Blockchain Payments 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).

Missions

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.

Payment Orchestration & Integrations

• Own the end to end payment orchestration for major bank rails (ACH/RTP/FedNow/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/TrueLayer/Tink), card processing (), 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.

Financial Integrity & Reconciliation

• 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.

Blockchain & Wallet Operations

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

Reliability & Instrumentation

• 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.

Cross Functional Collaboration

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

Stack

Languages: Rust, Go, TypeScript/Node, Python

Messaging: Kafka/Redpanda, NATS

API/IPC: gRPC/REST

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

Requirements

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

Essential Qualifications

• 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 TypeScript/Node/Python.
• Database Mastery: Expert level knowledge of Postgres (transactions, indexing, locking), with familiarity in Redis and event/OLAP stores (Kafka/Redpanda, ClickHouse).
• API Craftsmanship: Mastery of gRPC/REST best practices, including versioning, pagination, authN/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.

Nice to Have (Signal Boosters)

• Open banking: Plaid/TrueLayer/Tink; account auth and bank transfer initiation.
• Compliance plumbing: sanctions/PEP screening, Travel Rule networks, SAR/STR workflow integration.
• Crypto delivery: Solana RPCs, USDC flows, wallet ops, Chainalysis/TRM integrations.
• Accounting: double entry ledgers, reconciliation jobs, and data modeling for regulatory/tax reporting (e.g.,1099 DA/DAC8).
• Contract: Permanent role (on site/in person) in London (UK).
• Work essentials: MacBook Pro, iPhone, AirPods, screens, headsets, and cables are provided on Day 1.
• Training and coursework in Crypto, Blockchain, Security, coding languages and other topics are paid for on demand to encourage personal and professional growth.
• Events: fully funded attendance at fintech, blockchain, or related conferences.
• Teams retreats/meetups/seminars/conferences all around the world to get to meet in person and foster meaningful connections.
• Benefits: healthcare and life insurance, retirement plan, sponsored transportation, gym, lunch card, home office equipment, and other perks.