Sr backend developer java/kotlin

At Zallpy, technology is created by curious, collaborative people who care about doing things well. If you enjoy environments where there is room to ask questions, test ideas, learn, and grow together, this opportunity is for you  

We are looking for someone to join a team that thinks big, works with attention to detail, values partnership in everyday work, and shares responsibility. We believe in autonomy, the exchange of different experiences, and building solutions together. 

Here, growing means sharing knowledge, respecting different ways of thinking, and building relationships based on trust while delivering high-quality technology. 

If this way of working resonates with you, come join us. 

What you will do: 

• Develop and evolve backend tools in Kotlin and Java to import, transform, validate, and export interface models.
• Design model-to-model and model-to-text transformations between different interface formats.
• Implement JSON serialization and deserialization driven by schemas, with strong validation and versioning.
• Structure and maintain multi-module Gradle builds, keeping modules, dependencies, and releases organized.
• Write automated tests and keep the tooling reliable and well documented.
• Collaborate with the language and web teams so the models fit the editor and the API Studio platform.
• Take part in technical decisions, code reviews, and continuous improvements to architecture and quality.

What we are looking for: 

• Solid, senior-level experience with Kotlin and Java.
• Experience with multi-module Gradle builds.
• Hands-on experience with model transformation: converting, mapping, or generating structured models (e.g., metamodels, ASTs, schemas, or domain models).
• Experience with schema-aware JSON serialization (e.g., JSON Schema, kotlinx.serialization, Jackson with schema validation).
• Good knowledge of Git and engineering best practices: code review, continuous integration, and automated testing.
• Advanced English for daily communication with an international client.

Nice to have: 

• Experience with Franca IDL or other interface definition languages (e.g., Protobuf, gRPC, OpenAPI).
• Automotive communication protocols and standards: SOME/IP, CAN, LIN, FlexRay, AUTOSAR, PDU, ARXML.
• Automotive tools and libraries such as vsomeip, CommonAPI, DBC files, Vector (CANoe, CANdb++, DaVinci), ETAS, or dSPACE.
• Xtext, EMF, or other language and modeling frameworks.
• Experience building code generators, parsers, or converters between technical formats.

Where you will work:

• This is a 100% remote position.

Hiring models:

• CLT.
• Cooperative.

Benefits of being a Zallper:

 Meal/Food Allowance 
Caju multi-benefit card (credit format), offering flexibility for everyday needs. (CLT only) * 

 Health Plan – Unimed 
No waiting period or copayment for the holder. Possibility to include dependents (children, spouse, or stepchildren) with copayment. (CLT only) * 

 Dental Plan – Uniodonto 
Affordable options to include dependents. (CLT only) * 

 Wellhub 
Access to gyms, physical activities, and wellness programs. 

 Zenklub 
For CLT: Two free sessions per month and special rates for additional sessions. 
For Cooperative/Contractor: Special rates for sessions. 

 Life Insurance 
More security for you and your family. (CLT only) * 

 Childcare Allowance 
Financial support for Zallpers with children from 4 months to 6 years old, according to internal policy. (CLT only) * 

 Baby Zallpy 
A special gift to celebrate the arrival of new Zallpy babies.