Software Developer building production AI agents and MCP integrations for Euna Solutions’ cloud - based public - sector budgeting software. Deploying secure LLM features with Python or TypeScript in a hybrid Oakville team.
About the role
- Senior Software Engineer architecting and developing AI-powered internal tools for accounting. Collaborating with internal teams to improve business processes and enhance software products.
Responsibilities
- You'll design and build the systems that run Treewalk's business — internal tools, integrations, and workflow automations — using AI coding tools to accelerate delivery without sacrificing quality
- You'll operate as a hands-on builder who starts from accounting processes and business operations, translates them into clear technical specifications, and ships robust, production-grade solutions.
- You will own the technical direction of our product stack: architecture decisions, security posture, code quality standards, and how we scale responsibly as these tools move from internal use to client-facing deployments.
- In this role you'll regularly navigate ambiguous problem spaces and serve as the technical anchor for AI-native software development practices at Treewalk.
- You'll help define what the future of accounting work looks like — through thoughtful, responsible development of a finance and accounting suite of tools built on modern AI infrastructure.
- Architect, build, and iterate on internal AI-powered tools — invoice processing, accrual workflows, document classification, client reporting, and more.
- Write production-quality code and set the technical bar for how the team builds, reviews, and ships software.
- Partner with internal accounting staff to understand process pain points and translate them into clean system designs.
- Define and enforce security, data handling, and access control standards as tools expand to client environments.
- Own architectural decisions: service design, data models, API contracts, queue/worker patterns, cloud infrastructure.
- Establish code quality standards and review practices, including responsible use of AI-generated code.
- Identify and mitigate technical risk proactively — especially as systems handle sensitive financial data.
- Document systems clearly so that non-engineers can understand what's been built and why.
- Work closely with the internal product lead (non-engineering background) to bridge business requirements and technical execution.
- Surface trade-offs clearly and make pragmatic calls under ambiguity.
- Contribute to hiring and capability-building as the team grows.
Requirements
- 5+ years of software engineering experience building and shipping production systems, products, or platforms
- Demonstrated experience building and operating production backend systems: APIs, queues, workers, databases
- Strong command of at least one modern backend language (Node.js/TypeScript, Python, Go, or similar)
- Solid understanding of cloud infrastructure and deployment (AWS, GCP, Azure, or Render-equivalent platforms)
- Experience with common integration patterns: webhooks, REST APIs, event-driven workflows, third-party SaaS connectors
- Strong security fundamentals — authentication, authorization, secrets management, data handling for sensitive financial data
- Excellent written communication; able to document architecture and explain technical decisions to non-engineers
- Comfortable working in a small, high-ownership environment where requirements evolve.
Benefits
- This is a formative role in a fast-growing service line — you'll have real influence over the architecture, culture, and direction of how we build
- A collaborative, supportive team that takes the work seriously without taking itself too seriously
- Flexible working arrangements and a genuine commitment to work-life balance
- Extended healthcare benefits from Day 1 — no waiting period
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