Java, Spring Framework (Core, Data, Boot, Batch, Cloud, Security, Retry, MVC, AOP, Reactor), MapStruct, Lombok, WebFlux, Hibernate, JPA2, Kafka, Flyway, Microservices Architectuur, Docker, Kubernetes, PostgreSQL, MongoDB, Redis
.NET Core, ASP.NET Core MVC, ASP.NET Web API, Xamarin.Forms, WPF, UWP, Stateless Architecture, Microservices, Azure Cloud (App Service, IoT Hub, Event Hub)
Django, Django Rest Framework, Flask, FastAPI, AsyncIo, AioHttp, Tornado, Celery, Microservices Architectuur, Docker/Kubernetes, PostgreSQL, MySQL, MongoDB, Redis, DynamoDB
PHP

DUKPT, Laravel, Symfony, Yii2, WordPress, Drupal, MySQL, MongoDB, PostgreSQL, REST/SOAP/GraphQL API, OAuth, HTML, Twig, Swagger, Redis, ElasticSearch, Docker, Stripe, PayPal
NODE.JS

NestJS, Koa, MongoDB, PostgreSQL, AWS
Unity, Godot, Blender, Krita, Amplify Shader Editor, MapBox SDK, Unity IAP, Firebase SDK, ARCore, AR Foundation, ARKit, Vuforia, Google VR SDK, Steam VR SDK, Unity XR Platform SDK
Ruby on Rails, Sinatra, Hanami, Padrino, Volt, EventMachine, Rack, Sidekiq, GraphQL, Web Socket, Swagger, JWT, OAuth
Go, gORM, Gin, protobuf, gRPC, AWS, GCP, Docker, Redis, Mongo DB, PostgreSQL
Rust, Rustup, Cargo, clap, structopt, argh, actix-web, gotham, nickel, rocket, axum, tide, warp, yew, wasm-bindgen, js-sys, web-sys, gloo. Games: amethyst, bevy, fyrox, piston, nannou, ggez, godot, raylib, SFML
STL/C++11/14/17/20, GCC, CLang, MSVC++, WinDBG, GDB, Visual Studio, QTCreator, VIM, VSCode, CMake, Makefile, Ninja, Conan, Vcpkg, Boost, opencv, poco, protobuf, gRPC, fmt, pybindll, spdlog, ranges_v3, tensorflow, opencl, Asio++, gtest/gmock, cppunit, QT, catch2, google profiler, pytorch c++, chromium
Unreal Engine, C++, C, C#, Blueprints, UAT, UE4 Shader Graph, Unity URP HLSL, OpenGL ES
Cobol, GnuCOBOL, VSAM, JCL, TSO/ISPF, XPEDITER, FileAid, Changeman, CICS, Hostbridge, SQL/DB2, Endevor, Visual Studio, TACL, FTP, SFTP, SCOBOL, DDL, ENFORM, eInspect, Batchcom