React / React Native Engineer

🏢 Summary: QA Engineer role focused on testing and safeguarding fintech platforms covering APIs, web, and mobile applications in a regulated financial environment. The position combines manual and automated testing, building regression suites, and collaborating with stakeholders to ensure high-quality trading and custody workflows. The role also explores AI-assisted testing to improve coverage and efficiency. 🗂️ Requirements: Experience in manual testing of APIs, web applications, and mobile apps, Experience in automated testing and building regression test suites, Ability to design test strategies based on complex business requirements, Understanding of software testing processes in regulated environments, Strong collaboration with developers and business stakeholders, Ability to work in hybrid model (Warsaw office twice a week) 📃 Skills: API, Web, Android, iOS, Selenium, Cypress, Appium, Playwright, Postman, REST, Ginkgo, Gomega, Cucumber, BDD, Automation, Regression, AI 🏢 Description: About Tradevest Tradevest is a BaFin-licensed digital financial infrastructure provider headquartered in Munich, Germany. We deliver banking-as-a-service solutions that enable trading, custody, and management of traditional securities, cryptocurrencies, and tokenized assets — all through a single integrated platform. Our clients include banks, wealth managers, neobrokers, and fintechs across Europe. Our IT development hub is based in Warsaw, where our engineering team meets in the office twice a week. We maintain a hybrid work model because we genuinely believe that in-person collaboration helps us build better products and stronger teams. We're growing rapidly, building serious financial platforms while keeping a relaxed, professional atmosphere where engineers have real ownership over what they build. ## What you'll do - Test multiple platforms across a wide range of technologies — from manual API testing and web app validation to mobile app testing on Android and iOS - Build and maintain automated regression test suites to safeguard critical financial workflows - Explore and implement AI-assisted testing approaches to increase coverage and efficiency - Collaborate closely with business stakeholders on user story refinement and acceptance criteria - Support documentation management and serve as a key point of contact for clients - Bring a detail-oriented, analytical mindset to a highly regulated environment where precision directly impacts trust ## What we're looking for - Experience in manual and automated testing across APIs, web applications, and mobile apps - A meticulous, detail-oriented approach — in fintech, the details matter - Ability to quickly understand complex business domains and translate requirements into thorough test strategies - Strong communication skills — you'll work with developers, business analysts, and external clients - A proactive mindset — our QA engineers are not just testers, they're active participants in shaping the product - Eagerness to learn and adapt — you'll ramp up quickly on trading markets, financial regulations, and platform-specific knowledge ## Nice to have - Prior experience in fintech, banking, or other regulated industries - Understanding of EU trading markets and associated regulations (MiFID II, KYC/AML) - Experience with test automation frameworks (Selenium, Cypress, Appium, Playwright, or similar) - Familiarity with API testing tools (Postman, REST Assured, or similar) - Experience with BDD frameworks (Ginkgo/Gomega, Cucumber, or similar) ## What we offer - Hybrid work model — 2 days/week in our Warsaw office, rest remote - 20 days PTO on B2B - A role that goes beyond testing — real influence on product quality, client relationships, and business processes - Exposure to diverse platforms and technologies in a fast-moving fintech environment - A team that values growth — we invest in building competences and support continuous learning - Relaxed yet professional culture in a rapidly growing company - Flex-time arrangements

🏢 Summary: Backend engineering role focused on building and maintaining regulated financial services platforms, primarily in Python with exposure to Go and Rust. The position involves designing cloud infrastructure, integrating external financial systems, and delivering production-ready solutions in a highly regulated fintech environment. Hybrid work model with strong ownership over technical solutions. 🗂️ Requirements: Solid experience with Python, Willingness to work with Go and/or Rust, Experience with cloud platforms, Experience with infrastructure-as-code using Terraform, Understanding of distributed systems concepts, Ability to work autonomously in a team environment, Ability to operate in a regulated environment with high quality standards 📃 Skills: Python, Go, Rust, Terraform, AWS, Azure, DistributedSystems, EventDrivenArchitecture, MessageQueues, CI/CD, Containers 🏢 Description: Tradevest is a BaFin-licensed digital financial infrastructure provider headquartered in Munich, Germany. We deliver banking-as-a-service solutions that enable trading, custody, and management of traditional securities, cryptocurrencies, and tokenized assets — all through a single integrated platform. Our clients include banks, wealth managers, neobrokers, and fintechs across Europe. Our IT development hub is based in Warsaw, where our engineering team meets in the office twice a week. We maintain a hybrid work model because we genuinely believe that in-person collaboration helps us build better products and stronger teams. We're growing rapidly, building serious financial platforms while keeping a relaxed, professional atmosphere where engineers have real ownership over what they build. What you'll do - Develop and maintain backend services powering regulated financial products - Work across multiple projects — from building new and maintaining existing Python-based solutions to building new services in Go or Rust - Design and implement cloud infrastructure using Terraform (AWS, Azure, On-Prem) - Build integrations with external financial services, tackling real-world challenges around asynchronous processing and data synchronization - Take ownership of delivering high-quality, production-ready systems in a highly regulated fintech environment - Leverage AI-assisted development tools thoughtfully — we embrace them but never at the cost of security or quality What we're looking for - Solid experience with Python - Openness and willingness to work with Go and/or Rust — you don't need to be an expert, but curiosity matters - Experience with cloud platforms and infrastructure-as-code (Terraform) - Understanding of distributed systems concepts — event-driven architectures, message queues, eventual consistency - Ability to work autonomously while collaborating with a team - Comfort operating in a regulated environment where quality and reliability are non-negotiable Nice to have - Prior experience in fintech, banking, or other regulated industries - Familiarity with Go or Rust in production environments - Knowledge of CI/CD pipelines and containerized deployments What we offer - Hybrid work model — 2 days/week in our Warsaw office, rest remote - 20 days PTO on B2B - Real impact on financial products used by institutional clients across Europe - Exposure to a modern, polyglot tech stack and cloud-native architecture - A team that values engineering growth — we invest in building competences, not just shipping features - Relaxed yet professional culture in a rapidly growing company - Flex-time arrangements

🏢 Summary: Full-Stack Developer role focused on building and evolving a regulated fintech platform using .NET and modern multi-stack technologies. The position involves full-stack development with React, cloud infrastructure management via Terraform, and integration with external financial services in distributed environments. The role requires delivering secure, production-grade systems within a cloud-native architecture. 🗂️ Requirements: Strong experience with .NET, Experience with React, Experience with cloud platforms, Experience with Terraform, Understanding of distributed systems, Understanding of event-driven architectures, Experience with system integrations, Ability to work across multiple programming languages (Go, Python, Rust, Java) 📃 Skills: .NET, React, Go, Python, Rust, Java, Terraform, AWS, Azure, GCP, PostgreSQL, DynamoDB, CI/CD, Docker 🏢 Description: Full-Stack Developer (.NET / Multi-stack) About Tradevest Tradevest is a BaFin-licensed digital financial infrastructure provider headquartered in Munich, Germany. We deliver banking-as-a-service solutions that enable trading, custody, and management of traditional securities, cryptocurrencies, and tokenized assets — all through a single integrated platform. Our clients include banks, wealth managers, neobrokers, and fintechs across Europe. Our IT development hub is based in Warsaw, where our engineering team meets in the office twice a week. We maintain a hybrid work model because we genuinely believe that in-person collaboration helps us build better products and stronger teams. We're growing rapidly, building serious financial platforms while keeping a relaxed, professional atmosphere where engineers have real ownership over what they build. What you'll do - Develop and evolve an existing fintech platform built on .NET and contribute to new initiatives in other modern stacks - Work across the full stack — from backend services to client-facing interfaces in React - Manage cloud infrastructure using Terraform on (AWS,Azure,GCP) - Integrate with a variety of external financial services, solving complex challenges around asynchronous processing and data synchronization - Deliver production-ready, high-quality systems that meet the strict standards of a regulated fintech environment - Use AI-assisted development tools pragmatically — we're structured in our adoption but always prioritize security and quality What we're looking for - Strong experience with .NET - Openness to working with other languages and stacks — Go, Python, Rust, or Java — depending on project needs - Experience with cloud platforms and infrastructure-as-code (Terraform) - A polyglot mindset — you're comfortable context-switching between technologies and enjoy the variety - Understanding of distributed systems, event-driven architectures, and integration patterns - Ability to deliver independently while being a collaborative team member ## Nice to have - Prior experience in fintech, banking, or other regulated industries - Hands-on experience with Go, Python, or Java in production - Familiarity with PostgreSQL, DynamoDB, or similar data stores - Knowledge of CI/CD pipelines and containerized deployments ## What we offer - Hybrid work model — 2 days/week in our Warsaw office, rest remote - 20 days PTO on B2B - Real impact on financial products used by institutional clients across Europe - Exposure to a diverse, multi-stack tech environment and cloud-native architecture - A team that values engineering growth — we invest in building competences, not just shipping features - Relaxed yet professional culture in a rapidly growing company - Flex-time arrangements

🏢 Summary: Senior Frontend Engineer role focused on building and scaling a modern fintech platform for managing corporate spending. The position involves leading development of React and TypeScript-based SPA applications, integrating with microservices and APIs, and driving performance and architectural improvements. You will collaborate cross-functionally while mentoring engineers and shaping scalable front-end solutions in a cloud-native environment. 🗂️ Requirements: 5+ years professional software engineering experience, Strong commercial experience with React, Strong expertise in TypeScript, Advanced knowledge of modern JavaScript (ES6+), Experience building large-scale SPA applications, Experience designing scalable front-end architectures, Experience working with APIs and microservices-based systems, Hands-on experience with front-end testing (unit, integration, e2e), Experience with CI/CD pipelines, Experience with AWS, Experience with Kubernetes, Professional English proficiency (min. B2), Fluent Polish, Residence in Poland 📃 Skills: React, TypeScript, JavaScript, ES6, SPA, REST, GraphQL, Microservices, CI/CD, AWS, Kubernetes, Testing, SSR 🏢 Description: Join a team building a modern fintech platform that helps businesses manage company spending more efficiently. The project focuses on developing a financial product that enables seamless integration of financial tools—including corporate cards, expense management, and invoice processing—directly with partner ecosystems such as banks, accounting platforms, and HR systems. The platform empowers companies to automate financial operations, simplify reconciliation processes, and gain full real-time visibility into their spending. Your tasks Lead initiatives focused on designing, building, and maintaining scalable front-end applications primarily using React and TypeScript Build modern, performant, and intuitive user interfaces for key areas of the fintech platform Collaborate closely with cross-functional teams across backend engineering, product, and design to deliver scalable product solutions Integrate front-end applications with microservices-based architectures and APIs (REST / GraphQL) Analyze application performance and implement optimizations to ensure high responsiveness, reliability, and scalability Participate in code reviews, architecture discussions, and post-mortems while mentoring other engineers Proactively address technical debt and guide the team through technical challenges, refactoring initiatives, and architectural migrations Requirements At least 5 years of professional software engineering experience, including strong commercial experience with React Strong expertise in TypeScript, modern JavaScript (ES6+), and building large-scale SPA applications Solid experience designing scalable front-end architectures using component-based and modular design principles Experience working with APIs and distributed systems in microservices-based environments Hands-on experience with front-end testing frameworks (unit, integration, e2e) and observability/monitoring tools Previous work with CI/CD pipelines, cloud environments such as AWS, and container orchestration platforms like Kubernetes Strong problem-solving skills, ownership mindset, and passion for mentoring and elevating engineering teams Professional English proficiency - minimum B2 Fluent in Polish required Residing in Poland required Nice-to-have requirements Previous experience in fintech or building financial products Understanding of payments, cards, expense management, or accounting-related domains Experience working in a scale-up environment Experience with GraphQL, SSR, performance optimization, or building design systems 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: 12-month B2B contract for a Frontend Developer to build and enhance mobile and web features for a flagship cashback/loyalty application in a fast-paced Agile environment. The role focuses on React Native and React development for customer-facing apps and requires collaboration with US-based teams during CET afternoon hours. 🗂️ Requirements: 5+ years experience with React Native and React, Experience with GraphQL, Experience building customer-facing mobile and web apps, Experience with apps published on iOS and Android stores, Experience working in Agile teams, Availability to work 2pm–10pm CET 📃 Skills: React, ReactNative, GraphQL, TypeScript, Node.js, PostgreSQL, GCP, Redis, Docker, Kafka, Apollo, CI/CD 🏢 Description: Our client - a fast-growing US-based fintech - is looking to hire 2 strong Frontend Developers to help on an initial 12-month B2B contract, to work remotely. You will be working in an Agile team, dedicated to working on new features and products related to the companies flagship Cashback / Loyalty application. This will be a dynamic and fast-paced environment, working on both mobile and web apps. You must be comfortable working from 2pm-10pm CET, in order to have full consistency with the US teams. Requirements: 5+ years of experience working with React Native / React Familiarity with GraphQL Strong experience working with customer-facing mobile and web apps (B2C), that are live on iOS / Android stores Strong ability to work in agile teams, with good communication skills Experience with the following is not necessary , but are part of the wider tech stack and so any supplementary knowledge could be helpful: Typescript, Node.js, PostgreSQL, GCP, Redis, Docker, Apache Kafka, Apollo GraphQL, CI/CD tools

🏢 Summary: Senior React Front-End Developer role focused on building and maintaining scalable, platform-wide React libraries and components for a financial services environment. The position involves delivering high-quality, accessible, and performance-optimized front-end solutions aligned with a design system. You will collaborate with cross-functional teams to enhance shared components and support product teams with robust platform solutions. 🗂️ Requirements: 5+ years React frontend development experience, Strong JavaScript and TypeScript expertise, Experience building scalable frontend applications, Experience creating and maintaining NPM packages, Proficiency in unit and E2E testing, Advanced Git version control skills, Knowledge of WCAG accessibility standards, Experience with Jira Confluence Bitbucket, Good Polish and communicative English, Legal right to work in the EU 📃 Skills: React, JavaScript, TypeScript, NPM, CSS, Jest, TestingLibrary, Cypress, Git, WCAG, Jira, Confluence, Bitbucket, Microfrontend, ReactNative, Capacitor, WebView 🏢 Description: Unleash innovation at scale — shape the future of front-end technology! Warszawa-based opportunity with hybrid work model (2 days from the office) As a Senior React Front-End Developer – Financial Services , you will be working for our client, a leading financial institution, delivering robust and scalable front-end solutions. Join a team committed to building advanced platform components that empower seamless user experiences and drive digital transformation. Your main responsibilities: Develop and maintain platform-wide React libraries and components aligned with the Bank’s Design System. Implement and optimize generic functionalities and innovative technical solutions for front-end teams. Write and sustain comprehensive unit and end-to-end tests to ensure high-quality deliverables. Ensure consistency, performance, and accessibility standards are upheld across all solutions. Collaborate with cross-functional platform teams and UI/UX designers to refine components and share best practices. Provide technical guidance and support to product teams utilizing the platform solutions. Maintain clear and detailed documentation for developed components and functionalities. You're ideal for this role if you have: Over 5 years of professional experience in front-end development with React. Strong expertise in JavaScript, TypeScript, NPM, and CSS. Proven experience in building and maintaining scalable front-end applications and NPM packages. Excellent command of writing and maintaining unit and E2E tests (e.g., Jest, Testing Library, Cypress). Proficiency in Git version control, including branch management and advanced operations (rebase, cherry-pick, revert, squash). Good understanding of Web Accessibility (WCAG standards) and inclusive design principles. Experience working with Jira, Confluence, and Bitbucket. It is a strong plus if you have: Experience working with design systems or contributing to their development. Knowledge of microfrontend architecture and integration challenges. Experience with hybrid mobile applications such as React Native, Capacitor, or WebView. Familiarity with AI tools or agents in software development projects. Language required for the role: Good command of Polish and Communicative English. Eligibility for the 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. We offer you: ITDS Business Consultants is involved in many various, innovative and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people. The offer includes: Stable and long-term cooperation with very good conditions. Enhance your skills and develop your expertise in various industries. Work on the most strategic projects available in the market. Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years. Participate in Social Events, training, and work in an international environment. Access to attractive Medical Package. Access to Multisport Program. Access to Pluralsight. Flexible hours & remote work. You can report violations in accordance with ITDS’s Whistleblower Procedure available here . Ref. number 8871

🏢 Summary: Short-term B2B contract for a Fullstack Developer (Node.js + TypeScript) to build and maintain backend services for a regulated digital capital market platform in the fintech domain. The role focuses on developing scalable APIs, integrating KYC/AML providers, and implementing authentication, authorization, and investor management features. The project emphasizes code quality, security, and collaboration with cross-functional teams. 🗂️ Requirements: 3+ years commercial experience with Node.js, Strong knowledge of TypeScript, Experience building REST APIs, Experience with NestJS or similar framework, Experience with Prisma ORM or similar ORM, Understanding of authentication and authorization, Experience with relational databases, Experience writing automated tests, Knowledge of clean code principles, English for daily communication 📃 Skills: Node.js, TypeScript, NestJS, Prisma, REST, SQL, Jest, Supertest, Authentication, Authorization 🏢 Description: Description We are a technology company that started its journey in 2008. Our main headquarters is located in the picturesque city of Poznań, nestled by the beautiful Malta lake. For more than 17 years, we have been assisting companies in developing and implementing innovative fintech solutions. Leveraging our expertise in areas such as blockchain, online payments, and more, our clients can invent and develop cutting-edge solutions and services that keep them at the forefront of innovation. FULLSTACK DEVELOPER B2B: 80-100 PLN / hour START - 1 JULY TERM - 6 WEEKS LOCATION: POLAND (REMOTE) *We offer a hybrid work model, allowing you to balance office presence with remote work. However, it's important to note that the role emphasizes a stronger presence in the office to foster teamwork and effective communication. Requirements Key Duties and Services: A Roadmap to Your Professional Success Your Mission : We are looking for a Fullstack Developer (Node. js + TypeScript) to join a fintech project focused on building a regulated digital capital market platform. The system supports investor onboarding, KYC/AML verification, investor classification, access control, audit logging, and digital wallet infrastructure. You will work closely with senior engineers and architects to build scalable backend services and integrations with fintech and blockchain-related providers. Scope of services: Developing and maintaining backend services using Node. js + TypeScript Building and extending REST APIs for onboarding, authentication, and user management Integrating external KYC/AML and identity verification providers Implementing business logic for investor classification and access control Creating and maintaining database models using Prisma ORM Writing unit and integration tests (Jest, Supertest) Participating in code reviews and technical discussions Collaborating with frontend, mobile, QA, and product teams Supporting code quality, security, and system reliability Here’s the set we are required: 3+ years of commercial experience with Node. js backend development Strong knowledge of TypeScript Experience building REST APIs and backend systems Experience with NestJS or similar frameworks Experience with Prisma ORM or similar Understanding of authentication & authorization concepts Familiarity with relational databases Experience writing automated tests (Jest, Supertest or similar) Strong understanding of clean code principles and best practices Good communication skills and English for daily cooperation Nice to have: Experience with class-validator / DTO-based validation Familiarity with GraphQL (Apollo) Experience in fintech / banking / regulated environments Knowledge of KYC/AML processes Exposure to blockchain, wallets, or digital assets Career Advancement at Your Fingertips: Explore Opportunities with Us By joining us you will get: Work on a modern fintech platform with real regulatory requirements Collaboration with experienced senior engineers and architects Opportunity to work with KYC/AML, identity systems, and fintech integrations Influence on system design and backend architecture decision A strong engineering culture focused on quality, security, and scalability Navigating the Hiring Process: What does the recruitment process for that position look like? HR Screening with Talent Acquisition Specialist (30 min) Technical Interview (60 min) Interview with Delivery Manager (30 min) Job Offer

🏢 Summary: Principal Frontend Engineer role focused on leading the architecture of high-performance React and TypeScript applications for investment banking trading desks. The position sets technical direction, modernizing legacy internal frameworks and driving AI-assisted development practices. Includes ownership of Node.js BFF strategy and frontend testing standards in a hybrid setup. 🗂️ Requirements: 8+ years frontend engineering experience, Expert-level React, Expert-level TypeScript, Expert-level Node.js, Expert-level Cypress, Experience with AI coding assistants in production, Ability to architect high-performance frontend applications, Experience defining frontend testing standards 📃 Skills: React, TypeScript, Node.js, Cypress, JavaScript, AI, Copilot, Codeium, Neo, BFF 🏢 Description: Location: Krakow or Wroclaw (Hybrid: 3 days/week onsite) The Role Seeking a Principal Frontend Engineer for a global finance client. You will set technical direction for investment banking applications, bridging legacy internal frameworks with modern React and AI-assisted workflows. What You'll Do Architect high-performance React/TypeScript applications for trading desks Lead Node.js BFF layer strategy for complex UI state management Work with finance client's internal frameworks (Neo platform + internal design system) Define Cypress testing standards (e2e + component) across teams Drive adoption of AI coding assistants and establish best practices Must-Haves 8+ years frontend engineering experience Expert: React, TypeScript, Node.js, Cypress AI tools: Proven use of Copilot, Codeium, or similar in production Sounds like you? We'd love to chat! Send over your CV and meet the team 🚀

🏢 Summary: Backend Engineer role focused on building and maintaining high-performance financial ledger services that bridge traditional banking systems (ACH, WIRE, SEPA) with blockchain-based stablecoins. The position involves developing secure on-ramp and off-ramp pipelines, queue-based transaction processing, and integrations with banking and compliance infrastructure. The engineer will work on end-to-end integrations and testing within a TypeScript/Node.js environment. 🗂️ Requirements: Strong TypeScript skills with focus on type safety, Experience integrating banking or payment APIs (ACH, WIRE, BaaS), Experience with asynchronous pipeline architectures and queues, Understanding of blockchain concepts (minting, burning, transaction signing, permissions), Ability to write end-to-end integration tests against real APIs, Experience managing third-party service integrations 📃 Skills: TypeScript, Node.js, PostgreSQL, Vitest, ACH, SEPA, WIRE, Blockchain, Queues, KYC, API 🏢 Description: Backend Engineer (TypeScript) We're building a high-performance financial ledger connecting fiat payment rails and blockchains through service providers. We're looking for a backend engineer to work on integrations that bridge traditional banking (ACH, WIRE, SEPA) with on-chain stablecoins. What You'll Work On Building and maintaining services that connect Banking-as-a-Service providers to our network Implementing on-ramp (fiat to tokens) and off-ramp (tokens to fiat) pipelines with strong idempotency guarantees Designing queue-based processing pipelines for multi-step financial transactions Working with identity/compliance infrastructure: KYC certificates, selective disclosure, encrypted attribute sharing Publishing service metadata for decentralized discovery by wallets and other services Writing integration tests against real APIs and a local blockchain node Tech Stack TypeScript / Node.js (ESM) PostgreSQL Vitest Custom SDK ecosystem What We're Looking For Strong TypeScript skills with emphasis on type safety Experience integrating with banking/payment APIs (ACH, wire transfers, BaaS platforms) Comfort with asynchronous pipeline architectures (queues, retries, idempotency) Understanding of blockchain concepts (token minting/burning, on-chain permissions, transaction signing) Preference for integration tests over unit tests; ability to write tests that exercise real system behavior end-to-end Familiarity with explicit resource management patterns (AsyncDisposable, structured cleanup) Experience working with different third-party integrations Nice to Have Experience with KYC/KYB compliance flows and certificate-based identity Multi-currency system design (FX, per-currency fee structures, decimal handling) How We Work Strong code ownership Small team, high autonomy, direct impact on financial infrastructure Straightforward Recruitment: We respect your time. Our 2-step recruitment process is designed to be efficient and meaningful. Flexible Work Environment: Work from anywhere. Align with sprint goals and deliverables - we trust you to manage your productivity.

🏢 Summary: Mid-level Frontend Developer role in a greenfield fintech project building a large-scale banking platform from scratch. You will design and develop web and mobile user interfaces using React, shaping frontend architecture and standards within a cross-functional international team. The position offers real impact on core frontend services and architectural decisions from day one. 🗂️ Requirements: Commercial experience in frontend development (mid-level), Hands-on experience with React, Experience building web applications, Understanding of modern frontend architecture, Ability to integrate frontend with REST APIs, Fluent English (spoken and written), Availability to work from office 3 days per week 📃 Skills: React, JavaScript, TypeScript, REST, GCP, Flutter, CI/CD, HTML, CSS 🏢 Description: Salary: 500-800 pln/md B2B Work model: hybrid from Gdynia / Gdańsk / Warszawa / Rzeszów / Kraków (3 days per week from the office) Why choose this offer? Opportunity to build a fintech platform from scratch (greenfield project) Real impact on architecture and core frontend services from day one Collaboration within a cross-functional, international team Work on a large-scale financial platform in the banking domain Project We are building a fintech platform from the ground up for a financial institution operating in the banking products space. As a Frontend Developer, you will be part of a cross-functional squad responsible for designing and developing the user-facing layer of this greenfield product . You will work within a mixed frontend-backend squad, collaborating closely with your Tech Lead, Senior Developer, Business Analyst, and QA Engineer. This is a rare opportunity to define the frontend architecture, UI patterns, and user experience of a financial platform from scratch - covering both web and mobile channels. Responsibilities you'll have Design, develop, and maintain frontend applications across web and mobile channels Build responsive, performant, and accessible user interfaces using React Collaborate within a cross-functional squad (Tech Lead, Senior Developer, BA, QA, Backend Developers) Translate business requirements and UI/UX designs into clean, maintainable frontend code Integrate frontend applications with backend APIs and services Participate in code reviews, technical discussions, and architectural decisions Write clean, testable, and well-documented code following best practices Contribute to establishing frontend standards, component libraries, and development patterns Communicate progress, blockers, and technical decisions in English Expected competences and knowledge Solid commercial experience in frontend development (mid-level) Hands-on experience with React (web applications) Fluent English (spoken and written) Availability to work from the office 3 days per week (Warsaw, Kraków, Tricity, or Rzeszów) Understanding of modern frontend architecture and best practices Nice to have: Familiarity with Google Cloud Platform (GCP) Familiarity with Flutter Experience in financial services or banking domain Experience in greenfield projects Knowledge of state management patterns, design systems, and component-driven architecture Technologies you'll work with React REST APIs GCP (optional) Modern frontend tooling and libraries CI/CD pipelines Client – why choose this particular client from the Jit portfolio? The client is a fintech institution operating in the Kingdom of Saudi Arabia, focused on modernising its digital capabilities and expanding its offering for micro-SME customers. It is an organisation with a strong market presence and a clear strategic commitment to innovation, aiming to deliver banking experiences that are fully digital, user-friendly, and deeply integrated with day-to-day business needs. About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts . We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity . By supporting indigenous initiatives, we ensure the circulation of good energy.