Software Developer

Remote Software Developer (Contractor)

Centrex Technologies is an international corporation specializing in the development of advanced laundry software and RFID technologies to improve linen management for hospitals, hotels and commercial laundries.

We are seeking an experienced, independent Software Developer based in the Philippines

(or Asia-Pacific region) to support and enhance our enterprise-grade RFID tracking and cloud platform, Linenweb

,

This is an independent contractor position

(invoicing model) with fully remote flexibility.

You must have excellent written and spoken English and at least 5 years software development experience using Dotnet and SQL. Experience in AI and RFID would be an advantage.

About the Role

We are seeking an experienced Software Developer to join our team, working on enterprise-grade applications supporting RFID-based tracking systems, cloud-integrated platforms, and high-availability infrastructure.

You will play a key role in developing, maintaining, and enhancing our core systems, working closely with senior developers and infrastructure teams across multiple regions. The role will primarily focus on supporting and improving our existing Linenweb platform, with a secondary focus on developing an AI assistant to help customers use Linenweb. Future phases will extend into secure AI-driven reporting and data queries.

Main Duties and Responsibilities

• Develop and maintain C#/.NET and ASP.NET Core services for the Linenweb AI platform.
• Work with SQL Server and existing Linenweb data structures.
• Test, troubleshoot and document all development work.
• Identify and report technical problems, risks or blockers promptly.
• Integrate AI/LLM services, REST APIs and internal Linenweb systems securely.
• Use Azure DevOps and Git for work items, branches, pull requests, code reviews and deployments.

Required Technical Skills & Experience

• Good written and spoken English is essential. Applicants must be able to clearly explain technical issues, document work and communicate effectively with Centrex management and team members.
• 5+ years’ experience in software development (full-time)
• Strong experience with C# / .NET Framework / .NET Core
• Solid experience with Microsoft SQL Server (queries, performance tuning, stored procedures)
• Experience working with Windows Server environments and IIS
• Experience building and consuming REST APIs
• Understanding of version control systems (e.g. Git, Azure DevOps)
• Strong debugging and problem-solving skills
• Test work properly, follow the agreed review/deployment process and maintain confidentiality

Desirable Skills and experience

• Experience with Android application development
• Experience with DevOps practices (CI/CD pipelines, deployments)
• Experience with cloud platforms (Azure or AWS)
• Knowledge of C++ / low-level integrations (for hardware/RFID interaction)
• Familiarity with RFID technologies or IoT systems
• Experience working in high-availability / load-balanced environments
• Strong C#/.NET and ASP.NET Core development skills.
• Experience developing and consuming REST APIs.
• Good SQL Server / T-SQL knowledge.
• Experience with Git and a structured development workflow such as Azure DevOps.
• Experience integrating OpenAI or other Large Language Model (LLM) APIs.
• Knowledge of AI assistants, prompt design, RAG/vector search or similar AI application concepts.
• Good understanding of testing, debugging, software security and maintainable coding practices.
• Experience with Linux, Docker, Nginx, CI/CD, Azure or Kubernetes.

Nice-to-Have (Highly Valued Experience)

• Hands-on experience with RFID systems (e.g. Impinj, handheld scanners, portals)
• Experience supporting production systems in regulated environments (e.g. healthcare)
• Exposure to security-focused development (authentication, APIs, data protection)

Qualifications

• Bachelor’s degree or higher in computer science, Software Engineering, or related field
• Relevant Microsoft, Azure, .NET, AI or cloud certifications are desirable but not essential.

Additional Skills

• Strong written and verbal communication skills (English)
• Ability to work independently in a remote environment
• Highly organised with strong attention to detail
• Ability to meet deadlines and manage multiple priorities
• Additional languages (Arabic or Hindi) are advantageous

Security Requirements The developer must follow Centrex security requirements, including least-privilege access, separation of development/test/production, secure handling of credentials and customer data, and no unapproved production changes.

Must maintain confidentiality

Why Join Us

• Work on real-world, large-scale enterprise systems
• Exposure to RFID, IoT, and cloud-integrated platforms
• Flexible remote working environment
• Opportunity to contribute to high-impact projects across healthcare and logistics sectors

📩 How to Apply:

If you meet the requirements and are available for contract engagement, please submit your CV/resume showcasing your relevant C#/.NET and AI API integration experience to kathyma@ctrx.com