Senior Full-Stack Software Engineer

Aiwyn is a fast-growing SaaS company transforming the way accounting firms manage the revenue lifecycle. They are seeking a Senior Full-Stack Software Engineer to take end-to-end ownership of features, from backend services to user interfaces, while leveraging AI to enhance development processes.

Responsibilities:

• Design and implement features end-to-end, from robust backend services and APIs in Java/Kotlin and Spring Boot to polished, responsive user interfaces in Angular
• Own the full lifecycle of features - database schema to UI component - while maintaining high code quality standards and contributing to architectural decisions
• Work within agile product teams to deliver high-quality features, participate in code reviews, and contribute to technical discussions across both backend and frontend
• Partner with designers and product managers to translate requirements into complete, working solutions
• Tackle complex technical problems that span the full stack, propose innovative solutions and continuously improve our development practices, tooling, and user experience
• Leverage AI coding assistants and tools to accelerate development velocity across the full stack
• Help establish and refine AI-assisted development workflows, prompting strategies, and best practices for the team
• Evaluate and adopt emerging AI tools that improve code quality, testing, and developer productivity
• Contribute to a culture where AI is a natural part of the engineering workflow, not an afterthought

Requirements:

• Full-Stack Mindset – A genuine desire to work across the entire stack, not just tolerance for it. You take pride in delivering complete features and are eager to deepen your skills on both sides
• Strong Foundation in One, Proficiency in the Other – Deep expertise in either Java/Kotlin and Spring Boot or Angular and TypeScript, with demonstrated hands-on experience in the other. You bring senior-level strength to your primary domain and solid working ability across the stack
• Technical Excellence – Strong understanding of OOP, functional programming, software design principles, and modern architecture patterns. Ability to write clean, performant, and maintainable code in both backend and frontend contexts
• Problem-Solving Skills – Demonstrated ability to analyze and solve complex technical problems that span multiple layers of the system, with a keen eye for identifying potential issues and implementing effective solutions
• Quality Focus – Strong commitment to code quality, testing practices, and software development best practices across the stack. Experience writing well-tested, maintainable code
• Technical Communication – Ability to clearly communicate technical concepts and decisions, participate effectively in code reviews, mentor other engineers, and contribute to a positive team culture
• System Understanding – Ability to understand system architecture and how frontend and backend components interact, with experience in building and maintaining distributed systems
• Experience building solutions that leverage LLMs
• Experience building software with agentic AI
• Experience with PostgreSQL and BigQuery
• Experience with Google Cloud Platform services
• Familiarity with multi-tenant SaaS architectures
• Expertise with NGXS or similar state management solutions
• Experience building enterprise-grade component libraries with Angular Material
• Experience with GraphQL
• Experience with data pipelines and ETL processes
• Experience with continuous integration and deployment practices
• Knowledge of modern build tools and frontend optimization techniques
• Background in contributing to system architecture discussions
• Track record of mentoring junior developers
• Track record of successful projects in fast-paced environments