RaySearch is expanding in the field of machine learning and is looking for a Machine Learning Engineer with strong software engineering skills to join our head office in Stockholm. Joining our team provides you with a unique opportunity to innovate and develop software that improves the lives of cancer patients around the world.

About the job

You will be part of an agile team developing innovative solutions using machine learning algorithms to automate and improve future cancer treatments. As a member of the ML Planning team you will develop cutting-edge deep learning methods to accurately predict radiation dose distributions that will be deployed at cancer clinics worldwide.

In radiation therapy, treatment planning is the process of determining how to deliver a precise dose of radiation to a tumor while minimizing exposure to surrounding healthy tissue. This is a complex optimization problem that requires careful balancing of clinical goals. Our deep learning models predict 3D dose distributions directly from patient anatomy (CT images and structure sets), enabling clinicians to rapidly generate high-quality treatment plans for techniques such as VMAT and IMRT. The predicted dose serves as input to downstream optimization, significantly reducing the time and expertise needed to produce clinically acceptable plans.

You will

Your day-to-day work will involve training, evaluating and operationalizing deep learning models for dose prediction. This includes analyzing results using clinical metrics such as dose-volume histograms (DVH), ensuring that predictions meet acceptance criteria for organs at risk (OARs) and target volumes. You will work with real clinical datasets and iterate closely with medical physicists and oncologists to validate model performance against clinical standards.

Your focus will be on the machine learning algorithms as well as on developing, maintaining, and improving the production code base in RayStation. Our models are integrated into RayStation, a treatment planning system used by clinics globally, so engineering rigor matters as much as model accuracy. We value engineers who write clean, testable, well-structured code and who take ownership of the full lifecycle from research prototype to clinical deployment in a regulated medical device context.

You will work closely with domain experts, system developers and product owners as well as leading cancer centers to understand the product and develop tools that will make a real difference.

Your profile

You are someone who genuinely loves both research and coding. You read papers for fun, get excited about new architectures and training techniques, and then want to immediately implement and test them. You are not just an ML practitioner who trains models, you are a strong software developer who cares about code quality, system design, and building things that last. You write code that others can read, review, and extend with confidence.

You are autonomous and self-driven. Given a problem, you take ownership: you research the landscape, form a plan, and execute without needing to be guided through every step. You know when to dig deeper on your own and when to pull in a colleague. You are comfortable making decisions, and you communicate clearly about what you are doing and why.

You take pride in delivering high-quality results and thrive in a dynamic, fast-paced environment. You contribute to a positive team atmosphere and take responsibility for your work. Above all, you care about building software that makes a meaningful impact for healthcare professionals and their patients.

Experience & skills

Requierments

• M.Sc. in Computer Science, Machine Learning, or equivalent
• Minimum 4 years of professional experience in software development, machine learning, or a related field
• Excellent understanding of machine learning techniques and algorithms
• Strong programming skills in Python with emphasis on writing clean, maintainable, production-quality code
• Solid software engineering practices: version control, code review, testing, CI/CD awareness
• Experience using deep learning frameworks such as PyTorch or TensorFlow
• Solid knowledge of data structures, algorithms, statistics, and applied mathematics
• Comfort working in large, collaborative code bases and contributing to shared architecture decisions
• Excellent spoken and written communication skills in English

Meriting

• Experience using deep learning for computer vision
• Experience in model development: Transformers, CNNs, U-Nets, or relevant architectures for dose prediction
• Experience with MLOps tooling (experiment tracking, model registry, deployment pipelines)
• Experience fine-tuning and post-training LLMs using Full SFT / LoRA, DPO, RLHF, with custom data curation and evaluation pipelines
• Contributions to open source projects
• Familiarity with C# and/or systems-level languages
• Experience working in regulated or safety-critical software environments (e.g., medical devices, automotive)
• Interest in or exposure to radiation therapy or medical physics

Our Culture 

At RaySearch, we share a passion for innovation and the fight against cancer. Our team consists of dedicated experts who strive to deliver exceptional results through collaboration, attention to detail, and cutting-edge technology. We take pride in our role as a leader in cancer treatment, developing solutions that truly make a difference for patients worldwide. 

Our Offer 

We offer a dynamic and inclusive work environment in Hagastaden, Stockholm’s Life Science Hub. Our modern office space includes an in-house gym, yoga classes, and social activities such as ping pong, table football, and after-work events. We also provide a fantastic lunch buffet, daily fika, and a stunning rooftop terrace with a 360-degree view of Stockholm. This comes with a competitive compensation and benefits package. 

Application 

Please apply for the position through the application form below. Selection and interviews will be ongoing. We do not accept applications via e-mail. 

We are looking for a Product Strategy Manager to define and drive the long-term strategic direction and commercial success of our oncology information system RayCare. Join us in shaping product strategy, strengthening our market positioning, and contributing to the development of solutions that support cancer treatment worldwide. 

About the job

In this role, you will be responsible for driving product strategy by combining market insight, customer understanding, and cross-functional collaboration. You will work closely with stakeholders across the organization to define product vision, positioning, and roadmap priorities, ensuring that our offerings create customer value and align with business goals. 

You will drive strategic and commercial initiatives to strengthen market positioning and long-term profitability. You will also manage and coordinate deliverables across functions, ensuring execution and completion. 

You will be part of the Corporate Development & Strategy department and report to the Director of the department. The role involves close collaboration with stakeholders across sales, service, development, regulatory, and senior management. 

Your main tasks

• Responsible for market, customer, and competitor analysis, including identifying trends and unmet needs
• Synthesize insights from internal and external sources into clear recommendations and strategic actions
• Facilitate cross-functional collaboration to define product vision, positioning, and strategic priorities
• Provide strategic input to product roadmap prioritization and direction, ensuring alignment across customers, partners, and internal stakeholders
• Contribute to pricing and packaging models in collaboration with Sales and Legal
• Enable and guide go-to-market activities, including defining messaging, value propositions, and proof points
• Support commercial initiatives that translate product strategy into revenue impact and strengthened market position
• Participate in customer-facing activities such as executive briefings, workshops, and roadshows
• Support evaluation of potential partnerships and acquisitions, including strategic fit and impact
• Contribute to market entry strategies for new regions and stakeholder landscapes
• Define product marketing needs and provide guidance to Marketing and Sales on content, positioning, and high-impact platforms
• Collaborate with Quality and Regulatory to ensure alignment between commercial and regulatory strategy

Your profile

You have a strong strategic mindset and the ability to translate insights into concrete actions. You are comfortable working cross-functionally and navigating a complex stakeholder landscape, and you can balance long-term strategic thinking with hands-on execution. 

You are pragmatic and solution-oriented, with a strong drive to create business impact. You communicate clearly and can structure complex information in a way that creates alignment across stakeholders. 

Experience & skills

• Relevant higher education such as Business Administration, Economics, Industrial Engineering, Engineering, Computer Science, a Clinical or Radiotherapy-Related Degree, or a related field 
• Clinical experience working as a radiographer, clinical scientist or dosimetrist within an Oncology department  
• Background from roles involving strategic or commercial product work, strategy, or business development 
• Hands-on experience with market, customer, and competitor analysis 
• Experience contributing to strategic initiatives and/or product or portfolio-related work 
• Experience working cross-functionally across multiple stakeholders 
• Very good command of English, spoken and written 

It is an advantage, but not a requirement, if you also have experience with go‑to‑market strategy, pricing or product positioning, customer‑facing activities, regulated or complex technical environments, and partnerships, market entry strategies, or commercial evaluations.

Our Culture

At RaySearch, we share a passion for innovation and the fight against cancer. Our team consists of dedicated experts who strive to deliver exceptional results through collaboration, attention to detail, and cutting-edge technology. We take pride in our role as a leader in cancer treatment, developing solutions that truly make a difference for patients worldwide.

Our Offer

We offer a dynamic and inclusive work environment in Hagastaden, Stockholm’s Life Science Hub. Our modern office space includes an in-house gym, yoga classes, and social activities such as ping pong, table football, and after-work events. We also provide a fantastic lunch buffet, daily fika, and a stunning rooftop terrace with a 360-degree view of Stockholm. This comes with a competitive compensation and benefits package.

Application

Please apply for the position through the application form below. We do not accept applications via e-mail.

Do you want to build software that truly saves lives? At RaySearch, you’ll have the opportunity to influence cancer care worldwide through code, architecture, and leadership. We are looking for an experienced developer who wants to take the next step and combine advanced development with a people-focused leadership role as a Group Manager.

Our development organization consists of approximately 160 highly engaged colleagues who build software used daily in cancer clinics around the globe. As we continue to grow, we are looking for additional group managers who want to help shape our technology, our teams, and our future.

About the role

This role offers the best of both worlds, combining hands-on technical work with people leadership. You will have personnel responsibility for a team of 8–12 developers while remaining an active contributor to the development of RayStation, our Treatment Planning System.

As a Group Manager, you focus on enabling your team to succeed. You support and develop your employees through regular one-on-one conversations, competence development, and recruitment. You will not be alone in your leadership role, but part of a collaborative management context with support from both peers and the wider organization.

In your role as a developer, you work close to the domain on technically demanding solutions and contribute to building robust, scalable systems. Depending on your background, you will work across backend, frontend, or full-stack development, contributing to architecture and system design. Our solutions are built using modern architectural principles such as Domain-Driven Design, event-driven systems, and asynchronous communication, in an environment where security, data integrity, and reliable system communication are critical. Your technical expertise will have a direct and meaningful impact on patient care.

Your profile

You have a strong technical foundation in .NET development and a clear interest in taking responsibility for both people and technical delivery. You are motivated by building high-performing teams, creating structure, and contributing to a safe and sustainable working environment. With a humble and communicative leadership style, you build trust and take ownership of people-related topics such as performance conversations, competence development, and recruitment, with support from the organization. You are self-driven, proactive, and results-oriented, with the ability to combine deep technical understanding with a present and engaged leadership approach.

To succeed in this role, you bring:

• A Master’s degree in Engineering or an equivalent academic background
• At least 7 years of experience developing complex products using .NET
• A genuine interest in people leadership and personnel responsibility
• Experience from leadership roles or informal leadership in development teams
• A strong drive to contribute to and further develop the engineering organization
• Fluency in English, written and spoken.

Previous experience in a role with formal people management responsibility together with fluency in Swedish is not required but considered as highly meritorious.

Our Culture

Culture at RaySeach is the driving force behind our organization, where everything we do is driven by a shared passion for innovation and the fight against cancer. Our dedication is reflected in our ability to deliver exceptional results, pay close attention to detail, and consistently go the extra mile. Our employees stand out as experts in their field, driven by a relentless focus on solving problems - no matter how complex. At RaySearch, we take pride in leading the way in cancer treatment, leveraging cutting-edge technology to develop innovative solutions that make a real difference in patient care.

Our Offer

At RaySearch, we offer a diverse and inclusive work environment, fostering openness, sincerity, and collaboration. Located in Hagastaden, Stockholm's Life Science Hub, our modern and creative workspace includes an in-house gym, yoga, and social activities like ping pong, table football, and regular after-work events. Our bistro serves a fantastic lunch buffet, and we offer morning- and afternoon-fika every day. Our rooftop terrace also provides a stunning 360-degree view of Stockholm, enhancing the work experience. All of this comes attached with a competitive compensation and benefits package.

Application

Please apply to the position through the application form below. We do not accept applications by e-mail. Selection and interviews will be ongoing.

We are looking for a System Developer who can blend software development expertise with a strong interest in security. In this role, you’ll contribute directly to RaySearch’s mission: advancing cancer treatment through innovative software. By ensuring that our products are designed and implemented securely, you help protect both patients and healthcare professionals and strengthen the reliability of the tools they depend on.

About the role

As a System Developer within cybersecurity, you will play a key role in shaping our secure development practices. You will work closely with development teams to embed security into the software development lifecycle and ensure that our products follow industry-leading standards. The role combines hands-on application security work—such as secure code reviews, threat modeling, and penetration testing—with knowledge sharing, training, and collaborative support to help teams make informed security decisions.

This is an ideal role for a developer who enjoys cybersecurity and wants to contribute by guiding others, elevating security awareness, and helping teams work securely and effectively together.

Your main tasks

• Work with development teams to implement application security best practices throughout the SDLC.
• Participate in threat modeling (e.g., STRIDE) and risk assessments for new and existing applications.
• Assist in designing and implementing cybersecurity controls in products.
• Ensure compliance with cybersecurity frameworks and standards.
• Contribute to developer security awareness training and promote secure development practices.
• Perform secure code reviews, static/dynamic analysis, and penetration testing.
• Develop and maintain secure coding guidelines and security documentation.
• Support the preparation of cybersecurity documentation for regulated products (including FDA-related frameworks).

Your profile

You are a developer with a strong interest in cybersecurity and secure design. You enjoy sharing knowledge, collaborating with others, and supporting development teams in building secure solutions. You communicate clearly, work constructively across functions, and contribute to a culture where security is a natural part of everyday development.

Required skills

• Proficiency in C#, .Net Core, and related technologies. 
• Strong understanding of application security principles (e.g., OWASP Top 10, secure coding).
• Experience with threat modeling and risk analysis.
• Excellent ability to produce clear, structured security and compliance documentation.

It’s an advantage, but not required, if you also have experience of:

• Working in regulated environments (e.g., medical devices, embedded systems).
• Hands-on experience with security testing tools (e.g., SonarQube, Burp Suite).
• Familiarity with FDA cybersecurity guidelines, the IEC 8100x series, or IEC 62443 for industrial/embedded systems.
• Integrating security into CI/CD pipelines (Azure DevOps or GitHub Actions).

Our Culture

Culture at RaySeach is the driving force behind our organization, where everything we do is driven by a shared passion for innovation and the fight against cancer. Our dedication is reflected in our ability to deliver exceptional results, pay close attention to detail, and consistently go the extra mile. Our employees stand out as experts in their field, driven by a relentless focus on solving problems - no matter how complex. At RaySearch, we take pride in leading the way in cancer treatment, leveraging cutting-edge technology to develop innovative solutions that make a real difference in patient care.

Our Offer

At RaySearch, we offer a diverse and inclusive work environment, fostering openness, sincerity, and collaboration. Located in Hagastaden, Stockholm's Life Science Hub, our modern and creative workspace includes an in-house gym, yoga, and social activities like ping pong, table football, and regular after-work events. Our bistro serves a fantastic lunch buffet, and we offer morning- and afternoon-fika every day. Our rooftop terrace also provides a stunning 360-degree view of Stockholm, enhancing the work experience. All of this comes attached with a competitive compensation and benefits package.

Application

Please apply to the position through the application form below. Selection and interviews will be ongoing. We do not accept applications by e-mail.

Are you passionate about creating smooth, efficient development processes? Do you thrive in agile environments where collaboration, automation, and continuous improvement drive success? Would you like to be part of a team developing cutting-edge software that supports cancer care around the world? Then join us at RaySearch Laboratories as a DevOps Engineer and help shape the future of oncology information systems.

About the role

RaySearch is developing advanced software solutions to improve cancer treatment worldwide. As a DevOps Engineer at RaySearch, you’ll be part of a collaborative team driving automation, efficiency, and reliability across our development environments. You’ll work closely with developers and DevOps engineers across several products — including our oncology information system and treatment planning system — to optimize build pipelines, release processes, and development workflows. As our configuration teams grow, you’ll have great opportunities to shape routines and ways of working together. Your main tasks will be to:

• Strive to make the development iteration times short and efficient

• Manage build and release flows using pipelines

• Create and manage tools using the Azure DevOps API to input and output information

• Manage build and test servers and the related environments

• Administer, manage and provide support for Git version control

Your profile

We believe you are a collaborative and curious professional who enjoys working closely with others to make things run smoothly. You take initiative, share ideas, and look for ways to improve how things are done. We believe you are attentive to details and value quality in your work, while keeping a pragmatic mindset. You’re comfortable in a dynamic environment where teamwork and communication are key to success. Fluency in English is required, and Swedish proficiency is a plus. Further, we believe you have:

• A B.Sc. or M.Sc. in engineering or equivalent experience

• 5 years’ experience in software development and/or configuration managementExperience in programming using .NET (PowerShell/C#).

• Experience in continuous integration and deployment (using e.g. Azure DevOps pipelines, GitHub Actions, or similar).

• Experience in Infrastructure as Code (Terraform/Ansible).

• Experience in Windows Server administration/management.

• Excellent communication skills in English.

Lastly, it is not a requirement but highly meritorious if you have experience in:

• Microsoft Visual Studio

• Git

• Automation and process management using Azure DevOps

Our Culture  

Culture at RaySearch is the driving force behind our organization, where everything we do is driven by a shared passion for innovation and the fight against cancer. Our dedication is reflected in our ability to deliver exceptional results, pay close attention to detail, and consistently go the extra mile. Our employees stand out as experts in their field, driven by a relentless focus on solving problems - no matter how complex. At RaySearch, we take pride in leading the way in cancer treatment, leveraging cutting-edge technology to develop innovative solutions that make a real difference in patient care.   

Our Offer   

At RaySearch, we offer a diverse and inclusive work environment, fostering openness, sincerity, and collaboration. Located in Hagastaden, Stockholm's Life Science Hub, our modern and creative workspace includes an in-house gym, yoga, and social activities like ping pong, table football, and regular after-work events. Our bistro serves a fantastic lunch buffet, and we offer morning- and afternoon-fika every day. Our rooftop terrace also provides a stunning 360-degree view of Stockholm, enhancing the work experience. All of this comes attached with a competitive compensation and benefits package.   

Application 

Please apply for the position through the application form below. Selection and interviews will be ongoing. We do not accept applications by email.