🏛 The client, a startup company in cold chain logistics had serious difficulties in raising funds from investors caused by the lack of a working prototype that was able to carry out an end-to-end delivery of customer goods.➠ 𝗦𝗲𝗰𝘂𝗿𝗲𝗱 𝟲 𝗳𝗶𝗴𝘂𝗿𝗲𝘀 𝗳𝘂𝗻𝗱 𝗶𝗻 𝗹𝗲𝘀𝘀 𝘁𝗵𝗮𝗻 𝟲 𝗺𝗼𝗻𝘁𝗵𝘀 by designing a custom-tailored architecture of the MVP to be easily integrated with 3rd party transportation and warehouse management systems.➠ 𝗜𝗺𝗽𝗿𝗼𝘃𝗲𝗱 𝘁𝗵𝗲 𝗮𝗰𝗰𝘂𝗿𝗮𝗰𝘆 𝗼𝗳 𝘁𝗵𝗲 𝗺𝘂𝗹𝘁𝗶-𝘀𝘁𝗮𝗴𝗲 𝗾𝘂𝗼𝘁𝗮𝘁𝗶𝗼𝗻 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 𝗯𝘆 𝟱𝟬% and reduced the response time of displaying summary data by 25% by designing the warehouse reservation algorithm and by designing pre-aggregation processes.⚙ Skills: NodeJS, NestJS, Typescript, Mongoose, MongoDB, Rest API, OpenAPI, Jest, Yarn, Docker, Gitlab, Google Maps Services

🏛 The client, a global leader in home appliances, was stuck in a vicious circle caused by spending millions of US dollars in fees for cloud services that he could not get rid of due to an acute lack of resources to replace said services.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝗰𝗼𝘀𝘁𝘀 𝗯𝘆 𝗺𝗼𝗿𝗲 𝘁𝗵𝗮𝗻 $𝟭.𝟱𝗠 by designing and delivering a fresh-baked, high throughput NodeJS microservice with 3 Rest API endpoints deployed to the customer’s own cloud, handling special smart home commands that controlled end-user appliances. This enabled the resignation of the expensive contract.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝘁𝗵𝗲 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝘁𝗶𝗺𝗲 𝗼𝗳 𝗮𝗰𝗰𝗼𝘂𝗻𝘁 𝗹𝗶𝗻𝗸𝗶𝗻𝗴 𝗯𝘆 𝟯𝟬% by optimizing the data flow by issuing Rest API calls in parallel and obtained double certification for voice controlling of devices from Alexa and Google.⚙ Skills: NodeJS, Typescript, Express, Jest, Docker, Git, Amazon Alexa, Google Smart Home

🏛 The client, a startup in the fintech world, was failing to respect its mission statement “account switching in 10 minutes” due to a lack of manpower to handle the increasingly growing workload caused by the slow hiring process. Also, the existing code base was inefficient which led to the necessity to migrate from Ruby to Java and adopt microservices architecture.➠ 𝗘𝗻𝘀𝘂𝗿𝗲𝗱 𝟭𝟬𝟬% 𝗮𝗰𝗰𝘂𝗿𝗮𝗰𝘆 𝗼𝗳 𝘁𝗵𝗲 𝗴𝗲𝗻𝗲𝗿𝗮𝘁𝗲𝗱 𝗱𝗮𝘁𝗮 for human-readable insights and financial reports by designing Spring Boot microservices, Rest API endpoints, and database query aggregates for end user’s financial timelines.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝘁𝗵𝗲 𝗳𝗮𝗶𝗹𝘂𝗿𝗲 𝗿𝗮𝘁𝗲 𝗼𝗳 𝗯𝗮𝗻𝗸 𝗮𝗰𝗰𝗼𝘂𝗻𝘁 𝘀𝘄𝗶𝘁𝗰𝗵𝗶𝗻𝗴 𝗯𝘆 𝟱𝟬% by extending the notification system with 2 new channels, sending fax and postal letter through the Rest API of 3rd party providers.⚙ Skills: Java, Spring Boot, Spring Data, Rest API, Liquibase, MongoDB, MySql, Microservices, JUnit, Docker, GitHub

👉 I work as a Consultant / Contractor / Freelancer and help businesses develop their software solutions.👉 My programming language of choice is Javascript / Typescript / NodeJS (backend solutions using mainly NestJS framework) but I have also done Java development for 13+ years (mainly with Spring framework). I am continuously looking for new challenges and self-improvement.🤝 If I can be of assistance, feel free to contact me.

🏛 The client, a European leader in the automation market, was unable to generate new sales and was wasting significant amounts of time and money on executing tests manually due to the lack of automation engineers and the missing metrics of test automation for his product.➠ 𝗦𝗲𝗰𝘂𝗿𝗲𝗱 𝟮 𝗻𝗲𝘄 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁 𝗰𝘂𝘀𝘁𝗼𝗺𝗲𝗿𝘀 and retained existing ones by providing 95% accurate coverage metrics via in-depth research and identification of 600+ test cases, compared with the existing manual test cases.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝘁𝗵𝗲 𝗲𝘅𝗲𝗰𝘂𝘁𝗶𝗼𝗻 𝘁𝗶𝗺𝗲 𝗼𝗳 𝘂𝘀𝗲𝗿 𝗮𝗰𝗰𝗲𝗽𝘁𝗮𝗻𝗰𝗲 𝘁𝗲𝘀𝘁𝘀 𝗳𝗿𝗼𝗺 𝟭 𝘄𝗲𝗲𝗸 𝘁𝗼 𝟭 𝗱𝗮𝘆 by automating 75% of the manual tests by designing test scenarios in ReadyAPI and JUnit, Cucumber, having those integrated in the pipeline.⚙ Skills: ReadyAPI, Java, Cucumber, JUnit, Vagrant, SVN, Postgres SQL

🏛 The client, a European leader in the automation market, was wasting a significant amount of profit on executing manual tests due to a missing automation ecosystem for his products.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝘁𝗵𝗲 𝗿𝗲𝘃𝗲𝗻𝘂𝗲 𝗹𝗼𝘀𝘀 𝗯𝘆 𝟳𝟱% by enabling the run of hundreds of automated tests triggered remotely by designing a SoapUI plugin in Java Swing that extended the save and update functionalities of test cases and test suites by synchronizing project files with SVN repository.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝟭𝟬𝟬% 𝘁𝗵𝗲 𝗼𝘃𝗲𝗿𝗵𝗲𝗮𝗱 𝗳𝗼𝗿 𝗺𝗮𝗻𝗮𝗴𝗲𝗿𝘀 𝗮𝗻𝗱 𝗹𝗲𝗮𝗱𝗲𝗿𝘀 by having in-time QA reports by enabling test report generation with 1 click of a button by integrating Testrail test management system with SoapUI test runner via a web-service.⚙ Skills: Java, Swing, SoapUI, SVN, Testrail

🏛 The client, a European leader in e-banking solutions, was falling behind on deadlines and was unable to handle the increasing demands for new features such as the processing and importing of special banking reports due to the lack of a special module supporting modern XML report formats.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝘁𝗵𝗲 𝗽𝗿𝗲𝘀𝘀𝘂𝗿𝗲 𝗰𝗮𝘂𝘀𝗲𝗱 𝗯𝘆 𝗱𝗲𝗮𝗱𝗹𝗶𝗻𝗲𝘀 𝗯𝘆 𝟮𝟬% and 𝗶𝗻𝗰𝗿𝗲𝗮𝘀𝗲𝗱 𝘁𝗵𝗲 𝗰𝗹𝗶𝗲𝗻𝘁’𝘀 𝗰𝗼𝗺𝗽𝗲𝘁𝗶𝘁𝗶𝘃𝗲𝗻𝗲𝘀𝘀 𝗼𝗻 𝘁𝗵𝗲 𝗺𝗮𝗿𝗸𝗲𝘁 𝗯𝘆 𝟭𝟱% by designing a new reporting module with importers for 3 XML file formats (CAMT, UNIFI, ZKA) in 6 months’ time. This allowed end users to see almost real time updates on their balances.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝘁𝗵𝗲 𝗻𝗲𝗴𝗮𝘁𝗶𝘃𝗲 𝗶𝗺𝗽𝗮𝗰𝘁 𝗼𝗻 𝘁𝗵𝗲 𝘀𝘆𝘀𝘁𝗲𝗺 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗯𝘆 𝟳𝟱% by using SAX parser instead of DOM parser for large XML files (tens to hundreds of MB in size) that were archived by zip upon receipt.⚙ Skills: Java, Spring, Struts, JUnit, SAX, Git, JBoss

🏛 The client, an outsourcing company, was at the brink of losing one of his major customers due to lacking manpower which caused a delay in delivering contracted features by deadlines.➠ 𝗠𝘂𝗹𝘁𝗶𝗽𝗹𝗶𝗲𝗱 𝘁𝗵𝗲 𝗻𝘂𝗺𝗯𝗲𝗿 𝗼𝗳 𝗲-𝗺𝗮𝗿𝗸𝗲𝘁𝗶𝗻𝗴 𝗰𝗮𝗺𝗽𝗮𝗶𝗴𝗻𝘀 𝗯𝘆 𝟱𝘅 by implementing the screens in HTML, Struts and Velocity and writing data generators in Java for 8 campaigns for one of the client’s key customers.➠ 𝗥𝗲𝗱𝘂𝗰𝗲𝗱 𝘁𝗵𝗲 𝗶𝗻𝘀𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗼𝗳 𝘁𝗵𝗲 𝘀𝘆𝘀𝘁𝗲𝗺 𝗯𝘆 𝟭𝟱% by fixing an average of 10 bugs / week in Java for different customers as no QA was involved in system testing.⚙ Skills: Java, Spring, Hibernate, Struts, Velocity, SVN, MS SQL Server, JBoss