Lead Software Engineer (.NET)

About us

Mantel is an Australian-owned IT Professional Services consultancy, focused on emerging technology to help advance our clients by leveraging AI, Digital, Cloud, Data & Security technology. We are a fully AI-enabled technology consultancy and the partner that bridges the gap between blue-sky ambition and practical steps to deliver value. Since our inception in November 2017, we have experienced remarkable growth across Australia & New Zealand and are honoured to be recognised as a Great Place to Work for 6 years in a row!

We hire smart and talented people and get out of their way. As a principle-based organisation, we have a flat structure with no hierarchy. By focusing on our five principles and not getting caught up in red tape, we trust you to get the job done!

Our Digital team works collaboratively to develop end-to-end digital solutions, ranging from technology selection to building and operating phases. Spanning both software and hardware deployments, we deliver and manage scalable, cloud-focused, automated solutions - focused on shared knowledge, continuous improvement and design thinking.

About the role:

As a Lead Software Engineer, you will enjoy working on a diverse and exciting range of projects across various clients and industries. We are a technology agnostic business which opens endless possibilities for you to work across multiple tech stacks and multiple platforms with the opportunity to upskill and cross skill in the following:

• API Development - Java, Kotlin, Golang, Node.js, Kafka and GraphQL

• Integration Technologies - Apigee, Kong

• Multi Cloud Platforms - AWS, GCP, Azure

We will always evolve as the technology landscape changes so we both won’t be left behind!

We love our tech-agnostic culture. For this role, we want someone with deep expertise specifically in .NET, with the agility to adapt across different stacks.

Above all, your consulting skills are the top priority. Technical skills get you to the table, but your ability to advise clients, solve complex business problems, and communicate effectively is what will drive your success here.

Your day to day:

• Thrive in our collaborative, flat-structured environment, where your day-to-day work is all about teamwork and shared decision-making

• Lead and mentor team members to become the next generation of leaders and software professionals

• Implement technology solutions that meet and exceed customer requirements and expectations

• Develop high quality code that can function with existing code, patterns and architectural techniques

• Provide clarification of technical requirements and the translation of these requirements into technical design

• Monitor and assess industry developments and incorporate them into solutions where appropriate

• Champion the adoption and evolution of AI-assisted development tools across teams and projects

• Design and implement team-wide agentic coding workflows (setup-plan-act) that integrate with existing development practices

• Establish team standards for shared context management, prompt libraries and reusable agentic patterns

• Mentor engineers at all levels on effective AI-human collaboration in software development

• Effectively utilise development best practices such as CI/CD

• Actively participate in team agile development practices

• Ensure appropriate quality is maintained through practices such as unit testing and shifting quality left

• Design systems that can be deployed and managed effectively in a production environment.

• Use professional judgement while treating colleagues and clients with respect and compassion, and a demonstrated ability to display our five Mantel principles

What you’ll need to be successful:

• Expertise in modern API technologies & microservices, in order to architect and develop solutions on both greenfield projects and existing applications

• Strong technical and team leadership experience, having led the technical direction on both projects and software engineering teams

• The ability to code in .NET and have a willingness to learn new languages

• Experience building and maintaining cloud based applications - AWS / GCP / Azure

• Experience with agentic coding tools and ability to lead team adoption

• Experience architecting development workflows that integrate AI assistance with human expertise

• Understanding of AI code generation security and quality assurance frameworks

• Proven experience establishing team ways of working with agentic tools, including:

  • Shared context repositories and knowledge management

  • Prompt engineering standards and libraries

• You are passionate about software development best practices such as CI/CD

• A self-starter mindset and an ability to work hands-on, to find answers and work with ambiguity

• Values driven and practical in your approach

• At Mantel, we want you to be yourself. We trust our team members to use their professional judgment while treating colleagues and clients with respect, compassion, and professionalism in alignment with our five principles.

• You take ownership, always stepping up to help and prioritising your teammates. You're also a clear, kind communicator who makes sound decisions based on good judgement.

What you can expect from us:

• We believe in unique experiences for all. Our My Deal program allows you to tailor your yearly plan, with the support of your Leader, to decide on what’s most important to you. That might be extra professional development, extra annual leave, time to work on your side hustle, or something else completely different! One size does not fit all.

• You’ll get all the tools you need to hit the ground running including a new phone, laptop & swag.

• A true investment in your AI-first career. We are a fully AI-enabled consultancy and provide you with the tools to lead. This includes access to the Mantel AI Gateway, our secure, centralised platform with multiple AI models, plus a dedicated monthly budget and a safe environment to experiment and innovate.

• You’ll be genuinely supported by an organisation that cares about not only you but your family as well, Mantel offers Flexible Personal Leave options for those unplanned moments in life.

• We support a flexible hybrid approach to working which is guided by our principles; we trust each other to “make good choices” about the best workplace locations for the requirements of the project, role and client. This can change based on our client needs.

• We know you won’t have one job for life. At Mantel, we believe in supporting our team to take their career in a direction that aligns with their passions. We have internal opportunities across Cloud, Data, Digital, Delivery & Security.

• Our elite partnerships are a direct result of our deep platform mastery. For you, this means you'll be working alongside teams with the highest levels of technical expertise and tackling the most complex, high-profile projects on the market. Check out our partner awards and recognitions here.

• Mantel is a certified Family Inclusive Workplace, which means we are committed to improving your wellbeing at work through leading practices on flexible work, parental leave, family care and family wellbeing

We value a diverse workplace and strongly encourage people from all backgrounds and minority groups to apply.