Blockchain Engineer - London

Flow Traders is looking for an experienced Back-End Blockchain Engineer to join our growing Digital Assets Technology team. This is a hybrid role based in Amsterdam.

What you will do

• 
  
• Work closely with trading desks to develop scalable and low-latency solutions for DEX Trading
  
• Contribute to the architecture and development of high-performance, real-time trading systems for DeFi markets
  
• Encourage the team to grow our Blockchain understanding bringing in protocol-specific knowledge and best practices
  
• Develop and maintain on-chain and off-chain components, including smart contracts, indexers, and market-making bots
  
• Implement robust APIs and integrate with DeFi protocols, liquidity pools, and decentralized exchanges (DEXs)
  
• Design and optimize event-driven microservices for real-time blockchain transaction processing
  
• Ensure high availability, reliability, and security of blockchain-based back-end systems
  
• Collaborate with Quantitative Researchers, Traders, and Software Engineers to identify and implement automation and acceleration strategies for the Digital Assets desk
  
• Follow the best software engineering practices which are supported by the best working environment, latest technology and continuous support from all parts of Flow Traders organization
  

What you need to succeed

• 
  
• BSc, MSc, or PhD in Computer Science, Software Engineering, or related fields
  
• 5+ years of commercial experience in software development
  
• Strong expertise in one or more back-end programming languages: Python, Rust, Go, Java
  
• Solid experience in DeFi development (protocol interactions, arbitrage, liquidity management)
  
• Strong blockchain knowledge, including nodes, consensus mechanisms (PoW, PoS), and Web3
  
• Experience with smart contract development in Solidity and/or Rust
  
• Deep understanding of backend architecture, including scalable distributed systems, microservices, and event-driven processing
  
• Hands-on experience with cloud infrastructure (AWS, GCP, or Azure) and containerization (Docker, Kubernetes)
  
• Understanding of security best practices in blockchain and back-end development (e.g., private key management, transaction signing, API security)
  
• Familiarity with Kafka, Redis, gRPC, and WebSockets for real-time data processing
  
• Experience working with on-chain data analysis, indexers, and oracles, a plus
  
• Knowledge of MEV (Maximal Extractable Value) strategies and blockchain transaction ordering, a plus
  
• Prior experience working in low-latency, high-performance trading environment, a plus
  

Please note that we do not offer sponsorship for our London office.

Flow Traders does not accept unsolicited resumes from any professional staffing or search firms. All resumes, and any other information identifying potential candidates, submitted to any employee at Flow Traders via email, the Internet or directly without a valid and signed search agreement will be deemed free to contact by Flow Traders without any restrictions and no placement fee of any kind will be paid in the event the candidate is hired by Flow Traders.

Our Hiring Process for our Technology Teams

1. 
   
2. Applying for a role at Flow Traders — Submit your CV and a cover letter highlighting your skills, experience and qualifications relevant to the position.
   
3. Complete an online assessment — Shortlisted candidates will be invited to complete a HackerRank test.
   
4. Interview with a Recruiter — Shortlisted candidates will then have an interview with a Recruiter to assess business knowledge, motivation and cultural fit.
   
5. Technical assessment & final interview — The next step is to meet your team to discuss previous experience, technical skills, and relevant knowledge.
   

What We Offer

No matter where you’re based, we offer great perks and benefits.

Attractive Compensation

Remuneration package comprised of a base salary and a discretionary variable component.

Continuous Learning and Development

Dedicated academy with endless personal and functional development opportunities.

Exceptional Events and Social Activities

Annual company trip, holiday parties, family and sports events. There is something for everyone!

Employee Foundation

Volunteer programs for employees and charity support initiatives through the Flow Traders Foundation.

Global Rotations Opportunities

Opportunities to work in different locations to support personal growth within the company and develop your career.

Great Global Locations

Vibrant working environments, furnished with lounges, bars, gaming areas and offering lunches and coffee.

Wellness and Healthy Culture

Active lifestyle promoted by offering sports, healthy food and wellbeing programs.

Working with Great Minds

Informal working environment, with a focus on direct and open communication, entrepreneurial spirit and a driven atmosphere.