Senior UX Designer

SimSpace is seeking a Senior UX Designer to help shape the future of our application suite. This person will reside in the Boston area, mainly work remotely and at times join the team for meetings in-person.

This role is ideal for a designer who thrives in complex domains, enjoys turning ambiguity into clarity, and can confidently partner with Product Management and Engineering to define and deliver exceptional user experiences.

Success in this role requires strong systems thinking, a customer-centered mindset, and the ability to balance rapid exploration with thoughtful execution. You'll work across challenging enterprise workflows, contribute to our evolving design system, and help drive usability and consistency throughout the application.

What You'll Do

• Partner closely with Product Managers and Engineers to discover, define, and deliver valuable customer solutions.
• Translate complex workflows, systems, and technical concepts into intuitive and effective user experiences.
• Use rapid, low-fidelity exploration techniques-including sketches, diagrams, workflows, and prototypes-to evaluate ideas, align stakeholders, and accelerate decision-making.
• Design end-to-end experiences through information architecture, user flows, wireframes, prototypes, and high-fidelity designs.
• Conduct user research, usability testing, and design validation activities to inform design decisions.
• Independently lead UX initiatives and drive solutions for complex product challenges.
• Apply established design patterns and contribute to the evolution of our design system to improve consistency, accessibility, and scalability.
• Collaborate with fellow designers through critique, feedback, and shared problem-solving.
• Present design work and rationale clearly to stakeholders, leadership, and cross-functional teams.
• Leverage AI-powered tools and emerging technologies to accelerate research, ideation, design exploration, documentation, and execution.

What Success Looks Like

• You are comfortable working through ambiguity and helping teams find clarity.
• You think in systems, workflows, and outcomes-not just screens.
• You know when to leverage existing design patterns and when to evolve them.
• You use lightweight artifacts to explore ideas quickly and drive alignment.
• You build trusted partnerships with Product and Engineering and actively contribute to product direction.
• You embrace AI as a practical tool for improving productivity, quality, and decision-making.
• You care deeply about customer outcomes and continuously seek opportunities to improve the user experience.

• Experience designing complex enterprise software products.
• Strong portfolio demonstrating systems thinking, workflow design, and problem-solving ability.
• Experience working within established design systems and pattern libraries.
• Ability to balance customer needs, business goals, technical constraints, accessibility requirements, and platform consistency.
• Expertise with Figma and modern UX design and prototyping tools.
• Experience conducting user research and validating design decisions through customer feedback.
• Strong communication, facilitation, and stakeholder management skills.
• Experience collaborating closely with Product Management and Engineering throughout the product development lifecycle.
• Demonstrated ability to drive work independently and navigate ambiguity.
• Experience using AI tools as part of everyday design, research, or problem-solving workflows.

Preferred

• Experience contributing to or evolving a design system.
• Experience in cybersecurity, networking, infrastructure, developer tools, SaaS platforms, or other highly technical domains.
• Familiarity with accessibility standards and inclusive design practices.
• Degree in Design, Human-Computer Interaction, Human Factors, Psychology, or a related discipline.

Pulled from the full job description

• Referral program
• Pet insurance
• Parental leave
• 401(k)
• Health insurance
• Vision insurance
• Dental insurance, We're proud to offer a competitive and comprehensive package designed to support your well-being, growth, and success:
• Compensation. Base salary range: $155,000 - $220,000 reflecting our confidence in your expertise and impact, with the opportunity for bonuses tied to company performance and individual contributions.
• Health & Wellness. Comprehensive medical, dental, and vision benefits, plus savings plans-coverage starts on day one!
• Mental Health Support. Access to company-paid counseling, coaching, and resources for you and your family through Spring Health.
• Financial Well-Being. Plan for your future with a 401(k)-retirement savings plan featuring a company match.
• Flexible Time Off. Take the time you need with unlimited vacation and dedicated health & wellness days. SimSpace provides flexible solutions to meet the diverse work-life needs of team members.
• Parental Leave. Paid leave plans to support you and your loved ones during life's most important moments.
• Ownership Opportunities. Equity stock options at hire, with annual performance-based grants-become an invested stakeholder in our shared success.
• Referral Rewards. Earn $1,500-$3,500 for every qualified hire through our employee referral program.
• Peloton Interactive Wellness Program. Full- and partial- subsidized membership plans and equipment discounts to help you reach your personalized fitness goals.
• Continuous Learning. Access a LinkedIn Learning membership to prioritize your personal and professional development.
• Social Connections. Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community.
• Extra Perks. Legal plan coverage, pet insurance, wellness reimbursements, and more to simplify life's details.

Join SimSpace and enjoy benefits that enhance your career, health, and happiness!

SimSpace is an Equal Opportunity Employer:

In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire.

SimSpace serves as an AI Proving Ground where organizations can confidently train, test, and outmaneuver adversaries in any environment. Trusted by allied governments, militaries, enterprises, and research institutions worldwide, SimSpace enables adaptive, AI-ready defenses that stay ahead of evolving threats. Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory, the platform unifies training, testing, and validation in a realistic, live-fire simulation-helping teams evaluate security investments, optimize performance, and compress cyber readiness cycles from months to days. Why join SimSpace? We are an organization that is focused on building our culture and mindfully enhancing our atmosphere every day which is why we have collaborated on an integral value system. Our governing philosophy of being Human Centered is deeply embedded within our value system. We apply this philosophy to every one of our internal team members, external clients, and their customers. How Do We Work? We believe that people are at the center of everything we do. SimSpace fosters a culture of continuous learning, curiosity, and professional growth. That belief shows up in action: in-house training, internal and external learning platforms, cyber conferences, industry events, and dedicated time for skill development. Our people are empowered to shape their careers - and it shows. Year over year, SimSpace consistently outperforms industry benchmarks in internal mobility, promotions, and total rewards growth. Who Thrives Here? We are a team of innovators, protectors, and problem-solvers. We believe diversity of thought and experience fuels better solutions, and we're committed to building teams that reflect the communities we serve. Whether you're remote or office-based, you'll collaborate with talented colleagues across departments and time zones, united by the mission to create a safer digital world.