Senior Software Architect for Mission-Critical Systems

NEWTONE SERVICES PTE. LTD.; Singapore; On-site; SGD 180,000 - 260,000; Full time

Job summary

NEWTONE SERVICES PTE. LTD. is seeking an experienced Software Architect to lead the end-to-end architecture of mission-critical systems.

The role blends solution architecture, hands-on engineering, system integration, security, and technical leadership across development teams and partners. You will own architecture across applications, data, networking, and security, drive improvements for performance and resilience, and guide pre-sales and testing activities.

Qualifications

• Degree in Computer Science, Software Engineering, or related discipline.
• 8+ years of software/system engineering experience, including 3+ years in an architecture role.
• Proven experience architecting and delivering complex systems end-to-end.
• Strong hands-on development and debugging experience with Java, C#/.NET, C++, Python, or similar technologies.
• Strong knowledge of APIs, messaging, system integration, Linux/Windows, containers/virtualization, and networking.
• Good understanding of high availability, performance, cybersecurity, and secure system architecture.
• Experience in government, defence, CII, or other mission-critical environments is highly advantageous.
• Strong communication skills with the ability to engage customers, management, developers, and vendors.

Responsibilities

• Own end-to-end software and system architecture across applications, middleware, data, networking, and security.
• Assess existing architectures and drive improvements in performance, scalability, resilience, and security.
• Lead integration of complex subsystems, APIs, messaging platforms, sensors, and third-party solutions.
• Act as the senior technical escalation point and define high availability, redundancy, and failover strategies.
• Provide hands-on technical support during integration, testing, FAT/SAT, and production implementation.
• Lead design and code reviews and establish software engineering and CI/CD standards.
• Embed security-by-design principles and support hardening, VA/PT remediation, and security accreditation.
• Support solutioning, technical proposals, architecture presentations, and effort estimation during pre-sales.

Skills

Software architecture

Java

C#/.NET

C++

Python

APIs

Messaging

Linux/Windows

Containers/virtualization

Security

Communication

Education

Degree in Computer Science/Software Engineering

Tools

CI/CD

Job description

NEWTONE SERVICES PTE. LTD. is seeking an experienced Software Architect to lead the end-to-end architecture of mission-critical systems.

The role blends solution architecture, hands-on engineering, system integration, security, and technical leadership across development teams and partners. You will own architecture across applications, data, networking, and security, drive improvements for performance and resilience, and guide pre-sales and testing activities.