At Gusto, we're on a mission to grow the small business economy. We handle the hard stuff , payroll, health insurance, 401(k)s, and HR , so owners can focus on their craft and their customers.

With teams in Denver, San Francisco, and New York, we support more than 400,000 small businesses nationwide and are building a workplace that reflects the people we serve. All full-time employees receive competitive base pay, benefits, and equity (RSUs) , because everyone who helps build Gusto should share in its success. Offer amounts are determined by role, level, and location. Learn more about our Total Rewards philosophy.

AI is a fundamental part of how work gets done at Gusto. We expect all team members to actively engage with AI tools relevant to their role and grow their fluency as the technology evolves. AI experience requirements vary by role and will be assessed during the interview process.

About the Role

As the Principal Engineer for the Contractors team, you will play a pivotal role in shaping the future of Gusto’s flagship Payroll product,one of the core pillars of our platform. You will design, build, and scale the capabilities that power essential experiences for our customers. Working collaboratively with product managers, designers, and other engineers, you will deliver impactful features that meet customer needs and elevate user experiences.

As a Gusto Engineer at this level, you’ll guide projects end-to-end,shaping initial feature specifications, driving architectural decisions to bring systems closer to their desired end states, executing on complex initiatives, and maintaining code that powers mission-critical functionality. Beyond technical contributions, you’ll help define and contribute to the broader strategy of how Gusto continues to build and scale its Payroll product.

If you’re excited about solving complex, high-impact problems and want to contribute to a product that touches the lives of millions, we’d love to have you on board!

About the Team

Payroll serves as Gusto's core product, used by each of our 500,000+ customers and contributing significantly to our annual recurring revenue of over $800,000,000. Although we hold the leading market position for SMBs in the US, the market remains highly fragmented, with an estimated 90% still in need of a superior solution. The Contractors team empowers businesses to onboard and pay contractors in 120+ countries with ease and speed. This includes critical functionalities such as payroll setup, preparation, and submission, historical reporting, time tracking, and shift scheduling.

As a key member of this team, you’ll have the opportunity to make a profound impact on both the product and the customers who depend on it daily.

Here’s what you’ll do day-to-day:

• Architect, build, and maintain scalable, secure, and resilient backend systems to support Gusto’s Payroll products.

• Function as a Technical Lead across multiple teams in Pay Group, helping us keep engineers unblocked and deliver high-quality work supporting our long-term goals.

• Help scale one of the largest Ruby/Rails and TypeScript/React applications in the world.

• Collaborate on complex and ambiguous problems with partnerships from Engineering, Product Management, Design, Data Science, Compliance, Operations, and other cross-functional teams.

• Mentor and grow fellow engineers working to create holistic and scalable solutions.

• Drive the product development process from concept to launch, delivering delightful products that make payroll, taxes, and compliance simple and easy.

• Engage in a highly supportive environment working with others to drive productivity and innovation.

Here’s what we're looking for:

• 15+ years of professional software development experience.

• Experience as a tech lead, overseeing and successfully delivering projects that span multiple teams.

• Enthusiasm for a collaborative, test-driven development environment.

• Proven experience building and maintaining resilient backend systems that support customer-facing products, including optimizing existing systems for performance, reliability, and scalability.

• Ability to produce maintainable, structured, and well-documented code.

• Expertise in developing and maintaining RESTful APIs, GraphQL endpoints, and backend services, ensuring seamless integration with frontend systems and third-party services.

• Demonstrated ability in scaling engineering organizations, with a strong focus on individual and team development and mentorship.

• Experience in highly cross-functional environments working on highly complex products.

• Ability to clearly communicate technical complexity and facilitate informed trade-offs among stakeholders.

• Experience using AI tools to build, test, and iterate on products quickly.

• Understanding of how to evaluate AI-driven outputs using clear success criteria.

• A commitment to staying current on emerging backend technologies and AI frameworks and patterns, regularly experimenting with new approaches.

• Willingness to contribute to shared tools or templates that enhance the speed and safety of AI experimentation.

Our cash compensation amount for this role is targeted at $251,000-$309,000 /yr for New York. Final offer amounts are determined by multiple factors, including candidate experience and expertise, and may vary from the amounts listed above.

Gusto has physical office spaces in Denver, San Francisco, and New York City. Employees who are based in those locations will be expected to work from the office on designated days approximately 2-3 days per week (or more depending on role). The same office expectations apply to all Symmetry roles, Gusto's subsidiary, whose physical office is in Scottsdale. Note: The San Francisco office expectations encompass both the San Francisco and San Jose metro areas. When approved to work from a location other than a Gusto office, a secure, reliable, and consistent internet connection is required. This includes non-office days for hybrid employees.

Our customers come from all walks of life and so do we. We hire great people from a wide variety of backgrounds, not just because it's the right thing to do, but because it makes our company stronger. If you share our values and our enthusiasm for small businesses, you will find a home at Gusto.

Gusto is proud to be an equal opportunity employer. We do not discriminate in hiring or any employment decision based on race, color, religion, national origin, age, sex (including pregnancy, childbirth, or related medical conditions), marital status, ancestry, physical or mental disability, genetic information, veteran status, gender identity or expression, sexual orientation, or other applicable legally protected characteristic.

Gusto considers qualified applicants with criminal histories, consistent with applicable federal, state and local law. Gusto is also committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures.

We want to see our candidates perform to the best of their ability. If you require a medical or religious accommodation at any time throughout your candidate journey, please fill out this form and a member of our team will get in touch with you.

Gusto takes security and protection of your personal information very seriously. Please review our Fraudulent Activity Disclaimer. Personal information collected and processed as part of your Gusto application will be subject to Gusto's Applicant Privacy Notice.

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At Synopsys, we drive the innovations that shape the way we live and connect. Our technology is central to the Era of Pervasive Intelligence, from self-driving cars to learning machines. We lead in chip design, verification, and IP integration, empowering the creation of high-performance silicon chips and software content.

You are a skilled engineer with expertise in mechanical engineering, FEA, and software development using C++ and Python. You enjoy tackling complex challenges and transforming simulation data into actionable insights. Your experience with post-processing tools, especially for LS-Dyna, helps you deliver robust and intuitive solutions. You thrive in collaborative environments, communicate effectively, and are motivated to innovate and improve.

Participating in planning, architecture, and research in post-processing features for LS-Dyna. Implementing advanced algorithms for data visualization, interpretation, and reporting within FEA workflows Performs complex development activities that may require extensive analysis in areas including user experience and software design. Employs best practices and helps to maintain them through technical reviews and mentoring. Documenting code, workflows, and user guides to support ongoing maintenance and knowledge sharing. Testing, debugging, and validating software components to ensure reliability and accuracy for end users. Continuously improving the software architecture based on user feedback and evolving industry standards. Works independently

Empowering engineers to efficiently interpret and utilize LS-Dyna simulation results for critical decision-making. Accelerating the development and validation of high-performance mechanical products across industries. Enhancing the accuracy and reliability of post-processing tools, contributing to Synopsys’ reputation for innovation. Driving adoption of Synopsys’ simulation solutions within the global engineering and manufacturing community. Reducing analysis time and improving workflow efficiency for customers through advanced software features. Enabling seamless integration of new technologies and methodologies in simulation post-processing. Supporting the team’s growth by sharing expertise and mentoring colleagues in best practices.

BS in Mechanical, Aeronautical Engineering or related field with 5 years’ experience, MS with 3 years’ experience or PhD with 1 year experience. Proficiency in C++ and Python programming for desktop application development. Experience with Ansys or similar simulation software packages for FEA and post-processing tools. Ability to design intuitive graphical user interfaces and implement data visualization techniques. Excellent problem-solving skills and attention to detail in software development and testing. Familiarity with version control systems and collaborative development environments. Experience with Iso-geometry analysis is a plus.

Innovative and results-driven, with a passion for simulation technology. Collaborative team player who thrives in diverse, multi-disciplinary environments. Effective communicator, capable of translating technical concepts for varied audiences. Adaptable and open to new ideas, embracing continuous learning and improvement. Self-motivated and proactive in tackling complex challenges. Mentor and leader, dedicated to supporting the growth of colleagues and the team.

You will join a dynamic and innovative team focused on developing advanced graphic desktop post-processing tools for LS-Dyna. The team brings together expertise in mechanical engineering, simulation, software development, and user experience design. Collaboration, creativity, and technical excellence are at the heart of the team’s approach, driving impactful solutions for global engineering challenges. Together, you’ll shape the future of simulation post-processing and empower users across industries.

We offer a comprehensive range of health, wellness, and financial benefits to cater to your needs. Our total rewards include both monetary and non-monetary offerings. Your recruiter will provide more details about the salary range and benefits during the hiring process.

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Key responsibilities include:

• Driving RTL-to-GDSII implementation for complex digital IP, ensuring signoff timing and PV closure.
• Leading backend flow development, including PnR, STA, DRC, LVS, and EMIR analysis.
• Collaborating with design, CAD, and cross-functional teams to optimize backend methodologies and resolve technical issues.
• Supporting project execution by troubleshooting timing, congestion, and physical verification challenges.

You will be part of the dynamic Design Support Group (DSG) at Synopsys, a passionate collective of engineers dedicated to delivering world-class backend solutions. Our team thrives on innovation, collaboration, and a shared commitment to technical excellence. We work closely with customers and internal teams, supporting them through every stage of their design journey and continually pushing the boundaries of what's possible in digital backend technology.

As a Staff Engineer, you will have the opportunity to work on cutting-edge projects, develop your technical skills, and contribute to the growth and success of the company. You will be part of a dynamic and supportive team that values innovation, collaboration, and technical excellence.

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