Core Engineer - DeFi - London (F/M/D)

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, buy-side, and sell-side experience in both Crypto and TradFi.Tasks

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, task specification, implementation, to post-production support.Core Booking / Aggregation -

Implement and enhance features in the core booking and aggregation engine (Realised / Unrealised PandL, 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.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), consistent symbology and instrument economics.Trading, risk, or back-office systems, ideally in regulated environments.International environment (English is the main language)Pension100% health coverageTeam events and offsitesRecruitment 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 ..... full job details .....