Senior Full Stack Developer (React + .NET)

C9; Manila; On-site; PHP 1,600,000 - 2,000,000; Full time

Job summary

C9 Pty in the Philippines is seeking a Senior Full Stack Developer to design, build and maintain scalable software within the C9 ecosystem. You will work in an Agile team delivering features with .NET (C#) and React, following Clean Architecture.

Remote-first with Australian business hours and distributed collaboration are essential. You will implement CQRS, manage relational databases, and contribute to CI/CD via Azure DevOps and Octopus Deploy, plus Terraform and Kubernetes for infra.

Qualifications

• 5+ years as a full stack software engineer using .NET (C#) and React
• Proven experience with CQRS and Clean Architecture
• Strong background in relational databases (SQL Server, MySQL, PostgreSQL)
• Hands-on experience building and supporting production systems
• Experience in Agile/Scrum environments and modern dev workflows

Responsibilities

• Develop and maintain C# backend and React frontend components
• Implement CQRS and Clean Architecture principles
• Collaborate with cross-functional teams to design and ship features
• Manage CI/CD pipelines using Azure DevOps and Octopus Deploy
• Provision and manage infrastructure with Terraform and Kubernetes
• Troubleshoot and optimise existing systems
• Contribute to architectural discussions and code reviews

Skills

React

NET C#

CQRS

SQL Databases

Agile/Scrum

Git/Jira

Remote collaboration

Tools

Azure DevOps

Octopus Deploy

Terraform

Kubernetes

Job description

Senior Full Stack Developer (React + .NET)

Location: Cebu or Manila, Philippines (Remote-first, aligned to Australian business hours – AEST)

Employment Type: Project Based

The Role

The Full Stack Developer will be responsible for designing, developing, and maintaining high-quality software solutions within the C9 ecosystem. You will work within an Agile scrum team to deliver robust, scalable features using the .NET and React stack, ensuring alignment with our Clean Architecture standards.

Responsibilities

• Develop and maintain efficient, reusable, and reliable C# code and React components.
• Implement Clean Architecture with CQRS and ensure high code quality.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Manage CI/CD pipelines using Azure DevOps and Octopus Deploy.
• Infrastructure provisioning and management using Terraform and Kubernetes.
• Troubleshoot, debug, and upgrade existing software systems.
• Contribute to architectural discussions and code reviews to maintain high standards.

What We're Looking For

• 5+ years of experience as a full stack software engineer using .NET (C#) and React .
• Strong practical understanding of:
• CQRS
• Proven experience working with relational databases (SQL Server, MySQL, PostgreSQL).
• Hands-on experience building and supporting production systems.

Project & Delivery Skills

• Experience working in Agile/Scrum delivery environments.
• Familiarity with Git, Jira (or equivalent), and modern development workflows.
• Comfortable working remotely with distributed teams while remaining accountable for outcomes.
• Strong debugging, performance optimisation, and problem-solving capability.
• Proactive, self-directed, and delivery-focused.
• Strong attention to detail with a pragmatic approach under pressure.
• Able to explain technical decisions clearly to teammates and non-technical stakeholders.
• Enjoys working in collaborative, outcome-oriented engineering teams

Bonus (Nice to Have)

• Experience in consulting or multi-client delivery environments.
• Exposure to:
• Azure DevOps advanced pipelines
• Integration-heavy or API-first systems
• Prior experience working with Australian or international clients.

Why Join C9

• You'll work on real, complex technical problems – not low-value admin delivery.
• Heavy exposure to modern cloud, integration, data, and automation projects.
• A delivery culture that values technical credibility in project leadership.
• Remote-first setup with strong es to Australian enterprise and government clients.
• Opportunity to grow into senior delivery leadership roles as C9 scales.

Working Arrangements

Remote; must be available during Australian Business Hours (AEST). Tools and equipment provided per company policy.

Remuneration & Incentives

• Remuneration and incentives commensurate with experience.

Note:

Our interview process includes a mandatory live video checkpoint to verify your physical location. Candidates must be permanently based and interviewing in the Philippines to ensure compliance with regional labor regulations.