Staff Front-End Engineer

🏢 Summary: Frontend engineering role focused on building scalable, high-performance web applications using React and Next.js. The position involves developing modern user interfaces, collaborating with cross-functional teams, and contributing to shared component architecture and development practices. Suitable for mid-level to senior developers with strong web development experience. 🗂️ Requirements: 5+ years frontend/web development experience, Strong experience with React, Strong experience with TypeScript, Experience with Next.js or similar framework, Understanding of performance and scalability principles, Experience integrating APIs and backend services, Experience with Git version control, Experience with CI/CD pipelines 📃 Skills: React, Next.js, TypeScript, JavaScript, HTML, CSS, REST, Git, CICD, Jest, Playwright, Cypress, Cloud 🏢 Description: Web Frontend Engineer (React / Next.js) Do you want to help shape modern, scalable web applications used by thousands of businesses worldwide? Our client is looking for a skilled frontend developer with a strong focus on web technologies — especially React and Next.js — to help drive the development of high-quality, user-centric solutions. About the Role In this role, you will play a key part in building and evolving our clients web-based user interfaces. You’ll work closely with product managers, UX designers, and backend engineers to deliver performant, scalable, and intuitive solutions that create real value for customers. We are looking for developers across different seniority levels — both experienced profiles and developers with 5–10 years of experience who are eager to grow and take ownership. Key Responsibilities Develop and maintain modern web applications using React, Next.js, and TypeScript Build reusable components and scalable frontend architecture Collaborate closely with product and design teams to translate requirements into high-quality user experiences Ensure performance, accessibility, and responsiveness across applications Contribute to and evolve shared component libraries and design systems Participate in code reviews and contribute to improving development practices Work with CI/CD pipelines and modern development workflows Stay updated on frontend trends, tools, and best practices Key Requirements Solid experience with React and TypeScript in a web context Experience with Next.js or similar frameworks is highly preferred 5+ years of experience in frontend/web development (we are open to mid-level and senior profiles) Strong understanding of modern web development principles (performance, scalability, component architecture) Experience working with APIs and integrating backend services Familiarity with version control (Git) and CI/CD pipelines A collaborative mindset and strong communication skills Motivation to learn, improve, and contribute to a strong engineering culture Nice to Have Experience with design systems and component libraries Knowledge of testing frameworks (e.g., Jest, Playwright, Cypress) Experience with performance optimization and monitoring Exposure to cloud environments and modern deployment setups

🏢 Summary: Senior Frontend Engineer role focused on building and scaling AI-powered Next.js applications with complex state management, real-time interactions, and enterprise-grade frontend architecture. The position involves owning frontend delivery, designing intuitive AI user experiences, and optimizing performance, accessibility, and scalability for high-load products. Hybrid full-time B2B engagement with a competitive salary range. 🗂️ Requirements: 5+ years of frontend engineering experience, 3+ years of React and TypeScript experience, Production experience with Next.js SSR applications, Knowledge of SSR, SSG, CSR trade-offs, Experience with complex state management, Experience building AI/LLM interfaces, Experience optimizing Core Web Vitals and frontend performance, Knowledge of localization, accessibility, security, and compliance, Security-conscious engineering approach, Experience using AI coding agents, Strong communication skills 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, JavaScript, LLM, AI, CoreWebVitals, Accessibility, Security, Localization, SemanticSearch, GraphQL 🏢 Description: Senior Frontend Engineer (React) 💰 Salary: $8000-$12,000 🕦 Full-time ☑️ B2B 🌴 Hybrid We are looking for a Senior Frontend Engineer to join a fast-growing AI product company's engineering team. The role sits at the crossroads of frontend architecture and product experience, owning both the delivery of business-critical Next.js applications and the design of intuitive, trustworthy user experiences for agentic AI products. Requirements Over 5 years of frontend engineering experience, including 3+ years specializing in React and modern TypeScript. Production Next.js experience: SSR applications at scale, app router, server components, and the trade-offs between SSR, SSG, and CSR. Complex state management for hard scenarios: real-time collaboration, optimistic updates, multi-tenant isolation, large-scale data sync. Experience building AI/LLM interfaces: streaming token responses, chat UIs, semantic search, or similar real-time AI interactions. High-load performance work: you monitor Core Web Vitals and know how to improve them under heavy traffic and large datasets. Enterprise application depth: localization, accessibility, security, and compliance, you understand the complexity beyond "making it work". A security-conscious approach to engineering: you handle sensitive data carefully and think about the security implications of what you ship. Strong craft and product instinct: you don't wait for perfect designs, you spot UX issues and propose solutions, and you're never satisfied with "good enough". AI-native working style. You already use AI coding agents daily and are eager to push the boundaries of harness engineering. Clear communication. You articulate design decisions and technical trade-offs clearly, verbally and in writing. Key Responsibilities Design and ship production Next.js SSR applications with complex state, high-load scenarios, and real-time AI interactions at scale. Build interfaces for AI-powered features: streaming LLM responses, semantic search across millions of documents, interactive knowledge graphs, and agentic builders. Architect component libraries and maintain the design system, ensuring reusability, accessibility, and consistent UX across the platform. Deliver enterprise-grade functionality: localization, accessibility compliance, cross-browser support, and security. Take full ownership after launch: monitor performance in production, optimize bundle sizes, instrument for Core Web Vitals, and ensure things scale gracefully. Keep the bar high on code quality, testing, and craft through thoughtful code review and mentorship.

🏢 Summary: Senior Frontend Security Engineer role focused on building and securing modern web applications using React and Next.js. The position centers on architecting security at the edge, implementing robust authentication and frontend protection mechanisms, and integrating with GCP-based microservices. It combines hands-on development, security automation, and technical leadership to enhance a large-scale security platform. 🗂️ Requirements: Minimum 7 years frontend development experience, Expertise in React and Next.js, Strong knowledge of frontend security vulnerabilities (XSS, CSRF, clickjacking, supply-chain attacks), Experience implementing OAuth2 and OpenID Connect authentication, Proficiency in TypeScript, Experience with unit and e2e testing, Experience with CI/CD pipelines, Experience integrating frontend with GCP microservices, Knowledge of REST, GraphQL, or gRPC APIs, Fluent English, Legal right to work in the EU 📃 Skills: React, Next.js, TypeScript, JavaScript, OAuth2, OpenIDConnect, CSP, XSS, CSRF, GraphQL, REST, gRPC, GCP, Cypress, Playwright, CI/CD, Angular, Vue 🏢 Description: Unleash the Future of Web Security — Shape Seamless, Safe User Experiences! Krakow-based opportunity with hybrid work model (up to 3 days remote per week). As a Senior Frontend Security Engineer – React/Next.js , you will be working for our client, a leader in innovative software security solutions. Your expertise will drive the adoption of engineering excellence across a cutting-edge security platform, transforming the way web applications safeguard user data and interactions. This role offers a unique chance to impact security architecture at the edge, ensuring seamless and secure digital experiences for thousands of users. Your main responsibilities: Develop and deliver high-quality, production-ready code with a focus on React Server Components (RSC), Server Actions, and Partial Pre-rendering (PPR). Architect and implement 'Security at the Edge' layers within Next.js to protect user interactions and enhance security posture. Build and maintain Content Security Policies (CSP), secure cookie management, and robust authentication flows using OAuth2/OpenID Connect. Prevent frontend vulnerabilities such as XSS, CSRF, and clickjacking through architectural best practices. Connect frontend architectures to GCP-based microservices via type-safe API contracts utilizing REST, GraphQL, or gRPC. Mentor teams on security best practices and foster a culture of quality, efficiency, and continuous improvement. Lead efforts to automate security checks and optimize developer workflows for agility and security. Stay up-to-date with evolving frontend and security trends, sharing insights and guiding teams toward innovative solutions. You're ideal for this role if you have: At least 7 years of experience in frontend development, with deep expertise in React, Angular, or Vue. Proven track record of mitigating security vulnerabilities at the code level, especially XSS, CSRF, and supply-chain attacks. Strong proficiency in TypeScript, unit/e2e testing (e.g., Cypress, Playwright), and CI/CD processes. Experience connecting frontend systems to GCP microservices with type-safe API contracts (REST, GraphQL, gRPC). Demonstrated leadership in guiding engineering teams and influencing technology direction. Broad technical skill set with the ability to apply the right tools for complex problems. Passion for building better, faster, and safer solutions that make a real difference. It is a strong plus if you have: Experience architecting solutions that identify and solve operational problems or opportunities. Respected reputation for quality development and impactful contributions. Holistic problem-solving mindset with a focus on long-term impact. Language required for the role: Fluent English, both written and spoken. Eligibility to work on this role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Frontend Security Engineer role focused on building and securing React/Next.js applications with advanced edge security architecture. The position involves implementing secure frontend solutions, integrating with GCP microservices, and preventing common web vulnerabilities. It offers a hybrid work model in Krakow with significant impact on web application security at scale. 🗂️ Requirements: Minimum 7 years of frontend development experience, Expert knowledge of React and modern frontend frameworks, Strong experience with Next.js including RSC and Server Actions, Proven experience mitigating XSS, CSRF, and supply-chain attacks, Strong proficiency in TypeScript, Experience with unit and end-to-end testing, Experience with CI/CD pipelines, Experience integrating frontend with GCP microservices, Fluent English, Legal right to work in the EU 📃 Skills: React, Next.js, TypeScript, JavaScript, Angular, Vue, GCP, REST, GraphQL, gRPC, OAuth2, OpenID, Cypress, Playwright, CI/CD, CSP 🏢 Description: Unleash the Future of Web Security — Shape Seamless, Safe User Experiences! Krakow-based opportunity with hybrid work model (up to 3 days remote per week). As a Senior Frontend Security Engineer – React/Next.js , you will be working for our client, a leader in innovative software security solutions. Your expertise will drive the adoption of engineering excellence across a cutting-edge security platform, transforming the way web applications safeguard user data and interactions. This role offers a unique chance to impact security architecture at the edge, ensuring seamless and secure digital experiences for thousands of users. Your main responsibilities: Develop and deliver high-quality, production-ready code with a focus on React Server Components (RSC), Server Actions, and Partial Pre-rendering (PPR). Architect and implement 'Security at the Edge' layers within Next.js to protect user interactions and enhance security posture. Build and maintain Content Security Policies (CSP), secure cookie management, and robust authentication flows using OAuth2/OpenID Connect. Prevent frontend vulnerabilities such as XSS, CSRF, and clickjacking through architectural best practices. Connect frontend architectures to GCP-based microservices via type-safe API contracts utilizing REST, GraphQL, or gRPC. Mentor teams on security best practices and foster a culture of quality, efficiency, and continuous improvement. Lead efforts to automate security checks and optimize developer workflows for agility and security. Stay up-to-date with evolving frontend and security trends, sharing insights and guiding teams toward innovative solutions. You're ideal for this role if you have: At least 7 years of experience in frontend development, with deep expertise in React, Angular, or Vue. Proven track record of mitigating security vulnerabilities at the code level, especially XSS, CSRF, and supply-chain attacks. Strong proficiency in TypeScript, unit/e2e testing (e.g., Cypress, Playwright), and CI/CD processes. Experience connecting frontend systems to GCP microservices with type-safe API contracts (REST, GraphQL, gRPC). Demonstrated leadership in guiding engineering teams and influencing technology direction. Broad technical skill set with the ability to apply the right tools for complex problems. Passion for building better, faster, and safer solutions that make a real difference. It is a strong plus if you have: Experience architecting solutions that identify and solve operational problems or opportunities. Respected reputation for quality development and impactful contributions. Holistic problem-solving mindset with a focus on long-term impact. Language required for the role: Fluent English, both written and spoken. Eligibility to work on this role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior Frontend Security Engineer role focused on building secure, production-ready React/Next.js applications with advanced edge security architecture. The position centers on implementing security best practices, preventing frontend vulnerabilities, and integrating secure frontend systems with GCP-based microservices. This role combines hands-on development, security automation, and technical leadership in a hybrid Krakow-based setup. 🗂️ Requirements: Minimum 7 years of frontend development experience, Deep expertise in React and modern frontend frameworks, Strong proficiency in TypeScript, Experience with React Server Components, Server Actions, and Partial Pre-rendering, Proven experience mitigating XSS, CSRF, and supply-chain attacks, Experience implementing OAuth2/OpenID Connect authentication flows, Experience building and enforcing Content Security Policies, Experience integrating frontend with GCP microservices, Experience with REST, GraphQL, or gRPC APIs, Experience with unit and end-to-end testing frameworks, Experience with CI/CD processes, Fluent English, Legal right to work in the European Union 📃 Skills: React, Next.js, TypeScript, JavaScript, Angular, Vue, Cypress, Playwright, CI/CD, OAuth2, OpenID, CSP, REST, GraphQL, gRPC, GCP, XSS, CSRF 🏢 Description: Unleash the Future of Web Security — Shape Seamless, Safe User Experiences! Krakow-based opportunity with hybrid work model (up to 3 days remote per week). As a Senior Frontend Security Engineer – React/Next.js , you will be working for our client, a leader in innovative software security solutions. Your expertise will drive the adoption of engineering excellence across a cutting-edge security platform, transforming the way web applications safeguard user data and interactions. This role offers a unique chance to impact security architecture at the edge, ensuring seamless and secure digital experiences for thousands of users. Your main responsibilities: Develop and deliver high-quality, production-ready code with a focus on React Server Components (RSC), Server Actions, and Partial Pre-rendering (PPR). Architect and implement 'Security at the Edge' layers within Next.js to protect user interactions and enhance security posture. Build and maintain Content Security Policies (CSP), secure cookie management, and robust authentication flows using OAuth2/OpenID Connect. Prevent frontend vulnerabilities such as XSS, CSRF, and clickjacking through architectural best practices. Connect frontend architectures to GCP-based microservices via type-safe API contracts utilizing REST, GraphQL, or gRPC. Mentor teams on security best practices and foster a culture of quality, efficiency, and continuous improvement. Lead efforts to automate security checks and optimize developer workflows for agility and security. Stay up-to-date with evolving frontend and security trends, sharing insights and guiding teams toward innovative solutions. You're ideal for this role if you have: At least 7 years of experience in frontend development, with deep expertise in React, Angular, or Vue. Proven track record of mitigating security vulnerabilities at the code level, especially XSS, CSRF, and supply-chain attacks. Strong proficiency in TypeScript, unit/e2e testing (e.g., Cypress, Playwright), and CI/CD processes. Experience connecting frontend systems to GCP microservices with type-safe API contracts (REST, GraphQL, gRPC). Demonstrated leadership in guiding engineering teams and influencing technology direction. Broad technical skill set with the ability to apply the right tools for complex problems. Passion for building better, faster, and safer solutions that make a real difference. It is a strong plus if you have: Experience architecting solutions that identify and solve operational problems or opportunities. Respected reputation for quality development and impactful contributions. Holistic problem-solving mindset with a focus on long-term impact. Language required for the role: Fluent English, both written and spoken. Eligibility to work on this role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Opportunity for a Senior Front-End Developer to modernize and scale an existing web interface using React and Next.js. The role focuses on building high-quality, responsive UI components, integrating with backend services, and driving front-end architecture and best practices. You will collaborate with backend and data teams while ensuring performance, scalability, and code quality. 🗂️ Requirements: Minimum 5 years of hands-on experience with React and Next.js, Strong proficiency in JavaScript and TypeScript, Strong knowledge of HTML and CSS, Experience with RESTful APIs integration, Understanding of modern front-end architecture and design patterns, Experience with front-end testing frameworks, Experience with build tools, Ability to troubleshoot and resolve UI and performance issues 📃 Skills: React, Next.js, JavaScript, TypeScript, HTML, CSS, REST, gRPC-Web, CI/CD, Testing 🏢 Description: Senior Front-End Developer (React / Next.js) We are looking for a Front-End Developer to join a technology-focused team working on modern web applications. This role will play a key part in transforming an existing user interface into a modern, scalable front-end built with React and Next.js. You will be responsible for delivering responsive, high-quality user interfaces and contributing to the long-term evolution of the UI platform. The position involves close collaboration with backend and data teams, as well as ownership of front-end standards and best practices within the team. Responsibilities Redesign and modernize an existing web interface using React and Next.js Build reusable, maintainable UI components with TypeScript Act as a front-end subject matter expert, supporting ongoing improvements to usability and performance Integrate front-end applications with backend services via REST APIs (gRPC-Web knowledge is a plus) Identify, troubleshoot, and resolve UI and performance issues Contribute to code reviews, technical discussions, and CI/CD processes Ensure high code quality through testing, documentation, and adherence to best practices Required Skills & Experience Min. 5 years of hands-on experience with React and Next.js Strong proficiency in JavaScript/TypeScript, HTML, and CSS Solid understanding of modern front-end architecture and development patterns Experience working with RESTful APIs Familiarity with front-end testing frameworks and build tools is an advantage Experience in finances/banking - nice to have

🏢 Summary: Senior Front-End Engineer role focused on building scalable, responsive enterprise web applications using React and modern front-end technologies. The position involves collaborating with UX, product, and backend teams, leading front-end architecture decisions, optimizing performance, and mentoring engineers in an Agile environment. Hybrid work near Fort Lauderdale, FL with emphasis on clean architecture, reusable UI systems, and enterprise-grade user experiences. 🗂️ Requirements: 8+ years developing enterprise front-end applications, 3+ years advanced React.js experience, Proficiency in JavaScript, HTML5, CSS3, Experience with responsive CSS frameworks, Knowledge of component-driven architecture and scalable front-end design, Experience with wireframes, prototypes, and UI design tools, Front-end performance optimization experience, Proficiency with Git and version control workflows, Knowledge of code reviews, testing, debugging, and maintainable architecture, Ability to work in Agile/Scrum environments, Authorization to work in the U.S., Residence in Florida 📃 Skills: React, JavaScript, HTML5, CSS3, Redux, Zustand, Tailwind, Bootstrap, MaterialUI, Figma, AdobeXD, Sketch, Git, Next.js, TypeScript, Jest 🏢 Description: About the Role The Senior Front-End Engineer role is an opportunity to build modern, responsive web applications that deliver exceptional user experiences for enterprise customers. You'll collaborate with designers, product leaders, and backend engineers to transform ideas into intuitive, scalable interfaces while influencing both technical direction and user experience. This position is ideal for someone who enjoys owning the front-end architecture, mentoring teammates, and delivering polished applications that perform at scale. What You'll Do - Design and develop modern, responsive web applications using React and contemporary front-end development practices. - Partner closely with UX designers, product managers, and backend engineers to translate business requirements into intuitive user interfaces. - Convert wireframes, prototypes, and visual concepts into clean, maintainable, production-ready code. - Build reusable UI components and scalable design patterns that promote consistency across applications. - Champion performance optimization techniques to ensure fast, responsive, and reliable user experiences. - Create interfaces that are accessible, responsive, and compatible across modern browsers and devices. - Participate throughout the full front-end development lifecycle, from solution design through deployment and ongoing enhancements. - Conduct peer code reviews, share technical knowledge, and mentor junior engineers on development standards and best practices. - Promote clean architecture, automated testing, maintainable code, and continuous improvement within the engineering team. - Collaborate in Agile ceremonies and contribute to technical planning, estimation, and solution design. What You'll Bring - 8+ years of professional experience developing enterprise front-end applications. - 3+ years advanced expertise with React.js, including functional components, Hooks, Context API, and modern state management approaches such as Redux/Zustand. - 2–3+ years of hands-on involvement with UI/UX design, user-centered design principles, or close collaboration with design teams. - Strong proficiency with JavaScript (ES6+), HTML5, CSS3, responsive layouts, and modern browser capabilities. - Experience developing responsive interfaces using CSS frameworks such as Tailwind CSS, Bootstrap, or Material UI. - Solid understanding of component-driven architecture, reusable design systems, and scalable front-end application design. - Experience creating or working from wireframes, prototypes, mockups, and interactive designs using tools such as Figma, Adobe XD, or Sketch. - Strong knowledge of UI design fundamentals, including typography, spacing, color theory, layout, and usability. - Experience optimizing front-end performance through techniques such as lazy loading, code splitting, rendering optimization, and efficient state management. - Proficiency with Git, collaborative version control workflows, and modern software development practices. - Strong understanding of software quality practices, including code reviews, debugging, testing, and maintainable application architecture. - Excellent communication skills with the ability to collaborate effectively across engineering, product, and design teams. Nice to Have - Experience with Next.js and server-side rendering. - Working knowledge of TypeScript. - Familiarity with WCAG accessibility standards and inclusive design practices. - Experience with automated testing frameworks such as Jest and React Testing Library. - Experience working within Agile/Scrum delivery environments. - Previous experience mentoring developers or serving as a technical lead on front-end initiatives. Location - Hybrid role: 3 days onsite and 2 days remote near Fort Lauderdale, FL. - Applicants must be authorized to work for any employer in the U.S. - Candidates must reside in Florida. Compensation and Benefits - Estimated compensation range: $40–$50 USD. - Eligible for discretionary bonuses, commissions, and incentive programs. - Comprehensive benefits package including medical, dental, vision, 401(k), and paid time off. ADA Specifications - Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions of this position.

🏢 Summary: Frontend Engineer role focused on building production-grade Next.js applications with real-time AI interactions, semantic search, and interactive knowledge graphs for enterprise-scale AI software products. The position involves working with React and TypeScript, contributing to design systems, optimizing frontend performance, and supporting accessibility and security requirements. Candidates will also use AI coding assistants in daily workflows and maintain high standards for code quality and test coverage. 🗂️ Requirements: 3-5 years frontend engineering experience, React, TypeScript, Next.js, SSR/SSG/CSR knowledge, State management, Real-time UI updates, AI/LLM interface experience, Semantic search interfaces, Frontend performance optimization, Core Web Vitals, Accessibility, Localization, Security practices, Cross-browser compatibility, AI coding assistants, Code review, Test coverage, Technical communication 📃 Skills: React, TypeScript, Next.js, SSR, SSG, CSR, LLM, AI, SemanticSearch, CoreWebVitals, Accessibility, Security, Localization, ReactFlow, Highcharts, MCP, DSPy, Node.js, Python, RAG 🏢 Description: Frontend Engineer (React) 💰 Salary: 5,000-7,000 USD per month 🌎 Hybrid, 1 day remote ☑️ Full-time 🕦 B2B We're looking for a Frontend Engineer for a leading enterprise AI software provider. You'll build production Next.js applications with real-time AI interactions, including streaming LLM responses, semantic search, and interactive knowledge graphs. You'll also contribute to the design system, handle enterprise requirements such as accessibility and security, and own post-launch performance. The team serves enterprise customers at scale, maintains SOC 2 compliance with HIPAA-ready security, and uses AI coding assistants daily in their development process. Requirements 3-5 years in frontend engineering, with solid React and modern TypeScript skills Hands-on Next.js production experience, having shipped SSR applications and understanding the trade-offs among SSR, SSG, and CSR Strong grasp of state management, including some exposure to real-time updates, optimistic UI, or multi-tenant data Prior work on AI/LLM interfaces, such as streaming responses, chat UIs, or semantic search Practical understanding of frontend performance, including Core Web Vitals and common optimization methods Some background in enterprise application needs: localization, accessibility, security practices A security-minded approach to development, with care around sensitive data and awareness of security implications Solid product and UX judgment, able to spot issues and propose fixes Regular use of AI coding assistants as part of daily workflow Ability to explain design and technical decisions clearly, both in writing and verbally Nice to Have Experience with React Flow, Highcharts, or similar data-visualization libraries Direct experience with vector search UIs, RAG interfaces, or semantic search systems Familiarity with MCP, DSPy, or other current AI frameworks, and experience building agentic AI interfaces Basic understanding of Node.js/Python backend concepts, enough to read backend code and participate in API design discussions Past contributions to design systems or open-source component libraries Responsibilities Design and deploy production-ready Next.js applications handling complex state and live AI interactions Develop interfaces for AI features, including streaming LLM output, semantic search, interactive knowledge graphs, and agentic builders Support and extend the component library and design system, ensuring reusability, accessibility, and consistency Handle enterprise-level requirements such as localization, accessibility, cross-browser compatibility, and security practices Take responsibility for shipped features after launch: track performance, reduce bundle size, and monitor Core Web Vitals Apply AI tools in daily work to increase speed, and contribute to improving internal frontend processes Uphold high standards for code quality and test coverage via careful code review

🏢 Summary: Senior Front End Engineer role focused on building high-performance web applications for a fast-paced financial environment using modern frontend technologies and real-time data solutions. The position involves developing scalable interfaces, collaborating with cross-functional teams, and optimizing application performance and code quality. 🗂️ Requirements: 5+ years of Front End development experience, Strong knowledge of React, Strong knowledge of Next.js, Strong knowledge of TypeScript, Experience with WebSockets, Experience with AG Grid, Experience with Jest, Experience with React Testing Library, Experience with Playwright, Familiarity with Git, Familiarity with CI/CD, Experience with AI-assisted development tools, Fluent English 📃 Skills: React, Next.js, TypeScript, WebSockets, AG, Grid, Jest, Playwright, Git, CI/CD 🏢 Description: Senior Front End Engineer We are looking for an experienced Front End Engineer to build modern, high-performance web applications used in a fast-paced financial environment. You will work closely with backend engineers and business stakeholders to deliver scalable, user-friendly solutions with a strong focus on real-time data and application performance. Responsibilities - Develop and maintain web applications using React, Next.js, and TypeScript. - Build reusable UI components and real-time data interfaces. - Collaborate with cross-functional teams to deliver business solutions. - Optimize performance and ensure code quality through testing and best practices. Requirements - 5+ years of experience in Front End development. - Strong knowledge of React, Next.js, and TypeScript. - Experience with WebSockets, AG Grid, and modern testing frameworks (Jest, React Testing Library, Playwright). - Familiarity with Git, CI/CD, and modern development practices. - Experience working with AI-assisted development tools. - Fluent English.

🏢 Summary: Staff Engineer role focused on leading the design, evolution, and reliability of a high-scale distributed backend platform that generates and distributes real-time customer offers. The position combines deep hands-on backend engineering with architectural leadership in event-driven systems. It emphasizes scalability, performance, observability, and operational excellence in a complex production environment. 🗂️ Requirements: Experience owning complex backend systems end-to-end in scalable production environments, Proven experience designing and operating distributed systems, Strong backend engineering expertise in Java, Solid understanding of JVM performance, Hands-on experience with Apache Kafka, Hands-on experience with Spring Boot and/or Vert.x, Hands-on experience with Redis, Hands-on experience with OpenSearch or Elasticsearch, Experience with observability tools such as Datadog, Grafana, or Kibana, Strong system design skills in event-driven and asynchronous architectures, Knowledge of concurrency and non-blocking system design, Experience with scalability, resiliency, and fault-tolerance strategies, Experience debugging production incidents in distributed environments 📃 Skills: Java, JVM, Kafka, Spring, Vert.x, Redis, OpenSearch, Elasticsearch, Datadog, Grafana, Kibana, Kubernetes 🏢 Description: ABOUT THE ROLE We are looking for a passionate and highly experienced Staff Backend Engineer to help lead the design, development, reliability, and evolution of a complex distributed backend platform. This role is ideal for someone who enjoys going deep into understanding both the technical and business context behind problems, not just implementing solutions mechanically. We value engineers who are curious, proactive, and driven by learning - people who enjoy experimenting, challenging assumptions, and troubleshooting complex systems until the root cause is fully understood. As a Staff Backend Engineer, you will provide technical leadership across architecture, engineering practices, and platform evolution while remaining hands-on when needed. You will help teams make better technical decisions, raise engineering standards, simplify complex systems, and create solutions that balance business needs with long-term platform health. We're looking for someone who is comfortable working in ambiguity, treats failure as an opportunity to learn, welcomes constructive feedback, and leads through collaboration, ownership, and execution rather than authority. ABOUT YOUR FUTURE PLATFORM TEAM We build and operate a critical backend platform that generates, validates, and distributes customer-facing offers across multiple markets in real time. The system sits at the intersection of pricing, configuration, compliance, and localization - where milliseconds matter, correctness is non-negotiable, and small mistakes can have large-scale impact. Our systems apply complex configuration and licensing rules, handle market and event-level blocking, manage multi-language localization, and transform raw pricing data into customer-ready offers consumed across the ecosystem. We process high-throughput event streams, deal with constantly changing data, and solve problems that require both strong engineering fundamentals and deep domain understanding. Success means no incorrect or missing offers in production, near real-time reflection of pricing and configuration changes, fully compliant offers across jurisdictions, and seamless multi-language experiences for customers. Our ecosystem is built around: Event streaming and backbone: Apache Kafka Backend services: Java 23+ with Spring Boot and Vert.x (we are continuously evolving toward highly reactive, asynchronous, and event-driven architecture) State and performance optimization: Redis Search and analytics: OpenSearch / Elasticsearch Observability and operations: Datadog, Grafana, Kibana Runtime and scalability: Kubernetes-based containerized infrastructure We are actively evolving our platform toward more reactive, asynchronous, and event-driven architectures, making this an exciting environment for engineers who enjoy distributed systems, performance, concurrency, and real-time data processing challenges. WHAT YOU'LL DO Technical Leadership Leading architecture and design discussions for scalable, resilient distributed systems Collaborating with Architects and senior engineers to define solution approaches and evaluate new technologies through spikes and PoCs Improving and simplifying existing system designs while maintaining high engineering standards for performance, correctness, and maintainability Maintaining a strong engineering bar across quality, scalability, and maintainability Platform Reliability & Engineering Excellence Proactively identifying scalability, reliability, and performance risks across the platform Leading debugging and root cause analysis for complex production incidents Improving observability, monitoring, alerting, and operational readiness Driving technical debt reduction and continuous platform improvement Promoting best practices across event-driven systems, resiliency patterns, performance optimization, testing, automation, and CI/CD Team Enablement & Collaboration Supporting day-to-day technical coordination within the team and contributing to incident handling and engineering discussions Mentoring engineers through design reviews, code reviews, and hands-on technical guidance Supporting cross-team collaboration and helping troubleshoot integration and platform issues Encouraging a culture of collaboration, clarity, and shared ownership Actively participating in engineering communication channels and helping unblock others Delivery & Execution Working closely with Product, Engineering Managers, and Architects to translate ideas into executable technical solutions Helping define and break down EPICs and technical initiatives in Jira Driving clarity in ambiguous or complex technical initiative Ensuring alignment between short-term delivery needs and long-term platform evolution WHAT WE'RE LOOKING FOR Required Experience: Experience owning complex backend systems end-to-end in scalable production environments Proven experience designing and operating distributed systems Strong backend engineering expertise in Java, with solid understanding of JVM performance Hands-on experience with: Apache Kafka and event-driven architectures Spring Boot and/or Vert.x Redis for low-latency and stateful use cases OpenSearch / Elasticsearch for querying and analytics Observability tools such as Datadog, Grafana, or Kibana Strong system design skills, including: Event-driven and asynchronous architectures Concurrency and non-blocking system design Scalability, resiliency, and fault-tolerance strategies Evaluating trade-offs between latency, throughput, and consistency Experience debugging production incidents in distributed environments Strong communication skills and ability to influence technical decisions across teams Proactive mindset with strong ownership and accountability Comfortable working in complex, fast-paced engineering environments Collaborative approach and willingness to support and mentor others Nice to Have: Kubernetes and cloud-native infrastructure experience Experience building internal platforms or shared engineering frameworks SRE mindset and operational excellence practices Experience with real-time or high-throughput data systems Experience leading cross-team technical initiatives WHAT SUCCESS LOOKS LIKE Teams rely on you for technical direction and practical problem-solving The platform becomes more reliable, scalable, and easier to operate over time Production incidents decrease due to proactive engineering and improved system design Cross-team dependencies are better coordinated and easier to manage Engineering quality and consistency improve across services and squads Engineers grow technically through your mentorship and guidance WHAT WE OFFER Competitive salary aligned with your experience, expertise, and impact A collaborative, inclusive, and fast-paced engineering environment where ideas are welcomed, ownership is encouraged, and continuous learning is valued Hybrid work policy 4 weeks of Workation (T&C apply) Benefits package - 800 PLN net (B2B)/gross (UOP) monthly with access to the cafeteria platform (private medical care, insurances, sports card) Training budget ICAS assistance program that can provide help and guidance during challenging moments. Our office provides complimentary snacks and drinks; on Mondays, we serve complimentary breakfast. Team and office social events throughout the year Free parking for bicycles and motorcycles Free gym in the building Equipment: MacBook Pro + smartphone (iPhone 16/17 or Samsung Galaxy S25)