Costin Oncioiu
Freelance Digital Marketing Specialist
Erfahrungen
Java Developer
Eucon Gmbh
Currently using my tech expertise on a new AI-driven software activating in the Real Estate industry. The focus of the platform is to automate the invoice-handling process for companies working with large volumes.
As a Java Engineer in this project, I was involved in the end-to-end development of the platform, from scratch to production-ready software. As the client base grew, I had to integrate new features and ensure that the system was highly scalable and reliable.
- Use my knowledge to design the domain of the platform aligning with the business objectives
- Implemented robust authentication and authorization system in a dynamic multi-tenant environment.
- Code the business layer logic, using the best software development standards in the industry including quality gates and testing coverage
- Continuously contribute to creating a maintainable architecture that fits the product expansion plans based on the business needs
Java, Spring, MongoDB, Liquibase, GitLab CI/CD, Docker, Kubernetes, Tilt, Microsoft Azure, GRPC & Protobuf, Testcontainers, Spock(Groovy)
Java Developer
Coherent Solutions
Working for a leading company in the advertising industry, the project was providing measurements for marketing campaigns across all types of platforms(TV, Digital, Mobile) but also measurements for network/publisher owners.
My job as a Java developer is to create the business logic that helps configure client advertising campaigns and also aggregates data coming from the data team into reports and exposes them to UI team. Our team created a high-performing business layer, that exposed big loads of data, after applying all the required business logic to it.
While working on this project, alongside my team I managed to:
- Create a business layer from 0, including various microservices, and use AWS to facilitate communication between them.
- Create a wrapper over company SSO, that added additional security to our project and enabled authentication and authorization through it.
- Enhance the performance of the application, so the responses are fast even though the data loads are huge.
- Actively participating in designing architecture for this project, including creation of the domain model, splitting business logic between different microservices, designing lambdas, analyzing and optimizing the dataflow
- I was owner of different parts of project, so I was responsible of improving, solving problems and helping other teammates/teams interact with them
Tech stack: Java, Spring, JPA/Hibernate, AWS, Prometheus, Flyway, Jenkins, Microservices, Docker, SQL(Postgres), Oauth 2, PgCron
Fullstack Java Developer
Jouve International
Being involved in design, development and maintenance of a software system, developed for leading company in area of financial reports and proxy statements. My job is to participate on development of a platform that resembles google sheets, but with a lot of custom features, that also provides the capability to manage the involved resources (projects, clients, worker allocation etc.).
- Developed new features and extended existing ones
- Analyzed client requirements and delivered best quality for their needs
- Built authentication and authorization of application
- Adjusted application to enhance its performance
- Took interviews with newcomers and integrated them into the team
- Performed backend work, but also involved in some frontend development
Main tech stack: java 11, Spring (Springboot, web, security, core, mvc, aop ...), JPA&Hibernate, Angular 10 (Typescript+html+css), Angular Material, Git, Jenkins, SonarQube, Sql databases
Fullstack Java Developer
Artsoft Consult
- Have been involved in development of b2b software that was used by leading global telecommunication companies. My job was to design, develop and maintain software system components that work on large scale giving fast and efficient responses.
- I have also been working on multiple projects for one of the biggest manufacturers of agricultural, construction and forestry machines, contributing on building their resource management platform and also to a connector interface that served for payment, billing, stocks and established connection between a variety of their shops.
- This project had a lot of old code that did parallel processing, so one of my tasks was to optimize this and I managed to increase efficiency and also readability/predictability of those parts of the application that were doing parallel computing in an inefficient way
Tech stack: Java, Spring (Core, MVC, Security, Web, AOP, Data, SpringBoot), Maven, Relational DBs (PostgresSql, DB2, H2), AWS, Microservices, Axon Framework (event driven messaging), Docker, ActiveMQ, JPA+Hibernate, , Angular(2+), AngularJs, Javascript, HTML+CSS+Bootsrap, Code quality tools (such as Greylog, Veracode, SonarQube), Active MQ, Okta security
Software Engineer
Micro Focus
I've worked on a platform for full server management (thousands of servers). My role was to integrate new OS's with the system and to improve old components and to develop new ones.
The stack of used technologies included Python, Java, VM's, network protocols, Operating Systems, Networking, and SVN. We were working in an Agile manner.
Web developer
TSS-YONDER
Been involved in development of a huge management platform for employee management of schools and utility companies. My job was to implement features based on requirement analyst, clarify/confirm requirements with the customer.
Worked with the following technologies: Angular 4, Typescript, HTML&CSS, JavaScript, HTTP, Redux pattern, ngrx, Material design, NodeJs, Git