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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Polyglot Engineer (JS/Python/Go) - **Company:** YLD - **Location:** London, UK - **Experience:** Expert - **Salary:** £52,637.0 - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Artificial Intelligence, Amazon Web Services, Microsoft Azure, Cloud Computing, Continuous Integration, Database Design, Software Debugging, Fault Tolerance, Python (Programming Language), NoSQL, Performance Tuning, Queueing Systems, RabbitMQ, Redis, Responsive Web Design, System Testing, TypeScript, Web Application Frameworks, Alwayson, Google Cloud, Load Balancing, ReactJS, Caching, Cloudformation, Fastapi, Event Driven Architecture, Containerization, Kubernetes, Apache Kafka, Build Tools, Graphql, Api Design, Terraform, Docker - **Published:** September 5, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5871135750 ## About the Role * Proficiency in JavaScript/TypeScript, Python, and/or Go, with the ability to rapidly learn new languages; * Experience with modern frameworks across the stack (FastAPI, Gin, Express, etc.); * Production experience with React, modern build tools, state management, responsive design, and accessibility standards; * Comprehensive testing experience (unit, integration, E2E, security) and performance optimization; * Scalable system design patterns, load balancing, and high-availability architectures; * Database design and optimization (both relational and NoSQL); * API development (REST, GraphQL, gRPC) and event-driven architectures; * Caching strategies and message queue systems (Redis, Kafka, RabbitMQ); * Cloud platforms (AWS, Azure, GCP) with containerisation (Docker, Kubernetes); * CI/CD pipelines and Infrastructure as Code (Terraform, CloudFormation); * Monitoring, observability, and performance optimisation tools; * You can keep a cool head when debugging production issues; * Use AI tools to augment your work, applying sound judgement to adopt emerging technologies where they genuinely add value and increase your impact as an engineer. * Self-motivated, proactive and always looking for ways to improve and develop yourself; * A good communicator, both in writing and verbally. You'll be able to explain technical ideas and concepts in business-friendly language. * Detail-oriented; * Possess strong problem-solving skills that balance innovation with pragmatic technology choices to solve business needs; * Used to working in a team-oriented, collaborative environment; * Analytical and problem-solving-oriented; * A genuine believer in diversity and fairness. ## Description As a Senior Software Engineer at YLD, you'll be part of a client team building innovative products. We're looking for someone curious, passionate, driven, and enthusiastic. You should be skilled in problem-solving and experienced in designing scalable, resilient, and fault-tolerant architectures. You're also an effective communicator and a strong team player. Together with your team, you'll thrive in a fast-paced engineering environment, delivering outstanding results and exciting projects. * Crafting excellent products! You will be building new features that meet the needs of our clients and customers; * Continuously delivering changes to products, as our client is moving to a full CI/CD model; * Working closely with your team, regularly collaborating and on engineering initiatives, to continually push yourselves to be better; * Learning, growing, and mentoring the engineering team to accelerate their career growth and encourage them to progress; * Working with the Lead to architect, design, build, and deliver highly available, always-on, zero downtime products; * Being responsible for the production operation and monitoring of products in line with SLAs; * Driving good practices within your team, making an impact on the whole department; * Participating in regular show and tells, promoting your work to both your department and the wider company. ## Related Videos - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [NoSQL Data Modeling for Front-end Developers](https://www.wearedevelopers.com/videos/297-nosql-data-modeling-for-front-end-developers) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 119 - ❤️ === ❤️](https://www.wearedevelopers.com/magazine/454-dev-digest-119) - [Dev Digest 131 - AI'm not sure about OSS](https://www.wearedevelopers.com/magazine/472-dev-digest-131-ai-m-not-sure-about-oss) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Dev Digest 138 - Are you secure about this?](https://www.wearedevelopers.com/magazine/486-dev-digest-138-are-you-secure-about-this)