Headquarters: New York
URL: http://summed.com
Full Stack Engineer
We’re looking for a Full Stack Engineer who can build across the entire stack and has hands-on experience with AI coding tools. You’ll be working for a new SaaS product that simplifies accounting tax processes. You’ll own features end-to-end, from database to UI, and help integrate AI capabilities into our product. If you’re comfortable jumping between frontend and backend and enjoy working with modern AI tools and APIs, this is the role for you.
The management team is primarily in USA including a product manager so you’ll need to be available at least some USA business hours (east cost time zone). The rest of the management team is in Sydney, Australia which is where the interviewing team is based.
About the Role
You’ll be building and shipping features that tax accountants interact with every day. This means writing clean, maintainable code on both the frontend and backend, collaborating closely with product and design, and bringing AI-powered features to life. We need someone who can move fast, solve problems independently, and deliver work that just works.
Key Responsibilities
• Build and maintain features across the full stack, from frontend interfaces to backend services and databases
• Design and implement RESTful APIs and integrate with third-party services
• Develop responsive, performant user interfaces with modern frontend frameworks
• Integrate AI/ML capabilities into the product, including working with LLMs, embeddings, and AI APIs
• Write clean, tested, and well-documented code
• Participate in code reviews and contribute to engineering best practices
• Collaborate with product and design to turn requirements into technical solutions
• Debug and resolve issues across the stack
• Optimise application performance and scalability
• Stay current with emerging technologies, particularly in the AI space
Requirements
• 4+ years of professional software development experience
• Strong proficiency in frontend development (React, Vue, or similar frameworks)
• Strong proficiency in backend development (Node.js, Python, Go, or similar)
• Experience with relational databases (PostgreSQL, MySQL) and NoSQL databases
• Hands-on experience with AI/ML integration, such as working with OpenAI, Anthropic, or similar APIs
• Understanding of prompt engineering, embeddings, vector databases, or RAG architectures
• Experience with cloud platforms (AWS, GCP, or Azure)
• Familiarity with CI/CD pipelines and DevOps practices
• Strong problem-solving skills and ability to work independently
• Good communication skills and ability to collaborate with non-technical stakeholders
• Build and ship features rapidly using AI-assisted workflows (Claude Code, Cursor, Copilot)
Nice to Have
• Experience fine-tuning models or working with ML pipelines
• Familiarity with LangChain, LlamaIndex, or similar AI frameworks
• Contributions to open-source projects and a passion for staying on top of the latest advancements in AI coding and development.
• Experience in a startup or fast-paced environment
What We Offer
• Competitive salary
• Opportunity to work on cutting-edge AI-powered products
• Collaborative, low-ego team culture
• Flexible working arrangements
• Room to grow and take on more responsibility
