typescript

#резюме #nodejs #nestjs #typescript #backend #fintech #remote 👨‍💻 Position: Backend Engineer · Node.js / TypeScript (NestJS) 💼 Experience: 4 years in backend development 💻 Work format: remote (B2B contract, registered sole proprietor in Armenia), office or hybrid in Yerevan; open to discussing relocation ⏱️ Employment: full-time, contract 💰 Salary expectation: from 2,500 USD/month 🚀 Availability: can start immediately 📍 Location: Yerevan, Armenia (UTC+4) 📨 Contact: @suren_sim · linkedin.com/in/suren-simonyan 📄 CV: on request ABOUT ME ══════════════════════════════════ Backend engineer with 4 years of experience specializing in Node.js, TypeScript, and NestJS, building payment workflows, multi-tenant SaaS platforms, and iGaming backends. Additional commercial C#/.NET experience on a multi-service ABP platform and its integrations. KEY EXPERIENCE ══════════════════════════════════ Paydan — Multi-tenant fintech SaaS platform • Designed and built the NestJS/PostgreSQL backend: Clean Architecture, tenant isolation, per-tenant configuration, deployed on Azure • Integrated the NMI payment gateway with transaction idempotency and an extensible gateway interface • POS business logic, inventory sync, reconciliation; BullMQ background jobs, tenant-level rate limiting, structured logging (Pino) • Onboarded two mid-level developers, broke down the backlog, reviewed their PRs SitePlant — construction-asset management SaaS platform (C# / .NET, ABP) • Features and fixes across a 9-service backend (EF Core, SQL Server), Flespi telematics integration, REST APIs for web and mobile clients Sportsbook MVP — Real-time betting system • Single and parlay bet processing and settlement: outcomes, ledger records and balance updates in MongoDB transactions • Idempotent payout jobs with MongoDB change streams and BullMQ Transit Ticketing Platform — Cashless fare collection for city transport • NestJS/PostgreSQL backend integrating IoT terminals: transport cards, QR, bank cards • Idempotency, retry handling, RBAC, Redis caching, OpenAPI docs TECHNICAL SKILLS ══════════════════════════════════ Languages: TypeScript, JavaScript (Node.js), C# Backend Frameworks: NestJS, Express.js · ASP.NET Core, ABP Framework Databases & Data Access: PostgreSQL, MongoDB, Redis, SQL Server · TypeORM, Prisma, Entity Framework Core Architecture: Clean Architecture, Domain-Driven Design (DDD), multi-tenancy, microservices, event-driven design Messaging & Queues: BullMQ, RabbitMQ Cloud & DevOps: Azure, AWS, Docker, GitHub Actions, GitLab CI Observability: OpenTelemetry, Prometheus, Grafana, Pino AI-Assisted Development: Claude Code, OpenAI Codex Domain Expertise: payment gateways, idempotent transactions, settlement and reconciliation, multi-tenant SaaS, sportsbook betting engines, IoT payment terminals LANGUAGES ══════════════════════════════════ English (B2), Russian (B1)