Platform Engineer - AI

About the role

HWA International builds the trust accounting software that bank trust departments, credit unions,

foundations, and family offices run their fiduciary operations on. We are an AI-first engineering

organization, and agentic coding tools are how we build. Our platform is in a significant modernization,

and this role is one of the engineers who builds it.

Agentic tooling lets us understand existing behavior and specify what comes next far faster than that

work could be done by hand. You will use it to do exactly that, then build the modern platform end to

end: the C# and .NET services, the web front end, and the AWS infrastructure they run on. This is a full-

stack role, and you own the infrastructure your work runs on.

Accounting accuracy is the product, so correctness is the bar. Anything new has to produce the same

results as what it replaces, or better, and proving that is part of the job.

You will work within an architecture set by engineering leadership, with real influence on it. We work to

modern engineering standards: trunk-based development on GitHub, continuous integration,

infrastructure as code, and feature flags.

What you will do

• Build the modern platform across the stack. Write features, services, and fixes in C# and .NET,

and the web front end that sits on them, against the architecture and patterns the team has set.

• Own the infrastructure for what you deliver. Within the cloud architecture engineering

leadership sets, define and maintain your AWS environments as code, along with the

networking, managed databases, and services behind them, so every environment is

reproducible and version controlled.

• Own delivery and observability. Build and run the CI/CD pipelines, staged rollout, and feature

flags that take your work to production, and the monitoring, logging, and alerting that tell us

how it behaves there.

• Work out what existing code does and write it down. Use agentic tooling to analyze established

application and database logic, then produce a clear written specification of the behavior that

has to be preserved.

• Move business logic into application code and prove it matches. Relocate rules wherever they

live today, including inside the database, into maintainable, tested application code. Build the

data migration paths and test harnesses that show the modern platform's calculations match

the existing ones.

• Verify what the tools give you. Agentic tooling drafts the analysis, the documentation, and

much of the code. An agent's account of what existing code does is a hypothesis until you have

read the code and confirmed it. Characterization tests come before behavior changes.

• Own the work in production. Whatever ships under your name is yours, from the first analysis

through to how it behaves in production. Take part in incident response, communicate clearly

while an issue is open, and follow through to root cause and a durable fix.

What we are looking for

You do not need to be an expert in every layer. Agentic tools let one strong engineer work across the full

stack and the infrastructure under it, so we look for depth where judgment matters most, enough

working knowledge everywhere else to direct the tools and catch their mistakes, and fluency with the

tools from day one.

Where you need depth

• Several years of professional C# and .NET development, with production code you can describe

and defend.

• Strong relational database skills: schema design, query tuning, and correct transaction and error

handling by reflex. PostgreSQL experience strongly preferred.

• Demonstrated ability to work out what unfamiliar code does, including code written in a

language or platform you have not used before, and a repeatable method for doing it safely.

• Agentic coding is table stakes. Deep, hands-on fluency with agentic tools (Claude Code, GitHub

Copilot, Cursor, or similar) as your primary way of working on real production code, from day

one, with the judgment to treat what they produce as work to be checked rather than answers

to be shipped.

Where working knowledge is enough

• Front end: a modern web framework, React with TypeScript preferred.

• Cloud: AWS (Azure considered), infrastructure as code, networking, managed databases, and

containers.

• Delivery: CI/CD with automated testing and zero-downtime deployment, plus production

monitoring and alerting.

Across everything

• Git and GitHub, with trunk-based development and short-lived branches.

• Comfort owning quality on a system that cannot fail quietly: disciplined testing, observability,

and careful, staged rollout.

• Clear written and spoken English, because much of your working contact with the team is

written.

• Availability to work hours that overlap the first half of the US Eastern working day, so you work

with your counterparts rather than around them.

Nice to have

• Experience in financial services or another regulated, high-stakes domain. Trust accounting,

wealth management, or fiduciary services is a strong plus but is not required. We will teach the

domain to the right engineer.

• Experience modernizing an established business application onto a cloud-native stack.

• AWS certification or equivalent depth in security, identity, and cost management on AWS.

• Building software under SOC 1 / SOC 2 or comparable regulated-environment controls.