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Hi, I’m Andrei Florin Valeanu, a backend engineer focused on building scalable, secure systems for fintech and healthcare. I enjoy tackling complex, multi-tenant architectures, delivering robust APIs, and collaborating with cross-functional teams to drive product value. My toolkit centers on Node.js, NestJS, Express, and TypeScript, with deep experience in PostgreSQL, MongoDB, Redis, Kafka, Docker, Kubernetes, and cloud platforms like AWS and GCP. I thrive in fast-paced environments and love turning tough problems into clean, maintainable solutions.…Hi, I’m Andrei Florin Valeanu, a backend engineer focused on building scalable, secure systems for fintech and healthcare. I enjoy tackling complex, multi-tenant architectures, delivering robust APIs, and collaborating with cross-functional teams to drive product value. My toolkit centers on Node.js, NestJS, Express, and TypeScript, with deep experience in PostgreSQL, MongoDB, Redis, Kafka, Docker, Kubernetes, and cloud platforms like AWS and GCP. I thrive in fast-paced environments and love turning tough problems into clean, maintainable solutions.

andreiflorin

Back-End Developer, Full Stack Developer, App Developer, +4

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Hi, I’m Andrei Florin Valeanu, a backend engineer focused on building scalable, secure systems for fintech and healthcare. I enjoy tackling complex, multi-tenant architectures, delivering robust APIs, and collaborating with cross-functional teams to drive product value. My toolkit centers on Node.js, NestJS, Express, and TypeScript, with deep experience in PostgreSQL, MongoDB, Redis, Kafka, Docker, Kubernetes, and cloud platforms like AWS and GCP. I thrive in fast-paced environments and love turning tough problems into clean, maintainable solutions.…Hi, I’m Andrei Florin Valeanu, a backend engineer focused on building scalable, secure systems for fintech and healthcare. I enjoy tackling complex, multi-tenant architectures, delivering robust APIs, and collaborating with cross-functional teams to drive product value. My toolkit centers on Node.js, NestJS, Express, and TypeScript, with deep experience in PostgreSQL, MongoDB, Redis, Kafka, Docker, Kubernetes, and cloud platforms like AWS and GCP. I thrive in fast-paced environments and love turning tough problems into clean, maintainable solutions.

Available to hire

Hi, I’m Andrei Florin Valeanu, a backend engineer focused on building scalable, secure systems for fintech and healthcare. I enjoy tackling complex, multi-tenant architectures, delivering robust APIs, and collaborating with cross-functional teams to drive product value.

My toolkit centers on Node.js, NestJS, Express, and TypeScript, with deep experience in PostgreSQL, MongoDB, Redis, Kafka, Docker, Kubernetes, and cloud platforms like AWS and GCP. I thrive in fast-paced environments and love turning tough problems into clean, maintainable solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Romanian, Moldavian, Moldovan

Fluent

English

Advanced

Work Experience

Senior Backend Engineer at Aire Logic

February 1, 2024 - February 1, 2026

Leading backend engineering for cloud-native microservices; designed scalable architecture using AWS, Node.js/Express.js, and TypeScript; implemented domain-driven design, multi-tenant RBAC, and secure authentication using OAuth2/OpenID Connect (Auth0/Passport.js). Built robust CI/CD pipelines, Docker-based deployments, and Kubernetes orchestration. Implemented real-time observability with Sentry and OpenTelemetry, optimized data pipelines, and ensured HIPAA/PCI-DSS-aligned security practices across health data integrations.

Senior Backend Engineer at PecunPay

November 1, 2021 - January 31, 2024

Led backend development for a fintech SaaS platform in Madrid; applied domain-driven design to align product and technical domains, built RESTful and gRPC APIs, and managed multi-tenant data models with strong security controls (RBAC, JWT). Implemented secure authentication flows (OAuth2, OpenID Connect), and integrated key components (Passport.js) with compliance considerations for HIPAA/PCI-DSS. Focused on performance optimization, event-driven architecture, and scalable data storage.

Backend Developer at Wolfpack Digital

August 1, 2018 - October 31, 2021

Architected and implemented backend for multi-tenant SaaS projects in Cluj-Napoca; designed flexible schemas with MongoDB and TypeORM for large clinical and enterprise datasets; built robust API layers using Node.js/Express and NestJS; contributed to continuous delivery, testing, and modernization of legacy systems.

Back End Developer at Bit Stone

October 1, 2016 - July 31, 2018

Owned backend for B2B SaaS products in Cluj; architected multi-tenant data models with MongoDB and TypeORM; developed scalable API endpoints, shopping/cart features, and admin interfaces; implemented secure authentication with Passport.js and JWT; streamlined deployment pipelines and ensured data integrity.