Software Engineer III (C/C++)

It's fun to work in a company where people truly BELIEVE in what they're doing!

Job Description Summary:

We’re looking for curious and driven engineers to join the jBASE team. Our MV Application Server (MVAS) combines a high‑performance embedded database with a modern application platform designed for scalable, mission‑critical systems. Joining our global engineering group means working in an environment that values flexibility, personal growth, and a healthy work‑life balance — all within a stable, well‑established business. Whether you’re based in Vilnius or elsewhere in Lithuania, we offer the flexibility to work in a way that best supports your productivity and work‑life balance.

As part of this growth, we are seeking an experienced C/C++ Software Engineer to help build and enhance our high‑performance, low‑level systems. If you enjoy solving complex technical challenges, and contributing directly to core platform components, this role will be an excellent fit.  

What You Will Do

• Develop and maintain high‑performance C/C++ applications.
• Work with core database components, optimize queries, and improve execution efficiency.
• Troubleshoot complex issues using advanced debugging tools.
• Collaborate across teams to enhance system performance, reliability, and scalability.
• Contribute to system‑level design decisions involving operating systems, concurrency, and memory management.
• Operate in both Windows and UNIX environments.

Required Qualifications

• 4 + years of hands‑on experience with C/C++ development.
• Strong understanding of database fundamentals (ACID, indexing, query optimization, transactions, concurrency).
• Solid knowledge of operating systems: memory management, processes/threads, file I/O, file systems, POSIX APIs.
• Understanding of networking and basic security principles.
• Familiarity with data structures (queues, linked lists, hash tables, trees).
• Familiarity with algorithms (searching, sorting, hashing).
• Experience with gdb, Valgrind or similar debugging tools.
• Strong analytical, debugging, and problem‑solving skills.
• Experience with application performance optimization.
• Experience working with Windows and UNIX systems.

The following points are “nice-to-have” qualifications and not required for joining the team.They simply provide additional context about our tech stack and focus areas. If you only match a portion of them — great. If not — you can learn many of these on the job.

• Experience with MultiValue databases.
• Background in database kernel development or low‑level database internals.
• Familiarity with AI-assisted development tools (GitHub Copilot, Claude, Cursor).
• Basic understanding of machine learning or AI concepts.
• Ability to evaluate and integrate AI‑based development tools.
• Knowledge of compiler architecture (lexing, parsing, semantic analysis, code generation).
• Experience with GCC/Clang toolchains or custom compiler components.
• Exposure to build systems, linkers, and runtime environments.
• Experience writing test cases and working with automation/testing frameworks.
• Knowledge of additional languages/technologies: Python, Java, HTTP, client‑server architecture, RPC, XML, JSON.
• Understanding of security: encryption, authentication, authorization.
• Experience working with cloud or virtualized environments (AWS, Azure, VMware, containers, WSL).
• Experience in an Agile environment (JIRA, Confluence).

...

What Rocket Software can offer you in Vilnius:

• Health Insurance from Day 1: Choose from 3 great options!

• Generous Time Off: Unlimited annual leave holidays, plus Juneteenth as an extra day off for everyone.

• Rocket enhanced parental leave benefit.

• Employee Assistance Program – Digital Courses & Meditations, Certified Personal Coaching & Personal Therapy sessions.

• Workcation Policy: Enjoy the flexibility to work from a vacation spot, combining work and leisure.

• Choose your own hybrid/remote work model.

• Tuition Reimbursement and Certificate Reimbursement Program opportunities.

The base salary range for this role is €40,500.00 - €68,850.00 /year. Exact compensation may vary based on skills, experience, and location.

Salary range applies only to candidates in Lithuania

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.

Rocket Software Inc. is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Rocket Software Inc. is also committed to compliance with all fair employment practices regarding citizenship and immigration status.

As part of our commitment to a safe and trustworthy workplace, we include background and reference checks in our hiring process.

Rocket is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities.  If you need special assistance or an accommodation while seeking employment, please call: 781-577-4321 or send an email to people@rocketsoftware.com.  We will make a determination on your request for reasonable accommodation on a case-by-case basis.

If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!