Top Tech Jobs & Startup Jobs in Belfast

Own and improve a high-performance distributed data-processing backend that ingests, normalizes, and reconciles on-chain and exchange data. Ensure deterministic, financial-grade correctness, performance, and availability. Lead architectural decisions, write high-quality TypeScript and Rust code, tune Postgres at scale, and collaborate with product and engineering leads to ship reliable data pipelines for crypto tax calculations.

Own Koinly's end-to-end video production: strategy, scripting, production coordination, publishing, and optimisation across YouTube and short-form platforms. Build and run a presenter and editor network, repurpose shoots into multi-format outputs, use analytics to iterate, and grow video as a measurable growth channel in a remote, async European role.

Own Koinly's social presence and community engagement across X, Reddit and other channels. Define and execute a strong, opinionated brand voice, create native platform content (posts, threads, memes, graphics, short video), and actively participate in crypto conversations. Monitor news and react in real time, respond to community questions and feedback, and build measurable engagement and share-of-voice within the first 90 days.

Own frontend features end-to-end for a high-performance crypto tax product. Optimize and refactor a complex React/TypeScript codebase, deliver new features, collaborate with product and design, ensure cross-browser pixel-perfect UI, and raise frontend engineering standards across the team.