Senior Technical Specialist
Austria
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Job Description
Senior Technical Specialist
Gemeindebezirk Liesing, Vienna

Job Summary

Full Stack Solution Architect – Legacy Modernization

We are looking for a hands-on Full Stack Solution Architect to lead the technical architecture of a legacy application modernization program, transforming applications built on C++, C#, .NET and Adabas into a modern Java/Spring Boot and React-based web platform.

Key Responsibilities

  • Assess legacy application architecture, code components, integrations, dependencies and Adabas data structures.
  • Define current-state and target-state solution architecture.
  • Define the modernization strategy covering rewrite, refactoring, replacement, retirement and coexistence.
  • Design Java/Spring Boot backend architecture and REST APIs.
  • Define React/TypeScript frontend architecture and reusable UI patterns.
  • Define integration, security, data migration and deployment architecture.
  • Establish architecture standards and engineering guidelines.
  • Lead technical design reviews and architecture workshops.
  • Guide Java, React, integration, data and DevOps engineering teams.
  • Identify technical risks and dependencies and recommend mitigation approaches.
  • Work closely with project management, business, engineering, security, infrastructure and operations teams.

Mandatory Skills

  • Strong enterprise Solution/Application Architecture experience
  • Application modernization / legacy transformation experience
  • Java and Spring Boot
  • REST API and integration architecture
  • React and modern web architecture
  • Database and data architecture
  • Security and non-functional architecture
  • CI/CD and DevOps concepts
  • Strong technical leadership and stakeholder communication

Strongly Preferred good to have

  • C++ and/or C#/.NET legacy modernization experience
  • Adabas knowledge or comparable legacy database modernization experience
  • Microservices / modular architecture
  • Docker / Kubernetes

 

Key Responsibilities

Full Stack Solution Architect – Legacy Modernization

We are looking for a hands-on Full Stack Solution Architect to lead the technical architecture of a legacy application modernization program, transforming applications built on C++, C#, .NET and Adabas into a modern Java/Spring Boot and React-based web platform.

Key Responsibilities

  • Assess legacy application architecture, code components, integrations, dependencies and Adabas data structures.
  • Define current-state and target-state solution architecture.
  • Define the modernization strategy covering rewrite, refactoring, replacement, retirement and coexistence.
  • Design Java/Spring Boot backend architecture and REST APIs.
  • Define React/TypeScript frontend architecture and reusable UI patterns.
  • Define integration, security, data migration and deployment architecture.
  • Establish architecture standards and engineering guidelines.
  • Lead technical design reviews and architecture workshops.
  • Guide Java, React, integration, data and DevOps engineering teams.
  • Identify technical risks and dependencies and recommend mitigation approaches.
  • Work closely with project management, business, engineering, security, infrastructure and operations teams.

Mandatory Skills

  • Strong enterprise Solution/Application Architecture experience
  • Application modernization / legacy transformation experience
  • Java and Spring Boot
  • REST API and integration architecture
  • React and modern web architecture
  • Database and data architecture
  • Security and non-functional architecture
  • CI/CD and DevOps concepts
  • Strong technical leadership and stakeholder communication

Strongly Preferred good to have

  • C++ and/or C#/.NET legacy modernization experience
  • Adabas knowledge or comparable legacy database modernization experience
  • Microservices / modular architecture
  • Docker / Kubernetes

 

Skill Requirements

Full Stack Solution Architect – Legacy Modernization

We are looking for a hands-on Full Stack Solution Architect to lead the technical architecture of a legacy application modernization program, transforming applications built on C++, C#, .NET and Adabas into a modern Java/Spring Boot and React-based web platform.

Key Responsibilities

  • Assess legacy application architecture, code components, integrations, dependencies and Adabas data structures.
  • Define current-state and target-state solution architecture.
  • Define the modernization strategy covering rewrite, refactoring, replacement, retirement and coexistence.
  • Design Java/Spring Boot backend architecture and REST APIs.
  • Define React/TypeScript frontend architecture and reusable UI patterns.
  • Define integration, security, data migration and deployment architecture.
  • Establish architecture standards and engineering guidelines.
  • Lead technical design reviews and architecture workshops.
  • Guide Java, React, integration, data and DevOps engineering teams.
  • Identify technical risks and dependencies and recommend mitigation approaches.
  • Work closely with project management, business, engineering, security, infrastructure and operations teams.

Mandatory Skills

  • Strong enterprise Solution/Application Architecture experience
  • Application modernization / legacy transformation experience
  • Java and Spring Boot
  • REST API and integration architecture
  • React and modern web architecture
  • Database and data architecture
  • Security and non-functional architecture
  • CI/CD and DevOps concepts
  • Strong technical leadership and stakeholder communication

Strongly Preferred good to have

  • C++ and/or C#/.NET legacy modernization experience
  • Adabas knowledge or comparable legacy database modernization experience
  • Microservices / modular architecture
  • Docker / Kubernetes

 

Other Requirements

Full Stack Solution Architect – Legacy Modernization

We are looking for a hands-on Full Stack Solution Architect to lead the technical architecture of a legacy application modernization program, transforming applications built on C++, C#, .NET and Adabas into a modern Java/Spring Boot and React-based web platform.

Key Responsibilities

  • Assess legacy application architecture, code components, integrations, dependencies and Adabas data structures.
  • Define current-state and target-state solution architecture.
  • Define the modernization strategy covering rewrite, refactoring, replacement, retirement and coexistence.
  • Design Java/Spring Boot backend architecture and REST APIs.
  • Define React/TypeScript frontend architecture and reusable UI patterns.
  • Define integration, security, data migration and deployment architecture.
  • Establish architecture standards and engineering guidelines.
  • Lead technical design reviews and architecture workshops.
  • Guide Java, React, integration, data and DevOps engineering teams.
  • Identify technical risks and dependencies and recommend mitigation approaches.
  • Work closely with project management, business, engineering, security, infrastructure and operations teams.

Mandatory Skills

  • Strong enterprise Solution/Application Architecture experience
  • Application modernization / legacy transformation experience
  • Java and Spring Boot
  • REST API and integration architecture
  • React and modern web architecture
  • Database and data architecture
  • Security and non-functional architecture
  • CI/CD and DevOps concepts
  • Strong technical leadership and stakeholder communication

Strongly Preferred good to have

  • C++ and/or C#/.NET legacy modernization experience
  • Adabas knowledge or comparable legacy database modernization experience
  • Microservices / modular architecture
  • Docker / Kubernetes

 
Apply now
Information at a Glance

Why HCLTech?

At HCLTech, you'll supercharge your potential. You'll find your career. And you'll find your spark. All at a place that knows that helping its customers stay on top starts by putting its people first.

HCLTech is a global technology company, home to more than 230,000 people across 60 countries, delivering industry-leading capabilities centered around digital, engineering, cloud and AI, powered by a broad portfolio of technology services and products. We work with clients across all major verticals, providing industry solutions for Financial Services, Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of 12 months ending September 2026 totaled $14.8 billion.