Technical Support Engineer, L3

Sumsub

Technical Support Engineer (L3) providing support for B2B clients on the Sumsub platform. Focused on troubleshooting issues, collaborating with teams, and developing custom solutions.

Posted 4/14/2026full-timeRemote • ⛩ Anywhere in AsiaMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

SQL

About the role

Key responsibilities & impact

Providing technical support, configuring, and troubleshooting issues with the Sumsub platform for our B2B clients.
Performing a technical analysis of reported problems and defining plans for resolving them.
Interacting daily with other engineers to provide technical action plans or take ownership of cases that require escalation.
Collaborating closely with other teams to answer clients’ technical questions, acting as a liaison between the client and internal Sumsub resources.
Communicating with clients using chat, email, and outbound calls.
Developing and implementing custom solutions involving simple scripting or coding.

Requirements

What you’ll need

Fluent in English & Mandarin.
Experience troubleshooting web applications.
Basic understanding of programming fundamentals (e.g., data types).
Practical experience troubleshooting web applications that use RestAPI.
Practical experience working with SQL-like databases.
Simple scripting skills using the language of your choice.
Basic HTML and CSS experience.
Willingness to provide excellent support service.
Familiarity with Kibana or the Elastic Stack is a plus.
Proficiency in supporting/working with mobile or web SDK is a plus.
Hands-on expertise with Postman or practical exposure to API troubleshooting is a plus.
Background in technical support for web or mobile applications is a plus.
Understanding of crypto, fintech, banking applications or services is a plus.

Benefits

Comp & perks

Remote-first, trust-based culture.
Extra time off.
Your birthday is a holiday here.
10 personal days each year.
Seven sick days without paperwork.
Extra time to enjoy Christmas and New Year.
Work that matters.
Fair and transparent pay.
Truly global with teammates and customers from all over the world.
Clear goals, open feedback and personal development plans.
Team offsites with expenses covered.
Getting set up with needed tools and hardware.
Friendly culture embracing individuality and different perspectives.

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

troubleshootingweb applicationsRestAPISQLscriptingHTMLCSSPostmanAPI troubleshootingtechnical support

Soft Skills

communicationcollaborationproblem-solvingclient liaisonownershipsupport servicetechnical analysisescalation managementinterpersonal skillswillingness to help