, CICD, Caching, Monitoring 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement and maintain high-quality frontend and full-stack solutions for displaying Ads globally, focusing on extreme performance and scalability. Develop monitoring systems (RUM and Synthetic) to track crucial metrics like reliability or viewability and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript/Python/Java, ensuring adherence to the highest coding and performance standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: 8+ years of hands-on experience in software engineering, including the understanding of Frontend Development and its internal mechanisms. Practical experience and strong understanding of Web Performance optimization techniques and advanced loading strategies (caching, asset delivery). Solid proficiency in JavaScript/TypeScript and modern frameworks like e.g., React. Experience with relevant build tooling (e.g., Webpack, Vite). Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). Good understanding of full-stack concepts, including working with backend APIs (Node.js, Python, or Java) and deployment/CI/CD pipelines. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: You will be working within a modern stack that includes JavaScript/TypeScript, React, Node.js, Python, and Java. We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering or web performance, send us your CV, and we'll review it.

🏢 Summary: Lead the design and implementation of high-performance, scalable frontend and full-stack solutions for globally distributed ad systems, with a strong focus on web performance and observability. The role involves optimizing critical user metrics, building monitoring systems, and ensuring robust architecture and code quality across performance-sensitive features. 🗂️ Requirements: 8+ years of hands-on software engineering experience, Strong expertise in frontend development and internal browser mechanisms, Proven experience in web performance optimization and advanced loading strategies, Proficiency in JavaScript and TypeScript, Experience with modern frontend frameworks such as React, Experience with build tools such as Webpack or Vite, Solid understanding of Internet protocols including DNS and HTTP, Ability to monitor, analyze, and diagnose production system performance, Understanding of full-stack concepts and backend API integration, Experience with CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Node.js, Python, Java, Webpack, Vite, DNS, HTTP, RUM, CICD, Caching 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement and maintain high-quality frontend and full-stack solutions for displaying Ads globally, focusing on extreme performance and scalability. Develop monitoring systems (RUM and Synthetic) to track crucial metrics like reliability or viewability and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript/Python/Java, ensuring adherence to the highest coding and performance standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: 8+ years of hands-on experience in software engineering, including the understanding of Frontend Development and its internal mechanisms. Practical experience and strong understanding of Web Performance optimization techniques and advanced loading strategies (caching, asset delivery). Solid proficiency in JavaScript/TypeScript and modern frameworks like e.g., React. Experience with relevant build tooling (e.g., Webpack, Vite). Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). Good understanding of full-stack concepts, including working with backend APIs (Node.js, Python, or Java) and deployment/CI/CD pipelines. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: You will be working within a modern stack that includes JavaScript/TypeScript, React, Node.js, Python, and Java. We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering or web performance, send us your CV, and we'll review it.

🏢 Summary: Senior engineer role focused on designing and implementing high‑performance, scalable frontend and full‑stack solutions for global ad delivery systems. The position emphasizes web performance optimization, observability, and monitoring (RUM and Synthetic) to improve critical user metrics. You will lead technical initiatives, build performance‑critical features, and ensure high code quality across JavaScript/TypeScript-based systems. 🗂️ Requirements: 8+ years of hands-on software engineering experience, Strong understanding of frontend development and internal browser mechanisms, Practical experience with web performance optimization techniques, Proficiency in JavaScript and TypeScript, Experience with modern frontend frameworks (React), Experience with build tools (Webpack or Vite), Knowledge of Internet protocols (DNS, HTTP, cookies), Experience monitoring and analyzing production systems, Understanding of full-stack architecture and backend APIs (Node.js, Python, or Java), Experience with CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Node.js, Python, Java, Webpack, Vite, DNS, HTTP, cookies, CI/CD, RUM, Synthetic, caching, observability, APIs 🏢 Description: You will: Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics. Implement and maintain high-quality frontend and full-stack solutions for displaying Ads globally, focusing on extreme performance and scalability. Develop monitoring systems (RUM and Synthetic) to track crucial metrics like reliability or viewability and use data to diagnose and resolve performance bottlenecks. Collaborate closely with Ads Layouts specialists and backend engineers to ensure smooth data flow and optimal architectural alignment for performance-critical features. Write, test, and deploy robust, efficient, and well-documented code in JavaScript/TypeScript/Python/Java, ensuring adherence to the highest coding and performance standards. Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews. Requirements: 8+ years of hands-on experience in software engineering, including the understanding of Frontend Development and its internal mechanisms. Practical experience and strong understanding of Web Performance optimization techniques and advanced loading strategies (caching, asset delivery). Solid proficiency in JavaScript/TypeScript and modern frameworks like e.g., React. Experience with relevant build tooling (e.g., Webpack, Vite). Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others). Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it). Good understanding of full-stack concepts, including working with backend APIs (Node.js, Python, or Java) and deployment/CI/CD pipelines. C1 level in English and Polish. Nice to have: Experience in the AdTech/Real Time Bidding space. Experience contributing to Real User Monitoring (RUM) systems. Selected technologies used: You will be working within a modern stack that includes JavaScript/TypeScript, React, Node.js, Python, and Java. We Offer: Projects focused on extreme performance and high code quality – solid code reviews are our standard. Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers). Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses). Flexible working conditions – no core hours, fully remote cooperation possible. Apply now! You don't need to tick every box to apply. If you are passionate about software engineering or web performance, send us your CV, and we'll review it.