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Location
Remote (Brazil, US time zones hours)
Seniority
Junior · 2+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 28, 2026. First seen by Alion on Oct 27, 2026.

Overview
Company
Impact
Profile match
Sigma Software is a technology services company founded in 2002 as the Ukrainian development arm of the Swedish Sigma Group, and now a global organisation with delivery centres in Ukraine, Poland, Sweden, the United States and Latin America. It builds custom software for clients in advertising technology, automotive, aviation, gaming, telecommunications and the public sector, and runs its own product and startup arms alongside the services business. The company is known for keeping its Ukrainian engineering operation running through the war and for a substantial programme of technology work supporting Ukrainian defence and public institutions.

We are seeking a Technical Support Engineer to work within a highly dynamic AdTech ecosystem with the goal to protect the world from malvertising.

Being part of our team means being open-minded, friendly, and supportive, willing to take on challenges, take responsibility, and never stop learning. We must stay one step ahead of the attackers, which means being smarter, faster, and thinking outside the box.

Sound interesting? Join us!

  • Support Customers (Tier 2) in real time and provide professional technical responses
  • Analyze Customer traffic to identify undetected threats and false detections using mostly ElasticSearch and BigQuery (SQL)
  • Work side by side with Customers providing insightful incident reports
  • Communicate with global Customers and provide quick responses and resolutions
  • Work cross-functionally with RnD and Research teams to optimize Customer’s ability to detect and mitigate cyber-attacks in real time
  • Experience in customer support, including direct communication with clients; professionalism and politeness are essential
  • 2+ years of experience in the technical support domain (including working with logs and dashboards)
  • Practical knowledge of HTML and CSS is a must
  • Technical understanding of web technologies and client-server architecture (APIs, HTTP, JavaScript)
  • Experience of Kibana and BigQuery
  • Strong SQL skills: Common Table Expressions (CTE), aggregations, GROUP BY, ORDER BY, filters, window functions (e.g., RANK()), and subqueries
  • Strong troubleshooting and problem-solving skills
  • Upper-Intermediate level of English or higher
  • Willingness to work in the US time zone

WOULD BE A PLUS

  • Basic cybersecurity knowledge: proxy and NAT, WAF and Network Firewall, network security, VPN, CAPTCHAs, and CAPTCHA solvers
  • Understanding of threats: scraping, ATO or BF, scalping, AD fraud, and click fraud
  • Understanding of log analysis, APIs, client-server model, and regex
  • Experience with the Elastic Stack
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