Blockchain Lead Engineer

London, United Kingdom | Posted on 15/02/2026

The employer is a cryptocurrency launchpad for the Solana blockchain that enables users to create tokens and trade them immediately on the platform, as well as to launch them onto decentralized exchanges. With over 6 million meme coins launched on the platform, it is one of the fastest-growing crypto applications and one of the biggest drivers of the explosive growth in memecoins on the planet.

They are hiring a Lead Blockchain Payments Engineer – Fiat Ramps in London (on‑site/in person).

As the Lead Blockchain Payments Engineer, you will be a core architect and owner of the essential financial infrastructure. You will design and scale the core services that power seamless fiat ↔ crypto flows, real‑time risk decisions, and rock‑solid financial records.

• Own the end‑to‑end payment orchestration for major bank rails (ACH/RTP/Fed Now/SEPA/Open Banking) and cards (including Apple Pay/Google Pay).
• Design and implement idempotent, fault‑tolerant APIs and robust webhook processing systems.
• Integrate and manage third‑party providers for connectivity (Plaid/True Layer/Tink), card processing (Stripe/), and on‑chain risk/compliance (Chainalysis/TRM, Travel Rule networks).
• Build and scale a real‑time risk engine (≤ 300 ms) combining ML scores, rules, device signals, sanctions/KYC hits, payment intelligence, and blockchain analytics to yield fast GREEN/AMBER/RED outcomes.
• Implement foundational KYC/AML primitives (CIP/CDD, sanctions/PEP screening, Travel Rule data plumbing) in close partnership with our Compliance team, ensuring audit‑ready decision journaling.

• Ship a double‑entry ledger and automated reconciliation jobs that accurately tie together processors, bank statements, and on‑chain balances.
• Develop daily break detection and automated remediation workflows to maintain financial integrity.

• Ensure safe and rapid crypto delivery (e.g., USDC/SOL) to user wallets by managing hot‑wallet flows, transaction creation, confirmations, and operational safeguards.

• Set the bar for reliability: implement SLOs, circuit breakers, retries/backoffs, dead‑letter queues, shadow traffic, and canary releases for all high‑risk financial flows.
• Instrument everything with traces, metrics, and logs. Build internal ops & compliance dashboards and participate in the production on‑call rotation for our 24/7 system.

• Work closely with Product, Mobile, Compliance, Risk, and Finance teams, driving features from initial concept through production deployment and iteration.

Languages: Rust, Go, Type Script/Node, Python

Messaging: Kafka/Redpanda, NATS

API/IPC: gRPC/REST

Infra: AWS (EKS, RDS, KMS), Terraform

You are a backend and onramp specialist with a passion for high‑throughput, low‑latency distributed systems and financial technology.

• System Design & Scale:
  Deep experience in high‑throughput, low‑latency distributed systems, payments, or fintech risk platforms.
• Language Fluency:
  Fluent in one or more systems languages (Rust, Go), or strong systems chops in Type Script/Node/Python.
• Database Mastery:
  Expert‑level knowledge of Postgres (transactions, indexing, locking), with familiarity in Redis and event/OLAP stores (Kafka/Redpanda, Click House).
• API Craftsmanship:
  Mastery of gRPC/REST best practices, including versioning, pagination, auth
  
  N/Z, idempotency keys, and building rock‑solid webhook consumers.
• Event‑Driven Design:
  Experience designing systems with queues, outbox/inbox patterns, Sagas, and ensuring exactly‑once‑effective behavior.
• Security Mindset:
  Practical experience with key management basics, HSM/KMS usage, secrets hygiene, least privilege, data minimization, and auditability.
• Ownership & Ambiguity:
  Ownership‑driven and comfortable operating in high‑ambiguity environments—you move quickly, measure results, and iterate.

• Open banking: Plaid/True Layer/Tink; account auth and bank‑transfer initiation.
• Compliance plumbing: sanctions/PEP screening, Travel Rule networks,…