Remote Work

🚀 I work as a Freelancer / Consultant / Contractor to develop  businesses and create great opportunities with high-quality software.

🧙‍♂️ Specialized in Java-based applications with the Spring Framework, I can easily adapt to any environment to provide great value and innovation. Always ready for new challenges and opportunities.

Senior Java Full Stack Developer • Contractor • Freelancer • Producing High-Quality Software

CARIAD

✅ 𝐅𝐚𝐯𝐨𝐫𝐢𝐭𝐞 𝐫𝐞𝐩𝐫𝐞𝐬𝐞𝐧𝐭𝐚𝐭𝐢𝐯𝐞 𝐦𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭

The client struggled to provide optimized and specialized services to aggregate responses for a high number of users due to the high data traffic. Existing services had intertwined and inefficient communication and needed to be optimized and upgraded.
 • 𝐄𝐧𝐡𝐚𝐧𝐜𝐞𝐝 𝐛𝐲 20% 𝐢𝐧𝐭𝐞𝐫 𝐬𝐞𝐫𝐯𝐢𝐜𝐞 𝐜𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧 by excluding redundant requests and successfully upgraded used versions of dependencies.
 • Increased software quality and business logic validation by writing automated tests to cover 𝐨𝐯𝐞𝐫 90% 𝐨𝐟 𝐭𝐡𝐞 𝐜𝐨𝐝𝐞𝐛𝐚𝐬𝐞.
 • 𝐃𝐞𝐜𝐫𝐞𝐚𝐬𝐞 𝐝𝐮𝐫𝐚𝐭𝐢𝐨𝐧 𝐛𝐲 20% of the build and deployment time by removing and limiting unnecessary services in the existing pipelines.
 • 𝐃𝐞𝐜𝐫𝐞𝐚𝐬𝐞𝐝 𝐬𝐲𝐧𝐜𝐡𝐫𝐨𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧 𝐝𝐮𝐫𝐚𝐭𝐢𝐨𝐧 𝐭𝐨 25% by batching parallel requests with no losses and 𝐞𝐧𝐬𝐮𝐫𝐞𝐝 𝐚𝐜𝐜𝐞𝐬𝐬 𝐯𝐢𝐚 𝐬𝐞𝐜𝐮𝐫𝐞𝐝 𝐀𝐏𝐈𝐬.

Senior Kotlin Consultant

Finastra

✅ 𝐔𝐬𝐞𝐫 𝐍𝐨𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐒𝐞𝐫𝐯𝐢𝐜𝐞

The client needed to provide users with a platform that would notify them whenever access was requested for one of their resources so that full transparency is reached but also allow them to track their notifications via an API. 
  • 𝐏𝐫𝐨𝐯𝐢𝐝𝐞𝐝 100% 𝐝𝐞𝐭𝐚𝐢𝐥𝐞𝐝 𝐚𝐧𝐝 𝐭𝐡𝐨𝐫𝐨𝐮𝐠𝐡 𝐝𝐨𝐜𝐮𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧 for multiple approaches to increase testing abilities over the system.
  • Implement system integration test ability with other third parties by providing a simulated event mechanism to trigger various flows and provide certainty of behavior for 𝐚 100% 𝐬𝐭𝐚𝐛𝐥𝐞 𝐚𝐧𝐝 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞 𝐬𝐲𝐬𝐭𝐞𝐦.
  • 𝐄𝐧𝐬𝐮𝐫𝐞𝐝 100% 𝐭𝐫𝐚𝐧𝐬𝐩𝐚𝐫𝐞𝐧𝐜𝐲 for specific events by exposing a fully secure and documented API.

Senior Java Consultant

eSolutions.ro

✅ 𝗜𝗼𝗧 𝗣𝗿𝗼𝗷𝗲𝗰𝘁

The client had a product developed for an obsolete microcontroller technology which could not process multiple tasks at the same time, providing a slow experience for users. On the cloud, the services grew in size, and so the number of used resources got more extensive, which led to a loss in scalability and performance.

  • 𝗘𝗻𝗵𝗮𝗻𝗰𝗲𝗱 𝘁𝗵𝗲 𝘂𝘀𝗲𝗿 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗯𝘆 𝟯𝟬𝟬% as fast device response time became a high-valuable asset by redesigning the application to handle tasks simultaneously. I assured instant sensor data readings and alacritous response times using the event-based operating system functionalities.

  • 𝗜 𝗱𝗲𝗰𝗿𝗲𝗮𝘀𝗲𝗱 𝘁𝗵𝗲 𝗰𝗼𝘀𝘁𝘀 𝗯𝘆 𝟯𝟱% of the cloud provider by seriously reducing the resources consumption of the services. Doubled the data availability by providing multiple access routes to the same information and splitting services. Thus the entire application became 𝘀𝗶𝗴𝗻𝗶𝗳𝗶𝗰𝗮𝗻𝘁𝗹𝘆 𝗺𝗼𝗿𝗲 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗶𝘃𝗲 𝗮𝗻𝗱 𝗲𝗮𝘀𝘆 𝘁𝗼 𝘀𝗰𝗮𝗹𝗲.

Senior Kotlin Full Stack Developer

✅ 𝗪𝗮𝗿𝗲𝗵𝗼𝘂𝘀𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗦𝘆𝘀𝘁𝗲𝗺

The client needed his online shop linked with a warehouse management system to optimise jobs for faster management and shipment.

  • I 𝗲𝗻𝗳𝗼𝗿𝗰𝗲𝗱 𝟭𝟬𝟬% 𝗮𝗰𝗰𝗼𝘂𝗻𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 for no longer sellable warehouse products by designing a data processing mechanism that regularly extracts figures from the system and produces valuable information and statistics ready for display.

  • 𝗔𝗰𝗵𝗶𝗲𝘃𝗲𝗱 𝗵𝗶𝗴𝗵 𝗰𝗹𝗮𝗿𝗶𝘁𝘆 𝗶𝗻𝘁𝗼 𝘁𝗵𝗲 𝘀𝗮𝗹𝗲𝘀 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 for the marketing managers at the time length of a few seconds by automatically building reports. Also, development cost dropped to 0 for report generation tasks.

Senior Java Full Stack Developer

✅ 𝗦𝗵𝗼𝗽 𝗮𝗻𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗳𝗼𝗿 𝘀𝗲𝗹𝗳 𝗰𝗵𝗲𝗰𝗸𝗼𝘂𝘁

The client needed a shop management system tool to feed data into an existing application easily and securely since inserting data was done manually, and it cost the business a lot of time and money. Because there were terrible Internet connections at exhibitions, the client lost a lot of customers due to slow and unreliable behaviour of the system.

  • 𝗚𝗿𝗲𝗮𝘁𝗹𝘆 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗱 𝘁𝗵𝗲 𝗱𝗮𝘁𝗮 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 with 100% providing the web interface by designing an easy-to-use, secure and stable system. The client was genuinely pleased with the design suggestions and greatly improved the flow of the application.

  • 𝗘𝗻𝘀𝘂𝗿𝗲𝗱 𝗮 𝟱𝟬𝟬% 𝗳𝗮𝘀𝘁𝗲𝗿 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 to set up the whole production infrastructure on one local computer to install for exhibitions by creating an automatic install process that is easy to use for any level of technical knowledge. The functionalities running on the local machine were running 10 times better, with no lagging or failed communication.

✅ 𝗛𝗲𝗮𝘁𝘄𝗮𝘃𝗲 𝗔𝗹𝗲𝗿𝘁𝗶𝗻𝗴 𝗦𝘆𝘀𝘁𝗲𝗺

The client wanted to provide a proactive alerting system capable of detecting dangers to older adults, young children and patients with chronic medical conditions at high risk for a heat-related illness. The application will help raise awareness and promote proactive behaviour and provide value from gathered data to third-party businesses.

  • 𝗦𝘂𝗰𝗰𝗲𝘀𝘀𝗳𝘂𝗹𝗹𝘆 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 𝗮 𝗳𝘂𝗹𝗹𝘆 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝗮𝗹 𝗮𝗻𝗱 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁 𝘀𝘆𝘀𝘁𝗲𝗺 with zero costs by using all free available resources and local infrastructure to persist and process data provided to users on their computer or smartphone as a highly intuitive and interactive map.

  • I 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁𝗹𝘆 𝘂𝘀𝗲𝗱 𝗼𝗻𝗹𝘆 𝟭𝟬% of the screen to display anonymised data about the critical areas on the map by designing an easy-to-use infinite auto-scrolling and interactive list of cases considered to be of the highest risk.

Java Full Stack Developer

✅ 𝗢𝗻𝗹𝗶𝗻𝗲 𝗦𝗵𝗼𝗽

The customer wanted to develop a friendly and interactive platform to sell its products all over the world. Processing orders took a very long time so customers were not satisfied with this delay in their delivery.

  • 𝗜𝗺𝗽𝗿𝗼𝘃𝗲𝗱 𝘁𝗵𝗲 𝗼𝗿𝗱𝗲𝗿 𝗽𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴 𝘀𝗽𝗲𝗲𝗱 𝟯 𝘁𝗶𝗺𝗲𝘀 by parallelising and optimising the data pipeline. The result took duration from 18 minutes per batch to only 4 minutes.

  • 𝗗𝗿𝗮𝘀𝘁𝗶𝗰𝗮𝗹𝗹𝘆 𝗿𝗲𝗱𝘂𝗰𝗲𝗱 𝗱𝗮𝘁𝗮 𝗶𝗺𝗽𝗼𝗿𝘁 𝘁𝗶𝗺𝗲 into its storage to 𝟭𝟬 𝘁𝗶𝗺𝗲𝘀 𝗳𝗮𝘀𝘁𝗲𝗿 𝘁𝗿𝗮𝗻𝘀𝗳𝗲𝗿 by designing a process to fully automate data gathering, validation and aggregation from third-party platforms. Also, sending out status notifications to all interested parties via various means.

✅  𝗲𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗣𝗿𝗼𝗴𝗿𝗮𝗺

The client wanted an eLearning platform to sell its courses because using a provider would increase costs and decrease control over content and quality. Also, time to update presentation website content would take very long and expensive development time.

  • Increased content generation’s 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝘃𝗶𝘁𝘆 𝗯𝘆 𝟴𝟬% through designing templates and elements to fit and edit easily.

  • Successfully 𝗰𝗿𝗲𝗮𝘁𝗲𝗱 𝘁𝗵𝗲 𝗽𝗼𝘀𝘀𝗶𝗯𝗶𝗹𝗶𝘁𝘆 𝘁𝗼 𝗱𝗲𝘃𝗲𝗹𝗼𝗽 𝗺𝗮𝗿𝗸𝗲𝘁𝗶𝗻𝗴 𝗰𝗼𝗻𝘁𝗲𝘀𝘁𝘀 for students and attract new or existing customers by offering the feature right on the platform.

Java Software Developer

✅ 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗧𝗿𝗮𝗻𝘀𝗮𝗰𝘁𝗶𝗼𝗻 𝗠𝗶𝗱𝗱𝗹𝗲𝘄𝗮𝗿𝗲

The client had two separate systems that could not communicate directly and manually do the moving, mapping and validation of data between the two. Delay for such transactions would cause the business to lose clients and money.

  • 𝗚𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲𝗱 𝟭𝟬𝟬% 𝘁𝗿𝗮𝗻𝘀𝗽𝗮𝗿𝗲𝗻𝗰𝘆 of the processed data to authenticated support users by providing a secure and intuitive web interface. A retry mechanism for processing was in place to ensure everything gets handled with success.

  • 𝗜𝗻𝗰𝗿𝗲𝗮𝘀𝗲𝗱 𝗽𝗮𝘆𝗺𝗲𝗻𝘁 𝘁𝗿𝗮𝗻𝘀𝗮𝗰𝘁𝗶𝗼𝗻 𝗽𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴 𝘀𝗽𝗲𝗲𝗱 𝘁𝗲𝗻 𝘁𝗶𝗺𝗲𝘀 as jobs were handled simultaneously by parallel streaming the information to the third party system and database storage. Asynchronous processing model allowed more data to go through the system and serve a massive amount of users.

Senior Kotlin Software Developer

Luxoft

✅ 𝗧𝗲𝗹𝗲𝗰𝗼𝗺 𝗽𝗿𝗼𝗱𝘂𝗰𝘁

The client had an embedded C project that was showing various functionality issues and incomplete debugging features.

  • I 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗱 𝘁𝗵𝗲 𝗱𝗲𝗯𝘂𝗴𝗴𝗶𝗻𝗴 𝘁𝗼𝗼𝗹 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆 𝗼𝗳 𝘁𝗵𝗲 𝘀𝘆𝘀𝘁𝗲𝗺 𝗯𝘆 𝟭𝟬% by bringing more information on the console interface. Also, adding statistics and valuable details increased QA bug description accuracy.

  • I successfully 𝗽𝗿𝗼𝘃𝗶𝗱𝗲𝗱 𝘀𝘁𝗮𝗯𝗹𝗲 𝗯𝗲𝗵𝗮𝘃𝗶𝗼𝘂𝗿 𝗼𝗳 𝘁𝗵𝗲 𝘀𝘆𝘀𝘁𝗲𝗺 by testing, reproducing and fixing 100% of the assigned issues directly reported by clients or QA department.

Embedded Software Engineer

✅ 𝗣𝗼𝗽𝘂𝗹𝗮𝘁𝗶𝗼𝗻 𝗦𝘁𝘂𝗱𝘆 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺

The client lost a great deal of time and money organising and managing meetups to gather respondents’ data. Information extracted from respondents would be analysed and sold to third parties for marketing planning and future product development.

  • Saved the client 𝗮𝘁 𝗹𝗲𝗮𝘀𝘁 $𝟭𝟬𝟬𝟬 𝗽𝗲𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 by designing a platform to organise online events versus offline events. The client was able to enhance the value of information extracted from the respondents by directly communicating with each user in particular.

Web Developer

👉🏼 I am a Senior Java Full Stack Developer / Freelancer / Contractor with 8+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 helping businesses implement scalable software solutions.

✅ 𝗔𝗯𝗼𝘂𝘁 𝗺𝘆 𝘀𝗸𝗶𝗹𝗹𝘀:
▪️ Java, Kotlin, C++      
▪️ Spring, Arduino, Ktor
▪️ Maven, Gradle, PlatoformIO
▪️ Kubernetes, Swarm, GCP, Cloud Foundry
▪️ Kafka, PostgreSQL, Redis, Mockito, JUnit, JPA, Hibernate
▪️ Angular, ReactJS

💻 Only interested in remote work

⭐ If you think my expertise can help your organisation, let's have a chat!

📞   𝗣𝗵𝗼𝗻𝗲: +40 744 355 181
✉️   𝗘𝗺𝗮𝗶𝗹:  cristian.popescu.developer@gmail.com
💬   𝗦𝗸𝘆𝗽𝗲: cristian.popescu.developer

Taplio

Cristian Popescu's Linkedin Analytics

Want to drive more opportunities from LinkedIn?

Taplio

.css-1jgreyo{background-image:linear-gradient(284deg, rgba(39,43,72,1) 0%, rgba(33,47,183,1) 100%);color:transparent;-webkit-background-clip:text;background-clip:text;}Cristian Popescu's Linkedin Analytics

Want to drive more opportunities from LinkedIn?

Cristian Popescu's Linkedin Analytics