AI that works in practice
We build products that go into the real work of hospitals and screening centers, and see up close how they are used in clinics and in patients’ lives.
Careers
Join us in building
AI for healthcare.
TESSER connects hospital workflows, patients’ daily lives and life-science research through Ontol. We’re looking for people who bring medicine, technology, regulation and product together to shape what comes next in healthcare.
See open positions
Why TESSER
Technology that understands healthcare,
change that reaches practice.
Different expertise, one team
AI research, engineering, privacy, regulatory and product look at the same problems together. In a field as complex as healthcare, good decisions come from many perspectives.
From problem to outcome
You define the problems in your area, decide how to solve them and own the outcome. As the team grows, you also help shape how we work.
Open Positions
Open positions
ResearchAI Researcher
Research the AI behind Ontol that understands medical records and test results, and turn it into models used in hospital work.
What you’ll do
- Research and improve LLMs and agents for hospital work such as test result analysis, clinical documentation and report generation.
- Design retrieval and reasoning methods that combine models with ontologies of medical terms and workflow relationships.
- Build evaluation data and frameworks that reflect clinical review standards, and validate accuracy and safety.
- Experiment with engineers and the product team to bring research results into the product.
What we’re looking for
- Research or development experience in natural language processing or machine learning
- Hands-on experience implementing and testing language model techniques such as fine-tuning, prompt design and RAG
- Fluency in Python and deep learning frameworks such as PyTorch
- Ability to design experiments and explain results with evidence
Nice to have
- Experience with medical text or data such as EMRs, screening results or radiology reports
- Research experience in knowledge graphs, information extraction or structured output
- Publications at major conferences
- Experience with model serving and inference optimization
PrivacyPrivacy Specialist
Design and run the privacy program that keeps patient and hospital data safe and lawfully used.
What you’ll do
- Map how personal data flows through Ontol and set standards for collection, use, sharing and deletion.
- Write and maintain privacy policies, consent flows and data processing agreements.
- Review the privacy impact of new features and data partnerships, and set pseudonymization standards.
- Respond to security and privacy reviews from hospitals and partners, and lead preparation for certifications such as ISMS-P.
- Run privacy training and internal controls for the team.
What we’re looking for
- Hands-on experience in privacy or information security
- Understanding of the Personal Information Protection Act and related laws and guidelines
- Experience with privacy impact assessments, privacy policies and consent design
- Ability to understand technical data flows with engineering and product, and align on standards
Nice to have
- Privacy experience in healthcare
- Experience with pseudonymized data and data linkage
- ISMS-P certification experience, or credentials such as CPPG or CISSP
- Understanding of cloud security and access control
RegulatoryRegulatory Affairs Director
Lead the regulatory strategy that brings Ontol’s medical AI products to market in Korea and abroad.
What you’ll do
- Assess whether and how each product is regulated as a medical device, and set the regulatory roadmap.
- Lead MFDS approvals, certifications and reviews for software and AI medical devices.
- Lead clinical and performance evaluation plans and technical documentation with research and engineering.
- Build and run the medical device quality management system.
- Track regulatory change and build requirements into products from the planning stage.
What we’re looking for
- Hands-on and leadership experience in medical device regulatory affairs
- Experience with MFDS approvals, certifications and technical file reviews
- Understanding of regulation for software medical devices or digital health
- Ability to lead discussions with regulators, hospitals and partners
Nice to have
- Experience with AI medical device approvals or innovative medical device designation
- Experience with FDA, CE or other international approvals
- Experience with clinical trial design and IRB reviews
- Documentation under ISO 13485, IEC 62304 and ISO 14971
ProductProduct Owner
Define the problems hospitals and patients face, and set the direction and priorities that turn Ontol into real value.
What you’ll do
- Meet hospitals, screening centers, patients and partners to understand their work and define the problems to solve.
- Own the roadmap and backlog priorities, and ship features with engineers, designers and AI researchers.
- Write clear requirements and acceptance criteria, and lead decisions during development.
- Measure outcomes with usage data and field feedback after launch, and keep improving.
- Work with privacy and regulatory to build requirements into product design.
What we’re looking for
- Product owner or product manager experience in B2B SaaS or healthcare
- Experience defining problems and priorities through user interviews and data analysis
- Experience launching and running products with engineering and design
- Ability to structure complex requirements and communicate them clearly in writing
Nice to have
- Understanding of hospital systems such as EMR, OCS and PACS, or clinical workflows
- Experience planning or launching LLM-based products
- Experience building products in regulated industries such as medical device software
- Experience planning or running patient-facing mobile apps
Hiring Process
How we hire
- 01
Application review
We review your résumé and portfolio for experience and fit.
- 02
Role interview
Talk with future teammates about your experience and how you solve problems.
- 03
Final interview
Meet the leadership team to talk about how TESSER works and what we expect of each other.
- 04
Offer and onboarding
Agree on the offer and set your start date.
Some roles include an assignment or an additional interview.
Apply
Send us your application.
Choose a position and attach your résumé. If no role fits right now, send an open application and tell us about yourself.
You can also apply by email: contact@tesser.io