Senior Full Stack Engineer

As a Senior Full Stack Engineer reporting to Senior Director of Software Engineering, you'll play a critical role in setting technical direction, owning architecture decisions, and enabling a new R&D team to take responsible AI solutions from concept to production in global financial markets. You'll thrive in this position if you're a hands-on engineer who leads through delivery, mentors with generosity, and brings rigorous thinking to problems that don't always have a defined answer from the start. Key Responsibilities Lead R&D and proof-of-concept deliveries for cloud-native solutions built on Java and React, setting the technical bar and driving architecture decisions end-to-end. Design and own secure integrations using REST and modern agent-to-agent protocols, ensuring services are reliable, observable, and production-ready. Establish and champion software engineering best practices across the team and organization, mentoring DevOps and software engineers at all levels. Drive cross-functional initiatives spanning testing, deployment, observability, operability, and security, contributing to requirement analysis and solution design. Promote the adoption of AI-assisted tooling across products and the software development lifecycle, and take on Agile process roles (e.g., Scrum Master or Product Owner) as needed to support team delivery. Required Qualifications Bachelor's degree in Computer Science, Engineering, or equivalent practical experience. Several years of experience in full-stack software engineering, with deep production-level Java expertise applying OOP and SOLID principles within frameworks such as Spring. Proven experience building modern, component-based web applications; React and TypeScript proficiency is strongly valued. Strong SQL competency including schema design, query performance, transactions, and data integrity. Solid Docker and Kubernetes knowledge, with the ability to guide containerization decisions and troubleshoot services in a cluster environment. Working familiarity with core AWS services relevant to architecture — including EKS, RDS, IAM, networking, and observability — and demonstrated experience setting technical direction and introducing AI-assisted workflows into the software development lifecycle. Preferred Qualifications Exposure to LLM or agent development, including function calling, retrieval-augmented generation, prompt engineering, or agent-tool protocols such as MCP. Experience designing secure APIs and authorization architectures using OAuth2/OIDC, scopes, and token flows, and basic familiarity with infrastructure-as-code tooling (e.g., Terraform or OpenTofu). Background in fintech, capital markets, or a regulated industry environment. This position will be located in Vilnius, Lithuania, and offers the opportunity for a hybrid work environment at least 3 days a week in-office, subject to change, providing flexibility and accessibility for qualified candidates. Benefits & Rewards We offer a competitive, well-rounded rewards package designed to support the financial, physical, and emotional well-being of our employees and their families (where applicable). The base pay for this role is from 4800 eur to 6000 eur gross. The actual pay depends on factors like your skills, experience, qualifications, and location. In addition to base pay, we offer short-term incentives (bonus or commission) and long-term incentives (equity), where applicable. We utilize a structured job architecture and career framework to ensure growth opportunities are transparent, fair, and accessible to all employees. The pay range you see reflects the full salary band for this job level, including room for progression over time. For more information, visit Nasdaq Benefits & Rewards Career Page . Come as You Are Nasdaq is an equal opportunity employer. We welcome applications from candidates of all backgrounds and identities. We are committed to fostering an inclusive workplace where diverse perspectives, experiences, and identities are valued and celebrated. We ensure that individuals with disabilities are provided with reasonable accommodation throughout the hiring process.