Remus Dutulescu

Long-term B2B engagement with one of the world's largest online media companies, owning business-critical payments projects analysis-first — from technical proposal to turnkey delivery.

• Core contributor since inception to the unified purchase gateway — the payments platform behind the company's entire catalogue, moving tens of millions of dollars daily. Main developer of its business-flow logic, author of many of its .NET microservices.
• Sole engineer, analysis to production, on the business-configurable rebilling decision platform (late 2025–2026): an event-driven engine on Azure Databricks, orchestrated across two clouds through the internal flow platform, Azure Queues and GCP Pub/Sub, letting business analysts tune revenue-recovery rules without engineering. Retired a 15-year-old system, handles 500,000+ biller notifications a day, is projected to add seven figures in annual revenue, and unlocked just-in-time billing-cycle optimization the business could not attempt before. Read the case study →
• Contributed to an internal fork of Node-RED with its backend rebuilt in .NET — editor kept, APIs reimplemented over a .NET runtime. It turned a prototyping tool into the orchestration platform running production payment workflows. Read the case study →
• Delivered five end-to-end integrations of major external payment systems, keeping the gateway biller-agnostic and configuration-driven.
• Designed and built the biller-aware reconciliation orchestrator (2024–2025), translating each payment system's heterogeneous notification feeds and protocols into the platform's own domain.
• Built the in-house rebilling engine (2023–2024), bringing subscription rebilling under company control instead of depending on external billers.
• Also built across the payments estate: the multi-region tax service (2023–present), GDPR-compliance business flows (2022–2023), and internal anti-fraud services on Microsoft Orleans with multi-region Cosmos DB (2020–2021).
• Interviewed and onboarded the team's recent hires; trained engineering teams in Romania and Canada on each new platform introduced.

C# / .NETMicrosoft OrleansgRPCTypeScriptAzure (AKS, Functions, Databricks, Cosmos DB, Queues)GCP (GKE, Pub/Sub, Firestore)KubernetesNode-REDGitLab CITerraform

Hand-picked senior task force rebuilding the backend of a high-traffic consumer web platform under heavy growth — owning the engineering foundations and the progressive, service-by-service rewrite onto .NET.

• Rewrote business-critical services from the legacy stack onto .NET and Temporal — deterministic, resumable workflows, so multi-step processes survive mid-flight failure instead of stranding state. Read the case study →
• Rebuilt a high-volume media processing pipeline end-to-end.
• Co-built the engineering foundations the rewrite ran on: repository consolidation, CI/CD, containerised deployment and a ground-up observability rollout.
• Half the legacy estate replaced with .NET over the engagement, with marked stability gains under production traffic.
• Fully AI-driven engineering process: BRD → RFC → implementation, custom agents, sub-agents and review prompts, frontier LLMs in daily use.

C# / .NETTemporalAWSKubernetesGitHub ActionsOpenTelemetry

Engagement via an intermediary on the platform supporting Romania's national vehicle-scrappage program ("RABLA"), a public-facing government system.

• Full-stack development of the citizen- and dealer-facing workflows, in .NET and Angular.

C# / .NETAngularSQL

Lead developer of a small team on a large-scale refactoring project for a national event-ticketing client; the project was halted in 2020.

• Ran requirements analysis directly with the client using domain-driven design, and architected the new system proposal.
• Overhauled the back-office admin panel using Angular and Umbraco.

C# / .NETAngularUmbracoDomain-Driven Design

Route-planning and logistics-optimization cloud services in .NET on Azure. After moving into consultancy in 2018, returned in 2019 at ORTEC's request to strengthen a key delivery team.

• Developed core routing software: distributed .NET microservices on Azure, exposed to clients through Web APIs.
• Main developer of the Map Service — Web APIs for time–distance matrix calculations between geopoints (wrapping a C++ Dijkstra implementation), map-tile display, route planning and geocoding, integrating HERE APIs.

C# / .NETASP.NET CoreAzureJenkinsAzure DevOpsOpenID Connect / OAuth 2.0

Full-stack consultancy work on enterprise web applications for international business clients.

• Built a greenfield admin platform for a tire-recycling client: .NET Core backend, Angular/PrimeNG frontend, Azure services (Functions, Logic Apps, Table Storage, ARM templates).
• Extended an identity management service on IdentityServer4, implementing OpenID Connect and OAuth 2.0 for the microservices of an enterprise system.

C# / .NET CoreAngular / PrimeNGAzureIdentityServer4