For one of our international clients in the automotive industry, we are looking for an experienced Senior Backend Developer to support a strategic Customer Data Management initiative as an independent contractor.

We welcome applications from individual freelancers and independent consultants based in Croatia. This engagement is for a single senior engineer — we are not looking for team or multi-resource offers at this stage.

About the Project

You will support our client's Customer Data Management initiative, contributing to a modern cloud-native integration platform built around Salesforce.

The project follows an outside-Salesforce architecture, meaning all business logic and integrations are implemented as scalable AWS microservices rather than inside Salesforce itself.

Your deliverables will contribute to a 360° Customer Profile, enabling customer journeys, marketing automation and seamless data synchronization across multiple enterprise systems.

Scope of Work / Deliverables

Design, develop and deliver cloud-native microservices on AWS
Build API-first services to integrate Salesforce with external enterprise systems
Implement integrations using REST APIs, middleware and ETL technologies
Set up and deliver CI/CD pipelines
Develop resilient, scalable cloud applications
Analyze and resolve integration and performance issues
Ensure security, GDPR compliance and data governance standards within delivered work packages
Provide technical documentation for delivered components
Coordinate agreed work packages with Product Owners and Business Analysts

Required Skills

5+ years of backend software development experience
Strong experience with Java, Kotlin, TypeScript, Node.js or Python
Solid experience developing cloud-native applications on AWS
Hands-on experience with Microservice architectures
Experience designing and implementing REST APIs and system integrations
CI/CD knowledge (CodeBuild, CodePipeline, GitLab CI or similar)
Infrastructure as Code (CloudFormation, CDK or Terraform)
Good understanding of software security and secure coding practices
Fluent English (project language)

Nice to Have

Experience integrating Salesforce platforms
Customer Data Management / CRM / Customer 360 experience
ETL or middleware technologies
Automotive or enterprise project experience
Lead Developer or Solution Architecture background
Open Source contributions or GitHub profile

Technologies

AWS (Lambda, ECS, S3, DynamoDB, Aurora)
Java / Kotlin
TypeScript / Node.js
Python
REST APIs
Microservices
CI/CD
CloudFormation
CDK
Terraform

Project Details

Start: ASAP
Duration: 31.12.2026 (possibility for extension)
Estimated workload: up to 100%, based on agreed milestones and deliverables
Location: Remote (Occasionaly workshops in Stuttgart metropolitan area)
Language: English
Engagement: Independent Contractor (freelance/self-employed)
Budget: Rate aligned with CEE nearshore market standards — please indicate your expected hourly rate

Interested?

Please send us:

Your latest CV
Availability
Hourly rate
Short summary of your relevant AWS and backend experience

We look forward to hearing from experienced independent professionals from Croatia.

Keywords

Senior Backend Developer • AWS • Java • Kotlin • TypeScript • Node.js • Python • Cloud Native • Microservices • REST APIs • CI/CD • Salesforce Integration • Customer 360 • Customer Data Management • Automotive • Nearshore • Croatia • Independent Contractor