Mobile Developer - React Native

🏢 Summary: The role focuses on integrating React Native solutions into an existing native iOS/Android mobile platform, designing architecture and implementing hybrid modules within a mature codebase. The position involves bridging React Native and native layers, optimizing performance, and contributing to scalable, maintainable mobile architecture. 🗂️ Requirements: Strong commercial experience with React Native, Experience in native mobile development (iOS and/or Android), Understanding of mobile application architecture, Experience integrating React Native with native applications, Ability to implement cross-layer communication and bridging, Experience with navigation and state management, Familiarity with CI/CD processes and build tools, Focus on code quality and performance optimization 📃 Skills: React, ReactNative, JavaScript, TypeScript, iOS, Android, Swift, Kotlin, Objective-C, Java, CI/CD, Git, Xcode, Gradle 🏢 Description: We are looking for an experienced React Native Developer to support the integration of React Native solutions into an existing native mobile platform (iOS/Android). Responsibilities: Designing and implementing an architectural approach to combine React Native components with the native application Analyzing the current mobile architecture and identifying optimal integration points Implementing and developing React Native modules within the existing native codebase Ensuring scalability, performance, and maintainability of the solution Handling communication between native and React Native layers (data flow, bridging) Contributing to and optimizing build/deployment processes Maintaining high code quality and alignment with platform standards Close collaboration with iOS and Android teams to ensure smooth integration of new features Requirements: Strong knowledge of React Native with proven commercial experience Experience in native mobile development (iOS and/or Android) Solid understanding of mobile application architecture Experience integrating hybrid solutions with native applications Ability to work with navigation, state management, and cross-layer communication Familiarity with CI/CD processes and build tools Strong focus on code quality, performance, and readability Good teamwork and communication skills Nice to have: Experience working with large, existing mobile systems Knowledge of mobile performance optimization best practices Experience working in Agile environments We offer: Opportunity to work on a modern mobile platform Collaboration with an experienced development team Real impact on architecture and product direction Flexible working conditions

🏢 Summary: Engineering Manager role focused on leading the architecture and development of scalable, low-latency web-based trading platforms across the full software lifecycle. The position combines hands-on technical leadership with team management, driving performance, scalability, and innovation in mission-critical applications. Work is delivered in an Agile environment with hybrid onsite presence. 🗂️ Requirements: Minimum 7 years web-based development experience, Proven experience leading and mentoring software engineering teams, Strong JavaScript and TypeScript expertise, Advanced knowledge of React and modern frontend architecture, Solid HTML and CSS knowledge including cross-browser compatibility and accessibility, Experience delivering end-to-end projects in Agile environments, Experience with performance optimization across build and runtime phases, Knowledge of event-driven microservices architecture, Experience with Java and Spring or C# and .NET Core, Experience with distributed systems and messaging platforms, Experience with relational and NoSQL databases, BS/MS in Computer Science, Engineering or related field 📃 Skills: JavaScript, TypeScript, React, HTML, CSS, Java, Spring, CSharp, NETCore, Docker, Kubernetes, Azure, GCP, AWS, Kafka, SQL, NoSQL, Agile, TDD, BDD, Jest, JUnit, Microservices 🏢 Description: Overview Permanent, full-time, hybrid. Connecting clients to markets – and talent to opportunity With 5,400+ employees and over 80,000 institutional, commercial, and payments clients, we operate from more than 80 offices spread across six continents. As a Fortune 100, Nasdaq-listed provider, we connect clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors. Whether you want to forge a career connecting our retail clients to potential trading opportunities, or ingrain yourself in the world of institutional investing, StoneX Group is made up of four business segments that offer endless potential for progression and growth. Corporate: Engage in a deep variety of business-critical activities that keep our company running efficiently. From strategic marketing and financial management to human resources and operational oversight, you’ll have the opportunity to optimize processes and implement game-changing policies. Responsibilities Position Purpose: We are looking for an Engineering Manager with experience building scalable web-based trading platforms. The role will encompass architecture and development across all tiers of the application stack. You will be part of a talented engineer team that work on low-latency mission-critical trading applications. Roles and responsibilities include application architecture and development across full software development lifecycle, collaborating with like-minded engineers. Managing and technically leading team of highly skilled software engineers, forging relationships with key stakeholders across diverse user base. Primary Duties will include: Lead and mentor team(s) of skilled software engineers, providing architectural and technical guidance. Own and evolve the architecture roadmap, ensuring scalability, performance, and maintainability. Drive development across all phases of the software lifecycle using Agile methodologies. Ensure design and implementation align with business and technical specifications. Oversee release planning and delivery of software components. Champion continuous improvement by evaluating emerging technologies and presenting recommendations. Build strong relationships with cross-functional stakeholders to align engineering efforts with business goals. Foster a culture of excellence, ownership, and innovation within the team. Qualifications To land this role you will need: Minimum 7 years’ experience in web-based development. Proven experience building and leading technical teams, providing direction and guidance, working with global teams. Deliver end-to-end technical projects, coordinating multiple delivery teams across a range of disciplines and geographical locations, working in an Agile manner. Strong knowledge with JavaScript and Typescript, asynchronous programming, closures, types, ES6. HTML/CSS experience, covering layout, cross browser compatibility, accessibility. Knowledge with React framework, lazy loading, error capturing, concurrent mode, code splitting, patterns for code reuse, state management libraries, routing architecture. Performance improvement on various phases of development, build, deployment runtime, edge cache, cache control header, enabling gzip, transport on h2, rendering optimizations. Ideally experience developing event-based microservices using Java/Spring (ideal) or C#/.Net Core. What makes you stand out: Experience with TDD/BDD, testing framework (Jest/React-testing-library/JUnit). Some experience developing distributed systems using Microservice architecture (event-based). Experience with containerisation (Docker, Kubernetes). Experience with cloud platforms (Azure, GCP, AWS). Exposure with distributed messaging / streaming platforms (Apache Kafka ideal). Experience with Relational and No-SQL databases. Education: BS/MS degree in Computer Science, Engineering or a related subject Environment: Hybrid (4 days in office per week).

🏢 Summary: Mid+/Senior Mobile Developer role focused on building and maintaining a complex React Native application for Android and iOS. The position involves delivering high-performance, user-centric mobile solutions with features like geolocation, EV charging integration, and CarPlay support. You will collaborate cross-functionally to ensure code quality, stability, and scalable mobile architecture. 🗂️ Requirements: 4+ years commercial mobile development experience, Expert knowledge of React Native, Strong JavaScript proficiency, Strong TypeScript proficiency, Experience with REST or GraphQL APIs, Deep understanding of mobile build and release processes, Experience publishing to App Store or Google Play, Knowledge of mobile testing practices, Ability to design mobile application architecture 📃 Skills: ReactNative, JavaScript, TypeScript, REST, GraphQL, Android, iOS, Kotlin, Java, Swift, CICD, CarPlay, Geolocation, AppStore, GooglePlay 🏢 Description: Tech stack: React Native mobile ecosystem JavaScript TypeScript REST/GraphQL Requirements: 4+ years of commercial experience in mobile development (Android and/or iOS). Expert-level knowledge of React Native . A "mobile-first" mindset with experience in building complex mobile applications. Deep understanding of the mobile ecosystem (build processes, testing, and store publication). Strong proficiency in JavaScript and TypeScript . Experience integrating with APIs ( REST / GraphQL ). Strong problem-solving skills and the ability to work effectively both independently and in a team. About the Role: We are looking for an experienced Mobile Developer (Mid+ or Senior level) with at least 4 years of commercial experience in building mobile applications for Android and/or iOS. The ideal candidate is a mobile-first specialist—we are looking for someone whose expertise is rooted deeply in the mobile ecosystem rather than web development. You should have a strong command of React Native and a passion for creating high-performance, user-centric mobile experiences. The Project: You will join a project for a major international corporation in the energy and chemical sector . We are developing a modern mobile application for B2B and B2C users that manages fuel cards, loyalty programs, and exclusive discounts. The app has a real-world impact on the daily lives of drivers, supporting them on the road and through charging infrastructure. Key features include: User Management: Smooth B2B and B2C registration and login. Benefits: Fuel card management, loyalty rewards, and discount tracking. Maps & Geolocation: Searching for stations and points of interest. E-Mobility: Starting/stopping EV charging sessions directly from the app with real-time (live) status tracking. Advanced Features: CarPlay integration (MVP) and dynamic widgets for quick access to key information. Main responsibilities: Developing and maintaining mobile applications using React Native . Collaborating closely with the Product Team, Backend Developers, and UX/UI Designers. Ensuring high code quality, application performance, and stability. Actively participating in product roadmapping and technical decision-making. Conducting code reviews and sharing knowledge with the team Nice to Have Experience with native development : Kotlin/Java (Android) or Swift (iOS). Hands-on experience with native deployment (Google Play Store / App Store, certificates, provisioning, signing). Knowledge of CI/CD pipelines tailored for mobile apps. Experience in mobile performance optimization. Background in designing mobile application architecture.

🏢 Summary: The offer is for a Mobile Developer role focused on building and maintaining global-scale retail applications using React Native with elements of native Android and iOS development. The position involves transforming business requirements into mobile solutions, integrating with Salesforce and backend systems, and ensuring high-quality testing and documentation. The role includes collaboration with architects and engineers while contributing to the evolution of mobile development practices. 🗂️ Requirements: Proven experience in React Native development or React.js with Redux or JavaScript/TypeScript, Familiarity with mobile design and architecture patterns, Knowledge of clean coding practices, Experience with unit testing and integration testing, Knowledge of mobile application security best practices, Bachelor's Degree in Computer Science, English proficiency 📃 Skills: ReactNative, React, Redux, JavaScript, TypeScript, Android, iOS, Java, Kotlin, Swift, Objective-C, Salesforce, SalesCloud, NodeJS, UnitTesting, IntegrationTesting 🏢 Description: We are looking for passionate and ambitious IT professional to join a experienced and innovative team for Retail Execution - whereby you will grow as a Mobile Developer. You will be able to grow and develop your React Native skills with some flavor of native coding on Android and iOS, working on interesting and challenging mobile application which integrate with Salesforce and other backend systems. With support and directions from an Architect or Technical Lead you will take responsibility of transforming business requirements into real solutions - this includes developing, testing, documenting and supporting them. In your role you will cooperate with the Architects team and Engineering Leads, contributing to the design & development of various internal P&G applications and global-scaled solutions, while also participating and having tangible possibility to shape and grow Mobile Development competency in the organization. Key Responsibilities: Writing of high-quality source code to create complete applications and compilation of builds into test, staging and production environments Execution of unit tests, integration tests and non-functional tests before application release Fixing defects and bugs in existing code, close cooperation with application support teams Developing technical documents and handbooks to accurately represent application design and code and regular maintenance of those according to company standards Evaluation of existing solutions to rebuild, update or add new features Analyzing requirements and how they translate into application features We are looking for: Proven experience in React Native developments (alternatively React.js and Redux or JavaScript / Typescript ) Familiarity of design and mobile architecture patterns , as well as good / clean programming practices Familiarity of good unit testing and integration testing practices Knowledge of mobile applications security best practices The ability to work independently, as well as in a multifunctional team English proficiency and at least Bachelor's Degree in Computer Science Nice to have: Experience in native programming ( Java for Android , Kotlin or Swift / Objective-C ) Basic experience in Salesforce platform (specifically Sales cloud ) Experience in requirements gathering, analysis and working with business partners DevOps / Agile programming attitude Experience with Node.JS We offer P&G-sized projects and access to world leading IT partners and technologies from Day 1. Wide range of self-development possibilities (training and certifications paths). Competitive starting salary and benefits program (private health care, P&G stock, saving plans, sport cards). Regular salary increases and possible promotions - in line with your results and performance. Opportunity to change role every few years to be in the best place for you and best for P&G. At Procter & Gamble we embrace a hybrid work model that combines the flexibility of remote work with the collaborative benefits of in-office engagement. Employees can enjoy the option to work from home two days a week while also spending time in the office to foster teamwork and enhance communication. Watch this video to learn more about our full recruiting process: https://www.youtube.com/watch?v=0bicvbpy0gI Kindly be advised that at P&G, employment is exclusively extended on the basis of an "Umowa o Pracę" (Full-time Employment Contract). Apply only if you agree to these conditions. About us We produce globally recognized brands and we grow the best business leaders in the industry. With a portfolio of trusted brands as diverse as ours, it is paramount our leaders can lead with courage the vast array of brands, categories and functions. We serve consumers around the world with one of the strongest portfolios of trusted, quality, leadership brands, including Always®, Ariel®, Gillette®, Head & Shoulders®, Herbal Essences®, Oral-B®, Pampers®, Pantene®, Tampax® and more. Our community includes operations in approximately 70 countries worldwide. Visit http://www.pg.com to know more. We are an equal opportunity employer and value diversity at our company. We do not discriminate against individuals on the basis of race, color, gender, age, national origin, religion, sexual orientation, gender identity or expression, marital status, citizenship, disability, HIV/AIDS status, or any other legally protected factor.

🏢 Summary: Senior React Native Developer role focused on building and evolving a global mobile platform with digital services and loyalty programs used by millions of users. The position involves architectural decision-making, development of complex multi-module applications, native integrations, and mentoring within the team. The offer includes long-term cooperation, access to modern technologies, and a hybrid work model in Warsaw. 🗂️ Requirements: Minimum 5 years of commercial software development experience, At least 4 years of hands-on experience with React Native, Expert knowledge of TypeScript, Strong experience with modern JavaScript, Practical experience with MobX, Knowledge of React Query or TanStack Query, Experience with React Hooks, Experience building and maintaining native modules for iOS and Android, Experience working with REST API and GraphQL, Experience with CI/CD processes, English proficiency at minimum C1 level, Availability to work in hybrid mode (2 days per week in Warsaw office) 📃 Skills: React, ReactNative, TypeScript, JavaScript, MobX, ReactQuery, TanStackQuery, REST, GraphQL, CI/CD, iOS, Android 🏢 Description: Wspólnie z naszym Partnerem z sektora paliwowo-detalicznego poszukujemy doświadczonej osoby na stanowisko Senior React Native Developer . Projekt to globalna platforma mobilna z usługami cyfrowymi i programami lojalnościowymi, z której korzystają miliony użytkowników. Jej wielomodułowa architektura pozwala na ponowne wykorzystanie kodu i szybkie wdrażanie nowych funkcji. 💡 TWOJA ROLA Projektowanie, rozwój i utrzymanie złożonych aplikacji mobilnych w oparciu o React Native oraz TypeScript . Prowadzenie przeglądów kodu, mentoring zespołu oraz promowanie dobrych praktyk inżynierskich. Podejmowanie decyzji architektonicznych i rozwój wielomodułowej platformy mobilnej. Doskonalenie wydajności, niezawodności, skalowalności i utrzymywalności aplikacji. Prowadzenie dyskusji technicznych oraz współtworzenie projektów rozwiązań. Identyfikacja długu technologicznego i inicjowanie usprawnień w bazie kodu. Integracja natywnych funkcji mobilnych oraz usług zewnętrznych. 🔍 CZEGO OCZEKUJEMY OD CIEBIE? Co najmniej 5-letnie komercyjne doświadczenie w wytwarzaniu oprogramowania, w tym minimum 4 lata praktyki z React Native . Ekspercka znajomość TypeScript i nowoczesnego JavaScript oraz rozległe doświadczenie z MobX . Dobra znajomość React Query/TanStack Query , strategii synchronizacji danych oraz React Hooks Doświadczenie w tworzeniu i utrzymaniu modułów natywnych dla iOS oraz Android . Praca w trybie hybrydowym , dwa dni w tygodniu w biurze w Warszawie. Doświadczenie z REST API , GraphQL oraz procesami CI/CD . Znajomość języka angielskiego na poziomie co najmniej C1 . ✨ OFERUJEMY 🤖 Nowoczesny proces rekrutacji z AI Rekruterem (AIR) - podczas aplikacji możesz odbyć rozmowę z wirtualnym rekruterem 24/7, bez czekania na telefon. Dostajesz natychmiastowy feedback, a finalną decyzję zawsze podejmuje Rekruter Connectis. Uczestnictwo w spotkaniach integracyjnych oraz meetupach technologicznych, umożliwiających dzielenie się wiedzą i doświadczeniem. Wsparcie dedykowanej osoby kontaktowej z Connectis, dostępnej w celu pomocy w sprawach związanych z projektem. Rozwój kariery i długofalową współpracę w firmie o ugruntowanej pozycji na rynku. Dostęp do najnowszych technologii i narzędzi pracy. 5000 PLN za polecenie znajomego do projektów. Szybki i zdalny proces. Dziękujemy za wszystkie zgłoszenia. Informujemy, że skontaktujemy się wyłącznie z wybranymi osobami. 12933/MP

🏢 Summary: The offer is for a React Native Developer to design, implement, and optimize high-quality mobile applications for a Polish client. The role involves developing new features and maintaining existing products for both iOS and Android platforms. Work is primarily remote with occasional visits to Warsaw. 🗂️ Requirements: Minimum 3 years of experience in mobile application development, Strong knowledge of React Native for iOS and Android, Experience publishing and maintaining apps in App Store, Experience publishing and maintaining apps in Google Play, Ability to optimize mobile applications for performance on iOS and Android 📃 Skills: React, ReactNative, JavaScript, iOS, Android, AppStore, GooglePlay 🏢 Description: Dołącz do nas jako React Native Developer i twórz wysokiej jakości aplikacje mobilne dla polskiego klienta. Szukamy osoby, która sprawnie porusza się w ekosystemie iOS i Android. Zakres obowiązków: Projektowanie i implementacja aplikacji mobilnych w React Native. Optymalizacja aplikacji pod kątem wydajności na obu platformach (iOS/Android). Rozwój nowych funkcjonalności i utrzymanie istniejących produktów. Wymagania: Minimum 3 lata doświadczenia w tworzeniu aplikacji mobilnych. Bardzo dobra znajomość frameworka React Native dla iOS i Android. Doświadczenie w publikacji i utrzymaniu aplikacji w sklepach (App Store/Google Play). Praca zdalna z okazjonalnymi wizytami w Warszawie .

🏢 Summary: Senior React Native Developer role focused on designing, developing, and maintaining cross-platform mobile applications using React Native. The position involves building new features, optimizing performance, integrating backend services, and ensuring high code quality. It requires strong expertise in modern JavaScript/TypeScript and mobile development practices. 🗂️ Requirements: Minimum 4 years of mobile application development experience, At least 2 years of commercial experience with React Native, Strong knowledge of JavaScript (ES6+), Strong knowledge of TypeScript, Experience with state management (Redux or Context API), Experience integrating REST API or GraphQL, Experience publishing apps to App Store and Google Play, Ability to debug and optimize mobile applications, Experience with CI/CD tools, Experience with code reviews and applying best coding practices 📃 Skills: React, ReactNative, JavaScript, TypeScript, Redux, ContextAPI, REST, GraphQL, CI/CD, iOS, Android, Swift, Objective-C, Kotlin, Java, Jest, Detox, Fastlane, Bitrise, AppCenter 🏢 Description: We are seeking an experienced Senior React Native Developer to join our team. In this role, you will be responsible for designing, developing, and maintaining mobile applications using React Native. The ideal candidate has a strong background in JavaScript/TypeScript, hands-on experience with React Native, and a solid understanding of mobile application development. Experience with native development for iOS and/or Android is a strong plus. Responsibilities Design and implement new features for mobile applications using React Native Maintain and enhance existing mobile applications Collaborate with project teams, designers, and QA engineers Optimize application performance and troubleshoot technical issues Participate in code reviews and share knowledge with the team Integrate applications with backend services (REST API, GraphQL) Apply best coding practices and ensure high code quality Requirements Minimum 4 years of experience in mobile application development, including at least 2 years with React Native Strong knowledge of JavaScript (ES6+) and TypeScript Experience with state management tools such as Redux, Context API, or similar Familiarity with publishing apps to the App Store and Google Play Ability to debug and optimize mobile applications Experience with CI/CD tools Good command of English, both written and spoken, for technical communication Nice to have Experience with native iOS development (Swift/Objective-C) and/or Android development (Kotlin/Java) Familiarity with tools like Fastlane, Bitrise, App Center Experience with mobile app testing (e.g., Jest, Detox) Understanding of mobile application security best practices We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: 4-month freelance contract for a Senior React Native Developer to build and maintain a cross-platform mobile application for iOS and Android based on an existing web platform. The role focuses on implementing new features, integrating APIs, optimizing performance, and contributing to architecture and code quality. The application supports monitoring and operational control of autonomous cleaning robots in large commercial facilities. 🗂️ Requirements: Availability from July 1st, 4+ years of commercial software development experience, Strong knowledge of React Native, Strong knowledge of TypeScript, Experience with REST API integrations, Understanding of App Store release processes, Understanding of Google Play release processes, Experience working in Agile teams, Proficiency with Git 📃 Skills: React, ReactNative, TypeScript, REST, Git, iOS, Android, Swift, Kotlin, CI/CD, Agile 🏢 Description: We are looking for an experienced Senior React Native Developer responsible for building and maintaining modern mobile applications for both iOS and Android platforms. The person in this role will collaborate closely with the project team on application architecture, implementation of new features, and performance optimization. This is a 6-month freelance contract (with a possibility of extension, though not guaranteed). Requirements: Availability starting July 1st 4+ years of commercial software development experience strong knowledge of React Native and TypeScript experience with REST API integrations understanding of App Store and Google Play release processes experience working in Agile teams good knowledge of Git Nice to have: experience with native iOS (Swift) or Android (Kotlin) development familiarity with CI/CD pipelines for mobile applications experienced in using AI tools in day-to-day workflow Responsibilities: Develop and maintain a cross-platform mobile application using React Native for iOS and Android. Implement new features based on the existing web application and business requirements. Collaborate with backend, web, QA, and product teams to ensure seamless integration and consistent user experience. Integrate REST APIs and real-time communication mechanisms. Optimize application performance, stability, and scalability. Participate in architecture discussions, code reviews, and technical decision-making. Troubleshoot, debug, and resolve application issues. Contribute to improving development standards, CI/CD processes, and overall code quality Project description: Development of a mobile application based on an existing web platform used for managing autonomous cleaning robots operating in shopping malls, airports, and other large commercial facilities. The application will support robot monitoring, task management, real-time status tracking, and operational control for end users.

🏢 Summary: The role involves developing a React Native mobile application for smart energy management, integrating IoT devices and analytics features. You will build high-performance UI components, enable secure communication with HVAC hardware, and implement data visualization modules while collaborating on Azure-based REST APIs. 🗂️ Requirements: 5+ years of commercial experience with React Native, Experience building mobile UI components and application architecture, Knowledge of secure communication between mobile apps and IoT/hardware systems, Experience with REST API integration and JSON data handling, Ability to optimize mobile app performance and troubleshoot bottlenecks, Fluency in English, Residing in Poland 📃 Skills: React, ReactNative, JavaScript, TypeScript, REST, JSON, Azure, IoT, HVAC 🏢 Description: We are looking for a React Native Developer to join a project for a global energy‑tech leader. You will help build a mobile application that supports smart energy management in homes and commercial spaces. The role connects mobile development, IoT, and modern analytics features Your tasks Develop high‑performance, reusable UI components for mobile apps using React Native Implement secure and low‑latency communication between mobile devices and HVAC hardware Build data visualization modules for energy usage, savings, and indoor air quality insights Collaborate with backend developers to define and consume RESTful APIs hosted on Azure Diagnose and resolve performance issues in complex, data‑heavy scenarios Requirements At least 5 years of experience working with React Native in commercial projects Strong skills in building mobile UI components and app architecture Good understanding of secure communication between mobile apps and hardware/IoT systems Ability to work with API integrations and JSON data handling Experience optimizing app performance and troubleshooting bottlenecks Fluency in English Residing in Poland required

🏢 Summary: Backend-focused engineering role supporting pricing and risk management systems through design, development, and modernization into a scalable microservices architecture. The position involves building and maintaining APIs, real-time messaging solutions, and cloud-based services within a hybrid environment. You will contribute to CI/CD, automation, and containerized deployments to ensure reliable and efficient software delivery. 🗂️ Requirements: Proficiency in C#, Experience with .NET Core or .NET 6+, Experience building REST APIs, Experience with gRPC services, Experience with WPF, Experience with React, Knowledge of messaging systems (ActiveMQ, Kafka, Redpanda), Experience with Docker and Kubernetes, Experience with CI/CD pipelines, Experience with Ansible, Ability to work with Linux command line, Bachelor’s degree in Information Technology 📃 Skills: C#, DotNet, WPF, React, Azure, REST, gRPC, Linux, ActiveMQ, Kafka, Redpanda, TeamCity, Ansible, Docker, Kubernetes, CICD 🏢 Description: Connecting clients to markets – and talent to opportunity With 5,400+ employees and over 80,000 institutional, commercial, and payments clients, we operate from more than 80 offices spread across six continents. As a Fortune 100, Nasdaq-listed provider, we connect clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors. Whether you want to forge a career connecting our retail clients to potential trading opportunities, or ingrain yourself in the world of institutional investing, StoneX Group is made up of four business segments that offer endless potential for progression and growth. Business Segment Overview: With boots on the ground authenticity at the heart of everything we do, our comprehensive array of commercial products and services enable you to work directly with our clients, across hedging, risk management, execution and clearing, OTC products, commodity finance and more. Responsibilities Position Purpose: This role supports the Pricing Team by designing, developing, and testing key projects that strengthen pricing and risk management. You will contribute to strategic initiatives to modernize our technology stack into a scalable, microservice-based architecture, actively offering ideas and solutions throughout the project lifecycle. Technology Ecosystem: Front-End: WPF, React Back-End: C#, .NET (Core/.NET 6+) Cloud: Azure Primary duties will include: Perform detailed requirement, design and code reviews to ensure thorough due diligence is applied. Understand individual business requirements in order to design, develop and test effective solutions. Understand and implement required development guidelines, design standards and best practices at all times. Understand in detail the business operational process both before and after the impact of any software changes. Take responsibility for analysis, design and development to ensure due diligence is applied consistently to all software changes. Ensure software releases support continuous build and automated deployment practices. Provide prompt and knowledgeable assistance to business continuity and platform operations whenever requested. Work to identify risks and enhance control across the business. Qualifications To land this role you will need : Proficient in C# and the modern .NET platform (Core/.NET 6+) for backend development. Experienced in building REST APIs and gRPC services. Comfortable with Linux command line for deployment and troubleshooting. Skilled in WPF for desktop applications and modern web frameworks such as React. Knowledge of messaging systems including ActiveMQ, Kafka, and Redpanda. Familiar with CI/CD pipelines using TeamCity. Hands-on experience with Ansible for automation and configuration management. Specialized in real-time streaming and distributed enterprise messaging. Expertise in Docker and Kubernetes for containerization and orchestration. Excellent communication and collaboration skills. Proficiency in English. What makes you stand out: Experience in finance Education / Certification Requirements: Bachelor’s degree in information technology. Working environment: Hybrid 4-days in office. #LI-Hybrid #LI-DK1