Senior Backend Engineer

About Aivar Innovations Aivar Innovations is an AI-native services and software company and AWS Preferred Partner, backed by Bessemer Venture Partners and Sorin Investments. Aivar builds accelerator platforms that help enterprises run AI in production. Velogent is our governed agentic process automation accelerator for regulated industries, where every data movement and decision must be safe, isolated and auditable. The Role We are looking for a Senior Backend Engineer to own the Velogent platform end to end : its architecture, its processing pipeline and its production health. You will take the six-stage pipeline, from ingestion to output, from design to a reliable multi-tenant service running at enterprise scale. This is a platform ownership role, not a feature-delivery role. You decide how the system is built, you carry it in production, and you fix it when it breaks. What Makes This Role Different Full ownership. You have built a platform or product architecture from the ground up and stayed accountable for it afterwards. Production accountability. You have run live systems, led performance investigations and owned incident response. Real scale. You have operated distributed systems that served 10,000+ users and know what changes in design as load grows. Key Responsibilities Architecture and ownership Own the Velogent platform architecture, technical roadmap and design decisions across all six pipeline stages, from ingestion to output. Write and maintain architecture decision records, capacity plans and reliability targets (SLOs) for the platform. Lead production operations: monitoring, on-call, incident response, root-cause analysis and performance tuning. Pipeline and orchestration Design the core pipeline orchestration framework in async Python, supporting parallel and sequential stage execution with retries and dead-letter queues. Design the event-driven architecture with message queuing, backpressure handling and graceful degradation. Build the reconstruction module that turns extracted data into Markdown and vector representations and context maps. Connectors, safety and compliance Build the connector framework for 50+ enterprise data sources (APIs, databases, file systems, SaaS platforms). Implement the safety layer: PII/PHI detection, data integrity checks, format compliance and input sanitisation. Implement an immutable audit trail across all six stages, recording every decision, action and transformation. Build multi-tenant data isolation so customer data stays strictly separated at every stage. Engineering leadership Set engineering standards for testing, CI/CD, observability and code review. Mentor engineers and raise the technical bar for the team. Partner with product, solution architects and customer delivery teams to turn customer requirements into platform capability. Must-Have Qualifications 6 to 10 years of backend engineering experience, including 2+ years building data-intensive…