ThinkMarkets is a global financial technology company, specializing in providing multi-asset trading solutions to thousands of clients around the world. With our flagship ThinkTrader platform, we make it available for our clients to trade the world 24-hours a day. Our mission is to bridge the gap between traders, investors, and platforms by allowing access to global markets and thousands of products thus providing our clients the ability to trade the world in the palm of their hand. We use the latest technologies to give traders seamless access to our proprietary trading platforms.

We are seeking a Lead Network Engineer to join our rapidly growing global workforce in Sofia, Bulgaria. This role combines deep hands-on technical expertise with leadership in network strategy, architecture, and decision-making. You will drive the evolution and performance of our global trading infrastructure, providing technical guidance, influencing key architectural decisions, and collaborating closely with cross-functional teams. While this is not a people-management role, you will serve as a technical leader and trusted authority within the networking domain.

Responsibilities:

• Serve as a senior member of the Global Infrastructure team, providing technical leadership and architectural input on network-related initiatives
• Design and evolve global network architecture to support a highly available, low-latency trading environment
• Drive implementation of network security best practices and contribute to infrastructure hardening efforts
• Ensure network infrastructure aligns with the company’s security policies and compliance requirements
• Define and maintain infrastructure standards across the organization
• Collaborate with vendors to install, configure, and maintain L2/L3 switches, routers, and firewalls
• Manage and optimize dedicated connections between public and private cloud environments
• Provide deep expertise in performance tuning of dynamic routing protocols (BGP, OSPF, EIGRP)
• Lead performance analysis and latency optimization for mission-critical, customer-facing applications
• Participate in strategic planning for network growth, resilience, and scalability
• Contribute to disaster recovery, high availability, and security strategies in collaboration with other teams
• Proactively monitor network health and resolve performance bottlenecks or connectivity issues
• Provide mentoring and technical guidance to team members, promoting best practices and innovation
• Drive continuous improvement by identifying and implementing process enhancements
• Flexibility to respond to critical incidents outside normal working hours

Requirements:

• 5+ years of hands-on experience in network engineering roles, with increasing levels of responsibility
• Bachelor’s degree in Computer Science, Information Technology, or a related field
• CCIE certification is mandatory
• Expert-level understanding and tuning of dynamic routing protocols (BGP, OSPF, EIGRP)
• Experience with AWS solutions, and Enterprise Domain management e.g CloudFlare
• Deep experience with VPN technologies across MPLS, P2P, and other media
• Strong command of Cisco platforms (NX-OS, IOS, ASA, FirePower)
• Proficiency in redundancy and availability technologies (HSRP, VRRP, GLBP)
• Advanced understanding of the TCP/IP stack and experience with tools such as Wireshark or tcpdump
• Experience with storage networking (FCoE, iSCSI, Fibre) is a plus
• Proven ability to support and enhance latency-sensitive global networks
• Self-starter mindset with a collaborative attitude and a passion for solving complex problems
• Experience with SDN solutions such as VMware NSX is an advantage
• Strong communication skills in English, both written and verbal

What we offer:

• Highly competitive remuneration
• 25 days annual paid leave & 1 day Birthday leave
• Health insurance & Dental Care for you, spouse, and kids under 18
• Fully covered Multisport card
• Gift cards for special occasions
• Employee Assistance Program
• Referral Program
• Fresh fruits, nuts, healthy snacks, and beverages
• Modern and colorful office in the Infinity Tower, close to public transports and commodities