Full Stack Engineer

Full Stack Engineer (Ruby on Rails, Kotlin, and React) US - East Coast Preferred

Who We Are 

Cobalt was founded on the belief of a fundamental human aspiration: the desire to live better and safer. It all started in 2013, when our founders realized that pentesting can be better. Today our diverse, fully remote team is committed to helping organizations of all sizes with seamless, effective and collaborative Offensive Security Testing that empower organizations to OPERATE FEARLESSLY and INNOVATE SECURELY.

Our customers can start a pentest in as little as 24 hours and integrate with advanced development cycles thanks to the powerful combination of our SaaS platform coupled with an exclusive community of testers known as the Cobalt Core. Accepting just 5% of applicants, the Cobalt Core boasts over 400 closely vetted and highly skilled testers who jointly conduct thousands of tests each year and are at the forefront of identifying and helping remediate risk across a dynamically changing attack surface.

Cobalt is an Equal Opportunity Employer and we strive to build a diverse and inclusive workforce at our company. At Cobalt we aspire to engage with diverse individuals, communities, and organizations in order to continue to nurture our unique rich diverse culture. Join our team, and be your true self to do your best work. 

Description

Join our innovative team as a Full Stack Engineer and play a pivotal role in redefining cybersecurity with Cobalt's PtaaS platform. In this position, you'll leverage your expertise across both front-end and back-end development to deliver impactful features that enhance user experience and performance. Your work will directly influence how businesses globally detect and manage cybersecurity risks. Be part of a culture focused on collaboration, innovation, and continuous learning—building a safer digital future together.

What You'll Do

• Design, develop, and maintain robust and scalable full stack applications using Ruby on Rails and React with TypeScript and CSS-in-JS.
• Write efficient and optimized back-end code interacting with relational databases.
• Build intuitive, responsive front-end interfaces that enhance user experience.
• Collaborate closely with designers, product managers, and engineers to ensure cohesive and high-quality outcomes.
• Participate in code reviews, providing and receiving constructive feedback.
• Troubleshoot and resolve issues related to performance, reliability, and scalability.
• Contribute to continuous improvement of development processes, practices, and tools.
• Stay current with emerging trends and technologies in full stack development.
• Optimize transactional data flows into analytics databases to support advanced analytics and machine learning.

You Have

• Proven experience (3+ years) as a Full Stack Developer, primarily using Ruby on Rails and React with TypeScript.
• Solid understanding and practical experience with relational databases.
• Proficiency in building and consuming RESTful APIs.
• Proficiency in modern front-end frameworks (React, TypeScript, CSS-in-JS).
• Strong debugging and problem-solving skills.
• Excellent written and verbal communication skills in English for effective remote collaboration.
• Commitment to writing clean, maintainable, and efficient code.
• Eagerness to learn new technologies and contribute innovative ideas.

Bonus If You Have

• Experience with Kotlin for back-end services.
• Familiarity with cloud platforms, especially Google Cloud Platform (GCP).
• Experience with Docker, Kubernetes, or other containerization technologies.
• Knowledge of CI/CD pipelines and automated testing frameworks.

Why You Should Join Us

• Grow in a passionate, rapidly expanding industry operating at the forefront of the Pentesting industry 
• Work directly with experienced senior leaders with ongoing mentorship opportunities
• Earn competitive compensation and an attractive equity plan
• Save for the future with a 401(k) program (US) 
• Benefit from medical, dental, vision and life insurance (US)
• Leverage stipends for:
• Wellness
• Work-from-home equipment & wifi
• Learning & development
• Make the most of our flexible, generous paid time off and paid parental leave 

Pay Range Disclosure 

Cobalt is committed to fair and equitable compensation practices. The salary range for this role is ($109,000 - $137,000) per year + equity + benefits. A candidate’s salary is determined by various factors including, but not limited to, relevant work experience, skills, and certifications.  The salary range may differ in other states and may be impacted by proximity to major metropolitan cities. 

Cobalt (the "Company") is an equal opportunity employer, and we want the best available persons for every job. The Company makes employment decisions only based on merit. It is the Company's policy to prohibit discrimination in any employment opportunity (including but not limited to recruitment, employment, promotion, salary increases, benefits, termination and all other terms and conditions of employment) based on race, color, sex, sexual orientation, gender, gender identity, gender expression, genetic information, pregnancy, religious creed, national origin, ancestry, age, physical/mental disability, medical condition, marital/domestic partner status, military and veteran status, height, weight or any other such characteristic protected by federal, state or local law. The Company is committed to complying with all applicable laws and providing equal employment opportunities. This commitment applies to all persons involved in the operations of the Company regardless of where the employee is located and prohibits unlawful discrimination by any employee of the Company.

Cobalt is an E-Verify employer. E-Verify is an Internet-based system operated by the Department of Homeland Security (DHS) in partnership with the Social Security Administration (SSA). It allows participating employers to electronically verify the employment eligibility of their newly hired employees in the United States.