D2C Front-end Architect

🏢 Summary: Senior Web Architect role focused on driving technical optimization, architectural governance, and web performance across multiple development teams. The position involves evaluating and integrating modern front-end technologies within a MACH/microservices landscape while reducing technical debt and ensuring best development practices. You will coordinate architectural decisions and guide teams in building scalable, high-performance web solutions. 🗂️ Requirements: Minimum 5 years web development experience, Minimum 3 years architecture experience, Strong knowledge of MACH architecture, Strong knowledge of Microservices architecture, Deep expertise in Next.js, Deep expertise in NodeJS, Deep expertise in TypeScript, Experience with GitHubActions, Experience with GraphQL, Experience with Git, Strong understanding of Webperformance, Ability to evaluate and implement technical optimizations, Experience coordinating architectural decisions (ADRs), Fluent English 📃 Skills: Next.js, NodeJS, TypeScript, GraphQL, Git, GitHubActions, MACH, Microservices, Kubernetes, ContentStack, commercetools, Webperformance, Architecture, AI 🏢 Description: Your responsibilities Investigate technical optimizations, synergies, automation (ex: through AI), and technical depth / debt reduction potential. Coordinate processes, decisions and patterns of development across seven development teams (ex: facilitate architectural decision records ADRs) Evaluates front-end technical concepts and technologies for feasibility and fit-check into the system landscape (proof of concepts, technology review and critical analysis). Steer & consult the practices defined in the project, and regarding web performance and review the overall development practices with the teams, starting from benchmarking and metrics definitions etc. Your profile Min 5 years experience in the field of web development (overall). Min 3 years experience in architecture related areas. Higher education (Bachelor or Master) in computer science or related fields is preferable, however this is optional in case other significant credentials in experience and knowledge can be demonstrated (certificates / long experience with successful track record / references). Familiar and comfortable with modern software development principles, practices and frameworks (specifically MACH / Microservices architecture). Deep understanding in: Next.js, NodeJS, TypeScript, Github actions, GraphQL, Git, Web performance. Familiarity that are nice to have: Kubernetes, CMS Systems (ContentStack), Commerce systems (commercetools). Fluent and comfortable in English. Great communication skills are essential (collaboration cross-teams, locations and stakeholders is the core of this role). Your benefits Dynamic International Environment: Collaborate with diverse teams globally, enriching your experience and expanding your professional network Collaborative Team Culture: Join a supportive team that values your contributions and encourages your growth Professional Development Opportunities: Expand your skills through engaging projects and responsibilities that challenge and inspire you Flexible hybrid work arrangements: Enjoy a mix of remote work and office collaboration, with a minimum of one day per week in our modern offices Comprehensive Benefits Package: Enjoy private health care, a Lunchpass card, a sports card, group insurance options and employee discounts

🏢 Summary: Senior Front-End Software Architect role focused on modernizing and scaling a large enterprise web platform through micro-frontend architecture and React-based solutions. The position combines hands-on development with architectural leadership, driving migration from legacy systems and defining front-end standards across teams. You will design a shared App Shell, improve performance and security, and guide technical direction while staying close to the code. 🗂️ Requirements: 8+ years of front-end development experience, Expert knowledge of JavaScript, Expert knowledge of TypeScript, Hands-on experience with micro-frontends architecture, Experience modernizing legacy front-end systems, Strong knowledge of scalable and high-performance web applications, Advanced knowledge of modern build tools, Experience with unit and end-to-end testing, Experience with design systems and component-driven development, Strong CSS knowledge including preprocessors, Experience with CI/CD pipelines 📃 Skills: JavaScript, TypeScript, React, Webpack, Vite, Rollup, Jest, TestingLibrary, Vitest, Storybook, SASS, LESS, CSS, CI/CD, GitHubActions, Jenkins, Terraform, ModuleFederation, Microfrontends 🏢 Description: We’re looking for an experienced Front-End Software Architect to help modernize and scale a large enterprise web platform. In this role, you’ll work hands-on with modern front-end technologies, design and implement a micro-frontend App Shell architecture, and support the migration from legacy systems to modern, React-based solutions. You’ll have a strong technical voice, influence architectural decisions, and help shape front-end standards used across multiple teams — all while staying close to the code. Responsibilities: Design and implement a scalable micro-frontend architecture, including a shared App Shell and reusable component libraries. Lead the migration of features from legacy applications (e.g. .NET-based systems) to modern React solutions. Collaborate closely with full-stack and platform engineers to define patterns for module federation, routing, and inter-application communication. Establish and promote front-end standards, architectural patterns, and best practices across teams. Define integration approaches for shared authentication, login flows, routing across multiple apps on the same domain, and inter-app communication. Drive improvements in performance, security, observability, and reliability across distributed front-end systems. Review code, mentor other engineers, and contribute to a culture of high engineering standards and continuous improvement. Requirements: 8+ years of experience in front-end development, with a strong technical background and experience influencing architecture. Expert-level knowledge of JavaScript and TypeScript. Hands-on experience designing and delivering micro-frontends and modernizing legacy front-end architectures. Strong understanding of building scalable, high-performance web applications. Experience aligning technical solutions with business and delivery goals. Advanced knowledge of modern build tools such as Webpack, Vite, or Rollup. Solid testing experience, including unit and end-to-end testing (Jest, Testing Library, Vitest, or similar). Deep understanding of design systems and component-driven development (Storybook, design tokens). Strong CSS knowledge, including preprocessors (SASS / LESS) and responsive layouts. Experience working with CI/CD pipelines and tools like GitHub Actions, Jenkins, or Terraform. Familiarity with backend technologies and microservices architectures is a plus. Nice to have: Knowledge of web accessibility standards (WCAG) and internationalization (i18n). Experience building offline-ready applications and implementing graceful degradation strategies.

🏢 Summary: Full-time B2B contract for a Software Architect (Backend & APIs) to design and build a greenfield, scalable analytics and research platform in the financial sector. The role focuses on defining cloud-native backend architecture, APIs, and integration standards to support secure content management and distribution at scale. The project runs from July 2026 to February 2027 and targets institutional clients with future retail expansion. 🗂️ Requirements: 8+ years of professional software engineering experience, Strong experience designing backend architectures and APIs, Hands-on experience with production-grade backend systems, Experience with scalable distributed and cloud-native systems, Ability to define API contracts, versioning, and integration standards, Experience with authentication and authorization mechanisms, Experience leading architectural decisions and technical discussions, Experience across full software development lifecycle, Fluent English (C1 minimum) 📃 Skills: Java, Spring, REST, OpenAPI, PostgreSQL, Docker, Kubernetes, GKE, GCP, APIGateway, ServiceMesh, OIDC, SSO, JWT, Observability, Monitoring, Microservices, DDD, EventDriven, CloudNative, DistributedSystems, AI, LLM 🏢 Description: 📍 Remote 🕒 Full-time 📄 B2B 📅 Project duration: July 2026 – February 2027 About the project We are looking for an experienced Software Architect (Backend & APIs) to join an ambitious greenfield initiative in the financial sector. The project focuses on designing and building from scratch a modern, scalable analytics and research platform that will support the complete lifecycle of premium financial content - from creation and management to publication, distribution, and consumption analytics. The platform will initially serve institutional clients, with a planned expansion toward retail users in later phases. This is a high-impact role for someone who enjoys solving complex architectural challenges, designing systems for scale, and shaping technical direction from the ground up. You will help create a platform that: streamlines and automates financial research workflows structures and manages large volumes of analytical content enables secure and scalable content distribution provides advanced insight into user engagement and content consumption supports future scalability across multiple client segments Your responsibilities Design and evolve scalable backend and API architectures for cloud-native and hybrid environments Define system architecture with strong focus on scalability, maintainability, resilience, and security Design public and internal APIs, including versioning strategy, contracts, backward compatibility, and integration standards Collaborate with sales and delivery teams during technical discovery, estimation, and solution planning Work closely with engineering teams to solve complex backend challenges and improve technical standards Drive architectural decisions and clearly communicate technical trade-offs Collaborate directly with clients and domain experts to clarify requirements and translate business needs into technical solutions Create and maintain architecture documentation, technical proposals, and design decisions Support engineering excellence through improvements in tooling, development practices, and platform standards Explore and apply AI-powered engineering tools to enhance productivity and system capabilities Tech environment You will work with modern backend and cloud technologies, including: Java 21, Spring Boot REST APIs / OpenAPI PostgreSQL Docker, Kubernetes, GKE Google Cloud Platform API Gateway / service mesh solutions Event-driven integrations Authentication & authorization standards (OIDC / SSO / JWT) Observability and monitoring tooling We value strong understanding of modern architectural approaches such as modular systems, domain-oriented design, contract-first APIs, event-driven patterns, and cloud-native distributed systems. Must have 8+ years of professional software engineering experience Strong hands-on experience designing backend architectures and APIs Proven ability to lead architectural discussions and make pragmatic technical decisions Practical experience building and reviewing real production-grade backend systems Strong experience working directly with clients and external stakeholders Excellent communication skills and ability to explain complex technical concepts clearly Experience with scalable distributed systems and cloud-native architectures Transparent, proactive, and solution-oriented mindset Experience across the full software lifecycle - from prototyping to strategic architectural direction Strong command of written and spoken English ( C1 minimum ) Nice to have Experience in the financial sector or highly regulated environments Experience with event-driven architectures and asynchronous integrations Knowledge of modern identity and access management solutions Familiarity with AI-powered development tools, LLM-based workflows, or AI-assisted engineering practices We value your trust in providing us your data, thus we are striving to use commercially acceptable means of protecting it. Below you will find the necessary information about the data we collect and process when you send us your CV. The controller of your personal data is Miquido Spółka z ograniczoną odpowiedzialnością sp. k. with its seat in Krakow, Zabłocie 43a, 30-701 Kraków, Poland (“Miquido”, “We”, “Our” or “Us”).

🏢 Summary: Senior Front-End Tech / Team Lead role focused on building scalable, enterprise-grade applications using React and TypeScript while leading a development team. Combines hands-on frontend engineering with architectural decision-making, code quality ownership, and technical mentorship. Involves working within Agile processes to deliver high-quality, secure, and maintainable solutions. 🗂️ Requirements: Senior or Lead-level frontend development experience, Proven experience leading technical teams, Strong expertise in React and TypeScript, Experience with Redux and RTK Query, Experience with relational and NoSQL databases, Experience with containerization and orchestration tools, Experience with CI/CD and Git-based workflows, Knowledge of unit and integration testing frameworks, Experience working in Agile environments, Ability to translate business requirements into technical solutions 📃 Skills: React, TypeScript, Redux, RTKQuery, HTML5, CSS3, Tailwind, PostgreSQL, MongoDB, SQLServer, RabbitMQ, Redis, Auth0, Kubernetes, Docker, Git, GitLab, Azure, Jest, Mocha, JUnit, NUnit, SCORM, xAPI, LTI, MSGraphAPI, ZoomSDK, WCAG 🏢 Description: Key Role Objectives The Front-End Tech / Team Lead role combines deep technical expertise with leadership responsibilities, ensuring high quality code delivery while mentoring and guiding the development team, help make architectural decisions, and build scalable and enterprise solutions. Key Details Location: [Krakow – preferred] Employment Type: [B2B] Experience Level: [ Senior / Lead] Key Requirements   |   Technical Frontend: React 18 with Typescript, Redux, RTK Query, HTML5, CSS3, Tailwind Databases: PostgreSQL, MongoDB, SQL Server Other Third Party: RabbitMQ, Redis, Auth0 DevOps: K8s, Docker, Git (GitLab), Azure Testing: Unit and integration testing frameworks (e.g., Jest, Mocha, Junit, NUnit) Bonus: LTI standards, SCORM/xAPI, or real-time systems (e.g., live quizzes, video classrooms) Key Requirements | Leadership Proven experience in a lead or senior role guiding technical teams Team communication skills and experience working in Agile environments Strong stakeholder management skills and ability to interpret and evaluate business goals Ability to translate business goals into technical execution plans Key Responsibilities | Technical Develop, test and maintain robust and stable services and applications using your language of expertise Follow the mandatory standards and conventions, including technical and behavioural, defined for the project Read and follow the architectural product documentation in decision-making process and implementation Ensure high quality and correctness of the changes produced by your teammates through meticulous code reviews Cover your produced code with effective unit tests and ensure sufficient level of coverage Follow the product non-functional requirements, including performance, security, maintainability, and scalability Participate in architectural decisions; contribute to technical strategy and documentation Keep abreast and informed about the latest technological improvements, be curious and proactive to apply the best technologies and practices to the project being developed Key Responsibilities | Leadership Lead a l team of developers through agile sprints and project lifecycles Mentor junior and mid-level engineers, foster a culture of collaboration and innovation and promote best practices Communicate and ensure processes, standards and conventions established for the project Collaborate with Product Managers, UX/UI Designers and QA teams, to align tech solutions with business goals Translate product requirements into technical deliverables that meet business requirements and deadlines Drive continuous improvement in processes, architecture, and team culture Own and manage technical debt, refactoring, and system improvements Nice to Haves Prior experience in the EdTech domain (e-learning platforms, digital classrooms, LMS) Knowledge of learning science, instructional design, or accessibility standards (e.g., WCAG) Familiarity with MS Graph API, Auth0 API, Zoom SDK, LTI, Clever

🏢 Summary: Senior React Architect role focused on defining and leading the front-end architecture for enterprise-scale banking platforms using micro-frontend strategies. The position involves setting technical direction, establishing best practices, and ensuring scalability, performance, and security across the front-end ecosystem. Hybrid B2B opportunity in Wroclaw with long-term cooperation and exposure to modern technologies. 🗂️ Requirements: 8+ years of software development experience, Strong experience with React.js including hooks, state management, and lifecycle, Proficiency in TypeScript, Proficiency in JavaScript (ES6+), Experience with micro-frontend architecture, Experience with REST API integration, Strong knowledge of design patterns and best practices 📃 Skills: React, TypeScript, JavaScript, ES6, Micro-frontend, REST, Azure, Java, Spring, SpringBoot, .NET, Docker, Kubernetes 🏢 Description: We are seeking a highly experienced React Architect to join one of our key clients, on an urgent basis. This is a critical role requiring a deep understanding of front-end architecture, micro-frontend strategies, and enterprise-scale application development. As the React Architect, you will be responsible for defining the technical direction of the front-end ecosystem, establishing best practices, and ensuring the scalability, performance, and security of the banking platforms. 📍 Location: Wroclaw, Poland (Hybrid 3 days/week) ◽️ Employment Type: B2B Experience: 8+ years Must-have: 8+ years in software development Strong React.js (hooks, state management, lifecycle) TypeScript, JavaScript (ES6+) Micro-frontend architecture experience REST API integration Strong knowledge of design patterns and best practices/ Nice-to-have: Banking/finance domain experience Azure cloud knowledge Java/Spring Boot or .NET background Docker/Kubernetes Benefits ✅ Stable long-term cooperation with opportunity for extension Opportunity to work with modern technologies in an international environment Professional growth and continuous development opportunities Participation in challenging and impactful projects 📩 If you’re interested and meet the qualifications, please send your CV at alina.pchelnikova@dcvtechnologies.co.uk

🏢 Summary: B2B opportunity for an experienced .NET/C# and React Architect to lead end-to-end architecture of scalable, enterprise-grade web applications in a global environment. The role combines hands-on technical leadership across backend and frontend with ownership of architectural standards, scalability, security, and cloud-native solutions. You will guide distributed teams and shape long-term architectural direction in international projects. 🗂️ Requirements: Extensive experience with C# and .NET/.NET Core in enterprise environments, Strong expertise in React and modern frontend ecosystems, Experience designing distributed systems and microservices architectures, Experience designing and integrating RESTful APIs, Knowledge of TypeScript and state management libraries, Experience with CI/CD pipelines and DevOps practices, Cloud experience (Azure preferred), Understanding of UX/UI principles and responsive design, Ability to define architecture standards and conduct code reviews, Professional English proficiency 📃 Skills: C#, .NET, .NETCore, React, TypeScript, REST, Microservices, Azure, CI/CD, DevOps, APIs, UX, UI 🏢 Description: Location: Kraków, Poland (Hybrid) Contract Type: B2B Industry: Global organization / International projects Role Overview We are seeking an experienced .NET / C# & React Architect to lead the design and implementation of scalable, enterprise-grade web applications within a global environment. This role combines hands-on technical leadership with architectural ownership across backend and frontend domains, while ensuring strong alignment with UX/UI best practices. The successful candidate will define architectural standards, ensure system scalability and security, and support distributed development teams in delivering high-quality digital solutions. Key Responsibilities Define and oversee end-to-end solution architecture using C#, .NET (Core/6+) , and React Design scalable backend systems, APIs, and microservices using C# Establish frontend architecture standards, component strategies, and state management patterns Ensure performance, security, maintainability, and scalability across applications Align technical solutions with UX/UI best practices, accessibility, and responsive design Provide architectural guidance, conduct code reviews, and mentor development teams Collaborate with product, UX/UI, and global stakeholders Support cloud-native architecture and DevOps practices (Azure preferred) Required Skills & Experience Extensive experience with C# and .NET / .NET Core in enterprise environments Strong expertise in React and modern frontend ecosystems Proven experience designing distributed systems and microservices architectures Solid understanding of UX/UI principles and user-centered design Experience with RESTful APIs and system integrations Knowledge of TypeScript, state management libraries, and modern frontend tooling Experience with CI/CD pipelines and DevOps practices Cloud experience (Azure preferred) Strong communication skills in English Nice to Have Experience building or maintaining design systems Experience in global or distributed teams Strong background in performance optimization and security best practices What We Offer Long-term B2B engagement Competitive daily rate Participation in international, enterprise-scale projects Hybrid working model in Kraków Opportunity to shape architectural direction in a global organization If you meet the above criteria and are interested in long-term architectural ownership within a global environment, we encourage you to apply.

🏢 Summary: Backend engineering role focused on building scalable backend services, APIs, and internal developer platforms in a fully remote environment. The position involves improving system architecture, optimizing distributed systems, and collaborating across the full software development lifecycle. The offer includes influence on technical decisions, modern technologies, and growth opportunities within an experienced engineering team. 🗂️ Requirements: 5+ years of backend software development experience, Proficiency in PHP or experience with Java, Python, Go, Knowledge of RESTful APIs and GraphQL, Experience building scalable distributed backend systems, Experience with SQL/MySQL and database optimization, Experience with automated testing and monitoring, Knowledge of debugging production systems, Familiarity with contract-driven development, English for daily technical communication 📃 Skills: PHP, Java, Python, Go, REST, GraphQL, SQL, MySQL, React, API 🏢 Description: ✅ Your responsibilities: ・Design, develop, and maintain scalable backend services and APIs for third-party integrations. Improve platform architecture, service communication, and internal developer tooling. Collaborate with Product Managers, Designers, and Engineers throughout the entire software development lifecycle. Optimize existing systems for performance, scalability, reliability, and maintainability. Drive engineering best practices, including code quality, testing, and documentation. Participate in architecture discussions and technical decision-making. Mentor engineers through code reviews, pair programming, and knowledge sharing. Continuously improve the developer experience by building reliable internal platforms and tools. 🧠 Our requirements: 5+ years of experience in backend software development. Strong proficiency in PHP (preferred) or solid experience with Java, Python, Go , or similar backend technologies. Strong understanding of RESTful APIs , GraphQL , and API design best practices. Experience designing and building scalable, distributed backend systems. Hands-on experience with SQL/MySQL databases and database optimization. Experience with automated testing, observability, monitoring, and debugging production systems. Familiarity with contract-driven development and modern software development practices. Basic knowledge of frontend technologies such as React is a plus. Strong communication skills and the ability to collaborate across cross-functional teams. Passion for writing clean, maintainable, and high-quality code or AI automation English at a level allowing daily technical communication 🌟 What we offer: 100% remote work. Private healthcare and Multisport. Life insurance. Real influence on technical decisions and system architecture. Opportunity to build scalable backend services and developer platforms. Work with modern technologies in a collaborative engineering environment. Knowledge sharing, mentorship, and professional growth opportunities. Friendly, supportive, and experienced engineering team.

🏢 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.