Role Description This role provides an exciting opportunity to contribute to the development of a next-generation billing and revenue platform used by businesses of all sizes. You will design, build, and maintain backend systems and APIs that power complex billing workflows, subscription management, and usage-based pricing models. Working in a cross-functional environment, you will collaborate closely with product, infrastructure, security, and operations teams to deliver scalable, reliable, and high-performance solutions. This position allows for direct impact on how customers operate their businesses while offering a fast-paced, autonomous, and entrepreneurial work environment. You will also have opportunities to mentor peers, solve challenging production issues, and help shape the technical direction of the billing systems. - Design, develop, and maintain backend services and APIs that support subscription, billing, and revenue operations - Collaborate with cross-functional teams including infrastructure, security, product, and operations to build scalable, reliable systems - Participate in designing next-generation billing workflows and financial management features - Debug and resolve production issues across services and multiple layers of the technology stack - Mentor and guide fellow engineers to improve code quality, architecture, and team practices - Deliver solutions with a user-first mindset, ensuring high performance, reliability, and maintainability Qualifications - 2–12+ years of experience in backend software development with high-quality coding skills in languages such as Go, Java, C/C++ - Hands-on experience contributing to or building large-scale distributed systems - Strong collaboration skills and ability to work across teams and contribute to peer success - Entrepreneurial mindset with ability to work autonomously and take ownership of projects - Preferred: familiarity with event-driven architectures, subscription management, usage-based billing, or financial reporting systems - Preferred: leadership or mentorship experience, and interest in financial infrastructure and revenue operations Benefits - Competitive salary with potential performance bonuses - Comprehensive healthcare, dental, and vision coverage - Flexible and remote-friendly work arrangements - Opportunity to work on high-impact systems used by thousands of businesses worldwide - Collaborative, autonomous, and innovative engineering environment - Professional development and mentorship opportunities

• Design, implement, and optimize 5G NR Layer 1 (PHY) components in modern C++ for low-latency, high-throughput processing. • Build and tune signal-processing blocks (OFDM modulation/demodulation, channel estimation, equalization, synchronization, MIMO/beamforming, HARQ, LDPC/Polar). • Apply multithreading, lock-free techniques, fixed-point arithmetic, and SIMD (SSE/AVX/NEON) vectorization to meet real-time KPIs. • Integrate close to hardware on embedded Linux (x86/ARM), optimize memory/I/O paths, and ensure cache-efficient data layouts. • Profile and debug performance (gdb, perf, valgrind, VTune), identify bottlenecks, and drive continuous improvements. • Define clean interfaces between L1 and upper layers (L2/L3) and O-RU; collaborate with system architects, protocol engineers, and QA teams to deliver carrier-grade features. • Write unit/integration tests (GoogleTest), support hardware-in-the-loop testing, and contribute to CI/CD and documentation. • Participate in code reviews and uphold high engineering standards.

• Architect and develop scalable, high-quality applications using modern .NET and Angular frameworks • Collaborate with business and technical stakeholders to translate requirements into effective technical solutions • Maintain high standards for code quality through documentation, testing, and peer reviews • Research and implement new technologies to keep the platform modern and competitive

• Design and implement Temporal workflows orchestrating multi-step AI operations (product attribution, image generation, outfit creation, copy generation) • Build backend services in Clojure integrating with LLM APIs (GPT, Gemini, etc.) • Manage prompts, context windows, streaming responses, and structured outputs • Design PostgreSQL schemas supporting complex AI workflows and vector embeddings • Implement RAG pipelines using Qdrant for semantic search and similarity matching • Develop ClojureScript UIs for human review and validation workflows • Build APIs and data pipelines that connect AI systems to the broader platform • Implement monitoring systems to track AI quality and reliability