About our clietnt company

A client of SimilarDev is a venture-backed fintech product company building software for merchants and enterprise customers operating in the payments space. The business focuses on automating chargeback and dispute management using AI-driven technology and serves globally recognized e-commerce and digital commerce brands.

About the product

The product helps merchants manage chargebacks and disputes more efficiently through automation, data-driven decision-making, and customized evidence generation. It combines chargeback operations, workflow automation, analytics, and platform capabilities in an environment where accuracy, speed, and reliability matter at scale.

Who we are looking for

We are looking for a Senior Full Stack Developer based in Bucharest, Romania, with 5+ years of hands-on software development experience and strong expertise in Node.js and React. You should be comfortable building end-to-end in a modern product environment and working with technologies such as Next.js, SQL, and NoSQL databases, REST APIs, asynchronous execution environments, microservices, Docker, Kubernetes, and AWS. Strong English communication skills, a collaborative mindset, and a clear focus on quality and continuous improvement are important for success in this role.

Requirements

Must-have

• 5+ years of hands-on full-stack software development experience
• Strong experience with Node.js and React
• Experience with Nest.js or Next.js is an advantage
• Experience with SQL and NoSQL databases such as MongoDB, PostgreSQL, Redis, or similar
• Hands-on experience with RESTful APIs and asynchronous execution environments
• Familiarity with microservices architecture and containerization, including Docker and Kubernetes
• Experience with cloud platforms, ideally AWS
• Strong communication skills in English
• A collaborative mindset and ability to work effectively as part of a team
• A strong focus on quality and continuous improvement
• Experience with modern AI development tools such as Cursor, Copilot, or similar

Nice-to-have

• Experience with event-driven systems
• Experience working in a monorepo environment such as Nx
• Experience with n8n or other workflow automation tools
• Previous experience working with high-scale production systems

Responsibilities

• Own features end-to-end, from early concept through implementation, deployment, and production monitoring
• Build functionality ranging from AI-powered evidence generation to real-time merchant-facing insights
• Work across a modern stack that includes Node.js, Next.js, SQL and NoSQL databases, Kubernetes, and AWS
• Contribute to a large microservices-based environment with 200+ services
• Process high-stakes data at scale while maintaining a strong focus on accuracy and reliability
• Collaborate closely with product, QA, DevOps, and engineering teammates to deliver production-ready solutions

What the company offers

• A hybrid role based in Bucharest, Romania
• The opportunity to join a product-driven engineering team working on technology used by major global brands
• The chance to own meaningful features with visible production impact in a high-scale environment