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Live · Open·AI·Specialist

Senior Software Engineer — AI Agents at a crypto-payments fintech.

Senior Software Engineer reporting to the Head of the AI Agents team. The work on this seat picks up after the agent goes unattended in production — when the on-call traffic starts arriving.

About the firm

Anonymised by default.

A crypto-payments fintech. The firm operates a crypto-funded card product and is building an agentic-finance layer alongside it. Around 90 staff across APAC, Europe, and the Americas. Profitable in its core card product; investing heavily in the agent platform.

We name a client on the mandate page only where the firm has approved publication. Where not named, the description above is intended to be enough for a senior candidate to recognise whether their pattern fits the brief.

The brief

What this seat exists to do.

Senior Software Engineer reporting to the Head of the AI Agents team. Senior IC seat with named ownership of one of the firm's agent workflow products.

Builds and maintains agent workflows that interact with the firm's payment rails — card issuance, balance management, and partner-bank integrations.

Works with the firm's platform engineering team on the underlying agent infrastructure and with the product team on the customer-facing agent surfaces.

Remote-first. Quarterly off-sites at the firm's APAC engineering hub.

What we are assessing for

  • A current senior engineer with shipped production experience on LLM-based agent or workflow systems — not just LLM-augmented features.
  • Comfort with the dual stack — the firm's agents interact with both off-chain payment rails and on-chain settlement, and the engineer has to be fluent in both.
  • Strong systems-thinking instinct. Agent reliability is a systems problem more than a model problem; the firm needs engineers who think that way.
  • Patterns: a senior engineer from a peer agent-platform firm; an LLM engineering lead from a fintech with shipped agent surfaces; a senior IC from an AI-native B2B SaaS with payments adjacency.
The firm's read

Spectrum's read on this search.

The work on this seat picks up after the agent goes unattended in production — when the on-call traffic starts arriving. Engineers who have run an agent through its first weeks of production traffic know what shows up once the demo works: retries that loop, tools that drift, traces that have to be readable at 2am, costs that move with prompt shape.

— Peter Wood, Partner & Chief Strategy Officer

Introduce yourself

Against this brief.

Spectrum holds first introductions in confidence. Your approach is read by the partner running this search before any external check. We do not share candidate identities with the client until you have agreed to be put forward.

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StatusLive · Open
IndustryAI
SenioritySpecialist
LocationRemote
PartnerPeter Wood
OpenedMay 2026
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