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sr fullstack java engineer with good javascript knowledge

Hiring from
Lithuania
Work type
Hybrid
Posted
Sep 28, 2026
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Sr. FullStack Java Engineer with good JavaScript knowledge

00067602081

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.



About Cognizant:
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.

Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.

Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws.

If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email CareersNA2@cognizant.com for roles based in the Americas or CareersIndia2@cognizant.com for roles based in India.

Benefits that help you thrive and grow

Our benefits program is built with you in mind—so you can enjoy a fulfilling, balanced and healthy life.

Financial wellbeing

We regularly review market data to ensure compensation reflects the value you bring. Your benefits extend beyond pay and may include retirement plans, financial education, etc.

Physical and mental health

We empower you to prioritize your wellbeing through paid time off, flexible working where possible, healthcare plans, counselling, our Mental Health Allyship program and more.

Your career, your way

With 350,000+ roles at Cognizant, you’ll have opportunities explore new technologies, industries and locations—and build the skills you need to grow your career.

Real-world impact

Think about the biggest brands you rely on. Chances are, they rely on us to help strengthen their business. Here, you’ll turn bold ideas into solutions that improve lives everywhere.

Your path to Cognizant

Here’s what you can expect from our hiring process. Please keep in mind that it may vary by role and location. Explore our FAQs to learn more.

Step 1: Apply to the right opportunity

Find an open role that matches your skills and career goals and show us why you’re the person for the job. Don’t see the right opportunity? Consider joining our Talent Community.

Step 2: Connect with your recruiter

If one of our recruiters sees a fit, they’ll set up a short intro call to learn more about you and how your experiences and skills match the role.

Step 3: Show off your skills

If you and our team would like to continue the process, you’ll interview with our hiring team. Some roles may also require technical assessments and/or client interviews.

Step 4: Decision time

Our team will then review each candidates’ potential to succeed in the role. This step may take some time because we want to find the right fit for both you and us—but you can count on us to keep you updated.

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