Senior C++ Developer/ Engineer

Senior • Hybrid

$27,000 - $37,000/

Warsaw, Poland

Senior C++ Software Engineer

Global Data Transfer & High-Performance Systems | U.S. Tech Company

As BestHR (employment agency no. 11671), we are partnering with a highly respected U.S. technology company that builds mission-critical software enabling secure, high-speed, and reliable transfer of digital assets. Their solutions are trusted by leading global brands across multiple industries.

If you want to work on extremely high-performance systems operating at massive scale—this role is for you.

Your Responsibilities

Develop new features for a high-performance enterprise application (billions of files, tens of Gbps throughput)
Work end-to-end: concept → PoC → implementation → production release
Create automated tests (unit + functional)
Support customers and internal teams in solving complex product issues

Requirements

Strong experience in large-scale C++ development (Windows and/or Linux)
Cross-platform development (Windows/Linux); macOS is a plus
Proficiency with debugging/profiling tools (Win/Linux)
Solid knowledge: C++11/14/17/20
Experience with automated testing
Background in high-performance systems (large object sets, heavy network load, CPU/RAM-critical operations)
Knowledge of low-level OS APIs (Windows, POSIX) – networking, filesystems, security, multithreading
Basic understanding of networking protocols and cryptography
Very good English

Nice to Have

Kernel-level development (Windows/Linux)
Experience with FUSE or similar FS frameworks
Familiarity with AWS/Azure/GCP APIs

We Offer

UoP or B2B – long-term cooperation
Attractive salary
Multisport
Medicover
E-learning platforms
Supportive, technical environment

BestHR

The company is a highly respected U.S. technology firm specializing in the development of mission-critical software that facilitates secure, high-speed, and reliable digital asset transfers. Their solutions are utilized by leading global brands across various industries, indicating a strong reputation and trust in their products. The company operates in the technology industry, focusing on high-performance systems that manage massive-scale operations. They are known for their expertise in creating software that handles billions of files and high throughput, emphasizing their capability in managing large-scale, complex systems. The company's mission revolves around enabling secure and efficient digital asset transfers, highlighting their commitment to security and performance. They value innovation, reliability, and technical excellence, as evidenced by their focus on high-performance and secure software solutions.