Dan Marshall
Senior full-stack engineer with 11+ years of delivering enterprise .NET and JVM systems. Deep expertise in microservices, event-driven architecture, and production AI integration. Strong advocate for TDD, pair programming, and collaborative engineering practices that improve code quality and team velocity.
Qualifications
Bachelor of Science (Mathematics and Computer Science) University of South Africa (UNISA)
Skills
Back-end Development
| Area | Details |
|---|---|
| C# / .NET | Expert knowledge, .NET Framework 3.5 through .NET Core 9 |
| JVM Stack | Spring Boot, Kotlin, Java |
| Architecture | Microservices, event-driven architecture, DI, CQRS, DDD, Clean Architecture |
| Azure | App Services, Functions, Service Bus, Azure SQL, Blob Storage, App Insights, Entra |
| AWS | Bedrock, ECS, SQS, S3 |
| Testing | NUnit, xUnit, MSTest 2, JUnit, Selenium, Storybook, TDD, mutation and integration testing |
| API Development | ASP.NET WebAPI, FastEndpoints, GraphQL, Spring Boot |
| Messaging | MassTransit with Azure Service Bus and event streaming |
| Data Access | Entity Framework Core, Dapper, raw SQL |
| Databases | SQL Server, PostgreSQL, MySQL |
| Security | ASP.NET Identity, OAuth2, JWT, Microsoft.Identity, Azure AD / Entra ID |
| Libraries | MediatR, Serilog, Polly, AutoMapper, Refit, Quartz.NET, OpenAPI |
| DevOps | CI/CD with Azure DevOps, TeamCity, Octopus Deploy, PowerShell, Docker |
| Observability | OpenTelemetry, Seq, OpenSearch, Application Insights SDK, Serilog Sinks |
AI/ML Integration
| Area | Details |
|---|---|
| Production AI Systems | OpenAI Platform, Claude API, LangChain4j, prompt engineering |
| Applications | Automation, multimodal analysis, guardrails |
| Platforms | AWS Bedrock, OpenAI, local LLMs, Hugging Face Transformers |
Front-end Development
| Area | Details |
|---|---|
| Frameworks | TypeScript/JavaScript with React, Angular, Vite, Vitest, and ASP.NET MVC |
| UI Design | CSS, Tailwind CSS, Material UI |
General
| Area | Details |
|---|---|
| Version Control | Git, GitHub, Bitbucket, Azure Repos |
| Agile Tools | Jira, Confluence, Azure DevOps Boards, Teams, Slack |
| Practices | TDD, pair/mob programming, code review, mentorship |
| Operating Systems | macOS, Windows, Linux, iOS, Android |
Employment
Reapit — reapit.com
Senior AI Engineer | September 2025 – February 2026
- Workshopped, built, and deployed an AI-driven property inspection system using AWS Bedrock, generating structured assessment reports constrained by business rules.
- Forked the LangChain4j framework to add Bedrock guardrail support when unavailable upstream. Modular architecture enabled a seamless swap to the official implementation within one day when released.
- Optimised LLM costs through strategic model selection balancing accuracy, features, performance, and token usage.
- Advised cross-functional teams on practical AI use cases.
- Self-directed adoption of the Kotlin/Spring Boot/AWS ecosystem, delivering production features while supporting the team with JVM implementation patterns.
RACT (Royal Automobile Club of Tasmania) — ract.com.au
Senior Software Engineer – Back-end | June 2024 – July 2025
- Applied Clean Architecture and DDD to enhance testability, scalability, and code clarity.
- Involved in pilot program to develop AI coding rulesets and best practices.
- Migrated and modernised core components from .NET Framework 4.7.2 to .NET 9.
- Built resilient microservices using MassTransit, WebAPI, GraphQL, and SQL Server.
- Collaborated with cross-functional teams to deliver scalable, well-tested features aligned with business requirements.
National Grower Register — ngr.com.au
Senior Full-Stack Engineer | November 2023 – May 2024
- Co-developed a modular online form solution (Flexidocs) using Clean Architecture and DDD, replacing an outdated system.
- Designed modern functional React 18 components with TypeScript and Tailwind CSS.
- Provided guidance on C# programming, OOP, AI tools, and testing best practices.
- Researched and selected sustainable technologies to support long-term goals.
- Improved legacy code with unit test coverage, enabling safe refactoring.
- Contributed to technical documentation and Agile processes.
- Mentored junior staff.
CloudMonitor — cloudmonitor.ai
Lead Azure / Back-end Engineer | June 2023 – November 2023
- Conceptualised, developed, and maintained features running on a serverless platform.
- Promoted TDD, SOLID principles, Clean Architecture, and peer programming.
- Introduced Agile processes, leading morning standups and mentoring junior developers.
- Azure DevOps pipeline maintenance and troubleshooting.
- Introduced Entity Framework, OpenAPI, xUnit, and JetBrains Rider.
- Presented company-wide tech talks and engaged with external stakeholders.
VALD — vald.com
Software Engineer – Back-end | January 2023 – May 2023
- Maintained, refactored, and contributed to various legacy REST APIs and microservices.
- Contributed to the integration testing framework.
- Promoted TDD and peer programming.
- Chaired and contributed to various Agile ceremonies.
Situ Systems — situsystems.com
Senior Software Engineer – Full-Stack | November 2021 – October 2022
- Authored numerous front-end and back-end features.
- Substantially increased test coverage and improved testing methodologies.
- Tuned SQL queries, dramatically improving performance in critical reports.
- Used Pulumi to automate deployment of infrastructure.
- Implemented CI workflows in Azure DevOps.
- Contributed to internal development tools.
HUB24 Limited — hub24.com.au
Data and Full-Stack Engineer | December 2019 – November 2021
- Authored a sophisticated and successful system for cleaning, transforming, and validating fund transfers between superannuation funds.
- Maintained strong working relationships with DBAs, architects, BAs, clients (e.g. Bank of New York), and senior management.
- Provided emergency on-call support across the organisation and managed client infrastructure, triaging and fixing or escalating issues to meet strict SLAs.
- Updated legacy web applications to deploy using Azure Pipelines.
- Championed TDD and automated integration testing.
- Authored, maintained, and supported numerous APIs and ETL projects.
Chandler Personalised Communications — chandler.com.au
Data and Full-Stack Engineer | March 2016 – December 2019
- Worked within an ISO 27001 certified organisation meeting strict security standards.
- Built and maintained web applications servicing government, public utility, and financial sectors.
- Web design using ASP.NET, Bootstrap, CSS, jQuery, and JavaScript.
- Database design in Azure SQL Server.
- Authored SSIS ETL packages to cleanse and process superannuation member data for web, print, and email campaigns.
- Liaised with technical and non-technical stakeholders to develop bespoke solutions.
WorldSmart POS Solutions — worldsmart.com.au
Software Engineer, QA and Support | February 2011 – February 2016
- Developed and maintained enterprise software for retail groups.
- Integrated financial, CRM, and stock modules with MYOB.
- Provided QA via automated scripting and manual testing.
- Authored technical and end-user documentation and provided internal training.
- Maintained internal support utilities and automated scripts.
- Installed and supported Point of Sale hardware and software.
Contact
- Email: danmarshall909@gmail.com
- GitHub: github.com/DanMarshall909
- LinkedIn: linkedin.com/in/developerdan
References
Available on request.
“Dan is an absolute pleasure to work with and I would highly recommend him for any full-stack web development position. We worked together for just under a year and during that time Dan was always friendly, professional and went above and beyond when implementing code and designing systems. He has a keen eye for where things can be improved and is always looking to find the optimal solution to any problem he faces. He writes clean, well-structured code that is easy to maintain. He takes advice and constructive criticism well and brings a positive attitude to every meeting. Dan would be an invaluable addition to any software team.”
— Alistair Doulin, CTO, Situ Systems Pty Ltd