Senior Full-Stack Developer

Lead design, development, and maintenance of enterprise-grade full‑stack applications across desktop, web, and database platforms.

Cluj-Napoca, Cluj County, Romania
Full-time
Posted Nov 6, 2026

INDUSTRYSoftware & InternetSaaS & Enterprise Software

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Responsibilities

Design, develop, test, and maintain full‑stack applications using Java 17, Java Swing, PHP, JavaScript, HTML, CSS, and PostgreSQL.
Develop reusable components, services, and libraries.
Implement and consume RESTful APIs and integration services.
Ensure applications are secure, scalable, and performant.
Participate in technical design and architecture discussions.
Evaluate new technologies and propose improvements.
Define coding standards and best practices.
Contribute to modernization and migration initiatives.
Design and optimize PostgreSQL databases, schemas, stored procedures, and queries.
Monitor database performance and implement tuning strategies.
Ensure data integrity, security, and backup/recovery practices.
Support, develop and maintain components written in C++ and C#.
Develop integration points between legacy and modern applications.
Troubleshoot issues across multiple technology stacks.
Write clean, maintainable, documented code.
Conduct code reviews.
Maintain automated tests.
Participate in CI/CD and deployment activities.
Resolve production and performance issues.
Mentor junior and mid‑level developers.
Collaborate with Product Owners, QA, Architects, and Business Analysts.
Participate in sprint planning and technical reviews.
Act as a technical subject matter expert.

Requirements

Bachelor's degree in Computer Science, Software Engineering, Information Technology or related field.
Experience in a Medical
Experience in a Telecommunications
Experience in a Industrial automation
Experience in a Enterprise software

Nice to have: React, Angular, Vue.js, Linux-based deployment environments, Docker, Containerized applications, CI/CD pipelines, Azure, AWS, Legacy systems modernization

Skills

Java 17Java SwingJavaScript (ES6+)PHP HTML5 CSS3 PostgreSQL C++C#REST API design and developmentSQL query optimizationGit version controlObject‑Oriented ProgrammingDesign patternsSoftware architecture principlesApplication debuggingPerformance optimizationUnit and integration testingJavaJava SwingJavaScript PHP HTML CSS PostgreSQL C++C#REST API Git Docker CI/CD Azure AWS

Full description

We are seeking an experienced Senior Full-Stack Developer to join our software engineering team. The ideal candidate will have extensive experience designing, developing, and maintaining enterprise-grade applications across desktop, web, and database platforms. This role requires strong expertise in Java Swing, JavaScript, PHP, HTML, CSS, and PostgreSQL, along with working knowledge of C++ and C# to support integration, maintenance, and enhancement of existing software products. The successful candidate will be responsible for delivering high-quality software solutions, contributing to system architecture decisions, mentoring junior developers, and collaborating with cross-functional teams to translate business requirements into scalable and maintainable applications. Key responsabilities Application Development · Design, develop, test, and maintain full-stack applications using Java 17 and Java Swing, PHP, JavaScript, HTML, CSS, and PostgreSQL. · Develop reusable components, services, and libraries. · Implement and consume RESTful APIs and integration services. · Ensure applications are secure, scalable, and performant. System Architecture & Design · Participate in technical design and architecture discussions. · Evaluate new technologies and propose improvements. · Define coding standards and best practices. · Contribute to modernization and migration initiatives. Database Management · Design and optimize PostgreSQL databases, schemas, stored procedures, and queries. · Monitor database performance and implement tuning strategies. · Ensure data integrity, security, and backup/recovery practices. Cross-Technology Development · Support, develop and maintain components written in C++ and C#. · Develop integration points between legacy and modern applications. · Troubleshoot issues across multiple technology stacks. Quality & DevOps · Write clean, maintainable, documented code. · Conduct code reviews. · Maintain automated tests. · Participate in CI/CD and deployment activities. · Resolve production and performance issues. Leadership & Collaboration · Mentor junior and mid-level developers. · Collaborate with Product Owners, QA, Architects, and Business Analysts. · Participate in sprint planning and technical reviews. · Act as a technical subject matter expert. Required Qualifications Education Bachelor's degree in Computer Science, Software Engineering, Information Technology or related field. Experience · 5+ years of professional software development experience. · Proven experience in full software development lifecycle (SDLC). · Experience working in Agile/Scrum environments. Technical Skills (Required) Expert Level · Java 17 + Java Swing · JavaScript (ES6+) · PHP · HTML5 · CSS3 · PostgreSQL Intermediate / Good Working Knowledge · C++ · C# Additional Technical Competencies · REST API design and development · SQL query optimization · Git version control · Object-Oriented Programming (OOP) · Design patterns and software architecture principles · Application debugging and performance optimization · Unit and integration testing Preferred Qualifications · Experience with modern JavaScript frameworks such as React, Angular, or Vue.js. · Experience with Linux-based deployment environments. · Familiarity with Docker and containerized applications. · Understanding of CI/CD pipelines. · Experience integrating desktop and web applications. · Knowledge of cloud platforms such as Azure or AWS. · Experience working with legacy systems modernization. Soft Skills · Strong analytical and problem-solving abilities. · Excellent communication and interpersonal skills. · Ability to work independently and as part of a team. · Strong ownership and accountability mindset. · Ability to mentor and lead technical discussions. · Adaptability and willingness to learn new technologies. Success Metrics · Deliver high-quality software on schedule. · Maintain low defect rates and high code quality standards. · Improve application performance, reliability, and scalability. · Contribute to architectural improvements and technical innovation. · Provide leadership and mentorship within the development team. Nice-to-Have Experience · Medical, telecommunications, industrial automation, or enterprise software domains. · Legacy desktop application maintenance and modernization. · Multi-tier and client-server architectures. · Cross-platform development involving Java, PHP, C++, and C# ecosystems. This profile would fit a senior engineer capable of owning both legacy desktop applications (Java Swing) and modern web systems (PHP/JavaScript/PostgreSQL) while supporting integrations and components developed in C++ and C#. Join Us At Ascom, we believe recruitment is a two-way decision. We are not only looking for someone to join us — we are looking for someone who also chooses us as their next employer. If you are looking for a role where you can make an impact, work with modern technologies, and contribute to global operations — we would love to hear from you.