Denys B. — C++ Engineer with video experience

Expertise in Full Stack Web.

Last verified on October, 2023

Core Skills

C++

Bio Summary

- Senior Software Engineer with over 11 years of experience in full-cycle product development with video experience.
- Proficient in multiple programming languages including C++17, C#, Golang, Python, and SQL.
- Skilled in test-driven and behavior-driven development, with a focus on desktop and client-server application development for Windows, Linux, and Mac OS.
- Experienced in cloud application development using microservice architecture, Docker, AWS, Kubernetes, and SQL/NoSQL databases.
- Strong knowledge of Windows internals and driver development, including WinAPI, IPC, RPC, ATL/COM, KMDF drivers, and system services.
- Expertise in reverse engineering for Windows and Mac OS, using tools such as IDA Pro, WinDbg, and HEX editors.
- Proficient in data protection using system built-in and third-party crypto libraries like OpenSSL.

Technical Skills

Programming Languages	C, C#, C++, Go, Java, OpenCL, Python
C++ Libraries and Tools	ATL, tinyxml
C++ Frameworks	Boost C++
.NET Platform	.NET, Visual Basic .NET
Databases & Management Systems / ORM	PostgreSQL, Redis, SQL
Deployment, CI/CD & Administration	Active Directory
SDK / API and Integrations	Admission Webhooks, GraphQL, Swagger, TPM API, Windows API
Scripting and Command Line Interfaces	Bash, PowerShell
Mail / Network Protocols / Data transfer	cURL, GRPC, OpenSSL
Virtualization, Containers and Orchestration	Docker, Kubernetes
Logging and Monitoring	Prometheus
Third Party Tools / IDEs / SDK / Services	Qt Framework
Methodologies, Paradigms and Patterns	RPC (Remote Procedure Call)
Other Technical Skills	ArangoQL, bird, C for KMDF, COM, Credential Provider, CUDA, Custom Resource Definition, DocumentDB (MongoDB), go-kit, go-nats, gtest, Hashicorp Consul, Hashicorp Consul & Vault, jsoncpp, KMDF, mhook, Protobuf, SystemD, WinRM

Work Experience

Senior Software Engineer, Clipboard protection hooks

Duration: 2023
Summary:

Researching behavior of WinAPI that interacts with clipboard
Implementing COM-server with clipboard protection functionality
Implementing hooks DLL with clipboard protection functionality and monitoring features
Investigating and solving problems with clipboard interaction for some specific application with non-standard clipboard

Responsibilities: Researcher, Developer
Technologies: C++17, mhook, WinAPI, ATL, COM

Senior Software Engineer, Driver filter for Windows Registry redirection

Duration: 2022
Summary:

Researching how to redirect registry keys for particular process to isolate it
Implemented PoC that redirects registry calls for children of the target process

Responsibilities: Researcher, Developer
Technologies: C for KMDF, Windows Kernel API

Senior Software Engineer, Antikeylogger solution in KMDF driver

Duration: 2021
Summary:

Researching how to intercept keystrokes in kernel and deliver them to the target process in user mode
Implemented PoC with interceptor driver and consumer DLL that should be injected to the protected process

Responsibilities: Researcher, Developer
Technologies: C for KMDF, Windows Kernel API

Senior Software Engineer, Software defined network

Duration: 2020-2021
Summary:

Creating network namespaces, interfaces, wireguard tunnels as systemd units
Implemented parts of heavily loaded multithreaded system
Making benchmarks
Monitoring the network namespace resources and exporting to Prometheus

Responsibilities: Backend developer
Technologies: Go, bash, Docker, Prometheus, Systemd, bird

Senior Software Engineer, Property management system

Duration: 2020
Summary:

Creating architectures for microservices decomposed by managed data
Implementing microservices with GRPC internal API using code generation tools
Designing and implementing GraphQL interface for API-gateway using code generation tools
Integrating US payment system
Integrating tenant screening service

Responsibilities: Lead backend developer, Researcher
Technologies: Go, ArangoQL, bash, Docker, Kubernetes, GraphQL, GRPC (proto3)

Senior Software Engineer, Software defined perimeter

Duration: 2019-2020
Summary:

Separating the project on specific modules, creating architectures for each module and their interaction inside and outside the infrastructure
Implementing SDP controller with Keycloak as default IDP
Implementing user authorization and authentication with JWT on SDP controller
Managing user access to internal and external resources using DAC logic
Designing and implementing REST API using Swagger and golang code generation tools
Integrating OKTA as external IDP

Responsibilities: Researcher, Backend developer
Technologies: Go, bash, Swagger, Redis, Hashicorp Consul

Senior Software Engineer, Corporate identity provider based on microservices

Duration: 2019
Summary:

Implementing interaction between services using REST API and NATS queue
Implementing data analyzing aimed to protect privacy of logged in user
Implementing fast and secure data sharing between services
Migrating PostgeSQL tables to the new schemas

Responsibilities: Researcher, Dev manager, Backend developer
Technologies: Go, SQL, bash, Docker, Kubernetes, go-kit, go-nats, Redis, PostgreSQL, DocumentDB (MongoDB), Hashicorp Consul & Vault

Senior Software Engineer, Kubernetes native policy engine

Duration: 2019
Summary:

Researching the work of Kubernetes API server
Implementing interaction with Kubernetes API server using k8s repo packages
Implementing CRD with own controller
Implementing validation and mutation admission webhooks in CRD controller
Made cloud application stand-alone and self-tuning for work inside and outside the cluster

Responsibilities: Researcher, Dev manager, Developer
Technologies: Go, bash, Kubernetes, Custom Resource Definition, Admission Webhooks

Senior Software Engineer, Highly available service by client's geolocation

Duration: 2018
Summary:

Researching the concept for AWS
Writing scripts and resource definitions for creating infrastructure in the cloud
Calculating development and operation costs for AWS, Azure and Google Cloud

Responsibilities: Researcher, Developer
Technologies: Python, bash

Senior Software Engineer, Autotest for RDP Server component

Duration: 2018
Summary:

Implemented scripts that prepare and manage Windows and Linux machines on Hyper-V
Implemented scripts for starting RDP connection from the Windows as server
Implemented Autoresponder for the RDP client side to determine successful RDP connection
Implemented tests management using
csv file
Implemented automated test deployment and launching using Bamboo

Responsibilities: Researcher, Single developer
Technologies: PowerShell, C#, bash, WinRM

Senior Software Engineer, RDP Server component for custom authentication

Duration: 2018
Summary:

Researching TPM, reversing Windows binaries for its support
RDP virtual channel implementation
Implementation of Credential Provider with custom Credentials
Researching OS bugs and limitations
Improving functionality and fixing bugs in PnP driver
Implementing COM-server as Windows service
Implementing interaction with Active Directory and Local System Authority from C# and C++ code

Responsibilities: Researcher, Developer
Technologies: C++, C#, PowerShell, bash, Credential Provider, COM, TPM API, Active Directory

Senior Software Engineer, Provisioning of VMs on VMWare vSphere and Hyper-V

Duration: 2017-2018
Summary:

Fixing bugs in windows services
Implementing support of new version of VMWare vSphere in provisioning module
Fixing bugs in PnP driver for USB-devices

Responsibilities: Developer
Technologies: C++, C, VB6, Java, COM, KMDF

Senior Software Engineer, Restoring damaged SQLite databases

Duration: 2017
Summary:

Researching SQLite database structure
Fixing and improving legacy code
Implemented parsing of all kinds of SQLite pages
Benchmarking and improving performance

Responsibilities: Dev manager, Developer, Researcher
Technologies: C++

Senior Software Engineer, Cloud-based storage and analytic tool for personal sensitive data

Duration: 2016-2017
Summary:

Implemented Server’s REST API for storing, processing and retrieving user data
Implemented desktop client application with Qt for Windows and Mac OS
Fixing urgent bugs on server’s side

Responsibilities: Developer
Technologies: C++, C#, Python, .Net, boost, gtest, RPC, SQL

Senior Software Engineer, Forensic tool targeting mobile devices for Windows and Mac OS

Duration: 2013-2016
Summary:

Decomposing, refactoring, testing and documenting legacy code
Implementing new features in obtaining and analyzing useful data
Analyzing and improving performance
Researching new abilities for the product using reverse engineering
Separating functional parts of the product as separate sub-products in form of static and dynamic libraries with CLI

Responsibilities: Developer, Researcher, Acting Dev manager
Technologies: C++, C#, Python, Qt, boost, gtest, openssl, curl, CUDA, OpenCL, protobuf, tinyxml, jsoncpp

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