Anar's personal web page

JAVA DEVELOPER • SOFTWARE ENGINEER • NETWORK ENGINEER

As an accomplished software, system, and network engineer with 10+ years of experience in IT. Hands-on expertise extends to engineering, evaluating, developing, and implementing large-scale solutions that impact operations. Technical proficiency spans Software Development, Networks, and Cloud environments, enabling comprehensive and innovative solutions for diverse challenges.

Programming Languages: Java, JavaScript, Python, C++, Bash, HTML
Frameworks, Services, and Tools:OOP, Design patterns, Spring framework, Servlet, Spring MVC, JSP, Thymeleaf, Spring Boot, Spring Cloud, Spring Security, Spring Data, JPA, Hibernate, Eureka, Zipkin, ELK, GraphQL, JUnit, REST API, SOA, Microservices, MQs, Kafka, CSS, Express.js, Node.js, React.js, SDLC, Git, Jenkins
Databases:SQL, MySQL, PostgreSQL, DynamoDB, MongoDB
Cloud Computing:AWS (VPC, EC2, ALB, ASG, IAM, RDS, S3, SNS, SQS, Lambda, DynamoDB, Elastic Beanstalk, API Gateway, IAM, CloudFront, Route 53, CloudWatch, CloudFormation)
Servers and Load Balancing:Nginx, Apache, Apache Tomcat, VMware vSphere / vCenter, Docker, Kubernetes
Computer Networks: TCP/IP, IPv4, IPv6, Routing (OSPF, IS-IS, BGP), Switching (L2/L3, RSTP, EtherChannel), Higher Redundancy (HSRP, VRRP, GLBP), Load Balancing (L3 Network Layer, L4 Transport Layer, and L7 Application Layer), Tunneling (L2TP, PPTP, IPsec, LDP, L2/L3 MPLS, DMVPN, VPLS, VPWS), BRAS (PPPoE, IPoE), Network Security (ACL, Firewall, IPS), Wireless (802.11a/b/g/n/ac, CAPWAP), SNMP, Cisco Netflow
Network Vendors:Cisco, ZTE, Checkpoint, HP, DLink, MicroTik, Fortinet, PaloAlto, Dell, HP, Ubiquiti
System Services:DNS (Bind, PowerDNS, DNSSEC), Network Monitoring (Cacti, LibreNMS, NfSen, Prometheus)
Automation:Ansible, Puppet, Chef, PyATS, AWS CloudFormation

PROFESSIONAL EXPERIENCE

Software Engineer at Advantis Global Inc, USA • Nov 2022 – Feb 2023
Technologies used: Nginx, JavaScript, AWS (VPC, EC2, NLB, CloudFormation), Docker, Kubernetes, Groovy, Coyota, and Roadrunner

Contracted to Apple, and worked on the cloud infrastructure of the Apple online store.

Implemented and configured Nginx servers within various platforms.
Prepared automation scripts to manage Nginx servers across development, production, and test environments.
Managing the heavy load of the online store, with its comprehensive set of features for web serving, reverse proxying, caching, load balancing, and media streaming, highlights the importance of having a reliable and high-performance server in such a critical service.

Our team has been working on soft infrastructure automation for several years, We moved our AWS cloud formation Infrastructure as a Code (IaC) automation from Terraform to Coyota and Roadrunner. My time at Advantis Global Inc. and the opportunity to work on Apple's cloud infrastructure further honed my skills as a software engineer and provided me with invaluable experience in cloud-based solutions and web services. The exposure to cutting-edge technologies and working on such a high-profile project contributed significantly to my professional growth and expertise in the field.

Software Engineer at Educational IT Center, Ulaanbaatar, Mongolia • Jun 2016 – Oct 2021
Government organization dedicated to ensuring sustainability and development of Mongolian education sector.

Technologies used: Java/J2EE, Spring, Spring Boot, Spring MVC, Spring Cloud, Spring Security, JPA, Hibernate, SQL, NoSQL, JavaScript, NodeJS, ReactJS, MQs, Kafka, GraphQL, Git, Jenkins, Docker, Kubernetes, VMWare vSphere, vCenter, AWS.

Worked on nationwide educational information systems (https://itc.edu.mn, https://esis.edu.mn) in Mongolia.

Being actively involved in the complete software development (SDLC) life cycle from inception, planning, designing, coding, and testing to project closure. Focused on intranet, Internet, and standalone application design, development, maintenance, and production support in an n-tier architecture.
Designed and developed scalable and high-performance microservices using Java, Spring Boot, and Spring Cloud, improving system reliability and reducing latency. Integrated them using MQs, Kafka, REST APIs, and GraphQL.
Building REST APIs and exposing them for other internal services to consume over HTTP, fostering efficient communication and integration within the IT ecosystem.
Building Single-page applications using JavaScript, and ReactJS.
Contributing to CI/CD integration design and development using Git and Jenkins.
Designing and maintaining logical and physical infrastructure of systems using VMware vSphere, vCenter, AWS, and Docker

My time as a Software Engineer at the Educational IT Center allowed me to make significant contributions to the development and maintenance of essential information systems supporting education across the country. The experience gained in building nationwide solutions and leveraging modern software development practices has been invaluable to my professional growth. I participated in developing Educational Information systems covering all Mongolian public educational organizations.

Network/System Engineer at Educational IT Center • Aug 2000 – Jun 2016
National research and education network serving all of Mongolia

Technologies used: Cisco ISR, ASR, CSR, Cisco Catalyst and Nexus switches, ZTE ZXR, Load Balancers, Cisco Firewalls, Security Appliances, IPS, Fortinet, Mikrotik router boards, WLC, Wireless devices, OLT, ONU, BRAS, TCP/IP, IPv4, IPv6, ICMP, NAT, DHCP, BGP, OSPF, EIGRP, STP, LACP, SHRP, VRRP, GLBP, VLAN, MPLS, IPSEC, GRE, DMVPN, VPLS, VPWS, SNMP, AAA, RADIUS, PPPoE, IPoE, Controller-based Wireless, Python, PyATS, Bash, Ansible, Vmware vSphere, vCenter, AWS

Responsible for the network, system infrastructure, and operations of the "Erdemnet" NREN in Mongolia

Led a large-scale initiative to integrate and overhaul the network and system infrastructure and provided intranet and internet services for the nationwide education sector throughout Mongolia.
Created, designed, and implemented network solutions and managed network resources (IPv4 / IPv6 addresses, domain names) across core, distribution, and access networks with multi-vendor devices in a nationwide scope.
Implemented and configured static and dynamic routing, OSPF, and BGP with manipulation, and routing policy across routers between interior and exterior autonomous systems as transit AS.
Conducted network audits, ensuring network stability and security.
Operated web and email hosting services and registered domain names in the “edu.mn” zone.
Mentored and trained junior engineers
Designed and maintained virtual and physical infrastructure of systems using VMware vSphere, vCenter, Docker, and Kubernetes in the organization's data center and the cloud environment.
Network automation and testing using Python and Shell scripting, PyATS, and Ansible.

All my professional achievements related to computer networks are inextricably linked with the “Erdemnet” Mongolian educational network. Following the development of information technology, the infrastructure of Mongolia's educational network “Erdemnet” was established in 2000. Initially, we provided Internet services by connecting about ten universities and colleges in Ulaanbaatar using a radio modem network. In 2005, we upgraded our old wireless connectivity to fiber optic infrastructure in the scope of the central districts of UB. Near In 2010, a private tech company completed the project connecting about 160 public schools and educational organizations in all province centers of Mongolia to the Internet. After a while, a significant task was carried out to integrate these networks of province centers into our network through a third networking company. In this work, I introduced a network solution related to the MPLS L3 VPN tunnel and implemented my solution. Starting in 2015, the project of connecting about 600 public schools in nationwide scope to the network was carried out by a foreign company that won the government tender. After a while, we organized the extensive work of integrating this independent network with our base network. As a result, Mongolia's education network has become a unified network connecting more than 670 schools with centralized management. My contribution was managing the entire integration process by creating network architecture and interconnection solutions at all network tiers.

Connection of the Mongolian NREN with Trans Euro-Asian Information Network (2020-2021): Made network design of our autonomous system to connect to TEIN, Our autonomous system became a transit autonomous system to connect with other autonomous systems of providers, exchange points, peerings, and clients (Mongolian Universities, Colleges, and all of the secondary schools) using BPG manipulation technics such as (eBGP, iBGP, route map, route policy with as-path and prefix-set).

Instructor, Instructor trainer (part-time) at Cisco Networking Academy • Sep 2004 – Oct 2021

Co-founded “Erdemnet Training Center” NGO, and achieved official authorization as Cisco Academy, Academy Support Center, and Instructor Training Center.

Supported the creation of other Cisco Academies in Mongolia and trained the next generation of instructors.
Certified to teach Cisco CCNA R&S, CCNP R&S, IT Essential, CCNA Cybersecurity Operations, and DevNet courses, and regularly organized and taught these and other new courses released from Cisco Academy.
Consulted and led over 30 projects for making a network and system design, solutions, and implementation.

Co-founded Mongolian Network Operation Group (2018-2021)

Organized mnNOG1(2019), and mnNOG2(2020) events (conferences and workshops) support of NSRC (Network Startup Resource Center) and APNIC (Asian Pacific Network Information Center) in Mongolia. Taught the role of assistant teacher in the Routing Infrastructure and Security Operations Workshop.

10G Core network implementation in Mongolian Telecommunication Company (08/2016 – 12/2016)

Made design of the core network and configured Cisco ASR 9006, ASR 903 routers, switches, etc. by installing relevant service licenses, configuring ISIS, BGP, EFP, LDP, and VRF protocols, organizing an MPLS VPN network, creating L2 VPN connections such as VPWS, VPLS, and L3 VPN connections, setting up cross connections, as well as organizing BNG PPPoE services, AAA RADIUS, QoS, Manual configuration of CoA and ACL Based Forwarding (ABF). In addition, the above configuration and BNG PPPoE service were put into testing operation and supervised the phased transfer of users to the new service.

Network implementation in Altan Joloo Group Company (04/2018 – 06/2018)

Designing a new network solution for the Central office and 14 branches of the “Sansar” supermarket. The solution covers the physical and logical design of SAN, LAN, WAN, and secure interconnection between branches. Consulted the appropriate devices for the whole network upgrade to the client. I implemented many features and services such as Cisco StackWise, Etherchannel, IPSEC, DMVPN, mGRE, NHRP, EIGRP, DHCP, capwap in Cisco WLAN Controller, Routers, Switches, and Checkpoint firewall. After implementation, I tested and monitored network operations in real life.

Network upgrade of Altai Holding group (04/2016 – 09/2016)

Meeting the network interconnection and topologies of central and branch networks of Altai Holding group. So give some advice for improving network performance, and configure some required configuration of network devices. Therefore consult on how to establish a network for the new opening 6-floor E-Mart shopping center building including the topics of horizontal vertical and physical network infrastructure, data center room standards and appliances, design of logical and physical network topology, choice of vendor, network devices and technology such as solution for Controller based WLAN, switched network.
Also done monitor implementation work of agent company. I managed the operation of the network transition from the old network to the new network infrastructure. Consult on a network for the new opening 6-floor “E-Mart” shopping center building, including horizontal vertical, and physical network infrastructure, data center room standards, and appliances. Designed logical and physical network topology, choice of vendor, network devices, and technology such as solutions for Controller-based WLAN, and switched network. I led the operation of the network transition from the old network to the new network infrastructure.

EDUCATION

• Master of Science in Computer Science (Oct 2021 - Jun 2024): Maharishi International University - Fairfield, IA, USA

Key Courses: Fundamental Programming Practice, Modern Programming Practice, Web Application Programming, Algorithms, Cloud Computing, Enterprise Architecture, Software Architecture, Database Management System, Web Application Architecture, Advanced Software Development, Project Management

• Master of Computer Science in Software Engineering (Jan 2002): Mongolian University of Science and Technology - Ulaanbaatar, Mongolia

Key Courses: Natural Language Processing, Advanced Technology in Software Engineering, Network Architecture, and Design, Formal Methods for System Development, Object-Oriented Analysis

• Bachelor of Computer Science in Software Engineering (Jun 2000): Mongolian University of Science and Technology - Ulaanbaatar, Mongolia

Key Courses: Academic Courses: Algorithms, Programming Languages (Pascal, C++, Assembly), Data Structures, Operation Systems, Database Management Systems, System Analysis and Design, Computer Networks, Special Topics in Computer Science, Image Processing, Introduction to AI, Computer Graphics, Principle of programming languages, Modeling, and Simulation, Visual Programming (Delphi, Visual Basic)

ABOUT ME

Born and raised environment

I was born in Ulaanbaatar, the capital of Mongolia. Ulaanbaatar means Red Hero, and this is where the image of a communist society comes into play. I've been curious since I was a child, trying to figure things out. Why? I used to bomb adults until they got tired of it. At that time, in addition to my studies, I read a lot of books on fairy tales, literature, and cognition. There was no internet, no websites, no social networks.

As a pupil, I was more interested in Mathematics, Physics, Chemistry, Biology, and History, but I was less interested in sociology and foreign languages. At that time, Mongolia was socialist-oriented, and in 1990, the transition to democracy took place, so I consider myself a witness to that transition. From a child's point of view, there was plenty of food at that time, but suddenly the store shelves were empty and there was a shortage of food. I remember having to wait in long lines to get food.

Academic Education and Professional Career

As a pupil, I excelled in nature science, so I decided to pursue a degree in technology. I successfully passed the entrance exam and entered the Mongolian Technical University to pursue a bachelor's degree in computer science. I received my basic education for free, but my parents paid a cost for me to get a higher education. Whenever possible, I worked part-time during the summer to supplement my tuition.

Project diagram

I hosted this single-page Web Application in an AWS cloud using its serverless architecture