Company logo

Sanna

Last updated: 2 days ago

Sanna

Principal Engineer, AI & Automation

Full-time

in

Oslo

Who we are looking for

We're looking for a pragmatic builder who knows when AI is the answer, and more importantly, when it isn't.

or

Highlights

AI & Automation
Accounting Tech
Greenfield
TypeScript
PostgreSQL
Svelte
Technical Leader
SaaS Platform
High-trust domain
Fintech

Build the engineering and AI foundation of a global accounting platform

Sanna is building a new kind of accounting firm - one designed for a world where AI can automate the manual work that has defined the industry for decades.

Our goal is simple: challenge how accounting works globally by rebuilding it from the core. We combine AI, software, and human expertise to create systems that are reliable, scalable, and trusted. We aren’t just building an AI wrapper; we are replacing manual labor with production systems that accountants and businesses can rely on.

We are now hiring a Principal Engineer to work at the core of the product, shaping the foundation that automates accounting and operational workflows.

Build the AI foundation for the future of accounting

About the job and why it matters

Much of accounting today is still manual or semi-automated. You’ll help decide when AI adds value, when deterministic rules are better, and when human-in-the-loop workflows are necessary.

The choices you make here will directly shape the accuracy, reliability, and scalability of our platform. This is a hands-on leadership role: you’ll tackle complex problems end-to-end (from frontend interfaces to backend systems) and set the technical foundation for the future of accounting at Sanna.

Build and evolve core systems powering accounting automation, including user-facing interfaces
Design AI-powered, rule-based, and hybrid workflows to replace manual processes
Balance accuracy, reliability, performance, and cost in production AI systems
Improve platform foundations: data flows, abstractions, observability, testing, and reliability
Collaborate closely with product managers, designers, and accountants to turn workflows into scalable systems
Own complex problems from design through production and iteration
Who we're looking for
You don’t need to tick every box - depth in some areas, ownership, and ability to learn quickly matter more than years or titles.
Experienced principal engineer or tech lead building production SaaS platforms
Deep expertise in TypeScript (bonus: Effect.ts) and PostgreSQL, comfortable across the full stack
Experience with production systems involving LLMs, document processing, or AI-driven workflows
Pragmatic judgment: when to use AI vs deterministic rules vs human review
Strong engineering judgment in high-accuracy, high-trust domains where mistakes matter
Clear communicator who can reason through ambiguity and make sound trade-offs
Curious and eager to question assumptions and continuously improve

Define the future

Why this is interesting
Work on greenfield systems with real production impact
Directly shape how AI is applied in a high-trust, regulated domain
Influence product direction and long-term architecture
High autonomy and ownership over technical decisions
Solve intellectually hard problems, not just technically complex ones

Tools of the trade

Our frameworks & tools
While you don't need to tick every box, this is the stack you'll be working with. Depth in some areas and the ability to learn quickly matter most.
Frontend
Svelte 5 & SvelteKit, Tailwind CSS
Backend & language
TypeScript, Effect.ts
Database
PostgreSQL
Testing & DX
Storybook, Playwright, Graphite
Infrastructure & observability
Vercel, PostHog, Grafana, Workflow

Office location

Oslo, NO

Møllergata 6, 8, 0179 Oslo, Norway

Who we are

Sanna is building a new kind of accounting firm – one designed from the ground up for a world where AI can take over much of the manual work that has defined the accounting industry for decades. Our ambition is not to be a better local firm, but to challenge how accounting works globally.

We combine AI-driven workflows, modern technology, and deep professional expertise to give founders the peace of mind of a traditional accounting firm, while fundamentally changing how the work is done behind the scenes.

Key figures

350+ customers
And we're adding new ones fast
10
Employees

Powered by

Vouch