AI Lead / AI Engineer

Mojob; Oslo; Hybrid; NOK 2,000,000 - 3,500,000; Full time

Job summary

Mojob is building a modern hiring platform and scaling AI capabilities to connect talent with companies at scale. As Head of AI, you will lead production-grade AI features, from retrieval to candidate scoring, while ensuring cost, quality and compliance in hiring.

You will shape the stack, evaluate changes, and deliver high-impact capabilities like matching, screening, and assistants, with a focus on explainability, privacy and governance.

Qualifications

• Proven track record building production AI features in a SaaS product.
• Strong SQL/PostgreSQL and API design experience.
• Experience shipping LLM-based features such as RAG and vector search.
• Ability to build evaluation and monitoring for AI systems.
• Understanding of multi-tenant SaaS, async workers, and incident response.
• Familiarity with AWS and modern observability tooling.
• Excellent English communication and collaboration skills.

Responsibilities

• Design, build, and lead production AI features end‑to‑end: retrieval, ranking, summarisation, structured extraction.
• Own shared AI primitives: embeddings store, RAG services, evaluation harnesses.
• Deliver capabilities like talent–job similarity and explainable candidate scoring.
• Handle screening, resume parsing to structured skills, and knowledgebase Q&A.
• Integrate AI capabilities with APIs, observability, and per‑tenant cost tracking.
• Define evaluation suites, regression tests, and monitor quality, latency, and cost.

Skills

Software engineering

SQL/PostgreSQL

LLM features

RAG & vector search

Multi-tenant SaaS

AWS

Observability tooling

English fluency

Tools

Python (Django)

Vue/Nuxt

Flutter

PostgreSQL

pgvector

Elasticsearch

Redis

Celery

AWS

Kubernetes

Job description

Why this matters

At Mojob, we are building a better way to connect the right talent with the right companies.

What began as a marketplace for small jobs has evolved into a modern hiring and staffing platform, used in production since 2019 across both public and private sectors. After years of product development, strategic decisions, and key pivots, we are now moving from foundation-building to scaling. AI will be critical to this next phase — and this is where you come in.

As Head of AI, you will lead and build production‑grade AI capabilities that help redefine how people discover work and how companies find talent, at scale.

What you will be working on

AI is already part of our product: CV parsing, semantic skill matching, embedding pipelines, OpenAI based agents integrated with our core platform.

You’ll help shape what we build and how – evaluating our stack, recommending changes, and delivering high‑impact capabilities like matching, screening, RAG‑based support, and assistants, with a focus on quality, cost, and compliance in hiring.

• Design, build, and lead production AI features end‑to‑end: retrieval, ranking, summarisation, structured extraction, and agent workflows
• Own shared AI primitives – embeddings store, RAG services, evaluation harnesses – reused across multiple product areas
• Deliver high‑impact capabilities such as talent–job similarity, explainable candidate
• screening, resume parsing to structured skills, support/knowledgebase Q&A, and job‑description assistance
• Integrate AI capabilities into our services with clear APIs, observability, and per‑tenant cost tracking
• Define and maintain evaluation suites, regression tests for prompts/retrieval, and monitoring for quality, latency, and cost
• Ensure responsible AI practices: explainability for scoring, audit logging, PII handling and bias awareness in hiring workflows
• Collaborate closely with product and engineering to ship MVPs in focused cycles and iterate based on real usage

Tech stack

• Python (Django) for backend services; Vue/Nuxt and Flutter for frontend applications
• AWS, Kubernetes
• PostgreSQL (with pgvector), Elasticsearch, Redis
• Celery for asynchronous task processing

We believe in pragmatic engineering — with a focus on safety and quality, shipping quickly what delivers value, learning fast, and iterating from there.

What we are looking for

Required experience

• Strong software engineering experience building production systems
• Solid SQL/PostgreSQL and API design experience
• Demonstrable experience shipping LLM‑based features used by real customers, including RAG, embeddings, vector search, and structured LLM outputs
• Experience building evaluation and monitoring for AI systems (golden sets, regression tests, cost/latency telemetry)
• Understanding of multi‑tenant SaaS, async workers (e.g. Celery), and production incident response
• Familiarity with cloud platforms (preferably AWS) and modern observability tooling
• Strong communication skills and fluent in English

Highly valued

• OpenAI APIs, Agents SDK, LangChain, or similar agent/orchestration frameworks
• pgvector, Pinecone, or other vector databases; hybrid search with Elasticsearch
• HR tech, marketplaces, or other domains with compliance and high‑stakes decisions
• Document understanding (CV/resume parsing) and conversational assistants
• Pragmatic MLOps: feature flags, prompt versioning, shadow deployments
• Experience with fine‑tuning or adapting models (e.g. OpenAI fine‑tuning, LoRA, domain adapters) when retrieval and prompting are insufficient — including eval before/after and safe rollout
• Awareness of the EU AI Act and its implications for HR/hiring systems (risk classification, transparency, human oversight, documentation)

Personal qualities

• Strong systems thinking and delivery focus: You finish what you start
• Pragmatic: You balance innovation with stability, cost, and user trust
• Strong communicator and collaborator: You are able to work in diverse teams and build systems from the ground up
• Curious and discerning: You’re in the know and can separate hype from reality, and measure what matters
• Ownership in a small team: You take end‑to‑end responsibility for your work — from idea and design through delivery, monitoring, and follow‑up — without waiting to be assigned every step
• Proactive problem solver: You take initiative, spots gaps, risks, and blockers early, and drive work forward in a team of ~10 (with 2-3 people focused on AI)

We value openness, collaboration, and an enjoyable work environment.

What we offer

• High trust and ownership
• Meaningful product impact on a platform in growth
• Autonomy to shape AI architecture and delivery practices
• Remote work or hybrid work from our Oslo office
• Collaborative, sharing and diverse team
• Competitive compensation and opportunity to grow with Mojob’s AI roadmap