Tech Lead React Native

🏢 Summary: Hands-on Technical Lead role focused on architecting, scaling, and optimizing React Native mobile applications supporting real-time logistics workflows. The position combines technical leadership with active development, ensuring performance, reliability, and seamless integration with backend systems in production environments. It involves setting engineering standards, improving CI/CD processes, and mentoring mobile engineers. 🗂️ Requirements: 8+ years professional software engineering experience, Significant hands-on mobile development experience, 2+ years in technical leadership or team lead role, Strong experience building and scaling React Native applications in production, Solid understanding of iOS and Android platforms, Proficiency in React Native and TypeScript, Experience designing and consuming RESTful APIs, Experience with real-time service integrations, Ability to ensure application performance, quality, and stability, Polish B2+ and English B2+ 📃 Skills: React, ReactNative, TypeScript, iOS, Android, REST, APIs, CI/CD, Git, Mobile, JavaScript 🏢 Description: Overview Technical Lead, Mobile Engineering is a hands-on technical leadership role responsible for shaping and scaling OneRail’s mobile application ecosystem that powers real-time last mile orchestration, driver workflows, and enterprise delivery visibility. This role exists to ensure our mobile solutions are reliable, performant, and resilient in real-world logistics environments where connectivity may fluctuate and operational precision is critical. Responsibilities Own and evolve the architecture of OneRail’s mobile applications built in React Native with native iOS and Android integrations. Lead the design and implementation of scalable, high-performance mobile solutions supporting real-time logistics workflows. Partner closely with Product and Design teams to translate business requirements into intuitive, reliable mobile experiences for drivers and operational users. Ensure application performance, responsiveness, quality, and stability in production environments. Establish and enforce engineering standards for code quality, testing, observability, security, and CI/CD pipelines. Conduct and contribute to regular code reviews to maintain high engineering standards. Build and maintain reusable software components, shared libraries, and mobile infrastructure that integrate with backend. Analyze, benchmark, and optimize mobile applications for performance, scalability, and efficiency. Balance feature development with technical debt reduction and long-term platform sustainability. Improve developer experience through tooling enhancements, workflow automation, and release process optimization. Mentor and develop mobile engineers, supporting skill growth and career progression. Support hiring, onboarding, and retention of top mobile engineering talent. Qualifications 8+ years of professional software engineering experience, including significant hands-on mobile development. 2+ years of experience in technical leadership or team lead capacity. Strong experience building and scaling React Native applications in production environments. Solid understanding of native mobile platforms (iOS and Android) and their integration with cross-platform frameworks. Proficiency in React Native, TypeScript Experience designing and consuming RESTful APIs and real-time service integrations. Strong problem-solving skills with the ability to balance business priorities and technical excellence. Excellent communication and collaboration skills (Polish B2+ & English B2+) Office location: Kraków, Poland Work Style: hybrid (2-3 days from the office / week). Salary level: 28 000 – 32 000 PLN/ month

🏢 Summary: Hands-on Technical Lead role focused on architecting and scaling React Native mobile applications supporting real-time logistics workflows. The position combines technical leadership with active mobile development, ensuring high performance, reliability, and seamless integration with backend systems. It involves setting engineering standards, optimizing CI/CD processes, and mentoring mobile engineers in a production environment. 🗂️ Requirements: 8+ years of professional software engineering experience, 2+ years of technical leadership experience, Strong experience with React Native in production, Experience with native iOS and Android integrations, Proficiency in TypeScript, Experience designing and consuming RESTful APIs, Experience with real-time service integrations, Ability to ensure code quality, testing, and CI/CD standards, Polish B2+, English B2+ 📃 Skills: React, ReactNative, TypeScript, iOS, Android, REST, CI/CD, Git, APIs 🏢 Description: Overview Technical Lead, Mobile Engineering is a hands-on technical leadership role responsible for shaping and scaling OneRail’s mobile application ecosystem that powers real-time last mile orchestration, driver workflows, and enterprise delivery visibility. This role exists to ensure our mobile solutions are reliable, performant, and resilient in real-world logistics environments where connectivity may fluctuate and operational precision is critical. Responsibilities Own and evolve the architecture of OneRail’s mobile applications built in React Native with native iOS and Android integrations. Lead the design and implementation of scalable, high-performance mobile solutions supporting real-time logistics workflows. Partner closely with Product and Design teams to translate business requirements into intuitive, reliable mobile experiences for drivers and operational users. Ensure application performance, responsiveness, quality, and stability in production environments. Establish and enforce engineering standards for code quality, testing, observability, security, and CI/CD pipelines. Conduct and contribute to regular code reviews to maintain high engineering standards. Build and maintain reusable software components, shared libraries, and mobile infrastructure that integrate with backend. Analyze, benchmark, and optimize mobile applications for performance, scalability, and efficiency. Balance feature development with technical debt reduction and long-term platform sustainability. Improve developer experience through tooling enhancements, workflow automation, and release process optimization. Mentor and develop mobile engineers, supporting skill growth and career progression. Support hiring, onboarding, and retention of top mobile engineering talent. Qualifications 8+ years of professional software engineering experience, including significant hands-on mobile development. 2+ years of experience in technical leadership or team lead capacity. Strong experience building and scaling React Native applications in production environments. Solid understanding of native mobile platforms (iOS and Android) and their integration with cross-platform frameworks. Proficiency in React Native, TypeScript Experience designing and consuming RESTful APIs and real-time service integrations. Strong problem-solving skills with the ability to balance business priorities and technical excellence. Excellent communication and collaboration skills (Polish B2+ & English B2+) Office location: Kraków, Poland Work Style: hybrid (2-3 days from the office / week). Salary level: 28 000 – 32 000 PLN/ month

🏢 Summary: Hands-on Technical Lead role responsible for architecting and scaling React Native mobile applications that support real-time logistics workflows and enterprise delivery visibility. The position combines technical leadership with active mobile development, focusing on performance, reliability, and resilient solutions in production environments. It includes ownership of mobile architecture, engineering standards, and CI/CD practices. 🗂️ Requirements: 8+ years of professional software engineering experience, 2+ years of technical leadership experience, Strong experience with React Native in production, Experience with native iOS and Android integration, Proficiency in TypeScript, Experience designing and consuming RESTful APIs, Experience with real-time service integrations, Ability to establish and enforce CI/CD practices, English B2+, Polish B2+ 📃 Skills: ReactNative, TypeScript, iOS, Android, REST, CI/CD, JavaScript, APIs 🏢 Description: Overview Technical Lead, Mobile Engineering is a hands-on technical leadership role responsible for shaping and scaling OneRail’s mobile application ecosystem that powers real-time last mile orchestration, driver workflows, and enterprise delivery visibility. This role exists to ensure our mobile solutions are reliable, performant, and resilient in real-world logistics environments where connectivity may fluctuate and operational precision is critical. Responsibilities Own and evolve the architecture of OneRail’s mobile applications built in React Native with native iOS and Android integrations. Lead the design and implementation of scalable, high-performance mobile solutions supporting real-time logistics workflows. Partner closely with Product and Design teams to translate business requirements into intuitive, reliable mobile experiences for drivers and operational users. Ensure application performance, responsiveness, quality, and stability in production environments. Establish and enforce engineering standards for code quality, testing, observability, security, and CI/CD pipelines. Conduct and contribute to regular code reviews to maintain high engineering standards. Build and maintain reusable software components, shared libraries, and mobile infrastructure that integrate with backend. Analyze, benchmark, and optimize mobile applications for performance, scalability, and efficiency. Balance feature development with technical debt reduction and long-term platform sustainability. Improve developer experience through tooling enhancements, workflow automation, and release process optimization. Mentor and develop mobile engineers, supporting skill growth and career progression. Support hiring, onboarding, and retention of top mobile engineering talent. Qualifications 8+ years of professional software engineering experience, including significant hands-on mobile development. 2+ years of experience in technical leadership or team lead capacity. Strong experience building and scaling React Native applications in production environments. Solid understanding of native mobile platforms (iOS and Android) and their integration with cross-platform frameworks. Proficiency in React Native, TypeScript Experience designing and consuming RESTful APIs and real-time service integrations. Strong problem-solving skills with the ability to balance business priorities and technical excellence. Excellent communication and collaboration skills (Polish B2+ & English B2+) Office location: Kraków, Poland Work Style: hybrid (2-3 days from the office / week). Salary level: 28 000 – 32 000 PLN/ month

🏢 Summary: The role involves building and scaling a high-performance React Native mobile application integrated with an existing web customer portal. The developer will own the mobile architecture, ensuring scalable navigation, state management, networking, and seamless backend API integration for iOS and Android. The position includes end-to-end feature delivery, performance optimization, and establishing mobile development best practices. 🗂️ Requirements: 5–8+ years of Frontend or Mobile development experience, 3+ years of production experience with React Native on iOS and Android, Strong proficiency in JavaScript, Strong proficiency in TypeScript, Experience with native module integration, Experience with deep-level debugging, Knowledge of mobile performance profiling, Ability to build accessible and responsive mobile UIs, Experience with unit, integration, and e2e testing, Experience with CI/CD workflows, Experience with React Navigation, Experience with state management using React Query, SWR, Redux, or Context 📃 Skills: ReactNative, JavaScript, TypeScript, iOS, Android, ReactNavigation, ReactQuery, SWR, Redux, Context, Jest, RTL, CI/CD, APIs 🏢 Description: The objective is to build and scale a React Native mobile application that serves as a high-performance companion to an existing web customer portal. You will own the core mobile experience, architecting scalable solutions for navigation, state management, and networking while ensuring seamless integration with existing backend APIs. This role is ideal for a developer who can deliver end-to-end features and establish mobile best practices within a collaborative team environment. Details Location: Remote, with a preference for candidates based in Wrocław (for quarterly on-site client meetings). Primary Project Language: Polish. Target Platforms: iOS and Android. Responsibilities End-to-End Development: Building mobile features that maintain parity and cohesion with the web customer portal. Architecture: Designing scalable code structures, focusing on efficient navigation, state management, and robust networking. Performance & Reliability: Ensuring high stability, fast UI responsiveness, and implementing offline-tolerant UX where necessary. Technical Leadership: Establishing mobile development standards, mentoring other engineers, and improving release cadence. Collaboration: Working closely with product, design, and backend teams to ensure a unified user experience. Requirements General Seniority: 5–8+ years in Frontend or Mobile development. React Native Mastery: 3+ years of experience shipping and maintaining production React Native apps (iOS + Android). Core Skills: Strong proficiency in JavaScript/TypeScript . Native Modules: Experience with native module integration and deep-level debugging. Optimization: Solid knowledge of mobile performance profiling and building accessible, responsive UIs. Testing & DevOps: Comfort with unit/integration/e2e testing (Jest, RTL) and CI/CD workflows. Navigation: React Navigation. Data & State: React Query / SWR or Redux / Context. Nice to Have Familiarity with both Expo and bare React Native workflows. Experience with push notifications, deep linking, and mobile analytics. Prior experience with B2B, customer self-service, or account management applications.

🏢 Summary: Senior React Native Developer role focused on building and evolving a large-scale, multi-module mobile platform used by millions of users across Europe and North America. The position involves driving architectural decisions, developing complex mobile applications in React Native and TypeScript, and mentoring engineers while ensuring high performance and scalability. You will collaborate cross-functionally and contribute to CI/CD, native integrations, and continuous technical improvements. 🗂️ Requirements: 5+ years commercial software development experience, 4+ years experience with React Native, Experience building and maintaining large-scale mobile applications, Strong knowledge of TypeScript and modern JavaScript, Experience with React Hooks, Understanding of modular and multi-module architecture, Experience with MobX, Experience with React Query (TanStack Query), Knowledge of native mobile development concepts for iOS and Android, Experience integrating REST APIs, Experience with GraphQL, Experience with form management solutions, English proficiency at B2 level or higher, Polish proficiency at B2 level or higher, Residence in Poland 📃 Skills: React, ReactNative, TypeScript, JavaScript, MobX, ReactQuery, TanStackQuery, iOS, Android, REST, GraphQL, CI/CD, Firebase 🏢 Description: Join one of Europe's largest mobile platforms, delivering digital services used by millions of users across multiple countries in Europe and North America. Built on a multi-module architecture, the platform enables rapid product development, high code reusability, and continuous expansion into new business areas. As a Senior React Native Developer, you will play a key role in shaping the architecture of a big mobile ecosystem, driving technical decisions, mentoring other engineers, and delivering high-quality solutions at scale. Your tasks Design, develop, and maintain complex mobile applications using React Native and TypeScript Drive architectural decisions and contribute to the evolution of our multi-module platform Lead technical discussions and participate in solution design Review code, mentor team members, and promote engineering best practices Collaborate closely with Product Owners, UX Designers, Backend Engineers, QA Engineers, and Architects Improve application performance, reliability, scalability, and maintainability Contribute to CI/CD processes and development tooling Support the integration of native mobile capabilities and third-party services Identify technical debt and proactively drive improvements across the codebase Requirements At least 5 years of commercial software development experience, including at least 4 years with React Native Proven track record of building and maintaining large-scale mobile applications Strong expertise in TypeScript, modern JavaScript, and React Hooks Solid understanding of modular and multi-module application architecture Hands-on experience with MobX and React Query (TanStack Query) Knowledge of native mobile development concepts and creating native modules for iOS and Android Practical experience with REST APIs, GraphQL, and form management solutions English and Polish proficiency at the B2 level or higher Residing in Poland required Nice-to-have requirements Payment integrations and mobile wallet solutions Geolocation and location-based services Firebase services and analytics Mobile security best practices Observability and monitoring tools Background in large-scale international products Agile delivery experience (Scrum/Kanban) What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Senior Mobile Developer (React Native) role focused on building and optimizing high-performance cross-platform mobile applications for iOS and Android within a delivery orchestration platform. The position involves developing advanced features, integrating APIs, implementing native modules, and improving CI/CD processes. You will collaborate with cross-functional teams to deliver scalable, secure, and production-ready mobile solutions. 🗂️ Requirements: 8+ years of mobile app development experience, Strong commercial experience with React Native, Experience with React ecosystem, Experience with state management libraries (Redux, MobX, Zustand or similar), Experience with React Navigation and deep linking, Experience integrating REST or GraphQL APIs, Experience handling offline data storage, Understanding of app lifecycle and background tasks, Experience with push notifications, Experience with native modules and platform-specific integrations, Knowledge of mobile security best practices, Experience with data persistence, Understanding of cloud services (AWS, GCP or Azure), Experience with CI/CD practices, Experience with Agile methodologies, Experience publishing apps to App Store and Google Play 📃 Skills: React, ReactNative, Redux, MobX, Zustand, ReactNavigation, REST, GraphQL, AsyncStorage, SQLite, Realm, iOS, Android, AWS, GCP, Azure, CI/CD, Agile 🏢 Description: OneRail is a technology company innovating solutions for multi-modal delivery. We have built and continue to develop a delivery orchestration platform that connects shippers to an extensive courier ecosystem to automate, optimize, and control the entire delivery supply chain, from the demand signal to the proof of delivery. Our OmniPoint SaaS platform uses proprietary algorithms and artificial intelligence to power efficient same-day delivery programs for major companies like Lowe’s, Pepsi, American Tire Distributors, and Advance Auto Parts. As Senior Mobile Developer (React Native) you join a team of talented engineers and developers working together to transform final mile logistics and supply chain operations. In this role, you will work closely with product owners, designers, and other developers to build and maintain high-performance applications that run on iOS and Android platforms. If you have a passion for single code base development, a strong background in React Native, and enjoy working in a team-oriented environment, we encourage you to apply. Key Responsibilities: Design and develop advanced mobile applications using React Native. Integrate APIs. Implement modern UI/UX designs with pixel-perfect precision across iOS and Android. Write clean, modular, well-tested code following architecture patterns and best practices typical for mobile apps development. Identify and resolve performance bottlenecks, memory leaks, and UI glitches. Implement native modules and platform-specific integrations (camera, geolocation, push notifications, local storage). Participate in code reviews, testing, and debugging to ensure high code quality and reliability. Assist in automating deployment processes and improving CI/CD pipelines. Stay updated with industry trends and emerging technologies to continuously improve our platform. Requirements: 8+ years of experience in mobile apps development, with a particular focus on efficiency optimization and code reuse. Strong commercial experience with React Native and the React ecosystem Experience with state management (Redux, MobX, Zustand, or similar). Familiarity with React Navigation and deep linking. Experience integrating APIs (REST, GraphQL) and handling offline data (e.g., AsyncStorage, SQLite, Realm). Understanding of app lifecycle management, background tasks, and push notifications. Experience with platform-specific integrations (e.g., camera, geolocation, local storage). Understanding of mobile security best practices. Familiarity with mobile app design principles and UI/UX best practices. Familiarity with publishing to App Store and Google Play. Understanding of cloud services (AWS, GCP, or Azure). Experience with data persistence Experience with Agile methodologies and CI/CD practices. Strong problem-solving skills and ability to work in a fast-paced environment. Excellent communication and collaboration skills. Advanced proficiency in English, both written and spoken (B2+). Not sure if you have enough experience to meet the challenge, but still willing to learn and join our team? Send us your application and we will be happy to talk about the possibilities. Think big! Why Join OneRail Poland? Innovation at its Core: Work on industry-leading technology that is shaping the future of logistics. Career Growth: Opportunities for professional development and career advancement. Collaborative Culture: Join a team of talented engineers and industry experts. Exciting Challenges: Solve complex problems and contribute to impactful projects. Flexibility: We offer a flexible hybrid work style and flexible employment types to suit your needs, ensuring a work-life balance that works for you. Competitive Compensation: Attractive salary and benefits package. Office location: Kraków, Poland Work Style: hybrid (2-3 days from the office / week preferred), We are open to a more flexible arrangement for candidates located outside the Krakow area. Salary levels: 20 000 – 28 000 PLN/month Take the next step in your career and become a part of OneRail’s exciting journey!

🏢 Summary: B2B contract role to migrate multiple existing mobile applications to a unified React Native solution for a financial market project. The project spans approximately two years and involves working in an interdisciplinary team to rebuild apps currently developed in different technologies. The focus is on cross-platform mobile development using React Native with cloud and backend integrations. 🗂️ Requirements: 5+ years of mobile development experience, Experience developing both iOS and Android applications, Strong JavaScript and TypeScript knowledge, Strong React Native experience including Expo, Experience with Firebase services (Push, Crashlytics), Experience integrating REST APIs, Experience working with AWS cloud, English proficiency at B2 level or higher 📃 Skills: ReactNative, Expo, TypeScript, JavaScript, Firebase, Crashlytics, Push, AWS, REST, iOS, Android 🏢 Description: We’re looking for specialists open to cooperate on B2B basis, for our customer – Avanade Poland. Avanade website ; Privacy policy This role is available starting from July/August , for both specialists open to work remotely (within Poland) or in hybrid mode (offices in Wroclaw and Krakow). Position: The project is carried out for financial market and is planned for ~2 years. Main goal is to rewrite existing mobile apps - currently there is a few apps, written using different technologies (Flutter, MAUI), and the main challenge in the project will be to bring all of them to React Native. Project team size is estimated to be 44 specialists. You will join interdisciplinary team consisting of up to 8 Engineers. Tech stack: React Native, React Native Expo, TypeScript/JavaScript, Firebase services - Push, Crashlytics, AWS, REST API, Git, Google Play, App Store Connect, Scrum Required skills: For this role, you will need: 5y+ of experience with mobile development , including both iOS and Android apps Strong JavaScript/TypeScript and React Native skills (including Expo) Good working knowledge of Firebase (Push, Crashlytics) REST API Experience with AWS cloud English skills at B2 level (we communicate in English on a daily basis) Experience leading a small team of mobile devs will be a plus If you want to ask any questions before applying, feel free to reach out via LinkedIn !

🏢 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: Hands-on Technical Lead (.NET) role focused on designing and delivering scalable, high-performance software solutions for logistics platforms. The position combines architectural decision-making, microservices and cloud-based system design with active coding and team leadership. You will drive technical direction, ensure best engineering practices, and oversee Azure-based cloud environments and CI/CD processes. 🗂️ Requirements: 8+ years of software engineering experience, Minimum 2 years in technical leadership role, Strong experience with .NET and C#, Experience designing and developing scalable RESTful APIs, Knowledge of microservices architecture and design patterns, Experience with message queues, Experience with relational or NoSQL databases, Experience with Azure and GCP cloud services, Experience with Docker and Kubernetes, Experience with CI/CD practices, Experience with Agile methodologies, Experience managing software releases and performance monitoring, Advanced English proficiency (B2+) 📃 Skills: .NET, C#, Node.js, REST, Microservices, RabbitMQ, Kafka, MySQL, MongoDB, CosmosDB, Azure, GCP, Docker, Kubernetes, CI/CD, Agile 🏢 Description: As Technical Lead (.NET) you join a team of talented engineers and developers working together to transform final mile logistics and supply chain operations.  Your role will be a hands-on leadership position where you guide engineering teams to deliver scalable, high-quality software solutions. This is the perfect role for experienced engineers who thrive in technical decision-making, architecture, and mentorship—while staying engaged in hands-on coding. Key Responsibilities: Define the technical direction, making pivotal design decisions to ensure our architecture is scalable, maintainable, and high performing. Stay hands-on with coding, leading by example and ensuring adherence to best practices in security, performance, development, deployment and observability. Implement scalable microservices, API gateways, and event-driven architectures, ensuring high availability, disaster recovery and fault tolerance strategies are in place. Champion high-quality code testing, automation testing, and continuous integration/continuous deployment (CI/CD). Oversee Azure-based cloud architecture, optimizing performance, security, and cost efficiency. Directly supervise, mentor, and develop a team of 5-7 engineers, providing career guidance and fostering a culture of engineering excellence full of collaboration, accountability and professional growth. Actively recruit and interview top talent to strengthen the engineering team. Collaborate with Product Managers to align roadmap priorities, streamline development workflows, and enhance team processes for improved efficiency and operational excellence. Optimize development workflows and SDLC processes to improve team velocity, efficiency and maintain low cycle times. Establish engineering KPIs and leverage data-driven insights to enhance performance. Stay updated with industry trends and emerging technologies to continuously improve our platform. Requirements: 8+ years in software engineering (ideally .NET C#), with at least 2 years in a technical leadership role. Experience in other tech stacks like Node.js as a plus. Demonstrated expertise in designing and developing scalable APIs, with knowledge of RESTful principles and best practices. Knowledge of microservices architecture and related design patterns / best practices. Experience with message queues (e.g., RabbitMQ, Kafka) and event-driven architecture / patterns. Experience with databases such as MySQL, MongoDB, CosmosDB or similar. Experience utilizing cloud services (Azure and GCP) and containerization (Docker, Kubernetes). Experience with Agile methodologies and CI/CD practices. Experience in managing software releases, performance monitoring, and reliability improvements. Strong problem-solving skills and ability to work in a fast-paced environment. Ability to explain complex technical concepts to engineers, executives, and cross-functional teams. Advanced proficiency in English, both written and spoken (B2+). Office location: Kraków, Poland Work Style: hybrid (2-3 days from the office / week preferred) Salary levels: 28 000 – 32 000 PLN/ month Take the next step in your career and become a part of OneRail’s exciting journey!

🏢 Summary: Senior React Native Developer role focused on delivering end-to-end mobile applications using React Native and Expo, with responsibility for architecture, API integration, and technical leadership. The position involves driving technical decisions, ensuring code quality, and collaborating with clients and teams to build scalable enterprise mobile solutions. 🗂️ Requirements: Advanced English proficiency, Proven experience developing mobile applications with React Native, Practical experience with Expo, Experience integrating REST or GraphQL APIs, Experience in technical leadership or mentoring, Experience with debugging and monitoring tools, Understanding of scalability and code quality principles, Ability to translate business requirements into technical solutions 📃 Skills: React, ReactNative, Expo, REST, GraphQL, CI/CD, Monitoring, Logging, APIs, Mobile 🏢 Description: 🌍 Hello World! We are The Codest -  International Tech Software Company with tech hubs in Poland delivering global IT solutions and projects. Our core values lie in “Customers and People First” approach that prioritises the needs of our customers and a collaborative environment for our employees, enabling us to deliver exceptional products and services. Our expertise centers on web development, cloud engineering, DevOps and quality. After many years of developing our own product - Yieldbird, which was honored as a laureate of the prestigious Top25 Deloitte awards, we arrived at our mission: to help tech companies build impactful product and scale their IT teams through boosting IT delivery performance. Through our extensive experience with product development challenges, we have become experts in building digital products and scaling IT teams. But our journey does not end here - we want to continue our growth. If you’re goal-driven and looking for new opportunities, join our team! What awaits you is an enriching and collaborative environment that fosters your growth at every step. 💡 Project Description: We’re seeking a seasoned Senior React Native Developer with strong experience in React Native and Expo, who is ready to step into a technical leadership role on mobile projects. In this position, you’ll be responsible for delivering end-to-end mobile applications, shaping architectural decisions, integrating with existing APIs, and supporting the team in building high-quality solutions. 📈 Your Responsibilities : Build and mantain mobile applications using React Native and Expo Integrate mobile frontends with existing APIs and backend services Partner with internal teams and clients to ensure solutions align with business objectives Drive technical planning, analysis, and execution across development work Support the team through code reviews and knowledge sharing, raising engineering quality Collaborate on delivering scalable, maintainable, and observable enterprise solutions Serve as the primary contact for technical topics within the project 🔑 Key Requirements: Advanced English in speaking and writing (you will be working in an international team) Solid track record of developing mobile apps with React Native Practical experience working with Expo Strong background in integrating with REST and/or GraphQL APIs Experience guiding others or contributing in a mentoring / technical leadership capacity Familiarity with debugging and monitoring tools Good understanding of scalability, maintainability, and overall code quality Ability to work with clients and translate business requirements into technical solutions ➕ Nice to have: Background in building or contributing to enterprise-scale applications Familiarity with setting up or working with mobile CI/CD processes Experience using observability solutions, including logging and monitoring tools 📜 Our Promise (what you can expect from us): 17-22k PLN monthly on B2B contract 100% remote work (but we have offices in Krakow and Warsaw and we’re happy to meet there from time to time 😉) 300 PLN to use on our benefits platform, Worksmile - gift cards, medical services, sports, etc. Our B2B contract contains provisions that allow you to obtain IP BOX support Integration events, education opportunities and much more… A unique opportunity to take your career to the next level - we’re looking for people who want to create an impact. You have ideas, we want to hear them! 📌 Recruitment process: 30 minute screening call online with our recruiter 1h technical call with our developer 30 minute conversation with the team leader on client side 30 minute English language check Final 1h technical call Offer Questions, insights? Feel free to reach out to our recruiting team: ewa.szczodrak@thecodest.co In the meantime, feel free to visit our website where you can find key facts about us.