Lean Technologies is looking for a Senior Support Engineer to initially manage the operational support for a recently acquired company in the crypto payments space. Over time, the role will expand to include support for Lean's core financial API products. This position is perfect for someone who thrives on structured problem-solving, enjoys working independently, and is deeply interested in the intersection of fintech and crypto.

What You'll Do

Serve as the primary contact for end-users and partners, responding promptly via ticketing systems, Slack, email, WhatsApp, and occasional calls.
Investigate, triage, and resolve transaction-related issues, including delayed, failed, or uncredited funds across crypto payment flows.
Analyze and verify blockchain transactions using explorers and tools; confidently trace transaction hashes, wallet addresses, confirmations, gas fees, and network status to determine root causes.
Coordinate directly with payout partners, including voice communication when required, to trace and resolve payment issues.
Prioritize incoming requests effectively, maintain clear internal documentation, and ensure timely follow-ups.
Escalate recurring issues, bugs, operational risks, and feature requests to engineering and product teams with structured context, clear reproduction steps, and impact summaries.
Participate in incident management processes, contributing to investigations, structured communication, and basic QA validation where needed.
Use internal and external tools (e.g., Postman, logs, SQL, admin panels, blockchain explorers) to investigate and resolve API and product-related issues as responsibilities expand.
Document workflows, common issues, FAQs, and resolution steps to strengthen knowledge resources and improve team efficiency.
Identify recurring patterns and proactively suggest improvements to processes, tools, and tracking systems.
Support knowledge sharing between crypto workflows and the broader Lean support team as the role expands to additional products.

What We're Looking For

Experience working with APIs; Postman experience is essential.
Solid understanding of how blockchain networks operate, including transaction lifecycle, confirmations, gas fees, wallet addresses, mempool behavior, and common failure scenarios.
Ability to read logs and understand technical systems.
Good understanding of client-server architecture and OAuth basics.
Medium-level SQL skills (SELECT, JOINs, filtering, aggregations, date functions, CASE, UNION).
Strong troubleshooting and problem-solving skills.
Experience supporting B2B or enterprise clients.
Comfortable communicating with partners over voice and written channels.
Able to work independently and take ownership of tasks.
Comfortable with ambiguity and evolving responsibilities.
Strong written documentation skills.
Fluent English (other languages are a plus).

Nice to Have

Experience in fintech (especially payments or banking).
Exposure to or strong interest in crypto/web3.
Basic QA experience.
Experience coordinating with third-party partners.

Technical Stack

Postman
SQL
Blockchain explorers

Benefits & Compensation

Competitive salaries
Private healthcare
Flexible office hours
Meaningful equity stake

Lean is proud to be an equal opportunity workplace and is an affirmative action employer. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status.