Freelance Remote Frontend Developer Jobs in Derry, NH

About FullStack
FullStack is one of the fastest-growing software consultancy companies in the Americas. We deliver transformational digital solutions to top global companies and Silicon Valley startups. As an employee-first company, we focus on hiring the most talented software designers and developers by creating a positive, respectful, and supportive work environment where they can achieve their greatest potential.
We're most proud of:

• Offering life-changing career opportunities to talented software professionals across the Americas.
• Building highly-skilled software development teams for hundreds of the world's greatest companies.
• Having delivered hundreds of successful custom software solutions, which have positively impacted the lives and careers of millions of users.
• Our 4.2-star rating on GlassDoor.
• Our client Net Promoter Score of 68, twice the industry average.

The Position
We're looking to hire an Agentic Software Engineer (Google Antigravity) to join our team. You'll work with one of our incredible product teams to build and deliver a product to our clients.
What We Are Looking For

• 5+ years of professional software development experience with a deep understanding of full-stack architectures (e.g., Java, Python, C#, React, Node, etc.).
• Deep experience using Google Antigravity as a primary development environment to coordinate AI-driven implementation across large, multi-file systems while maintaining architectural oversight.
• Experience delivering production software where AI systems generate the majority of implementation code.
• Strong context engineering skills, including structuring codebases, specifications, and documentation to produce reliable, context-efficient AI output.
• Ability to translate complex product requirements into machine-executable, AI-friendly specifications.
• Experience designing AI-first development workflows from specification through deployment.
• Ability to systematically improve AI-generated output through structured iteration and feedback loops.
• Comfort working across multiple stacks, using AI to deliver high-quality, production-ready systems.
• Experience operating across frontend, backend, and infrastructure in AI-accelerated environments.
• Disciplined human-in-the-loop review practices, with risk-adjusted validation for high-impact or safety-critical flows.
• Strong curiosity and initiative in evaluating and adopting emerging AI-native engineering practices.
• Advanced understanding of Agile methodologies and Lean principles and participation in team ceremonies as well as asynchronous work.
• Advanced English is required.
• Successful completion of a four-year college degree is required.
• A positive mindset and a can-do attitude.
• Ability to identify with the goals of FullStack's clients and dedicate yourself to delivering on commitments.
• Ability to consistently work 40 hours per week.

What We Offer

• Competitive Salary.
• Paid Time Off (vacation, sick leave, parental leave, and holidays).
• 100% remote work.
• The ability to work with leading startups and Fortune 500 companies.
• Health, dental, and vision insurance.
• 401(k) w/ 4% match.
• Ample opportunity for career advancement.
• Continuing education opportunities.

FullStack is proud to be an equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status.
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