ProfitTree Senior Fullstack Software Engineer

TL;DR

Senior Fullstack Engineer (SolidJS/Python): Building and expanding a vertical SaaS platform for Etsy sellers with an accent on end-to-end product features, scalable backend services, and data-intensive systems. Focus on designing APIs, async workflows, frontend interfaces, and infrastructure improvements using modern AI-assisted development.

Location: Fully remote. European timezone (CET ±2h), based within the European Economic Area.

Company

hirify.global deploys high-performing engineering teams to partner companies like ProfitTree, a growing SaaS platform that helps Etsy sellers analyze profitability, optimize decisions, and scale operations.

What you will do

• Build and ship new product features across frontend and backend, owning projects from design to production.
• Develop responsive interfaces with SolidJS and TypeScript, consuming APIs and refining UX.
• Design APIs with Python and FastAPI, build background jobs and automations with Celery.
• Work with MongoDB and ClickHouse for scalable data systems and analytics.
• Maintain production environments, deployment pipelines, observability, and infrastructure with Kubernetes and Terraform.

Requirements

• Fluent English with strong written and verbal communication.
• Senior-level experience building production web applications.
• Strong frontend skills with TypeScript and modern component frameworks like SolidJS.
• Strong backend skills with Python, FastAPI, and API development.
• Proven experience with Celery, MongoDB, and data-heavy applications.
• Comfortable across fullstack, with Kubernetes familiarity and product mindset.
• Ownership mentality, pragmatism, and positive attitude toward AI-driven development.

Nice to have

• Experience with analytical databases like ClickHouse.

Culture & Benefits

• Fully remote with significant autonomy and technical freedom.
• Competitive compensation based on experience.
• AI-forward workflows using tools like Claude Code for productivity.
• Breadth of work across frontend, backend, infra, and product thinking.
• Fast-paced environment valuing output, ownership, and learning speed over credentials.
• No politics, focus on craftsmanship, clarity, and meaningful impact.