Lead Full Stack Developer
Employer · HexaIO
Software developerApplications developerWeb and multimedia developerFull-timeBudapest
At HexaIO we are looking for a hands-on Senior Lead Full Stack Developer for one of our international technology clients. The client is building a multi-party marketplace platform that connects suppliers, partner organizations and logistics providers. You will lead the architecture and write production code, and you will also set engineering standards and mentor other developers.
Tasks
- Lead hands-on development across front-end, back-end services, APIs, integrations and cloud infrastructure.
- Design and evolve the architecture and data models behind matching, search, reporting and analytics.
- Build and improve AI-powered matching between supply and demand on the platform.
- Design scalable REST APIs and integrations with logistics providers, partner platforms and external data sources.
- Develop responsive web workflows and dashboards that track transactions from offer through delivery.
- Set engineering standards through code reviews, automated testing, CI/CD, observability and security practices.
- Work with product, operations and leadership on technical discovery, estimation and solution design.
- Mentor developers, troubleshoot complex production issues and take part in incident response.
Requirements
- At least 7 years of professional software development experience, including substantial hands-on full-stack work
- Strong back-end and service-oriented architecture skills, covering APIs, business logic, data access and distributed systems
- Modern front-end experience building responsive web applications with intuitive user experiences
- Proven experience designing, testing and scaling production-grade REST APIs and integrations
- Solid relational database knowledge, including data modeling and query optimization
- Strong communication skills and fluent English, spoken and written