Newcode.ai

Configurable AI platform for law firms

Senior FastAPI Developer

AI Application EngineeringUpdated on Nov 10

Full-timeOslo, Norway$100k

About the Job

Requirements

At least seven years of experience building backend systems that run in production.
Experience with Python, FastAPI, PostgreSQL or SQL, and Redis; the posting specifies 6+ years with Python, 3+ years with FastAPI, and 2+ years with Redis.
Experience building real LLM-powered systems, or willingness to build them, including retrieval-augmented generation, tool-calling, or agents.
Ability to anticipate system failure modes and design for reliability.
Ability to use AI coding tools such as Claude Code, Cursor, and Copilot while understanding, reviewing, and taking responsibility for generated code.
Comfort working in a startup environment where direction and decisions may change.
Ability to take data security and isolation seriously when handling confidential client material.

Responsibilities

Design and build the APIs and services used by the products.
Develop AI infrastructure including retrieval, orchestration, tool-calling, response streaming, and evaluations of output quality.
Keep asynchronous and distributed work reliable, including document ingestion, embeddings, and long-running jobs using Redis.
Build integrations with client systems such as email and document stores, and ensure they perform reliably under load.
Make early architecture decisions for the backend supporting AI features, APIs, data pipelines, and orchestration between the product and language models.
Process large document sets for retrieval, produce dependable results from language models and their tool calls, stream responses to the user interface, and run long background jobs reliably.
Protect confidential client data through secure, isolated system design.

Desired Qualifications

Experience with retrieval-augmented generation or vector search.
Experience with LangChain or LlamaIndex.
Experience with streaming using Server-Sent Events, WebSocket, or SignalR.
Experience integrating Microsoft Graph and email systems.

Senior FastAPI Developer

Newcode.ai · Oslo, Norway (Hybrid) · Full-time · Posted 2025-07-20

Salary: Up to USD 100,000

Workplace: hybrid

Department: Engineering

Description

Who are we?

We build AI tools for firms in legal and professional services: software people use for real work, not demos. We started a few months ago and already have paying clients who rely on what we ship. The team is small and moving fast.

The role

You'll own the backend behind our AI features. That's the APIs, the data pipelines, and the orchestration sitting between our product and the language models doing the work. In practice it means running retrieval over large sets of documents, getting dependable results out of LLMs and their tool calls, streaming responses to the UI, and processing long jobs in the background without things falling over.

It isn't CRUD work. The hard parts here are keeping AI systems accurate and fast with confidential data, at production scale. You'll make architecture calls early and live with them.

Requirements

What You'll Do

Designing and building the APIs and services our products run on.
Working on the AI plumbing: retrieval, orchestration, tool-calling, response streaming, and the evals that tell us whether the output is any good.
Keeping async and distributed work reliable: document ingestion, embeddings, and long-running jobs on Redis.
Building integrations with the systems clients already use, like email and document stores, and making them hold up under load.
Taking data security and isolation seriously, since clients hand us confidential material.

Who You Are

At least seven years building backend systems that run in production. Depth matters more to us than the number.
You think about how things fail, not just how they behave when everything's fine.
You've built real LLM-powered systems, or you're itching to: RAG, tool-calling, agents. You know where they tend to break.
You use AI coding tools (Claude Code, Cursor, Copilot) and use them well. Faster output, but you understand and stand behind every line; you wouldn't approve sloppy AI-written code in review, so you don't ship it either.
You're fine in a startup that changes direction. Decisions get made, then revisited.

Experience we expect with the stack:

Python: 6+ years
FastAPI: 3+ years
PostgreSQL / SQL
Redis: 2+ years

Nice to have: RAG or vector search experience; LangChain or LlamaIndex; streaming over SSE, WebSocket or SignalR; Microsoft Graph and email integration work.

Visa Sponsorship:

At this time, Newcode is unable to provide visa sponsorship. Candidates must be authorized to work in the applicable country without employer sponsorship.

Benefits

Why Join Us?

Be a driver of innovation in one of Oslo’s most exciting AI ventures
Work with talented peers in a collaborative, high-energy team
Shape both product and culture as we grow
Flexible, English-speaking environment

Apply

Apply at Newcode.ai

About the Company

Newcode.ai

Configurable AI platform for law firms

Newcode.ai builds a configurable AI harness for law firms, acting as an intelligence layer that connects firm data, contextualizes knowledge across documents, and creates agentic workflows while letting firms control models, permissions, and deployment (cloud or on-prem). Its products include workflow builders, Word drafting add-ins, and document analysis, with clients such as DLA Piper Nordic and Robinson+Cole. The company’s approach centers on governance and integration rather than a single-purpose chatbot, differentiating it from competitors by offering end-to-end AI workflows aligned to legal workflows. The goal is to help law firms securely adopt AI, scale usage across engagements, and expand in the US market while deepening product and engineering capabilities.

Company size: 11-50
Company stage: Series A
Total funding: $20M
Headquarters: Oslo, Norway
Founded: 2021

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