Senior front end developer html5, css, javascript Work, Jobs in Remote (with Salaries)

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Full Stack Engineer
Amber Electric —Remote
Our technology optimises thousands of batteries and other devices in the customers' homes, enabling them to time their usage to consume power at times of high…
£45,000 - £70,000 a year
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Senior Backend Engineer

Scrambly
Remote

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Job details

6 days ago

Qualifications

Azure
Go
Node.js
React
Kubernetes
System design
NoSQL
English
Google Cloud Platform
AWS
Docker
PostgreSQL
Distributed systems
Terraform
Redis
Back-end development
REST
APIs
UI
Communication skills

Full job description

About the company

Scrambly is one of the fastest-growing adtech startups in the world, featured in the AppsFlyer Performance Index and Singular ROI Index in just 3.5 years.

We’re growing 250%+ YoY across revenue, team, product, and technology — fully bootstrapped and profitable.

We’re building the future of app discovery: a reward-powered alternative to the App Store and Google Play. Our loyalty-driven ecosystem connects millions of users with the world’s top apps and delivers unmatched, ROI-focused growth for mobile advertisers.

Our mission is to build a true alternative to traditional app stores — fueled by rewards and data — and create a new, performance-first growth engine for mobile app advertisers.

About the role

We are looking for a Senior Backend Engineer to join the team building the core systems behind Scrambly. In this role, you will work across two key areas: user-facing product systems - solving complex scalability challenges for a platform serving millions of users globally, - and the internal platform, covering admin systems, tooling, and back-office automation that power our operations team.

Your focus will be on writing robust, high-performance code and bridging the gap between product requirements and technical reality. You will work within a modern tech stack to ensure our systems remain fast, reliable, and easy to maintain as we grow.

Key Responsibilities

Architecture & Development: Design, build, and maintain highly scalable Node.js (NestJS) RESTful APIs and distributed systems. Ensure seamless frontend integration and drive long-term architectural improvements.

Quality & Mentorship: Champion clean, testable code standards and foster a culture of technical curiosity by mentoring engineers through code reviews and pair programming.

Infrastructure & Performance: Monitor system reliability, resolve bottlenecks, manage containerized application lifecycles, and partner with DevOps to optimize CI/CD pipelines.

Cross-Functional Collaboration: Partner with Product, Design, and QA to translate requirements into robust technical specs, while clearly communicating technical constraints to non-technical stakeholders.

Requirements

Experience: 5+ years of software engineering experience, with a strong focus on backend development.
Tech Stack: Strong proficiency in Node.js and modern frameworks like NestJS.
System Design: Excellent system design skills and a solid understanding of backend architecture, RESTful APIs, and distributed systems.
Infrastructure: Experience with cloud platforms (GCP preferred; AWS or Azure acceptable), containerization (Docker), and orchestration/IaC (Kubernetes, Terraform, Helm).
Databases & Messaging: Proficiency with relational (e.g., PostgreSQL), NoSQL (e.g., Redis) databases, and message queues (e.g., RabbitMQ, GCP Pub/Sub, Redis Pub/Sub).
Frontend Autonomy: Hands-on experience with React, capable of implementing basic UI features for internal tools independently.
Collaboration: Strong communication and collaboration skills, comfortable working in a fast-paced team environment.
English: Upper-Intermediate or higher (B2/B2+, written and spoken). You need to be able to communicate clearly in English to work effectively in an international team and participate in architectural discussions

Nice to Have

Scale: Experience in a B2C startup that has scaled to millions of users.
Additional Stack: Basic proficiency in Go; able to read, write, and maintain basic Go services without starting to learn from scratch.

What We Offer

Work on systems where performance optimizations translate to immediate user impact for millions of users.
A culture of code reviews, knowledge sharing, and mentorship where the best idea wins.
A fast-paced environment where your code quickly translates into real user value.
We value the stability and value of what you ship, not just the number of lines of code.

By submitting this application, I agree that my personal data will be collected, processed, and retained by the company solely for the purposes of managing and assessing my candidacy.

Notice: This is a remote position based in United Kingdom.

Apply Now

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senior front end developer html5, css, javascript jobs in remote

Senior Backend Engineer

Full Stack Engineer

Technical Support Engineer

Computer Science Teacher (Primary | Secondary | Edexcel iGCSE)

System Integrator

Principal Technical Consultant

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Customer Success Engineer - EMEA

Technical Consultant - IAM/IGA

Software Sr. Engineer (SWE800)

Application Security Architect

Full-Stack Developer (Java + React / Next.js)- Poland

Application Support Engineer — Blockchain Security & AI Automation

Fullstack Software Engineer

Golang Software Developer

Software Engineer (SC)

Full Stack Engineer - MarTech

Agentic Lead Engineer (human)

Lead Software Engineer - Documentum

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