You will get Complete Java Application using Spring Boot & Modern Backend Architecture
Rising Talent
Rising Talent
Project details
Do you need a complete Java application that is scalable, secure, and production-ready?
I’m a Senior Java developer with over 12 years of experience building full-fledged backends and enterprise systems using **Spring Boot, Microservices, JPA/Hibernate, REST APIs, and cloud deployment tools like Docker and AWS.
Whether you're building from scratch, upgrading legacy code, or designing distributed microservices, I’ll deliver clean, testable code fully documented and ready to go live.
🧩 What You Get:
✔️ Java 11/17 Spring Boot application
✔️ End-to-end RESTful APIs with CRUD, Auth, and logging
✔️ Database integration (PostgreSQL, MySQL, MongoDB)
✔️ Dockerized deployment + CI/CD-ready code
✔️ API documentation (Swagger/OpenAPI)
✔️ Role-based security using JWT or OAuth2
✔️ Full Git version control + README instructions
✔️ Testing with JUnit & Mockito
Let’s bring your backend to life, scalable, maintainable, and enterprise-ready.
I’m a Senior Java developer with over 12 years of experience building full-fledged backends and enterprise systems using **Spring Boot, Microservices, JPA/Hibernate, REST APIs, and cloud deployment tools like Docker and AWS.
Whether you're building from scratch, upgrading legacy code, or designing distributed microservices, I’ll deliver clean, testable code fully documented and ready to go live.
🧩 What You Get:
✔️ Java 11/17 Spring Boot application
✔️ End-to-end RESTful APIs with CRUD, Auth, and logging
✔️ Database integration (PostgreSQL, MySQL, MongoDB)
✔️ Dockerized deployment + CI/CD-ready code
✔️ API documentation (Swagger/OpenAPI)
✔️ Role-based security using JWT or OAuth2
✔️ Full Git version control + README instructions
✔️ Testing with JUnit & Mockito
Let’s bring your backend to life, scalable, maintainable, and enterprise-ready.
Programming Languages
JavaCoding Expertise
Localization, Security, DesignWhat's included
| Service Tiers |
Starter
$150
|
Standard
$400
|
Advanced
$1,000
|
|---|---|---|---|
| Delivery Time | 2 days | 7 days | 21 days |
Number of Revisions | 0 | 1 | 1 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | - | - | |
Source Code | - | - |
Frequently asked questions
22 reviews
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EM
Enric M.
May 12, 2026
PKI Implementation Specialist Needed
SA
Sami A.
Mar 14, 2026
Entrust PKI and Thales HSM infrastructure
SD
Semone D.
Feb 13, 2026
Java Card Developer Needed for Secure Smart Card Application
Excellent Java Card developer. Delivered the project efficiently with strong technical expertise and clear communication throughout. Highly recommended.
SK
Sheela K.
Dec 4, 2025
React.js + node.js project, debug current bugs and continue develop for long term
Not recommend. before start contract very friendly, once start this cannot that cannot, need add extra money, and delivery time delay seriously, wont work with him anymore, totally not recommended
FS
Felipe S.
Oct 2, 2025
Cryptographic Design & CP/CPS
Again, this freelancer is very profesional, hight knowledge about the PKI matter, I hope to continue working with him in the future.
About Sanawer
PKI & Digital/eSignature engineer | Java Spring Boot | HSM, CA/RA, AWS
85%
Job Success
Sheikhupura, Pakistan - 1:04 am local time
I am a PKI & Cryptography Engineer with 12+ years of experience building secure, scalable, and enterprise-grade applications using Java Spring Boot, Angular, ReactJS, Cryptography, Certificate Authorities (CA/RA), and Hardware Security Modules (HSMs).
I help organizations build secure enterprise systems, including digital signature platforms, PKI infrastructures, authentication systems, certificate lifecycle management solutions, secure APIs, and full-stack Java applications.
My focus is on security, scalability, performance, and long-term maintainability.
𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐁𝐮𝐢𝐥𝐝 𝐟𝐨𝐫 𝐘𝐨𝐮
𝐏𝐊𝐈 & 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐞 𝐋𝐢𝐟𝐞𝐜𝐲𝐜𝐥𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭
I build secure PKI infrastructures, including Certificate Authorities (CA), Registration Authorities (RA), certificate issuance systems, revocation systems, and enterprise certificate lifecycle management platforms.
𝐃𝐢𝐠𝐢𝐭𝐚𝐥 𝐒𝐢𝐠𝐧𝐚𝐭𝐮𝐫𝐞 & 𝐞𝐒𝐢𝐠𝐧𝐚𝐭𝐮𝐫𝐞 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬
I develop secure digital signing solutions for PDF, XML, and enterprise documents using PAdES, CAdES, XAdES, and S/MIME standards.
𝐇𝐒𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐒𝐞𝐜𝐮𝐫𝐞 𝐊𝐞𝐲 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭
I work with AWS CloudHSM, Thales HSM, and SafeNet HSM for secure key generation, storage, cryptographic operations, signing workflows, and enterprise-grade key management.
𝐉𝐚𝐯𝐚 𝐒𝐩𝐫𝐢𝐧𝐠 𝐁𝐨𝐨𝐭 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
I build secure and scalable backend systems using Java Spring Boot, REST APIs, microservices architecture, secure authentication systems, and enterprise application development practices.
𝐉𝐚𝐯𝐚 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
I develop full-stack enterprise applications using Java Spring Boot, Angular, and ReactJS for secure business platforms, admin portals, dashboards, workflow systems, and enterprise web applications.
𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧 & 𝐈𝐝𝐞𝐧𝐭𝐢𝐭𝐲 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐒𝐲𝐬𝐭𝐞𝐦𝐬
I build authentication and authorization systems using Keycloak, SAML, OAuth2, SSO, Auth0, and WSO2 for secure enterprise access management.
𝐒𝐞𝐜𝐮𝐫𝐞 𝐀𝐏𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧
I create secure REST APIs with authentication, authorization, encryption, digital signatures, access control, and third-party system integrations.
𝐒𝐦𝐚𝐫𝐭 𝐂𝐚𝐫𝐝 & 𝐔𝐒𝐁 𝐓𝐨𝐤𝐞𝐧 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧
I integrate smart cards, USB tokens, cryptographic devices, and hardware-backed authentication systems for secure identity verification and signing solutions.
𝐂𝐥𝐨𝐮𝐝 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 & 𝐃𝐞𝐯𝐎𝐩𝐬
I work with AWS services, including EC2, S3, RDS, Route53, KMS, and CloudHSM, along with Docker, Jenkins, CI/CD pipelines, and secure deployment environments.
𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞
• Strong experience in enterprise security systems
• Deep specialization in PKI and Digital Signature solutions
• Secure and scalable application architecture
• Clear communication and structured development process
• Focus on long-term maintainability and reliability
• Experience with high-security enterprise environments
• Ability to handle both backend and frontend development
If you are looking for a reliable PKI & Digital Signature Engineer or Java Full-Stack Developer who can build secure, scalable, and enterprise-grade applications, send me a message or invite me to your project.
Steps for completing your project
After purchasing the project, send requirements so Sanawer can start the project.
Delivery time starts when Sanawer receives requirements from you.
Sanawer works on your project following the steps below.
Revisions may occur after the delivery date.
What technologies will you use?
Java 17+, Spring Boot, Spring Security, JPA/Hibernate, Docker, and your preferred database (MySQL, PostgreSQL, MongoDB, etc.).