Aliaksei is available for hire

Aliaksei Sheshka

Verified Expert in Engineering

Network Developer

Location

Montreal, QC, Canada

Toptal Member Since

April 1, 2022

Aliaksei is a network and system automation developer with many years of experience in SRE and network automation, cloud, and on-premise deployments. He has a proven track record in designing and managing complex high availability setups and IP networking using Linux, Kubernetes, SQL, and Go. Aliaksei has been running containerized workloads since 2002.

Portfolio

Tata Communications

Linux, IP Networks, Go, Python, SQL, Networking, Border Gateway Protocol (BGP)...

Bell Canada

RADIUS, Solaris, Perl, Python, PHP, Networking, Border Gateway Protocol (BGP)...

Gameloft

IPsec, OpenBSD, Linux, Cisco, Border Gateway Protocol (BGP), IP Networks, MySQL...

Experience

Cisco - 20 years IP Networks - 20 years Border Gateway Protocol (BGP) - 20 years Linux - 20 years Juniper - 15 years Python - 13 years DevOps - 13 years Go - 5 years

Availability

Part-time

Preferred Environment

Linux, Kubernetes, Go, Python, IP Networks

The most amazing...

...thing I've developed is a BGP provisioning portal for a major telecom operator.

Work Experience

Senior Network Developer

2009 - PRESENT

Tata Communications

Developed a BGP provisioning system that abstracts various vendor routers to a unified portal.
Implemented the authentication, authorization, and accounting (AAA) solution for tier 1 IP network.
Developed the IP network telemetry collector for a tier 1 service provider.

Technologies: Linux, IP Networks, Go, Python, SQL, Networking, Border Gateway Protocol (BGP), CFEngine, SNMP, Shell, DNS, ClickHouse, Terraform, Site Reliability Engineering (SRE), DevOps, Bash, Ansible, Azure, Multiprotocol Label Switching (MPLS), gRPC, Resource Public Key Infrastructure (RPKI), Firewalls, AWK, Cisco, IPv6, PostgreSQL, Syslog, Grafana, Juniper, NGINX, Docker, Helm, ZFS, SMTP, CentOS, Debian, FreeBSD, RHEL, Ubuntu, Amazon S3 (AWS S3), MinIO, Redis, Amazon EC2, CI/CD Pipelines, GitLab CI/CD, System Administration, DigitalOcean, IP Routing, Network Administration, FRR, MariaDB, Incident Management, Monitoring, Infrastructure as Code (IaC), Continuous Delivery (CD), Git, Scripting, Amazon EKS, Network Engineering, SSL Certificates, Nagios, Linux Administration, Linux Server Configuration, Linux Server Administration, Google Cloud Platform (GCP), GitLab, Google Cloud, Networks, Dynamic Host Configuration Protocol (DHCP), Systemd, High-availability Systems, Cisco Certified Network Associate Routing & Switching, NVIDIA Cumulus Linux, Network Architecture, Containerization, Virtualization, Containers, DDoS, Junos OS, OSI Model, Content Delivery Networks (CDN), Kentik, Shell Scripting, Extreme Networks, Cisco Switches, Architecture, AWS Direct Connect, Network Automation, Direct Connect (DC), CCNP

Senior System Administrator

2009 - 2009

Bell Canada

Deployed a highly available, geo-distributed RADIUS setup.
Developed a reporting solution to detect billing anomalies.
Planned and implemented migration to a new hardware stack.

Technologies: RADIUS, Solaris, Perl, Python, PHP, Networking, Border Gateway Protocol (BGP), SNMP, Shell, DNS, Site Reliability Engineering (SRE), Bash, Firewalls, Cisco, IPv6, PostgreSQL, Syslog, IPsec, ZFS, CentOS, RHEL, System Administration, IP Routing, Network Administration, Incident Management, Monitoring, Scripting, Network Engineering, SSL Certificates, Linux Administration, Linux Server Configuration, Linux Server Administration, Networks, High-availability Systems, Cisco Certified Network Associate Routing & Switching, Network Architecture, Containerization, Virtualization, Containers, Shell Scripting, Cisco Switches, Architecture, AWS Direct Connect, Network Automation, CCNP

Senior Network Administrator

2008 - 2008

Gameloft

Developed a highly available IPsec solution to interconnect payment suppliers.
Created custom OpenBSD images with zero-touch provisioning.
Introduced sharding to a gaming MySQL infrastructure.

Technologies: IPsec, OpenBSD, Linux, Cisco, Border Gateway Protocol (BGP), IP Networks, MySQL, Apache, CentOS, Debian, FreeBSD, RHEL, System Administration, IP Routing, Network Administration, Incident Management, Monitoring, Scripting, Network Engineering, SSL Certificates, Ubuntu, Linux Administration, Linux Server Configuration, Linux Server Administration, Networks, High-availability Systems, Cisco Certified Network Associate Routing & Switching, Network Architecture, Containerization, Virtualization, Containers, Shell Scripting, HAProxy, Cisco Switches, Architecture, Network Automation, CCNP

System Administrator

2007 - 2008

Caxem

Introduced CDN to speed up image loading, which led to better conversion.
Streamlined release management using Apache Subversion (SVN) and Local Volume Manager (LVM) volume snapshots.
Developed a voice (SIP) notification solution to a monitoring system.

Technologies: NGINX, ColdFusion, SQL, Apache, MySQL, Debian, RHEL, System Administration, IP Routing, Network Administration, Incident Management, Monitoring, Scripting, Network Engineering, SSL Certificates, Ubuntu, Linux Administration, Linux Server Configuration, Linux Server Administration, Networks, High-availability Systems, Network Architecture, Containerization, Virtualization, Containers, Shell Scripting, Cisco Switches, Architecture, Network Automation

Experience

BGP Provisioning System

I was a primary developer and maintainer of the Go and Python-based portal to provide a variety of BGP sessions on a multi-vendor tier 1 ISP network.

It was a multi-year project involving multiple stakeholders. As a result, customer provisioning time was significantly reduced.

Go-based SNMP/XML-RPC Collector

A Go-based SNMP/XML-RPC collector is used to collect telemetry from routers at Tier1 ISP. Collected data after that is stored in the ClickHouse SQL database. Various analytic and alerting systems depend on that data to give insight into the network.

IPv6 Network Aggregation Tool

https://github.com/afpd/netaggregate

A C++-based IPv4/IPv6 network aggregation tool.

The implementation has no external dependencies and is used in projects where one can't run Python's IP address library due to memory and CPU constraints, i.e., embedded systems.

Skills

Languages

Bash, Go, Python, SQL, Perl, AWK, XML, PHP, C++

Frameworks

CFEngine, gRPC

Tools

Terraform, Syslog, NGINX, Apache, Amazon EKS, Nagios, Systemd, Shell, Helm, Ansible, Grafana, GitLab CI/CD, Azure Kubernetes Service (AKS), Git, GitLab

Paradigms

DevOps, Cisco Certified Network Associate Routing & Switching, DDoS, Continuous Delivery (CD)

Platforms

Kubernetes, Linux, DigitalOcean, Amazon EC2, Amazon Web Services (AWS), OpenBSD, CentOS, Debian, FreeBSD, Ubuntu, Solaris, Google Cloud Platform (GCP), Docker, Azure

Other

Networking, DNS, SNMP, Border Gateway Protocol (BGP), IP Networks, Site Reliability Engineering (SRE), Resource Public Key Infrastructure (RPKI), Firewalls, Cisco, IPv6, Juniper, ZFS, SMTP, RHEL, Rocky Linux, System Administration, IP Routing, Network Administration, FRR, Incident Management, Monitoring, Infrastructure as Code (IaC), Scripting, Network Engineering, SSL Certificates, Linux Administration, Linux Server Configuration, Linux Server Administration, Mellanox Technologies, Networks, Dynamic Host Configuration Protocol (DHCP), High-availability Systems, NVIDIA Cumulus Linux, Network Architecture, Containerization, Virtualization, Containers, Junos OS, OSI Model, Content Delivery Networks (CDN), Shell Scripting, Cisco Switches, Architecture, AWS Direct Connect, Network Automation, Direct Connect (DC), CCNP, Physics, Transport Layer Security (TLS), Multiprotocol Label Switching (MPLS), IPsec, MinIO, CI/CD Pipelines, Kentik, HAProxy, Extreme Networks, GPU Computing, ColdFusion

Libraries/APIs

RADIUS

Storage

ClickHouse, PostgreSQL, MySQL, XML-RPC, JSON, Amazon S3 (AWS S3), Redis, MariaDB, Google Cloud

Education

1996 - 2021

Master's Degree in Physics

Belarusian State University - Minsk, Belarus

Certifications

FEBRUARY 2022 - FEBRUARY 2025

Certified Kubernetes Administrator

The Linux Foundation

FEBRUARY 2019 - PRESENT

C++ Yellow Belt

Coursera

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