Senior AI Systems Engineer | Software Architect | Senior .NET Engineer

I architected a role-specialised multi-agent platform on an approximately 30,000-line Python runtime, using domain-driven boundaries, clean architectural layering, and strict per-agent tool-surface isolation.

I built and operate a 6-node self-hosted GPU inference fleet with 10 GPUs and roughly 496 GB VRAM, centred on a custom 4× RTX PRO 6000 Blackwell machine assembled by hand.

I also stood up local LLM serving on vLLM and SGLang with tensor parallelism and FP8/NVFP4 quantization, designed a role-replay evaluation harness, performed a REAP expert-prune of Qwen3.5-397B-A17B, and published the pruned model on Hugging Face.

I extended and maintained a large, long-running .NET application for the Estonian Transport Administration, translating architecture direction into detailed designs within a business-critical public-sector codebase.

I led and coached developers in an agile process, reviewed code, maintained engineering standards, and communicated requirements and trade-offs with stakeholders.

I built full-stack features spanning ASP.NET Core Web APIs, background processing, and Angular front ends, while integrating X-Road, eID, OAuth2, OpenID Connect, Microsoft SQL Server, Azure DevOps, and Application Insights.

I self-hosted and benchmarked open-weight large language models, building inference servers in Python and comparing quantization formats for quality and throughput.

I prototyped tool-using agents and orchestration patterns, including LangGraph-based workflows and multimodal experiments, taking ideas from concept to working demonstration.

I also trained and fine-tuned neural networks and turned working experiments into reusable architecture patterns, assembling the initial GPU hardware behind my current production fleet.

I maintained and extended a mature C# and .NET line-of-business client-server application used daily for core business operations, backed by AWS-hosted services on Docker and ECS.

I diagnosed complex, hard-to-reproduce production issues across a large legacy codebase and delivered long-term fixes without disrupting established workflows or SQL Server data integrity.

I delivered and maintained the hospital information systems of Põhja-Eesti Regionaalhaigla, one of Estonia's largest hospitals, as the primary project.

I modernised business-critical clinical and administrative software more than 20 years old, replacing legacy integrations with modern Web API surfaces without disrupting hospital operations.

I developed full-stack .NET modules and Angular hospital web front ends with Entity Framework and NHibernate over Microsoft SQL Server and PostgreSQL, using Docker, React, test-driven development, and Scrum.

I built and maintained .NET systems powering Estonian e-government registries used daily by citizens, businesses, and public authorities at national scale.

I modelled complex regulatory rules into reliable, auditable domain logic with validation, data consistency, and full traceability for legally significant records.

I also developed public e-services integrating national authentication and secure data-exchange infrastructure with high-availability production support.

I developed and maintained .NET reservation, ticketing, and payment systems for coach and bus operators, processing high volumes of financial transactions reliably through the full order lifecycle.

I built booking and fare logic, seat and inventory allocation handling, and payment-provider integrations, maintaining correctness and consistency under real-world load.

I developed and maintained modules of the Court Information System, the national platform managing court cases and proceedings for Estonia's judiciary.

I helped introduce domain-driven design and clean-code practices, coaching the team toward more maintainable enterprise software.

I developed core functionality for the Court Information System and other substantial public-sector .NET platforms as a software vendor to RIK.

I grew from foundational development into professional enterprise software-engineering practice alongside experienced engineers.

I administered servers, workstations, and computer networks, building solid networking fundamentals.

I also developed early internal .NET web applications, which helped establish my long-term path into software engineering.

Bachelor's degree in Computer Science.