Senior Software Engineer

Treewalk is a full-service accounting firm serving a diverse client base across public companies, private enterprises, First Nations, and government entities. We combine deep technical expertise with a forward-thinking culture – and we’re looking for someone to take the next steps of AI integration into accounting with us.

We’re building custom internal systems at the cutting edge of agentic AI in the accounting and finance space. The Senior Software Engineer will be the hands‑on architect and builder of the new systems shaping our business — and the technical counterpart to our internal product leadership.

The Role
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 ’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.

What Your Days Will Look Like
Product development
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

Technical Leadership
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

Collaboration & Iteration
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

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/Type Script, 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

Assets

Experience with AI/LLM application development: prompt engineering, tool use, agentic workflows, output validation

Familiarity with low‑code/workflow automation platforms (n8n, Make, Zapier) and their integration into code‑native systems

Prior work with accounting or finance software APIs (Quick Books, Xero, or similar)

Experience with document processing pipelines (OCR, PDF extraction, classification)

Background working in or alongside finance, accounting, or professional services environments

Treewalk For a Reason
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

Annual Salary:  $,000

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