Senior Fullstack Engineer

About Karbon

Karbon is the global leader in AI-powered practice management software for accounting firms. We provide an award-winning cloud platform that helps tens of thousands of accounting professionals work more efficiently and collaboratively every day. With customers in 40 countries we have grown into a globally distributed team across the US Australia New Zealand Canada the United Kingdom and the Philippines. We are well-funded ranked #1 on G2 growing rapidly and have a people-first culture that is recognized with Great Place To Work certification and on Fortune magazines Best Small Workplaces List.

Karbon is seeking a Senior Full Stack Software Engineer to join the team working on Aider a product within the Karbon portfolio. This is a distinct engineering role with a different tech stack and problem space from Karbons core work in an agile product-focused team to design build and evolve highly interactive web applications. This role is frontend-led with full-stack ownership and 20% focus on backend/API work primarily using have strong autonomy real product ownership and the opportunity to influence how modern engineering practicesincluding AI-assisted developmentare applied within Aider.

About the Role!

Product & Engineering Execution

• Design build and maintain high-quality customer-facing web applications using React and TypeScript with a strong emphasis on frontend experience and performance.
  
  
• Develop and maintain backend services and APIs using contributing to data flows integrations and platform reliability (20% of scope).
  
  
• Translate product requirements into clear technical designs balancing speed quality and long-term maintainability.
  
  
• Own features end to endfrom discovery and implementation through deployment monitoring and iteration.
  
  

User Experience & Growth

• Optimize user experiences through thoughtful UI/UX decisions performance improvements and frontend architecture.
  
  
• Use experimentation techniques such as A/B testing feature flags and funnel analysis to improve acquisition activation and retention.
  
  
• Study user behavior data to identify opportunities for improvement and refinement across the product.
  
  

Quality Collaboration & Ownership

• Work closely with QA Product and Design to ensure features are well-tested reliable and meet user expectations.
  
  
• Participate actively in code reviews technical discussions and architectural decisions.
  
  
• Take ownership of existing systems as well as new development making iterative improvements to keep the product healthy and scalable.
  
  
• Collaborate effectively with a distributed international engineering team in a low-politics high-trust environment.
  
  

AI Automation & Modern Engineering Practices

• Leverage AI-assisted development tools (e.g. for code generation refactoring testing and documentation) to improve development velocity and code quality.
  
  
• Identify opportunities to automate repetitive engineering tasks and improve workflows across development testing and deployment.
  
  
• Apply AI-enabled insights responsibly when analyzing user behavior experiments or product performance.

About You!

We know great engineers come from many backgrounds. You dont need to tick every box below to apply.

• 3 years of professional experience in full-stack software development with a strong frontend focus.
  
  
• Advanced proficiency in React and modern frontend patterns.
  
  
• Experience using TypeScript across frontend and backend codebases.
  
  
• Hands-on experience building APIs and services with .
  
  
• Working knowledge of state management libraries such as MobX (or similar).
  
  
• Experience with PostgreSQL or similar relational databases.
  
  
• Familiarity with microservices architectures and distributed systems.
  
  
• Experience with containerization technologies such as Docker and Kubernetes.
  
  
• Strong understanding of software engineering best practices across the full SDLC (testing CI/CD monitoring).
  
  

Product & Growth Mindset

• Experience with feature flags experimentation and data-driven iteration.
  
  
• Strong analytical and problem-solving skills especially when working with ambiguous product challenges.
  
  
• Passion for understanding user behavior and building software that anticipates user needs.
  
  

Ways of Working

• Comfortable working autonomously with high ownership and accountability.
  
  
• Strong communication and collaboration skills for working across time zones and disciplines.
  
  
• Takes pride in craftsmanship and feels genuine ownership over the impact of their work.
  
  
• Curious creative and excited about building consumer-facing software used globally.
  
  

Education

• Bachelors degree in Computer Science Mathematics Statistics Data Science or equivalent practical experience.

Why Work at Karbon

• Gain global experience across the USA Australia New Zealand UK Canada and the Philippines
• 4 weeks annual leave plus 5 extra Karbon Days off a year
• Flexible working environment
• Work with (and learn from) an experienced high-performing team
• Be part of a fast-growing company that firmly believes in promoting high performers from within
• A collaborative team-oriented culture that embraces diversity invests in development and provides consistent feedback
• Generous parental leave

Karbon embraces diversity and inclusion aligning with our values as a business. Research has shown that women and underrepresented groups are less likely to apply to jobs unless they meet every single criteria. If youve made it this far in the job description but your past experience doesnt perfectly align we do encourage you to still apply. You could still be the right person for the role!

We recruit and reward people based on capability and performance. We dont discriminate based on race gender sexual orientation gender identity or expression lifestyle age educational background national origin religion physical or cognitive ability and other diversity dimensions that may hinder inclusion in the organization.

Generally if you are a good person we want to talk to you.

If there are any adjustments or accommodations that we can make to assist you during the recruitment process and your journey at Karbon contact us at for a confidential discussion.

At this time we request that agency referrals are not submitted for this position. We appreciate your understanding and encourage direct applications from interested candidates. Thank you!