Wintermute - Full Stack Engineer

Remote - London3w ago

Remote Senior EMEA Health Insurance Insurance Full Stack Engineer React Full Stack REST Go WebSocket

Requirements

• 5+ years of software development experience across both backend and frontend. • Strong backend engineering skills, with Go and/or Python preferred; comfortable designing and implementing services, REST/WebSocket APIs and their data models. • Solid working knowledge of the frontend stack: JavaScript and TypeScript, the Node.js/npm ecosystem, and a modern framework — React.js ideally, though experience with a comparable one is fine (please feel free to share any available examples of applications you built). • Experience in client-facing financial or other professional services products is preferred but not mandatory (please mention products you worked on and their intended target users); fintech or crypto domain experience is a plus. • Good understanding of the infrastructure applications run on: CDN, Cloudflare or similar, web servers, containers, CI/CD, plus basic monitoring and logging. • Hands-on experience with a major cloud provider, AWS preferred (e.g. EC2/ECS, S3, IAM, VPC networking, load balancers); infrastructure-as-code such as Terraform is a plus. • Working knowledge of relational databases and caching, including schema design and writing efficient queries. • Experience developing secure code end to end: strong understanding of common vulnerabilities such as cross-site scripting, cross-site request forgery and other OWASP risks, along with authentication, authorisation and secrets handling, and best practices for testing and mitigating them. • Solid grasp of frontend-backend integration, including asynchronous request patterns and streaming real-time data to the browser.

Responsibilities

• A vibrant working culture with frequent team meals, holiday celebrations, gaming events, and company-wide outings. • A Wintermute-inspired office in central London, featuring an array of amenities such as table tennis and foosball, personalized desk configurations, a cozy team breakout area with games and free food. • Great company culture: informal, non-hierarchical, ambitious, highly professional with a startup vibe, collaborative and entrepreneurial. • A performance-based compensation with a significant earning potential alongside standard perks like pension and private Health insurance. • Although we are unable to accept fully remote candidates, we support significant flexibility in regards to working from home and working hours. • We offer UK work permits and help with relocation. • We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.