Senior Counsel

🏢 Summary: The offer is for a Blockchain Integration Engineer working on Ledger Live, focused on expanding and enhancing blockchain integrations across web and mobile platforms. The role involves building secure, reliable integrations using modern JavaScript and TypeScript practices while collaborating with cross-functional teams. You will contribute to scalable architecture and testing strategies in the Web3 and digital asset security domain. 🗂️ Requirements: Strong JavaScript proficiency, Strong TypeScript proficiency, Experience with Web3 integration libraries, Basic understanding of blockchain architecture, Knowledge of state management and asynchronous programming, Experience with API and library integration, Understanding of functional programming concepts, Professional English proficiency 📃 Skills: JavaScript, TypeScript, Web3, Ethers.js, Blockchain, React, API, Git 🏢 Description: Hey! Nice to see you! At Incubly , we believe that great people want to work with great people, so we started to build a company that will attract great minds and that we can achieve everything not by feeling that we work, but just having fun. Our mission is to mainly support tech companies and startups (scaleups) in fast and high-quality scale-up of their teams and boost their product development, testing, and deployment; so, we can succeed together. We are currently working with a French company which is a leader in security and infrastructure solutions for cryptocurrencies and blockchain applications. It has a team of more than 400 professionals developing a variety of products and services to safeguard cryptocurrency assets, including worldwide leading hardware wallets. In this role you will help develop and evolve Ledger Live, collaborating closely with cross-functional teams to deliver reliable, secure, and seamless experiences across web and mobile platforms, while continuously growing, challenging yourself, and shaping the future of digital asset security Your daily responsibilities Work within the Ledger Blockchain Integration Team to enhance and expand Ledger Live’s blockchain integration coverage Apply expertise in JavaScript and TypeScript to solve complex technical problems and ensure smooth, reliable blockchain integrations for end users Utilize modern JavaScript practices, state management, asynchronous handling, and API/library management to improve integration workflows Collaborate with cross-functional teams and external partners to optimize blockchain integration architecture Implement functional programming approaches to maintain a clean, side-effect-limited codebase Contribute to scaling and improving testing strategies to ensure high-quality, reliable integrations We need you to have A passion for coding and deep interest in the TypeScript ecosystem A service-oriented mindset with a commitment to delivering high-quality solutions Familiarity with Web3 integration libraries such as Ethers.js Basic understanding of blockchain architecture Interest in or initial experience with functional programming (in JavaScript or any FP language) Curiosity about decentralized systems and emerging blockchain technologies Professional fluency in English Would be great if you have Experience with React and modern frontend development Experience developing DApps or Web3 wallet software Our offer In addition to great company and challenging projects, we can offer much much more, i.e. Agile and friendly atmosphere, non-violent communication, and full respect for diversity Possibility to choose from onsite (in Lodz, Poland) or hybrid work (2-3 days a week in our office in Łódź city centre). Business trips to Paris as needed, typically once every three months Remuneration on B2B: 1300- 1500 zł net/ MD

🏢 Summary: B2B role in a FinTech cryptocurrency project focused on full-cycle development and maintenance of a legacy platform. The position involves building new features, working with complex legacy code, and extracting business logic directly from undocumented systems. Long-term engagement with a US client requiring overlap with US working hours. 🗂️ Requirements: Strong proficiency in Java, Hands-on experience with Spring framework, Experience with Microservices architecture, Practical knowledge of gRPC, Solid knowledge of MySQL, Experience with Kafka, Ability to work with and refactor legacy codebases, Experience in full-cycle software development 📃 Skills: Java, Spring, Microservices, gRPC, MySQL, Kafka, Refactoring, SQL 🏢 Description: Join an internal development team supporting a US-based FinTech client in the cryptocurrency sector. You will work on a mix of new features and maintenance of an existing legacy system. This role requires a "detective" mindset—often, the business and technical logic must be extracted directly from the code, as documentation may be sparse. Details Client Location: USA Rate: 110-130 PLN/h net + VAT (B2B) Start Date: ASAP (within 1 month). Duration: Long-term (no defined end date). Working Hours: Availability until 17:00–17:30 CET (ensuring a 2-hour overlap with the US). Equipment: Dedicated laptop provided (includes an activity tracker, currently inactive but present). Responsibilities Full-Cycle Development: Developing new functionalities and maintaining the existing crypto platform. Legacy Management: Working with "spaghetti code" and legacy architectures to ensure stability and growth. Technical Research: Independently discovering business and technical logic within areas where the client lacks documentation. Collaboration: Participating in weekly cross-team "Grand Dailies" and ad-hoc meetings with the Product Owner. Communication: Direct, fluent communication with the US-based client. Requirements Technical Requirements Core: Strong proficiency in Java and Spring framework. Architecture: Hands-on experience with Microservices and gRPC . Data & Messaging: Solid knowledge of MySQL and Kafka . Problem Solving: Ability to navigate and refactor complex, undocumented legacy systems. Soft Skills Proactivity: High level of independence in seeking information and solving technical debt. English: Excellent verbal and written communication (Fluent/B2+). Teamwork: Maturity in working within a self-managed team structure.