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I will design and build scalable spring boot apis in java or kotlin


Aldo Sinanaj
About this gig
Build production-grade backend systems with a senior engineer (10+ years experience)
Are you looking for a senior backend engineer who can design and build scalable, reliable APIs and microservices? I have 10+ years of experience working with Java, Kotlin, Spring Boot, and modern distributed architectures. I focus on clean, maintainable, and production-ready systems not just code that works.
What I offer?
- Design and develop REST APIs using Spring Boot
- Build microservices architectures from scratch
- Implement event-driven systems with Kafka
- Optimize performance and scalability of backend systems
- Debug and fix complex backend issues
- Integrate relational & NoSQL databases
- Cloud-ready development (AWS / Azure)
- Migrate legacy systems into new architecture
Get to know Aldo Sinanaj
Aldo Sinanaj
Software engineer, AWS certified
- FromAlbania
- Member sinceJan 2021
- Avg. response time1 hour
Languages
English, Albanian, Italian
Seasoned backend developer with over 10 years of experience.
I have contributed in designing and implementing event-driven and REST-based microservices on Kubernetes, utilising Spring Boot, Spring Framework, Spring Cloud, Kafka and Postgres.
In the last four years, I have been focused on AWS cloud native development - serverless architecture. I have built a wide range of TypeScript and JavaScript Nodejs microservices and workflows, utilising API-Gateway, Lambda, DynamoDB, S3, Step Functions, EventBridge, SNS, SQS, Amazon Kinesis, Amazon Cognito and more.
Also open for hourly based work.
FAQ
Can you help design the architecture?
Yes, I specialize in designing scalable microservices and event-driven systems.
Do you work with existing projects?
Yes, I can debug, refactor, and improve overall codebase.
Can you deploy to AWS/Azure?
Yes, I can prepare and automate deployment pipelines.
