Senior Software Engineer

AppGreat is one of the fastest growing global IT companies, supporting the highest tech organizations in the world with operations across Europe.

We are working with top talents and highly experienced management to ensure the world's leading technology companies meet all the business challenges that the future holds.

We are AppGreat! We are a young and ambitious company like no other!

WHY JOIN OUR DREAM TEAM?

The most important part of AppGreat is the team. From our founders to the last person, we are committed to creating a pleasant environment and a place where everybody feels like they belong.

We invest our people in any way we can, starting from the amazing atmosphere in the office, unique benefits and career growth opportunities.

We are looking for a Senior Backend Software Engineer to help build the engine behind the next generation of scalable, AI-native data infrastructure. In this role, you will focus on the design and development of backend services powering our massively distributed, high-performance combined analytical and vector database, a critical component of the clients AI data platform.

This is your opportunity to work at the intersection of low-level systems programming, distributed computing, and AI infrastructure, helping us push the boundaries of backend engineering for real-time, petabyte-scale data systems.

This role is open for applicants from Europe, UK&I only

RESPONSIBILITIES:

• Architect and implement core backend components for a distributed vector database using C/C++
• Design highly scalable distributed data-structures and algorithms optimized for performance, concurrency, and fault tolerance
• Develop backend services that enable fast search, efficient indexing, and real-time analytics over massive datasets
• Optimize system performance across multi-threaded and multi-node environments
• Ensure low-latency, high-throughput data access and manipulation across global deployments
• Collaborate closely with cross-functional teams to translate backend capabilities into real-world impact

REQUIREMENTS:

• 5+ years of experience in backend engineering, with strong proficiency in low-level C and C++
• Hands-on experience designing and building distributed backend systems or infrastructure at scale
• Experience with distributed data-structures, algorithms and system reliability patterns
• Expertise in multi-threaded programming, memory management, and performance tuning
• Proven track record of backend work on high-throughput databases, vector stores, or real-time processing engines
• Bachelor’s degree in Computer Science, Engineering, or equivalent experience

Nice to Have:

• Experience building or optimizing analytical or vector databases
• Familiarity with query engine internals, indexing techniques, or storage layer optimizations
• Knowledge of Python or Java for integration or tooling
• Bachelor's, Master’s or PhD in a related technical field (distributed systems, backend architecture, database internals)

Our offer:

• Attractive remuneration package;
• Excellent career growth opportunities;
• Flexible option for remote work;
• Comprehensive training and development programs!

@Appgreat we appreciate every application we receive. Please note that only candidates selected for the next stage of the recruitment process will be contacted. If your profile matches the role, our recruitment team will reach out to you directly.

Thank you for your interest in joining us, and we encourage you to stay connected through our LinkedIn and Career pages for future opportunities and insights from the IT market.