Feeny
WISE INTEGRATION

Lead Senior Software Engineer – JavaScript, TypeScript, Node.js, React_based in Kaunas (Lithuanian citizens only) at WISE INTEGRATION (Kaunas, Lithuania)

WISE INTEGRATION· Kaunas, Lithuania·

Role details

Work type
Hybrid
Level
Lead

Job description

Hitcontract is looking for a Lead Senior Software Engineer for an international client – a global technology and business consulting organization delivering digital solutions and large-scale software projects for clients worldwide.

The company operates in a multicultural, international environment and works with modern technologies to develop and maintain complex enterprise-level applications.

We are looking for an experienced Lead Senior Software Engineer to join a team working across the full software development lifecycle. The role focuses on both front-end and back-end development, with JavaScript/TypeScript, Node.js, React, GraphQL, REST APIs, databases, and messaging systems at its core.

The successful candidate will also play a key role in technical leadership, contributing to architecture and development practices while collaborating closely with engineers, product managers, stakeholders, and other teams.

Key Responsibilities

  • Participate in and lead Agile ceremonies, including sprint planning, stand-ups, and retrospectives.
  • Collaborate with team members and stakeholders to gather and understand requirements for new features and enhancements.
  • Develop and maintain front-end web components using React, TypeScript, HTML, and CSS.
  • Design and develop software solutions using Node.js, GraphQL, and JavaScript frameworks and middleware.
  • Build and consume RESTful web services and APIs.
  • Apply software architecture and design principles, including DDD, CQRS, and Clean Architecture.
  • Write unit and integration tests to ensure code quality, reliability, and maintainability.
  • Participate in code reviews and provide constructive technical feedback.
  • Troubleshoot, debug, and resolve complex technical issues.
  • Contribute to the continuous improvement of software development processes, tools, and practices.
  • Communicate effectively with stakeholders and team members to ensure project objectives are achieved.
  • Stay up to date with emerging technologies and industry trends and identify opportunities to improve development practices.
  • Provide technical leadership and support to other team members.

Requirements

  • 6+ years of professional experience with JavaScript, TypeScript, Node.js, React, HTML/CSS, and SQL.
  • Strong experience in both front-end and back-end development.
  • Proven team leadership experience, either in a technical leadership or managerial capacity.
  • Strong understanding and practical experience with:
  • Node.js
  • React
  • TypeScript / JavaScript
  • SQL
  • GraphQL
  • REST APIs
  • CI/CD pipelines
  • Message brokers
  • ORM
  • Strong knowledge of Domain-Driven Design (DDD), CQRS, and Clean Architecture.
  • Experience working in Agile development environments.
  • Excellent communication and collaboration skills.
  • Good command of English.

Nice to Have

  • Knowledge of Vanilla JavaScript.
  • Understanding of V8.
  • Experience with WebAssembly.
  • Experience working with complex enterprise applications and large-scale software systems.
  • Experience mentoring and supporting other engineers.

What Is Offered

  • The opportunity to join an international technology and business consulting organization working on complex, large-scale digital solutions.
  • An encouraging and collaborative working environment with a multicultural community.
  • Additional benefits, including private medical insurance with gym coverage, team events, outreach activities, and other employee benefits.
  • Hybrid working model with the opportunity to work remotely and from the office, with approximately 3 days per week in the office.
  • An open, modern, and ergonomic office environment.
  • Opportunities for professional and personal development, including access to learning platforms such as Udemy.
  • The opportunity to continuously develop your technical expertise and take on technical leadership responsibilities.

Salary

€6,000–€7,300 gross per month, before taxes.

Why work at WISE INTEGRATION

  • Culture: Emphasizes innovation, respect, diversity, and service. Described as “stimulating, supportive, collaborative, and inclusive” with a global team encouraged to contribute.
  • Work Policy: Hybrid workspace (employees combine remote and on-site work). Typical on-site presence expected.
  • Team & Growth: Fast-growing deeptech startup with a small, cross-functional team (30–40 people) across three continents. Opportunity to have high impact.
  • Locations: Offices in Hyères and Grenoble (France), Ottawa (Canada), and Taipei (Taiwan). International exposure.
  • Tech Stack: Work with C, Python, LabVIEW, MATLAB, Altium, Linux, and signal processing tools.

Application questions