Senior Fullstack Engineer (SolidJS/React + Java Spring Boot) | Midshift | Remote

ZigZag is looking for a Senior Fullstack Engineer to join our team!

*Midshift working schedule
*Stack: React + Java Springboot


Role overview:
We need a true senior full-stack engineer who will own end-to-end delivery of real-time video + AI features on our sports content platform. This is a high-ownership, low-ego role in a small, high-trust team.

Core day-to-day stack:

• Backend: Java 21, Spring Boot 3, Kafka, Postgres (Aurora), Gradle, Docker, Terraform
• Frontend: SolidJS/React with TypeScript, TanStack Table, TailwindCSS, Zod, hls.js
• Infra: AWS (ECS Fargate, MSK, CloudFront, MediaPackage, Lambda)
• AI: Heavy daily use of Cursor / Claude / Grok / Continue.dev + production LLM integration

Must-have (non-negotiable):

• Proven production experience shipping with Java Spring Boot + SolidJS (or very strong React + signals and willingness to switch Day 1)
• Already using AI tools daily as a genuine co-pilot (we will ask for your exact setup)
• Has integrated LLMs in production (OpenAI, Anthropic, Grok, Gemini – prompting, RAG, function calling)
• Writes clean, tested, documented code (≥80% coverage, OWASP-aware, meaningful commits)
• Comfortable working in a fast-moving, iterative, agile environment where delivery, clarity, and ownership matter

Strongly preferred (fast-track)

• DASH, RTMP/SRT ingest, WebRTC, LL-HLS, MediaLive/MediaPackage experience
• ShedLock, Liquibase, Ably, solid-apexcharts, m3u8-parser, jbcrypt, Lombok
• Sports / live-event / real-time media background
• Built and shipped HLS-based video streaming at scale (manifests, adaptive bitrate, signed URLs, CloudFront)

Candidate profile we want:

• Moves ahead of trends, hates manual work that AI can solve
• Never says “that’s not my job”
• UK or EU timezone, excellent communication
• Eager to learn and is aware of professional and technical blind spots.
• Works Hard & Smart

ZigZag is committed to building a diverse, inclusive, and equitable workplace. We believe that talent knows no borders, and we welcome individuals from all backgrounds to help us shape the future of work. Guided by transparency and agility, we foster an environment where everyone is valued and empowered to thrive.

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