freiberufler Senior .NET / Full stack Software Engineer / Lead Developer auf freelance.de

Senior .NET / Full stack Software Engineer / Lead Developer

online
  • 50€/Stunde
  • 013907 Bucharest
  • Europa
  • ro  |  en
  • 19.06.2026
  • Contract ready

Kurzvorstellung

Senior Software Engineer with 20 years of hands-on experience building scalable backend systems, REST APIs, and cloud-native microservices using C# and .NET. Strong believer in continuous improvement - always received great feedback from clients.

Geschäftsdaten

 Freiberuflich
 Steuernummer bekannt
 Berufshaftpflichtversicherung aktiv

Qualifikationen

  • ASP.NET6 J.
  • C#19 J.
  • Entity Framework
  • Google Cloud6 J.
  • Graphql
  • JavaScript
  • Microsoft SharePoint Server
  • Postgresql3 J.
  • Software Architecture9 J.
  • SQL13 J.

Projekt‐ & Berufserfahrung

Senior .NET Engineer
Merkle DACH, Geneva
11/2022 – 4/2026 (3 Jahre, 6 Monate)
IT & Entwicklung
Tätigkeitszeitraum

11/2022 – 4/2026

Tätigkeitsbeschreibung

At Merkle DACH, I work as a Senior .NET Developer on backend systems supporting Philip Morris Switzerland’s acquisition and customer management platforms. My focus is on building high-quality, scalable REST APIs, improving existing architectures, and implementing modern engineering practices in a cloud-enabled environment.

Key Responsibilities:
Develop and maintain backend REST APIs used by acquisition and CRM systems.
Implement new functionalities and integrations while ensuring high performance and reliability.
Contribute to the migration from a monolithic system to a microservices-based architecture.
Refactor and optimize existing code to improve maintainability, performance, and adherence to clean architecture principles.
Implement cross-cutting concerns such as logging, metrics, and tracing using OpenTelemetry.
Collaborate closely with other backend, frontend, and DevOps engineers to ensure smooth delivery and integration.
Participate in code reviews, debugging, and performance optimization activities.

Eingesetzte Qualifikationen

Amazon Web Services (AWS), C#, Postgresql, SQL

Senior .NET Engineer
Computas Development Center, Bucharest
3/2016 – 9/2022 (6 Jahre, 7 Monate)
IT & Entwicklung
Tätigkeitszeitraum

3/2016 – 9/2022

Tätigkeitsbeschreibung

During more than six years at Computas, I worked on multiple large-scale projects across industries including insurance, energy, and internal automation. My focus was on designing and developing backend systems, integrating cloud services (Google Cloud and Azure), and building clean, maintainable software architectures.

Key Responsibilities:
Designed and implemented RESTful APIs using .NET Core for enterprise-grade applications.
Contributed to architecture design, scalability, and deployment strategies for both cloud and on-premises solutions.
Delivered cloud-native integrations leveraging GCP AutoML, Cloud Scheduler, Cloud Run, and Azure App Services.
Ensured code quality and reliability through best practices, peer reviews, and mentoring of junior developers.
Collaborated closely with Norwegian product teams using Agile methodologies (Scrum / Kanban).
Implemented secure authentication and authorization mechanisms with Identity Server and OAuth 2.0.
Acted as technical advisor on multiple proof-of-concept and R&D initiatives.

Eingesetzte Qualifikationen

ASP.NET, C#, Google Cloud

Senior Software Engineer / Technical Architect
Star Storage, Bucharest
9/2006 – 3/2016 (9 Jahre, 7 Monate)
IT & Entwicklung
Tätigkeitszeitraum

9/2006 – 3/2016

Tätigkeitsbeschreibung

Over nearly ten years at Star Storage, I advanced from developer to product architect, contributing to and leading numerous large-scale enterprise software projects. I designed and implemented desktop, web, and mobile solutions focused on document management, content processing, and digital transformation. My work combined deep technical development in .NET and SharePoint with architectural design and product leadership responsibilities.

Key Responsibilities:
Designed, developed, and maintained enterprise applications using C#, .NET, WPF, Silverlight, and SharePoint.
Defined software architectures for client and internal solutions, ensuring scalability, reliability, and clean design.
Collaborated with cross-functional teams to deliver document management, OCR, and workflow automation systems.
Led development teams, reviewed code, and mentored junior engineers.
Integrated third-party APIs and tools such as GhostScript, OCR/ICR engines, and digital signature frameworks.
Delivered custom solutions for major enterprises in the banking and public sectors.

Eingesetzte Qualifikationen

C#, Software Architecture, SQL

Zertifikate

Azure Solutions Architect Expert
Microsoft
2021
Google Cloud Architect
Google
2020
Universal Windows Platform
Microsoft
2015
Microsoft Certified Professional
Microsoft
2012
Microsoft Specialist: Programming in C#
Microsoft
2011

Ausbildung

Bucharest Academy of Economic Studies
MSc, Computerized Project Management
2009
Bukarest
University Politehnica of Bucharest
BEng, Computer Science
2007
Bukarest

Über mich

I’m a Senior Software Engineer with 20 years of experience developing software solutions that make a real impact, from desktop and mobile applications, enterprise content management, web portals and web APIs to cloud solutions, in a variety of industries: insurance, banking, telecom, public sector, and smoke-free products industries.

Weitere Kenntnisse

Most of my work has been centered around C# and .NET, where I’ve built and optimized backend systems, designed clean and scalable architectures, and integrated cloud services on Azure, AWS, and GCP. I love working on projects that challenge me to think deeply about performance, reliability, and maintainability.

Over the years, I’ve moved naturally toward software architecture and cloud engineering, focusing on creating future-proof and well-structured solutions that are easy to evolve. I take pride in writing code that’s not only functional but also elegant and easy to understand.
I’m a strong believer in continuous improvement — I constantly read technical books, explore new tools, and learn from other engineers. I’ve always received great feedback from clients and teammates for being dedicated to project goals, team player, dependable, and easy to collaborate with. I genuinely care about doing things right and helping those around me grow as well.

Persönliche Daten

Sprache
  • Rumänisch (Muttersprache)
  • Englisch (Fließend)
Reisebereitschaft
Europa
Arbeitserlaubnis
  • Europäische Union
Home-Office
bevorzugt
Profilaufrufe
39
Alter
43
Berufserfahrung
19 Jahre und 5 Monate (seit 01/2007)

Kontaktdaten

Nur registrierte PREMIUM-Mitglieder von freelance.de können Kontaktdaten einsehen.

Jetzt Mitglied werden