Founding engineer

Salary Competitive
Equity To be negotiated

Early-stage start-up seeks Technical Co-Founder

Early-stage company seeks an exceptionally talented Technical Co-Founder with deep AI/ML expertise to help pioneer a new category of intelligent software. You will be responsible for architecting, building, and scaling core systems that are foundational to the company’s product and long-term competitive advantage.

You must have extensive experience designing and implementing complex, production-grade AI / machine learning systems, and you should be able to do so with a level of speed, clarity, and rigor that most highly competent engineers consider unrealistic. A strong grounding in computer science fundamentals is required.


Ideal candidates will have hands-on experience with several of the following:

  • Modern machine learning and deep learning techniques (e.g., transformers, foundation models, representation learning)

  • Training, fine-tuning, and deploying large-scale models

  • Data pipelines, evaluation frameworks, and experimentation systems

  • Scalable backend Enterprise systems and infrastructure

  • Translating ambiguous product ideas into concrete technical architectures


A BS, MS, or PhD in Computer Science, Engineering, Mathematics, or a related field is expected, or equivalent real-world experience. Exceptional communication skills and strong technical judgment are essential. Prior startup experience is a plus, but not required.

Expect talented, motivated, intense, and highly curious collaborators. This role is for someone who wants to build from first principles, make foundational decisions, and own outcomes end-to-end.

Compensation will include meaningful founding equity and competitive cash, commensurate with experience and stage. This is a true co-founder role, not an early employee position.


If you are interested in inventing the future rather than iterating on the present, we would like to hear from you.

For more information or questions please contact us at stian@co-sak.no or phone number +47 99 33 53 98

Perks and benefits

This job comes with several perks and benefits

Near public transit
Near public transit

Working at
Co-sak

Our Mission Modern organizations are constrained not by a lack of intelligence, but by the way intelligence is applied. Decisions that should be systematic, auditable, and repeatable are instead handled through informal processes, institutional memory, and ad-hoc judgment. This creates inconsistency, opacity, and risk at scale. Our mission is to bureaucratize AI, not to add friction, but to add structure. We believe the next phase of artificial intelligence is not about replacing human judgment, but about formalizing it. By embedding AI into well-defined procedures, rules, and workflows, we aim to make complex decision-making reliable, transparent, and governable across organizations. Decision Support We build AI decision support systems that operate as institutional infrastructure rather than isolated tools. These systems do not issue commands; they surface options, trade-offs, and consequences in a way that aligns with organizational policy and accountability. By combining machine learning with explicit process design, our platforms augment human operators while preserving oversight and intent. Decisions become faster without becoming arbitrary, and scalable without becoming opaque. In doing so, we enable organizations to apply intelligence consistently at the speed and scale their operations require.

Read more about Co-sak

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