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System analyst

Remote (EU-friendly time zones) · Self-custodial crypto wallet · FJX Tech
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We are searching for a system analyst for a next-generation global self-custodial crypto wallet with embedded virtual cards, seamless on/off-ramp flows, and a modern user experience.
We combine the security of non-custody with the convenience of everyday finance: instant top-ups, multi-chain asset management, virtual card payments, and smooth onboarding.

We are looking for a System Analyst who will work closely with founders to design core flows, document integrations, structure complex requirements, and ensure our product is technically bulletproof.

Responsibilities

System Analysis & Architecture

  • Collect, structure, and translate business needs into detailed technical specifications (BRD/FRD).
  • Design end-to-end flows: onboarding, KYC, virtual card issuance, top-ups, on-/off-ramping, non-custodial wallet recovery.
  • Prepare sequence diagrams, data flow diagrams, BPMN/UML, integration maps, and data models.
  • Define and document integration logic between mobile app → backend → external providers.

Payments & Card Features

  • Document logic for payment flows: authorization, clearing, refunds, limits, fraud scenarios.
  • Describe virtual card flows: provisioning, tokenization, 3DS/SCA, lifecycle management.
  • Identify and document fintech edge-cases (declines, partial approvals, disputes, network errors).

API & Provider Integrations

  • Work with external partners: issuer, processor, KYC/AML provider, on-ramp, blockchain providers.
  • Prepare and maintain API contracts, webhook logic, data validation rules, and mapping tables.
  • Ensure idempotency, error handling, retries, and consistency across integrations.

Product Delivery & Documentation

  • Write technical documentation that allows engineering to implement features without ambiguity.
  • Maintain structured documentation in Notion/Confluence.
  • Participate in solution reviews, UAT, and release readiness validation.
  • Break down features into well-structured user stories with acceptance criteria.

Cross-Functional Collaboration

  • Work daily with Founders (CEO/CPO/CTO), backend, mobile, design, and compliance.
  • Support incident investigation and root-cause analysis.
  • Represent the technical view in partner meetings and integration workshops.

Requirements

Must-have

  • 3+ years as a System Analyst in fintech: banking, payments, PSP, neobanking, or card processing.
  • Strong understanding of payment flows: authorization, clearing, SCA/3DS, limits, AML basics.
  • Solid experience with REST APIs, webhooks, data mapping, JSON, HTTP.
  • Ability to produce high-quality specifications, diagrams, and edge-case coverage.
  • Strong understanding of technical concepts: idempotency, retries, service communication patterns.
  • Experience with UML/BPMN and diagramming tools (Miro, Draw.io, Visio).
  • Russian and English: upper-intermediate or better.

Nice to have

  • Knowledge of blockchain fundamentals (EVM/Solana), RPC, wallet mechanics.
  • Understanding of MPC, key recovery, seed storage concepts.
  • Experience with card issuing (issuer, processor), card lifecycle, tokenization.
  • Familiarity with PCI DSS and security standards.
  • SQL proficiency for data validation.

 

Soft Skills

  • Highly structured and detail-oriented.
  • Ability to simplify complex systems and communicate them clearly.
  • Comfortable working in a fast-paced, ambiguous startup environment.
  • Proactive, ownership-driven attitude.
  • Strong communication skills for cross-team alignment.

Conditions

What we offer

  • Work on a global product, that will cover 10+ countries from FinTech, blockchain and crypto dimensions
  • Zero bureaucracy, fast decision cycles, high level of ownership.
  • Modern tech stack, strong partners, global product vision.
  • Competitive compensation (EUR/USD/crypto).
  • Remote-first team.
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