Hire Top Freelance
Java Developers
in Brazil

BSc and MSc in Computer Science. I am a software developer with +10 years of experience mainly with Java, C# .Net, and Web Development (js libs, CSS, HTML). And also strong experience with Desktop development.

JavaAWS (Amazon Web Services)C#JavaScriptGitAndroidSpring BootSQL

I'm a senior full-stack Developer, with 15+ years of experience. I've built systems for telecom, the department of motor vehicles, UN projects, and the government sector (ministry of education, army, attorney office, tax administration). I'm also a data scientist with 3+ years of experience working with R and Python with predictive models in production and papers published in international conferences. I have 64+ jobs/sessions and 25 reviews, all five stars (check [codementor.io/@leonsolon](http://codementor.io/@leonsolon)) at Codementor. Main skills: * Languages: Java, Python, R, SQL, HTML, CSS, Javascript * Frameworks/Libs: Spring, Spring Boot, Bootstrap, Pandas, Dash, Plotly, Seaborn, TensorFlow, Numpy, Scikit-Learn, PyCaret Client reviews from Codementor: Sam Bravo - November 2020 Leon was the best help I have ever received. So patient, kind, and smart! Did not abandon me. Extremely reliable/communicative/and timely. Will get the job done! I will definitely go to him again in the future ! Michael Gloven - July 2020 excellent work, was able to resolve a complicated issue in short time Msdek - June 2020 He does the work he is asked for. Cooperates, high-quality code. High knowledge of Java. elbin zacharia mathew - June 2020 Best and professional in his works. Has a positive attitude and very helpful to rectify problems faced. I recommend him. Thank you for helping me out mate. Appreciate your patience. Nuno Simões - May 2020 Fantastic understanding. Works very quickly, very friendly and sugests new ways to make projects that are very interesting. I will definitly hire him again. Joel Chenoweth - May 2020 I've never tried this before but Leon really helped a lot. He was timely, fast... a real pro! Navid - May 2020 Leon is honest, friendly, and a skillful coder in Python (data science). More importantly he is a moral human being! Will definitely come back again! Da Yin - May 2020 Leon is very progressional and very kind in helping me with. I highly recommend Leon! Thank you Leon. Caroline Alexander - May 2020 Leon was SO helpful in getting my R code to work. I am very thankful!!

JavaRESTful APINoSQLSQLFlaskDjangoSpring BootRPythonData Science

Software Engineer with 10 years of experience, focused on backend using Node.js. I am experience in several programming languages like Java and Ruby. I have AWS background as well as frontend. Excperience creating reliable API's and maintaining databases

JavaJavaScriptSQLAWS (Amazon Web Services)MongoDBTypeScriptNode.jsRuby on RailsAngularReact