Its fun to work in a company where people truly BELIEVE in what theyre doing!  Were committed to bringing passion and customer focus to the business.<h2>About Us</h2>Kyriba is a global leader in liquidity performance that empowers CFOs, Treasurers and IT leaders to connect, protect, forecast and optimize their liquidity. As a secure and scalable SaaS solution, Kyriba brings intelligence and financial automation that enables companies and banks of all sizes to improve their financial performance and increase operational efficiency. Kyriba’s real-time data and AI-empowered tools empower its 3,000 customers worldwide to quantify exposures, project cash and liquidity, and take action to protect balance sheets, income statements and cash flows. Kyriba manages more than 3.5 billion bank transactions and $15 trillion in payments annually and gives customers complete visibility and actionability, so they can optimize and fully harness liquidity across the enterprise and outperform their business strategy. For more information, visit <a href="http://www.kyriba.com/" target="_blank">www.kyriba.com</a>.Location: Poland remote Contract type: B2B (till end of 2026)Contract terms: B2B contract till end of 2026<h3>About Kyriba</h3>Kyriba is the global leader in cloud-based treasury, cash and risk management solutions, delivering SaaS financial technology to large enterprises. Over 2,000 organizations worldwide use Kyriba to enhance cash visibility, improve financial controls, and increase productivity across cash &amp; liquidity, payments, and risk operations. Headquartered in San Diego, with major offices in New York, Paris, London, and Tokyo; development centers are primarily in France, Poland, and the US.We’re hiring a Senior Backend Engineer with strong hands-on experience in both Java (Spring Boot) and TypeScript (Node.js with Express or Nest.js). You’ll help build resilient, secure, and scalable financial systems, champion quality and automation, and mentor others.<h3>Team and Ways of Working</h3><ul><li>Distributed teams in France and Poland; Agile (Scrum/Kanban).</li><li>Stable product, clear roadmap, and continuous improvement culture.</li><li>200+ motivated engineers, QA, and product colleagues collaborating across squads.</li></ul><h3>Key Responsibilities</h3>Co-design service and API architecture across Java and Node.js stacks with a focus on availability, resiliency, security, performance, and cost.Deliver end-to-end features: refine requirements with Product Owners, implement, test, and review code.Improve existing services via refactoring, performance tuning, and reliability enhancements.Strengthen test automation (unit, integration, contract, E2E) and CI/CD.Mentor engineers and contribute to engineering standards and documentation.Support DevOps practices: containerization, deployment, and observability.<h3>Qualifications</h3>Experience<ul><li>7+ years of professional backend development overall.</li><li>5+ years in Java with Spring Boot ecosystem.</li><li>3+ years in TypeScript with Node.js (Express or Nest.js).</li><li>Production experience designing and operating scalable, secure services.</li></ul>Core Skills (Java)<ul><li>Strong Java fundamentals, collections, concurrency, JVM basics.</li><li>Spring Boot (DI, Web/REST, Data/JPA, Security), JPA/Hibernate.</li><li>Build tools (Gradle); testing (JUnit, Postman).</li></ul>Core Skills (TypeScript/Node.js)<ul><li>Modern TypeScript (types, generics, decorators) and Node.js fundamentals.</li><li>Express or Nest.js (modules/providers/controllers, middleware/guards/interceptors).</li><li>Testing with Jest, supertest; API schema/OpenAPI and validation.</li></ul>APIs and REST<ul><li>Strong understanding of RESTful API design, versioning, and error handling.</li><li>Experience with API documentation (OpenAPI/Swagger) and client/contract alignment.</li><li>Familiarity with idempotency, pagination, filtering, rate limiting, and secure API patterns.</li></ul>DevOps &amp; Cloud<ul><li>CI/CD (Jenkins or GitHub Actions), artifact/version management.</li><li>Docker; Kubernetes experience is a strong plus.</li><li>IaC exposure (Helm/Terraform) is an advantage.</li></ul>Engineering Excellence<ul><li>SOLID, clean architecture, and DDD-aligned design.</li><li>Secure coding and auth patterns (OAuth2/OIDC, JWT, OWASP).</li><li>Effective communication in English; ability to read/refine user stories.</li><li>Agile Scrum/Kanban experience.</li></ul>Nice to Have<ul><li>Basic knowledge of React frontends (component model, hooks, consuming REST APIs).</li><li>Experience in payments, finance, or risk domains.</li><li>Multi-tenant SaaS and compliance experience.</li></ul>