Knowledge on high number of software areas: IoT, IoT Edge, Web & Cloud (fullstack), AWS (DynamoDB, Lambdas, IAM), Azure (IoT, Edge, VMs, Data Factory, Functions), low-level device drivers, databases (sql, nosql, graphs, clustering), virtualization (Azure VM, VirtualBox, VMWare), containerization (Docker, LXC, HyperV), DevOps (pipelines, artifacts, automation), desktop/console development, PIM (Product Information Management) development, secure programming (password hashing, encryption, crypto algorithms), networking (socket programming, protocol development, router configuration, cisco packet tracer, network configurations, etc), shell scripting (bash, powershell, batch, etc.)

Experience with many databases: PostgreSQL, MySQL, MSSQL, SQLite, MongoDB, HBase, Neo4J, Redis, CouchDB, DynamoDB

Experience with numerous languages and frameworks: Assembly, 6502 Assembly (Atari 2600), C, C++ (Visual C++, Qt Qtlib, QML), C# (.NET Framework, ASP.NET, .NET Core, Unity 4 game development), LINQ, Java (EJB, TomCat, Android), Kotlin (Android), Python (Django, Flask, Dash, Dash-Daq), Ruby (scripting), PHP, SQL, HTML4/5, CSS, JavaScript (plain, React Native, node.js), Scala (with Apache Spark), XML, YAML (DevOps, Ansible), Bash (scripting), Cypher, Matlab (signal processing, maths, programming), GoLang, Rust

Not (yet) experience with e.g.: Clojure, Ada, vue.js, Angular, Visual Basic, iOS Swift, ios dev, R, Perl, Objective-C, Spring Boot