Blockchain Jobs

Fireblocks · United Kingdom

Builds and owns backend services and APIs for high-volume on-chain transaction flows across EVM and non-EVM chains, including DeFi protocol integrations, node connectivity and on-chain data access. Works on mission-critical infrastructure for institutional clients, optimising production systems for latency, throughput and security alongside product, protocol research and platform teams.

Chainalysis · United Kingdom

Architect and evolve scalable systems for ingesting and parsing complex blockchain data across 30+ chains, providing protocol expertise in EVM and UTXO. The role involves AI-native workflows with LLMs and agents, full SDLC ownership including production monitoring, and mentoring junior engineers alongside product managers.

Blockchain.com · London

Hands-on hybrid role building scalable security guardrails and automation across GCP, CI/CD and developer platforms, combining SRE and security disciplines. Responsibilities include least-privilege access, Terraform and policy-as-code, CI/CD gates and artifact provenance, network and perimeter hardening, SOC tooling, threat modeling and incident response support.

Blockchain.com · London

Builds backend services for a cryptocurrency trading platform, covering order management, market data processing and trade lifecycle handling in a real-time, high-volume environment. Works in Kotlin and Python, delivering REST APIs and WebSocket streams for web and mobile clients, with a focus on latency, observability and reliability alongside product, frontend and trading teams.

CPJ · Bermuda · £195,000 – £200,000 pa

Senior technical role within a financial services regulator's FinTech supervision function, turning on-chain, off-chain and supervisory data into actionable intelligence. Involves building AI-enabled analytics, predictive models, blockchain forensics tools and dashboards, and translating findings for senior non-technical stakeholders. Also covers evaluating third-party analytics and SupTech platforms and setting internal standards.

Dabster Systems Ireland Limited · London

Designs and builds enterprise-grade Java backend services, APIs and microservices for digital asset products, with a focus on high availability, security and banking-grade resilience. Implements blockchain business logic covering smart contract interactions, minting and burning, asset transfers and wallet management, and integrates custody providers and external blockchain networks. Works in cross-functional agile teams alongside architects, DevOps, security and product owners, contributing to architecture reviews and production support.

Circle · London

Lead technical solutioning for Payments and Enterprise customers across EMEA, owning discovery, architecture design, proof-of-concepts and post-sale implementation alongside Business Development, Product and Engineering. The role focuses on APIs, transaction flows, custody and settlement models for stablecoin and blockchain infrastructure, with up to 25% travel and structured market feedback into product roadmap.

Improbable Ltd. · International

Own the frontend product experience for a live decentralised exchange, shaping how it looks, feels and performs for traders. Beyond frontend engineering, you influence product decisions, architecture and the direction of future products, working with engineering, design and commercial teams in an early-stage venture.

Zodia Custody · Luxembourg

Lead first-line financial crime risk management across onboarding, ongoing due diligence, screening, transaction monitoring and blockchain analytics. Assess complex higher-risk clients including CASPs, partner custodians and correspondent relationships, and lead blockchain investigations using Chainalysis for transaction tracing, wallet analysis and exposure assessment. Provide quality assurance over case decisions and drive control improvements.

Kraken · United Kingdom

Own the product vision and roadmap for an in-house multi-tenant payments platform, spanning the shared backend and client-facing integration surfaces like hosted pages, SDKs, embedded components and direct APIs. Partner with engineering, banking and compliance teams to sequence rail integrations and bring regulatory requirements into the roadmap early, tracking metrics such as time to launch a rail and payment success rates.

Elliptic · London

Player-coach lead role owning a small data science team within the Intelligence function, setting direction, hiring, and running model governance while still writing code and reviewing methods. Work spans clustering, attribution, heuristics and labelling on large behavioural and on-chain datasets using Python, SQL, Spark or Databricks and AWS.

Chainalysis · United Kingdom

Owns and improves a Java Spring Boot data ingest service generating enriched transfers and aggregations, tuning PostgreSQL batching, indexing and replication. Also builds AWS API services handling thousands of requests per second, runs PoCs and benchmarks for next-generation architecture, and integrates LLM tooling into incident triage and self-healing pipelines.

Elliptic · London

Leads counter-terrorism financing investigations into cryptoasset use by terrorist actors and facilitation networks, validating exposure and attribution confidence. Builds typologies and detection logic, works across UN, US, UK and EU designation regimes, and briefs clients, regulators and public-sector partners. Requires OSINT, blockchain tracing and AI-assisted analysis.

Kraken · United Kingdom

Hands-on security architecture role within a small, deeply technical internal consulting group, embedded directly in engineering teams rather than offering high-level guidance. Work spans classical infrastructure security, cryptography, web3, complex Rust projects and securing next-generation AI products, including architecture design, review, security assessments and audits. Requires close remote collaboration with blockchain and product teams across the company.

Fireblocks · United Kingdom

Pre-sales role supporting EMEA sales directors with tailored product demos, workshops and Proof of Concepts for Fireblocks' digital asset infrastructure. You'll design technical solutions covering custody, tokenization, DeFi and blockchain transaction flows, lead RFP responses, and guide clients through onboarding onto MPC-based wallet infrastructure and APIs, working closely with Product, R&D and Security teams.