Osoian
Marcel

Software Engineer

CV

Profile

Software Engineer with over 10 years of experience building web systems and APIs. Strong background in Node.js, TypeScript, and cloud-native development using Kubernetes. Built and maintained distributed microservices, integrated third-party APIs, and designed scalable backend systems. 4 years of hands-on experience with Ethereum blockchain, smart contracts, and Web3 tools. Comfortable working across the stack and handling infrastructure when needed.

Experience

Tech Lead
TravelBusinessClass
Feb 2023May 2025
  • Led the architecture and development of a high-performance flight search engine with sub-7s response times.
  • Built horizontally scalable microservices architecture on Kubernetes, ready for high traffic loads.
  • Introduced and led the migration to Kubernetes, replacing a monolithic system.
  • Implemented CI/CD with ArgoCD and integrated telemetry stack (Prometheus, Loki, Grafana, Jaeger).
  • Integrated Sabre API and other flight data providers to support parallel search and booking.
  • Developed and documented RESTful APIs using Swagger.
  • Managed a team of 4 developers, including mentoring and workflow organization.
  • Conducted technical interviews for backend and DevOps roles.
  • Collaborated with external support teams to resolve integration issues.
  • Wrote clear technical specifications and task breakdowns for development.
Node.jsTypeScriptNest.jsMongoDBPostgresRedisKubernetesHelmSabre APISwagger
Full-stack Web Engineer
DMEX.app
Mar 2018July 2023
  • Architected and developed the back end of three Ethereum-based decentralized applications: - ethermium.com - decentralized spot exchange - dmex.app - decentralized margin trading platform - criptoleu.com - national cryptocurrency and payment system.
  • Designed and implemented APIs, including full documentation.
  • Built a custom order matching engine and integrated smart contracts into the back end.
  • Managed server infrastructure: web servers, databases, Ethereum nodes.
  • Implemented horizontal scaling, optimized Node.js performance, and integrated Prometheus + Grafana monitoring.
  • Contributed to front-end development using Vue.js and Vuex.
JavaScriptNode.jsExpressSocket.IOSequelizeSolidityWeb3GethOpenEthereumVue.js
Co-Owner & Full-stack Web Engineer
Devify.net
Jun 2016Mar 2018
  • Managed company operations including hiring, project planning, and client delivery.
  • Developed the front-end and back office for BtcXChange.ro, implementing new features and UI improvements.
  • Continued development and server maintenance of Avigo.md.
  • Acted as Tech Lead on multiple client projects, overseeing architecture and team development.
PHPMySQLHTML5CSS3JavaScriptDevOpsDockerYouTrack
Full-stack Web Engineer
Avigo.md
Oct 2014Jun 2016
  • Served as the lead software engineer, responsible for building the initial version of Avigo.md.
  • Developed a complete flight search engine, booking flow, and integrated payment system.
  • Built a full-featured back office for sales tracking, reporting, and management.
  • Created a custom library to parse booking outputs from various flight systems, streamlining the ticketing process and improving operational efficiency.
PHPMySQLHTML5CSS3JavaScriptSymfonyDoctrineDevOpsSEO
Full-stack Developer & Hardware Engineer
Myvic Inc
Jul 2013Oct 2014
  • Developed a wholesale e-commerce platform using ExtJS (SPA), including custom features tailored to individual clients.
  • Built and programmed a hardware device to monitor industrial machine activity.
  • Contributed to the development of a cross-platform mobile app for real-time machine status visualization and reporting.
JavaScriptPHPMySQLPythonWebsocketExtJS & TouchDevOpsRaspberry PI

Education

Civil Law
Technical University of Moldova
20092013
  • Although I pursued a degree in law, my passion for technology started at a young age. I began learning programming early on and continued developing my skills throughout university. After graduation, I decided to follow my true passion and transition into a career in software engineering.