New offer - be the first one to apply!
August 8, 2026
Mobile Fullstack Team Leader
Senior • Remote
Warsaw, MZ, Poland
About the project
Join a digital financial services organization developing innovative, mobile-first solutions used by millions of customers. The work focuses on secure, scalable and user-friendly financial products that combine modern mobile technologies, cloud platforms and real-time transaction systems.
As part of a skilled engineering team, you will build next-generation financial applications for everyday money management, payments and digital banking. The environment emphasizes innovation, ownership, continuous learning and modern development practices, including AI-assisted software engineering.
Candidate profile
Experienced Fullstack Team Leader with 10+ years of hands-on software development experience and proven leadership in building high-scale, real-time FinTech systems. Able to lead cross-functional squads and take end-to-end ownership of complex financial products, from architecture design through production rollout for millions of users.
Responsibilities
- Lead multidisciplinary squads across Backend, Mobile, QA and Product.
- Take end-to-end ownership of core financial domains.
- Define and execute strategic plans and roadmaps.
- Drive engineering excellence and mentor developers.
- Lead development of real-time financial systems serving millions of users.
- Build scalable, resilient platforms for high-volume transactions.
- Deliver secure, compliant and high-performance FinTech solutions.
- Drive adoption of modern architectures and AI-driven development practices.
- Own full-lifecycle delivery from concept to production in mission-critical financial domains.
Requirements
FinTech domain knowledge
- Strong understanding of payment systems, transaction flows and financial services.
- Experience with real-time financial systems and high-volume transaction processing.
- Familiarity with regulatory and compliance requirements, including security, privacy and data integrity.
- Ability to translate complex financial and regulatory processes into intuitive product experiences.
Fullstack development
- Backend expertise with Java, Spring Boot and Spring Framework.
- Client-side architecture and modern frontend approaches.
- Deep understanding of Clean Architecture principles.
Mobile development
- Hands-on experience with iOS using Swift and SwiftUI, and Android using Kotlin and Jetpack Compose.
- Experience with Kotlin Multiplatform (KMP).
- Strong focus on performance, scalability and secure mobile architecture.
Cloud and DevOps
- Experience with AWS cloud environments.
- Containerization with Docker and orchestration using Kubernetes.
- CI/CD pipelines and production-grade deployment practices.
AI-driven development
- Experience with Generative AI and developer productivity tools.
- Application of Spec-Driven Development (SDD) methodologies.
- Integration of AI into development workflows and product capabilities.
- Exposure to AI-on-Edge optimization challenges in mobile environments.
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Krakow, Poland
170 - 190 PLN/hr
🏢 Summary: FullStack Developer role focused on building and enhancing a digital onboarding platform for Global Banking and Markets. The position involves developing scalable Java backend services and React-based user interfaces within a microservices architecture. The project emphasizes automation, security, performance, and DevOps-driven delivery in a hybrid work model. 🗂️ Requirements: Strong knowledge of Java 8+ / 18+, Proficiency in React JS, Experience with microservices architecture, Ability to write and maintain REST APIs, Experience with CI/CD tools, Experience debugging and extending existing code, Knowledge of database schema design, Understanding of DevOps practices and production support, Focus on application and service security 📃 Skills: Java, React, REST, Microservices, CI/CD, PostgreSQL, DevOps, SQL 🏢 Description: Location : Cracow Mode : hybrid (6x per month) Contract : B2B Rate : 170-190 PLN/h We are seeking a FullStack Developer to join our team working on our client’s onboarding solution. This role focuses on building the next generation of digital platforms for Global Banking and Markets, enhancing the onboarding experience for Corporates and Institutions. The ideal candidate will utilize their expertise to simplify the onboarding process, improving client experience and retention. This project embraces the latest technologies and encourages innovative thinking for automating tasks, learning new solutions, and maintaining a customer-first approach. Main Responsibilities: Develop and maintain high-quality, scalable Java applications. Implement and optimize React components for user-friendly interfaces. Debug existing code and extend functionality as needed. Write REST APIs and understand micro service architectures. Create and execute tests to validate functionalities and endpoints. Utilize CI-CD tools for seamless deployment and operations. Prioritize security in all service implementations. Contribute to performance and stability improvements of the platform. Engage in production support on a rotational basis within a DevOps POD. Collaborate in a fast-paced, innovative environment. Key Requirements: Strong knowledge of Java 8+ / 18+ Proficient in React JS Experience debugging and extending existing code Understanding of micro service architecture Capability to write REST APIs Experience with CI-CD tools Focus on security for functionalities and services Self-motivated with rapid learning capability Experience in a collaborative, fast-paced environment Problem-solving and analytical skills Good knowledge of database schema design, PostgreSQL is a plus Aware of DevOps practices and production support