Raditha Dissanayake

5.0

(2668 reviews)

US$19.00

For every 15 mins

5072

Sessions/Jobs

ABOUT ME

Polyglot, Software architect, RDBMS expert.

Done a heck of a lot of programming and software design since I wrote my first on a Sinclair ZX spectrum in 1987. Not enough of it has been made open source. 2000+ five star ratings

English

Sri Jayawardenepura (+05:30)

Joined June 2017

EXPERTISE

Java

23 years experience | 654 endorsements

I've been using Java since it's earliest versions. Wrote a series of ground breaking applets that were considered to have been impossible...

I've been using Java since it's earliest versions. Wrote a series of ground breaking applets that were considered to have been impossible to write. These applets were licensed by several fortune 500 companies.

Java Swing JavaFX Algorithm Data structure JDBC

Python

9 years experience | 420 endorsements

This is my favourite language. I Have a gold badges for both python and django on stackoverflow.

Keras TensorFlow Selenium

Keras TensorFlow Selenium Flask SQLAlchemy NumPy Pandas Django

JavaScript

20 years experience | 83 endorsements

I first wrote Javascript on a Netscape Navigator.

Node.js jQuery Google Maps

Node.js jQuery Google Maps React

Database

20 years experience | 88 endorsements

It's astonishing how often people save delimited values in database fields! Or forget to create indexes.

SQL Geospatial Technology Jsonb

SQL Geospatial Technology Jsonb PostGIS Trigger SQLite PostgreSQL MySQL

12 years experience | 183 endorsements

I first learnt C around 1989 used it exclusively till about 1997 then used it regulary till 2001. In that time I worked on embedded syste...

I first learnt C around 1989 used it exclusively till about 1997 then used it regulary till 2001. In that time I worked on embedded systems and IOT nearly 20 years before the term was even defined! Since i joined codementor, i have started to use C again on a regular basis.

Shell Pthreads Makefile

Shell Pthreads Makefile C MPI

C++

10 years experience | 203 endorsements

Similar to the story with C i used it from around 1996 to 2002 but didn't use it again regularly until I joined codementor

Qt/C++OOP STL

PHP

20 years experience | 53 endorsements

When I first learnt PHP it was still sometimes called Personal Home Page Parser and was in version 3.x those days mysql_* was the only A...

When I first learnt PHP it was still sometimes called Personal Home Page Parser and was in version 3.x those days mysql_* was the only API for mysql and php and mysql were often spoken of in the same breath. Today I am astonished to see people still using that mysql API and even those using mysqlI_* or PDO still use string concatenation in their queries instead of prepared statements.

PDO IMAP MySQLi

PDO IMAP MySQLi PHP 7

REVIEWS FROM CLIENTS

5.0

(2668 reviews)

Kaylee Corthea

August 2023

very good

Josh moten

July 2023

Making beginner mistakes but Raditha is very patient and is helping me learn more about programming and how to be a better programmer!!

Josh moten

July 2023

He was very patient even though my computer was slow but definitely using him again

Josh moten

June 2023

Excellent mentor!!! I will come to him again very soon!!!!

MGMomma2

May 2023

Fantastic, I would highly recommend working with Raditha. I learned so much and he was so quick!

Daniel Sandoval

May 2023

Fantastic. Explains information well, works through logic, and is very knowledgeable.

LearningDecisionAnalytics

May 2023

Thank you for help on Tensor Flow!

LearningDecisionAnalytics

May 2023

Thank you for tutoring on Tensor Flow!

LearningDecisionAnalytics

May 2023

Thank you for tutoring on Decision Trees, Random Forests, Gradient Boosting, and Stepwise Selection!

LearningDecisionAnalytics

May 2023

Great job in tutoring on linear and logistic regression!

SOCIAL PRESENCE

Stack Overflow

52166 Reputation

134

EMPLOYMENTS

Software Engineering Consultant

Cloud Solutions International

2023-07-01-Present

Architect, Manager, Mentor, Coach

Python

Java

Spring

Python

Java

Spring

Oracle

PostgreSQL

Redis

Spring Boot

JavaScript

Apache Kafka

Hibernate ORM

Experience Independent Software Developer, Consultant and Mentor

Independant

2017-06-01-Present

Throughout my career as an independent software developer, consultant, troubleshooter, and mentor, I have tackled and solved over 5000...

Throughout my career as an independent software developer, consultant, troubleshooter, and mentor, I have tackled and solved over 5000 challenging problems of varying degrees of complexity. My work has involved a wide range of technologies, from C and C++ to advanced tools like XGBoost. I take pride in being a versatile problem-solver, constantly expanding my knowledge and skills to meet the needs of each project and client.

As evidence of my expertise, I have been highly active on Codementor.io, where I consistently rank as a top mentor of the week.

Python

Java

C++

Python

Java

C++

Django

Node.js

MySQL

Linux

PostgreSQL

Pandas

Redis

Machine learning

Algorithm

React

Data Science

JavaScript

Microsoft SQL Server

Oracle SQL

TensorFlow

Next.js

Founder Chief Software Architect

road.lk

2013-02-01-2017-06-01

Initially launched as a free, crowd-sourced traffic alert system, road.lk quickly gained immense popularity. Even after the formal ava...

Initially launched as a free, crowd-sourced traffic alert system, road.lk quickly gained immense popularity. Even after the formal availability of Google Maps traffic reports in Sri Lanka, road.lk continued to thrive. Over time, the company expanded its offerings to include a carpool service. In developing our platform, we leveraged a range of innovative and diverse technologies, resulting in a dynamic and exciting product.

Python

Android

Java

Python

Android

Java

Django

Linux

PostgreSQL

Redis

GIS

JavaScript

Agile