React remote Work, Jobs in London (with Salaries)

Principal Software Engineer
Simple Machines —London
- Full-time
- Hybrid work
- Agile
Quick apply
Senior Software Engineer
Genius Sports Group —London
- Hybrid work
- English
- C++
- Maths
Product Reliability Engineer
Pinpoint —London
- £60,000 - £70,000 a year
- Full-time
- In-person
- AI
- Annual leave
Quick apply
Senior Mobile Engineer
Nory —London
- Full-time
- Hybrid work
- APIs
- AI
- Restaurant
- Annual leave
Principal Backend Engineer
Synthesia —London
- £200 a month
- Full-time
- Hybrid work
- Leadership
- Communication skills
Senior Engineer
Leisure Employment Services —Hemel Hempstead
- Part-time
- Travel
- AI
- Employee discount
Quick apply
13d
Mobile Design Engineer
kraken —Cyprus Station
- Full-time
- English
- AI
Senior Full Stack Engineer - PHP
Creditstar —London
- Full-time
- Hybrid work
- Software troubleshooting
- AWS
- Financial services
Quick apply
Blockchain Engineer (Rust, Cuda, Cryptography, Wasm)
Arena Entertainment —London
- Remote
- AI
- Communication skills
7d
Senior Staff Engineer
ZigZag Global —London
- Full-time
- Remote
- English
- Annual leave
Quick apply
7d
Senior Fullstack Engineer
OAG Aviation Worldwide —London
- Remote
- Machine learning
- Mentoring
- AI
Senior Full Stack Java Developer
Version 1 —London
- Full-time
- Agile
- SDLC
- Employee assistance programme
- Employee discount
Quick apply
Senior Software Engineer - FTC
Public Library of Science —London
- £65,000 - £142,000 a year
- Remote
- Computer Science
- Bachelor's degree
- Machine learning
- Annual leave
Senior Software Engineer
PayPoint —Welwyn Garden City
- Full-time
- Hybrid work
- Master's degree
- Databases
- Continuous improvement
- Employee discount
Quick apply
Senior Engineer
Hudl —London
- Hybrid work
- Mentoring
- Training & development
- Annual leave
- Employee assistance programme
Quick apply
Senior Kotlin Engineer
Lendable —London
- Full-time
- Hybrid work
- AWS
- Software development
- APIs
- Work from home
- Referral programme
Senior Software Engineer (JVM, Kotlin)
Simple Machines —London
- Full-time
- Hybrid work
- Agile
Quick apply
Senior Kotlin/JVM Engineer
Lendable —London
- Full-time
- Hybrid work
- AWS
- Software development
- APIs
- Referral programme
Senior Backend Engineer (Node.js) - London
Tesco UK —Welwyn Garden City
- Full-time
- Software troubleshooting
- Mentoring
- Agile
- Employee assistance programme
Senior Software Engineer
Sotheby's —London
- Remote
- Software development
- AI
- Communication skills

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Principal Software Engineer

Simple Machines
London

Quick apply

Job details

Full-time

Qualifications

Kotlin
Cloud infrastructure
Cassandra
Stakeholder collaboration
Kubernetes orchestration
NoSQL
Git
Test-driven development
Cloud engineering experience
Docker
CI/CD pipelines
Scala
Terraform
Back-end development
Redux
Data pipeline
Technical writing
Agile
Front-end development
Web services
Multidisciplinary collaboration
Unit testing
Design documentation
DynamoDB
Business requirements
DevOps implementation
Play Framework
Infrastructure provisioning automation
Terraform provisioning

Full job description

Principal Software Engineer - Simple Machines
Hybrid · Full-time · London, UK

About Simple Machines

Simple Machines is a leading independent boutique technology firm with a global footprint across London, Poland, Sydney and New Zealand. We operate at the intersection of data, AI, machine learning, data engineering, and software engineering—building bespoke platforms and products that turn complex data into real-world outcomes.

We work with enterprises, technology companies, and governments to help them better understand their organisations, customers, and citizens. Our teams design and build large-scale data platforms, intelligent systems, and high-impact software products.

We engineer data to life™.

Requirements

The Role

As a Principal Software Engineer, you’ll play a key role in delivering complex, scalable systems for ambitious clients. This is a hands-on engineering role where you’ll work across the full stack—backend services, APIs, frontend components, data pipelines, and cloud infrastructure.

You’ll collaborate closely with our internal engineering teams and client stakeholders, influencing technical direction while remaining deeply involved in design and delivery. This role suits someone who enjoys solving hard problems, owning outcomes end-to-end, and operating in a consultative engineering environment.

What You’ll Be Doing

Design and build backend services for a highly scalable marketing platform
Own the design of APIs, applications, and supporting infrastructure
Document technical designs and requirements clearly for both internal teams and clients
Deliver solutions end-to-end: build, automate, deploy, operate, and support
Partner with clients and delivery teams to translate business requirements into robust technical solutions
Work within an Agile, iterative delivery model
Collaborate in a hybrid setup with both remote and in-person team members and stakeholders

The Team

You’ll join a high-performing engineering team working on a large-scale machine learning platform for a global telecommunications client.

The team operates with a high degree of autonomy and shared ownership. Engineers work across the full stack, support one another’s growth, and collaborate closely with data scientists and adjacent teams to design cross-system solutions.

Strong engineering culture, real influence, and meaningful problems to solve.

Benefits

What We’re Looking For

Core Experience

Strong foundation in JVM-based development (Kotlin preferred, Java welcome)
Experience designing and implementing data-driven APIs
Background working on large-scale web services
Solid SQL experience, including schema design and performance-aware queries
Deep experience with automated testing (unit, integration; TDD/BDD preferred)

Frontend & Full Stack Exposure

Experience with React, TypeScript, Redux, and Tailwind (or similar modern frameworks)

Cloud & Infrastructure

Experience with AWS, GCP, Azure, or similar
Infrastructure-as-code (Terraform, CloudFormation, etc.)
Containerised deployments using Docker, ECS, Kubernetes, or equivalent

Nice to Have

Exposure to Scala or functional programming concepts
Experience with asynchronous and highly concurrent backend frameworks (e.g. Ktor, http4k, Play, RxJava)
NoSQL experience (DynamoDB, Cassandra, BigTable, Cosmos DB, etc.)
Strong Git workflow experience and the ability to adapt workflows to project needs
A genuine appetite for learning and adopting new technologies quickly

Quick apply

Refine Your Search

react remote jobs in london

Principal Software Engineer

Senior Software Engineer

Product Reliability Engineer

Senior Mobile Engineer

Principal Backend Engineer

Senior Engineer

Mobile Design Engineer

Senior Full Stack Engineer - PHP

Blockchain Engineer (Rust, Cuda, Cryptography, Wasm)

Senior Staff Engineer

Senior Fullstack Engineer

Senior Full Stack Java Developer

Senior Software Engineer - FTC

Senior Software Engineer

Senior Engineer

Senior Kotlin Engineer

Senior Software Engineer (JVM, Kotlin)

Senior Kotlin/JVM Engineer

Senior Backend Engineer (Node.js) - London

Senior Software Engineer

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