Core Engineer DeFi London (FMD)

Flowdesk; Greater London; On-site; GBP 100,000 - 125,000; Full time

Job summary

A global financial institution for digital assets seeks a Core Engineer to join their team in London. The role involves developing a back office system, enhancing features, and integrating decentralized protocols. Candidates should have a strong programming background in languages such as Go, C, and Java, and familiarity with DeFi implementations. This position offers a dynamic work environment with a focus on building reliable and scalable financial systems.

Benefits

International environment

Pension

100% health coverage

Team events and offsites

Qualifications

• Experience with delivering scalable, reliable systems in production.
• Comfortable partnering with internal stakeholders across various departments.
• Familiarity with cloud environments like GCP, AWS, or Azure.

Responsibilities

• Integrate on-chain data and decentralized protocols.
• Enhance features in the core booking and aggregation engine.
• Automate reconciliation of trading and treasury activity.
• Gather requirements from internal users to refine reports and milestones.
• Expose well-versioned APIs and maintain backward compatibility.

Skills

Lifecycle knowledge of crypto asset classes

Hands-on integration with DeFi protocols

Strong OO programming background

Experience with Typescript and Python

API design and versioning

Tools

Postgres

Go

C

Java

Rust

Job description

Overview

Flowdesks mission is to build a global financial institution for digital assets one designed from the ground up for market integrity and efficiency. To achieve this in a rapidly evolving market we apply a disciplined first-principles approach to everything we do.

This approach is embedded in our core services from institutional liquidity provision trading solutions OTC execution to our comprehensive treasury management offerings. This is how we cut through the noise and build robust and scalable systems across all our business lines.

We seek individuals who are driven by this systematic approach. Joining Flowdesk means you will be a key contributor in building and scaling a more transparent and efficient financial markets infrastructure.

Flowdesk is scaling fast and behind every world-class trading operation is a core engineering team who provide the single source of truth and a scalable platform for business units to leverage. We are hiring a Core Engineer to join the team and help lead the design and delivery of a new internal platform.

Mission

Be a key player in the newly formed Core Engineering team at Flowdesk to build a world class back office system which will serve as the backbone for Flowdesk's systems. Work alongside a seasoned team with deep product buyside and sellside experience in both Crypto and TradFi.

Responsibilities

• DeFi Integrations - Collect all necessary on-chain data and integrate with decentralized protocols to power an accurate real-time back office system. You will be responsible for ensuring management has a comprehensive up-to-date view of all on-chain assets. This includes owning the full process from requirements analysis to task specification, implementation to post-production support.
• Core Booking / Aggregation - Implement and enhance features in the core booking and aggregation engine (Realised / Unrealised P&L, Balances, etc) ensuring performance, reliability and correctness.
• Reconciliation - Automate reconciliation of all trading and treasury activity across the firm implementing data feeds from internal systems, banking, exchanges and custodians.
• Reporting - Work closely with the Finance and other internal users to gather and refine requirements, plan milestones, demo progress and coordinate cutovers from manual / legacy workflows.
• Data products and APIs - Expose well-versioned APIs and event streams for downstream consumers; maintain backward compatibility and schema evolution.

Ways of working

• Follow established architecture and coding standards; participate in RFCs / design reviews and propose incremental improvements within existing patterns.
• Write clean well-documented code and meaningful tests.
• Contribute to PR reviews; maintain up-to-date technical docs and diagrams.
• Own components end-to-end from spec to production support.

Requirements

Must Haves - Experience

• Lifecycle knowledge of crypto asset classes: spot, perpetuals, futures and options (including DeFi implementations).
• Hands-on integration with DeFi protocols (DEX / AMM lending derivatives) such as Uniswap v3 Curve Aave.
• Proven track record delivering scalable reliable systems in production.
• Comfortable partnering with internal stakeholders across Trading Ops Compliance and Engineering.

Must Haves - Technical

• Strong OO background in one or more Go, C, C#, Java or Rust.
• Experience with Typescript and Python.
• API design (versioning, backwards compatibility, observability).
• Postgres schema design and query optimization.
• Experience with message queue / pub-sub systems.
• Familiarity with cloud environments (GCP, AWS, Azure), modern CI / CD and containerization.

Nice-to-Haves - Experience

• Built or maintained position-keeping / accounting systems (PnL accounting methods, pricing greeks).
• Centralized reference data platforms (assets, networks, instruments) with consistent symbology and instrument economics.
• Trading risk or back-office systems ideally in regulated environments.

Benefits

• International environment (English is the main language)
• Pension
• 100% health coverage
• Team events and offsites

Recruitment Process

• HR interview (30)
• Technical interview - Hiring Manager (30)
• Take home assignment Live coding session (90)
• Team Member Technical (45)
• CTO (45)
• Chat with the Head of People (30)

Key Skills

Laboratory Experience,Vendor Management,Design Controls,C / C++,FDA Regulations,Intellectual Property Law,ISO 13485,Research Experience,SolidWorks,Research & Development,Internet Of Things,Product Development

Employment Type : Full-Time

Experience : years

Vacancy : 1