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I will develop your full stack web application or java spring boot backend with
Crescent K
About this gig
Are you looking for a senior developer to build your entire web application from scratch or a rock-solid backend API? You're in the right place.
I'm a Senior Software Engineer with 11+ years of experience delivering full stack enterprise systems for national banks, government institutions, and telecom companies.
What I can build for you: Full stack web applications end to end Spring Boot / Spring MVC REST & SOAP APIs Microservices architecture from scratch Angular or Vue.js frontends Secure authentication (Keycloak, OAuth2, JWT) AWS deployment & Docker containerisation Database design (Oracle, MySQL, PostgreSQL)
Why choose me: ⭐ 11+ years professional experience ⭐ AWS Certified Solutions Architect ⭐ Built systems used by central banks & government authorities ⭐ Based in Sydney, Australia easy for AU/NZ clients ⭐ Full SDLC: design develop deploy support
Message me before ordering so we can discuss your project scope!
Get to know Crescent K
Crescent K
Senior Software Engineer
- FromAustralia
- Member sinceMay 2026
Languages
English, Sinhala
I am a Senior Java Engineer with 11+ years building high-volume enterprise systems. I specialize in Spring Boot microservices, complex system integrations, and secure backend engineering.
My Portfolio
FAQ
What technologies do you use?
I primarily use Java Spring Boot for backend, Angular or Vue.js for frontend, and MySQL/PostgreSQL for databases. I also work with Docker, AWS, and REST/SOAP APIs depending on project needs.
Can you work with my existing codebase?
Yes. If you have an existing project, share the repository and I'll review it before we start. I'm experienced with legacy systems and can extend or refactor existing code cleanly.
Do I own the source code after delivery?
Absolutely. Full source code is included in every package and you retain complete ownership upon delivery.
What if I don't know exactly what I need?
That's fine — message me before ordering. I'll ask the right questions to scope your project accurately and recommend the best package. Ordering the wrong package wastes both our time.
Do you sign NDAs or work under confidentiality?
Yes. I understand enterprise and government clients often require confidentiality. I'm happy to sign an NDA before work begins — just mention it when you message me.
What do you need from me to start?
A clear description of what you want to build, any existing designs or wireframes, your preferred tech stack (if any), and access to your server or repository if applicable. The more detail upfront, the faster I can deliver.
