Senior Software Engineer - Fullstack

Who is SimSpace:

SimSpace launched in 2015 with a singular purpose – addressing the most urgent and sophisticated cybersecurity challenges to reduce risk for our most vulnerable and valuable infrastructure. The organizations around the world that we depend on every day to keep our loved ones safe and secure. Our healthcare facilities, schools, financial institutions, transit centers, grocery stores, and workplaces just to name a few. To deliver global resiliency, we provide an elite cyber range platform to curate unassailable cyber defenses, data driven decisions, cutting edge training labs, live attack scenarios, and extensive individual and dynamic team readiness training. 

SimSpace works as OneTeam to elevate humanity around the world. We are committed to continuously improving and delivering a cultivated member experience whether that is accomplished through focusing on supporting our client’s teams or our own mission driven SimSpacers. 

We are an international company headquartered in Boston's Fort Point in the U.S. If you are interested in elevating the technology and creative solutions necessary to secure and safeguard our future while working alongside others who share your passion for purpose and development, we want to meet you!

Why should you choose a career at SimSpace?

We are an organization that is focused on building our culture and mindfully enhancing our atmosphere everyday 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.

Our core values:

• Serve to Protect – We provide safe space, deliver on the mission, and elevate humanity
• Acquire Understanding – We seek and provide clarity 10x, cultivate comprehension, and believe information goes both all ways
• Operate as Innovators – We stay curious, practice consistency over intensity, and continue to be the change we need in the world
• Teamwork Without Borders – We are never alone, we solve for all, and keep people at the heart of everything we do

SimSpace is looking for a Senior Software Engineer to join our team and drive the development of AI-powered services. This role requires a strong background in full-stack software engineering with an eagerness to dive into the world of AI tooling and APIs. While direct experience with GenAI or AgenticAI platforms is a plus, the ideal candidate is someone excited to explore and integrate AI technologies (e.g., GPT-like models, APIs, and machine learning systems) into real-world applications. You will play a key role in developing, fine-tuning, and deploying machine learning models while ensuring seamless integration across the full stack. A commitment to quick iterations and working within the full Software Development Lifecycle (SDLC) is essential for this position.

What will you be doing as a Senior Software Engineer at SimSpace?

• Design, develop, and integrate AI-powered services into real-world applications using GenAI and AgenticAI APIs (e.g., ChatGPT, Vertex AI, AWS AI, Claude,
• Perplexity, CrewAI, Anthropic's models, Jasper, Cohere, Hugging Face, OpenAI, and other relevant platforms)
  
• Leverage full-stack engineering skills to build scalable, reliable software, including both backend and frontend components
  
• Lead the implementation of systems used to continuously improve model performance based on real-world feedback
  
• Manage the full-stack development of AI services, working across the backend, frontend, and APIs to ensure seamless integration and performance
  
• Collaborate with cross-functional teams to define, develop, and deploy AI models that support business goals
  
• Iterate quickly and implement agile development practices to ensure continuous delivery of high-quality software
  
• Own the SDLC for AI service projects, from requirements gathering to design, testing, and deployment
  
• Continuously learn about new AI technologies, staying at the forefront of industry advancements and integrating them into development processes
  
• Troubleshoot, optimize, and maintain AI-powered systems, ensuring robustness and scalability
  
• Work iteratively in an agile environment, delivering high-quality software in quick cycles
  
• Contribute to the overall architecture of AI systems while ensuring good coding practices, testing, and documentation
•  

What are the qualifications to apply? To be successful as a Senior Software Engineer, you need to have:

• 5+ years of experience in full-stack software engineering, with expertise in both frontend and backend technologies
  
• Comfortable with building and integrating APIs, particularly in complex, distributed systems
  
• Familiarity with machine learning concepts or AI tools and platforms (e.g., GenAI, AgenticAI, GPT-like models, APIs, etc.)
  
• A strong desire to work with AI and machine learning technologies and the ability to quickly adapt to new tools and platforms
  
• Proficiency in programming languages such as Kotlin, Java, C#, Python, or other relevant technologies
  
• Experience with cloud services, containerization (e.g., Docker), and deployment frameworks
  
• Familiarity with CI/CD pipelines and agile development practices
  
• Strong problem-solving skills, with an ability to quickly identify and resolve technical issues
  
• Excellent communication skills and the ability to collaborate effectively in a cross-functional team

Preferred Qualifications

• Experience with large-scale AI applications and systems
  
• Familiarity with the latest trends in AI research and model training techniques
  
• Interest in staying up-to-date with the latest developments in AI research and models
  
• Experience with big data systems and scalable architectures for AI applications
  
• Experience working in an agile development environment
  

• Compensation. Base salary range: $150,000 - $210,000, reflecting our confidence in your expertise and impact, with the opportunity for annual 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.

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 is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws. We are committed to providing an inclusive and welcoming environment for all members of our staff, clients, volunteers, subcontractors, vendors, and clients.

Research shows that women and people from underrepresented groups only apply to jobs if they meet all of the qualifications. However, no one ever meets 100% of the qualifications. SimSpace encourages you to break that statistic and to apply. We look forward to your application!

We also consider qualified applicants regardless of criminal histories, in accordance with applicable law. We are committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or accommodation due to a disability, please contact careers@simspace.com.

SimSpace does not accept unsolicited resumes from employment agencies.

Actual compensation for the position is based on a variety of factors, including, but not limited to affordability, skills, qualifications and experience, and may vary from the range.