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
(18)
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This project doesn't have any reviews.
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
Senior PKI & eSignature Engineer | Java Spring Boot | HSM, CA/RA & AWS
90%
Job Success
Sheikhupura, Pakistan - 9:44 am local time
I specialize in 𝐏𝐊𝐈 & 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐞 𝐋𝐢𝐟𝐞𝐜𝐲𝐜𝐥𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭, including 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐞 𝐀𝐮𝐭𝐡𝐨𝐫𝐢𝐭𝐢𝐞𝐬 (𝐂𝐀), 𝐑𝐞𝐠𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧 𝐀𝐮𝐭𝐡𝐨𝐫𝐢𝐭𝐢𝐞𝐬 (𝐑𝐀), certificate issuance, renewal, validation, revocation, CRL, OCSP, trust chains, certificate provisioning, and automated certificate lifecycle workflows. Whether you need a new PKI architecture, an existing CA/RA integration, automated certificate operations, or modernization of a certificate management platform, I can design and implement the solution around your security and business requirements.
For 𝐃𝐢𝐠𝐢𝐭𝐚𝐥 𝐒𝐢𝐠𝐧𝐚𝐭𝐮𝐫𝐞 & 𝐞𝐒𝐢𝐠𝐧𝐚𝐭𝐮𝐫𝐞 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬, I develop secure signing workflows for PDF, XML, enterprise documents, transactions, and business processes. I work with 𝐏𝐀𝐝𝐄𝐒, 𝐂𝐀𝐝𝐄𝐒, 𝐗𝐀𝐝𝐄𝐒, and 𝐒/𝐌𝐈𝐌𝐄, including signature creation, validation, certificate verification, timestamping, document integrity, signing APIs, and secure verification workflows. I can build end-to-end signing platforms or integrate digital signing into your existing enterprise applications.
For 𝐇𝐒𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐒𝐞𝐜𝐮𝐫𝐞 𝐊𝐞𝐲 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭, I work with 𝐀𝐖𝐒 𝐂𝐥𝐨𝐮𝐝𝐇𝐒𝐌, 𝐓𝐡𝐚𝐥𝐞𝐬 𝐇𝐒𝐌, and 𝐒𝐚𝐟𝐞𝐍𝐞𝐭 𝐇𝐒𝐌 for secure key generation, protected key storage, cryptographic operations, signing, encryption/decryption, certificate protection, and hardware-backed security. I understand how to connect HSM-backed cryptography with Java services, PKI platforms, signing systems, and enterprise workflows while keeping sensitive keys protected.
On the application side, I build secure and scalable 𝐉𝐚𝐯𝐚 𝐒𝐩𝐫𝐢𝐧𝐠 𝐁𝐨𝐨𝐭 𝐁𝐚𝐜𝐤𝐞𝐧𝐝𝐬 using REST APIs, microservices, secure business logic, authentication, authorization, database integrations, asynchronous processing, logging, monitoring, and production-ready architecture. I also provide 𝐉𝐚𝐯𝐚 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 using 𝐀𝐧𝐠𝐮𝐥𝐚𝐫 and 𝐑𝐞𝐚𝐜𝐭𝐉𝐒 for enterprise dashboards, admin portals, certificate management interfaces, signing portals, workflow systems, and secure business applications.
I also specialize in 𝐈𝐝𝐞𝐧𝐭𝐢𝐭𝐲, 𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧 & 𝐀𝐮𝐭𝐡𝐨𝐫𝐢𝐳𝐚𝐭𝐢𝐨𝐧, implementing enterprise access management with 𝐊𝐞𝐲𝐜𝐥𝐨𝐚𝐤, 𝐎𝐀𝐮𝐭𝐡𝟐, 𝐒𝐀𝐌𝐋, 𝐒𝐒𝐎, 𝐀𝐮𝐭𝐡𝟎, and 𝐖𝐒𝐎𝟐. This includes role-based access control, identity federation, token-based authentication, secure sessions, service authentication, and integration with enterprise identity providers. I can connect these identity workflows with PKI-based authentication, digital certificates, signing services, and existing enterprise systems.
For 𝐒𝐞𝐜𝐮𝐫𝐞 𝐀𝐏𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧, I create APIs with strong authentication, authorization, encryption, digital signatures, access controls, certificate-based security, and third-party integrations. I also work with 𝐒𝐦𝐚𝐫𝐭 𝐂𝐚𝐫𝐝𝐬, 𝐔𝐒𝐁 𝐓𝐨𝐤𝐞𝐧𝐬, and cryptographic devices for secure identity verification, private-key operations, certificate-based authentication, and signing workflows.
My cloud and deployment expertise includes 𝐀𝐖𝐒 services such as 𝐄𝐂𝟐, 𝐒𝟑, 𝐑𝐃𝐒, 𝐑𝐨𝐮𝐭𝐞𝟓𝟑, 𝐊𝐌𝐒, and 𝐂𝐥𝐨𝐮𝐝𝐇𝐒𝐌, along with 𝐃𝐨𝐜𝐤𝐞𝐫, 𝐉𝐞𝐧𝐤𝐢𝐧𝐬, CI/CD pipelines, secure deployments, monitoring, secrets management, and production infrastructure. I approach security as part of the architecture rather than an afterthought, with emphasis on scalability, reliability, maintainability, and clean integration.
My core expertise includes 𝐏𝐊𝐈 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞, 𝐂𝐀/𝐑𝐀, 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭, 𝐃𝐢𝐠𝐢𝐭𝐚𝐥 𝐒𝐢𝐠𝐧𝐚𝐭𝐮𝐫𝐞𝐬, 𝐞𝐒𝐢𝐠𝐧𝐚𝐭𝐮𝐫𝐞, 𝐇𝐒𝐌, 𝐂𝐫𝐲𝐩𝐭𝐨𝐠𝐫𝐚𝐩𝐡𝐲, 𝐉𝐚𝐯𝐚, 𝐒𝐩𝐫𝐢𝐧𝐠 𝐁𝐨𝐨𝐭, 𝐑𝐄𝐒𝐓 𝐀𝐏𝐈𝐬, 𝐌𝐢𝐜𝐫𝐨𝐬𝐞𝐫𝐯𝐢𝐜𝐞𝐬, 𝐊𝐞𝐲𝐜𝐥𝐨𝐚𝐤, 𝐎𝐀𝐮𝐭𝐡𝟐, 𝐒𝐀𝐌𝐋, 𝐒𝐒𝐎, 𝐀𝐖𝐒, 𝐀𝐧𝐠𝐮𝐥𝐚𝐫, 𝐑𝐞𝐚𝐜𝐭𝐉𝐒, 𝐃𝐨𝐜𝐤𝐞𝐫, and 𝐂𝐈/𝐂𝐃.
#PKI #DigitalSignature #eSignature #Cryptography #HSM #Java #SpringBoot #CyberSecurity #DigitalIdentity #IAM #IdentityManagement #CloudSecurity #AWS #CloudHSM #EnterpriseSecurity #Microservices #JavaDeveloper #BackendDeveloper #SoftwareArchitecture #DevSecOps #OAuth2
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.).