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Cognizant

Sr. FullStack Java Engineer with good JavaScript knowledge

Cognizant
Lithuania · Full-time · Not Applicable
As a senior software engineer you will join a skilled team of engineers building a unique product for financial data reporting. Green field project with a mixed tech stack and microservice architecture.

You will play a role in developing using Java, Spring, Spring Boot, PostgreSQL, Javascript and Typescript and working with Node Js, react, redux and saga.

Your main focus would working in the team which works on very specific component in the application. You should have exceptionally strong understanding in JavaScript (structures, performance, etc.). You should have exceptional skills with React + Redux, NodeJS, Typescript, Redux Saga. Strong skills with PostgreSQL. Additionally you should have strong JAVA, Spring and Spring Boot knowledge. Have experience working with large scale cloud based applications (Azure).

Key Responsibilities – Java/JS Fullstack Developer

  • Software Development: Design, develop, and maintain scalable fullstack applications using Java (Spring Boot) and React.js.
  • Code Quality & PR Review: Conduct thorough peer reviews of pull requests to ensure code quality, maintainability, and adherence to best practices.
  • Scrum Ceremonies: Actively participate in Agile ceremonies including daily standups, sprint planning, retrospectives, and backlog grooming.
  • Mentorship & Collaboration: Mentor junior developers, share knowledge across the team, and foster a culture of continuous learning.
  • Frontend Engineering: Build responsive and user-friendly interfaces using React, Redux, and modern UI libraries.
  • Backend Engineering: Develop robust RESTful APIs and microservices using Java, ensuring performance, security, and scalability.
  • Database Design & Optimization: Work with SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, Cassandra) databases to design schemas, write efficient queries, and optimize performance.
  • Testing & Automation: Implement unit, integration, and end-to-end tests using tools like JUnit, Mockito, Cypress, or Selenium.
  • DevOps & CI/CD: Collaborate on CI/CD pipelines, containerization (Docker), and deployment strategies using tools like Jenkins or GitHub Actions.
  • Documentation & Reporting: Maintain clear technical documentation and provide regular updates on progress and blockers.

Requirements

  • Bachelor or Master of Science
  • 4-5 years experience in software development
    • JavaScript: Deep understanding of core JS concepts including closures, async programming, and ES6+ features.
    • React + Redux + Redux Saga + TypeScript: Building scalable, maintainable, and high-performance SPAs with advanced state management and typed components.
    • Advanced HTML & CSS (huge plus): Semantic markup, accessibility, responsive design, and cross-browser compatibility.
    • ECMAScript 6+ (Expert level): Proficient in modern JS syntax and features such as arrow functions, destructuring, modules, promises, and async/await.
  • Node.js: Building RESTful APIs, microservices, and real-time applications with Express or similar frameworks.
  • Java, Spring, Spring Boot: Developing robust backend services, integrating with databases, and implementing business logic with enterprise-grade frameworks.
  • PostgreSQL: Schema design, query optimization, and transactional integrity.
  • Redis: In-memory data storage for caching, session management, and pub/sub messaging.
  • Application monitoring using tools like Prometheus, Grafana, ELK Stack, or New Relic to ensure uptime, performance, and quick issue resolution.
  • Experienced in Scrum of Scrums, sprint planning, retrospectives, and backlog refinement.
  • Comfortable working in cross-functional teams and managing dependencies across squads.
  • Strong communication skills for gathering requirements, presenting solutions, and managing expectations.
  • Experience in stakeholder engagement, demo sessions, and feedback incorporation.
  • Flexibility to work on backend or frontend.
What We Offer

  • Opportunity to be part of a global organization.
  • Encouraging working atmosphere, engaging activities, and extra benefits (e.g. additional medical insurance (covers gym subscription), team events, outreach activities, and others);
  • Hybrid work model with remote work opportunities ( 3/5 days weekly from the office)
  • Open, modern, and ergonomic work environment when working from the office with the multicultural community.
  • Opportunity to grow professionally and personally (e.g. Udemy) and continuously develop within the domain.
  • The salary range for this position is from 4.485 to 5.950 EURO gross before taxes.*
  • Salary offer for the candidate is determined based on the predefined salary ranges for the position and depends on the level of competence and experience of the candidate.
  • Cognizant, as a digital company, makes employee health and safety its top priority. With that in mind, we are implementing virtual hiring and work practices which means all interviews will be conducted online as well as live from the office
  • We will be looking forward to Your CV. Only suitable candidates will be contacted within 7 days from application.
  • Stay up to date with our website https://www.cognizant.com/lt/en
  • We are an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status.

Key Skills

Ranked by relevance

spring boot java typescript postgresql react microservices restful apis javascript responsive cicd responsive design containerization prometheus cassandra outreach jenkins node js grafana storage docker nosql mysql cloud scrum junit css sql elk ui
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Posted
Apr 09, 2026
Type
Full-time
Level
Not Applicable
Location
Vilnius
Company
Cognizant

Industries

IT Services IT Consulting Business Consulting Services

Categories

Engineering Information Technology

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