Integration Developer (.NET)

J4RVIS; Manila; On-site; PHP 1,000,000 - 1,600,000; Full time

Job summary

J4RVIS is seeking an experienced Integration Developer to own backend data movement between systems using .NET Web APIs, Azure Functions, and event-driven services. You’ll collaborate with clients, architects, and engineers across Australia and the Philippines to deliver scalable, reliable integrations.

You’ll design interfaces, implement robust error handling, and ensure security with modern standards while contributing to deployment pipelines and technical docs.

Qualifications

• 4–5+ years building production software in C# and .NET.
• Experience delivering system-to-system integrations.
• Strong communication and collaboration with clients, architects and engineers.

Responsibilities

• Build and maintain .NET Web APIs that integrate enterprise systems with versioning and error handling.
• Design and implement event-driven services on Azure Service Bus or similar broker.
• Develop, deploy, and tune Azure Functions for event-triggered processing.
• Translate integration requirements into interface contracts and non-functional specs.
• Create unit tests with xUnit to desired coverage; perform integration tests where needed.
• Build and maintain Azure DevOps pipelines across environments.
• Support testing, deployment, and hypercare after go-live.
• Contribute to estimates, SOWs, and technical documentation.
• Review teammates' code and uphold project standards.

Skills

C#

.NET

API design

REST

JSON

Async programming

Versioning

OAuth 2.0

JWT

TLS

Tools

Azure Functions

Azure Service Bus

Azure DevOps

xUnit

Production hosting

Job description

Integration Developer work at J4RVIS means you're not waiting for an architect to hand you a design. You'll shape the solution, make the technical calls and own the outcome across complex enterprise environments. We're looking for a .NET Integration Developer with strong C# and .NET experience who has delivered real system-to-system integrations and can point to their impact. You'll build APIs, Azure Functions, and event-driven services that are reliable, scalable, and built for production. You'll work closely with clients, architects, and engineers across Australia and the Philippines, so strong communication, proactivity, and the right attitude matter. If you're ready to move beyond execution and take real ownership, this is the role.

About J4RVIS

J4RVIS brings humans and technology together - for businesses built on relationships. We're a consulting business at our core, guiding enterprises through transformation by listening first, then building technology that makes people more capable, not redundant.

Since launching in 2020, we've grown to a team of 110+ people across Australia and the Philippines. We hold Salesforce Summit Partner status alongside partnerships with Anthropic, ElevenLabs, Snowflake, and AWS - spanning business systems, data and integration, conversational AI, and agentic automation. We've been recognised as a Deloitte Fast 50 "Rising Star", CRN Fast 50, and Great Place to Work in both countries. But the awards describe where we've been, not where we're going.

We go deep in the industries we serve: media, financial services, energy and utilities, because domain expertise is what makes the technology work. We measure success by three business outcomes: customer experience transformation, operational efficiency, and revenue generation. Not hours billed.

AI is central to what we do. We deploy Agentforce at scale, build conversational AI, and develop intelligent automation already running in production. Every team is augmented by AI, and every consultant is developing toward advisory, not just delivery.

We're on a growth spurt to further scale with an APAC expansion underway and a strategy that's locked in. If you want to be part of a firm that's building something that endures, where the culture is real and the ambition is high then this is an exciting time to join.

We're still early in our journey, and that's what makes this an exciting time to join.

Why This Role Exists

Our Data & Integration practice builds the layer that connects enterprise systems and makes data usable. Most of that work runs on MuleSoft today. Clients are increasingly asking us to build and integrate custom services on the Microsoft stack, and this role exists to meet that demand.

You will build .NET services that move data between systems: Web APIs, Azure Functions, and event-driven components that have to be correct under load and easy to operate at 2am. This is backend integration engineering. It is not front-end or full-stack product work, and the APIs you build are consumed by other systems rather than by a user interface.

You will work in a nearshore delivery team alongside architects and engineers in Australia and the Philippines, under one set of standards and one governance framework. The Philippines team is not a support function here. It delivers across every service line we run

What You'll Be Doing

• Build and maintain .NET Web APIs that integrate enterprise systems, including contract design, versioning, and error handling.
• Design and implement event-driven services on Azure Service Bus or a comparable broker: queues, topics, subscriptions, dead-letter handling, and retry strategy.
• Develop, deploy, and tune Azure Functions for event-triggered and scheduled processing.
• Turn integration requirements into technical designs, covering interface contracts, sequencing, failure modes, and non-functional requirements.
• Write unit tests in xUnit to an agreed coverage level, and integration tests where the risk warrants them.
• Build and maintain Azure DevOps pipelines for build, test, and deployment across environments.
• Support system testing, user acceptance testing, deployment, and the hypercare period after go-live.
• Contribute to estimates, statements of work, and technical documentation.
• Review your teammates' code and hold the team to a consistent standard.

What We're Looking For

At least 4-5 minimum years or more building production software in C# and .NET. We care much more about depth in the essentials below than about a long list of platforms.

Essential

• C#: strong working command of the language, including async and await, LINQ, dependency injection, and the task-based patterns that integration code lives on.
• .NET Web APIs on .NET 8 or later: REST, JSON, versioning, and API security using OAuth 2.0, JWT, and TLS. You can explain the choices you made, not only the code you wrote.

Strongly Preferred

• Azure Functions on .