Job Description
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We are looking for a Principal Full-Stack Engineer (C# / React / AWS) to shape the future of our web, mobile, and API platforms. This is a senior technical leadership role responsible for setting development standards, driving innovation, and ensuring delivery of scalable, high-quality solutions across web, mobile, and API platforms. This role requires hands‐on coding expertise, cross-team collaboration, and the ability to mentor and guide developers across multiple projects and technologies.
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Set technical direction across front-end, back-end, mobile, and cloud.
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Design scalable APIs and data solutions using MySQL, SQL Server, Redis, and OpenSearch.
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Shape and evolve containerised and serverless workloads (Docker, AWS ECS, Lambda).
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Ensure performance, reliability, security, and clean engineering practices.
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Guide teams using frameworks such as React, Next.js, Vue, C#, .NET, and modern CI/CD pipelines.
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Support native and cross-platform mobile teams through stable, well-versioned APIs.
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Integrate AI-assisted capabilities where useful (e.g., search relevance, summarisation, assistants).
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Collaborate across the businessn
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Work closely with product, UX, QA, mobile, DevOps, and analytics teams to deliver cohesive experiences.
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Influence architecture, data models, API contracts, and system design decisions.
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Ensure consistent instrumentation and analytics across platforms (GA4, GTM).
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Mentor & grow the engineering teamn
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Coach developers through code reviews, pairing, and knowledge-sharing.
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Champion best practices in coding, testing, observability,



and continuous improvement.
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Foster a culture of innovation and responsible use of AI tooling.
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Deliver with impactn
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Balance hands‐on coding with technical leadership.
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Provide visibility on progress, risks, and dependencies across systems.
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Ensure high-quality releases with strong testing, monitoring, and performance outcomes.
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Data & Storage:
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Relational databases
: MySQL and SQL Server – schema design, indexing, query optimisation, migration strategies.
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Caching:
Redis (or compatible) for session, configuration, and application data.
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Files/objects in S3 or equivalent.
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Search:
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OpenSearch/Elasticsearch
– index design, analysers, relevance tuning, and query optimisation.
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AWS
(core services including Lambda, ECS, S3, API Gateway, RDS).
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Docker-based development and deployment workflows.
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Terraform and CI/CD pipelines, infrastructure-as-code.
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Demonstrated ability to innovate, simplify, and deliver impactful solutions at scale.
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Additional experience (beneficial, not essential)n
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Supporting or integrating with iOS and Android applications, including authentication flows, rate limiting, and feature toggling.
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Instrumentation of web and mobile apps using GA4 and GTM:
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Event and conversion tracking
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Tagging strategies and dataLayer best practices
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Using analytics to guide product decisions
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Working with AI-powered features such as relevance tuning, classification, summarisation, or content generation.
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Designing and iterating on prompts
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Evaluating output quality and safety
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Integrating AI services into APIs and workflows
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Solid architectural and systems design skills.
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Experience with Agile/Scrum environments.
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Technical Expertise
– across modern frameworks, cloud-native architectures,
serverless/container
platforms, relational databases, search systems, and observability practices.
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Leadership & Collaboration
– strong ability to mentor engineers, elevate technical standards, and work effectively across product, UX, QA, DevOps, mobile, and analytics teams.
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Innovation & Problem-Solving
– proactively introduces new ideas, AI capabilities, tools, and processes; able to simplify complexity and drive meaningful improvements.
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Delivery & Communication
– excellent prioritisation, time management, and clear communication; able to deliver high-quality outcomes under pressure.
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We offern
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Hybrid work environment
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Centrally Located Office in Sydney's CBD - Right Near Wynyard Station
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Great Inclusive Team
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Professional Company Culture
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Opportunity to expand your experience and work with like-minded professionals.
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#J-*****-Ljbffr

📌 Principal Full-Stack Engineer (C# / React / Aws) (New South Wales)
🏢 Intertek Inform
📍 New South Wales