1 to 25 of 78 Permanent Ruby on Rails Jobs in London

nowhere to hide from good work here. If that excites you more than it scares you, you'll fit right in. Follow us on LinkedIn for new features and the occasional roast Meet the Team Here at Cleo, we have ~200 Engineers organised into Pillars Our stack spans … Ruby on Rails monolith, a single React Native (TypeScript) app frontend, Python for machine learning services, and PostgreSQL, all hosted on AWS and shipped through Kubernetes - backend goes out multiple times a week, app releases to Google and Apple at least weekly. To thrive here ...

this The more we automate, the more human judgement matters. AI gives people back time, and we expect them to spend it on the things no model can replicate: conversations, trust, craft and team judgement.We hire to a high bar. You’ll work with people who push you, raise … want every person at Raylo to do the best work of their lives, and enjoy doing it.Our Core Valuesð¡ Be deeply curious – We thrive on innovation through diverse approaches, views, and people.ð Walk in your customer’s shoes – To build the best products and make the best decisions ...

this? The more we automate, the more human judgement matters. AI gives people back time, and we expect them to spend it on the things no model can replicate: conversations, trust, craft and team judgement. We hire to a high bar. You’ll work with people who push … every person at Raylo to do the best work of their lives, and enjoy doing it. Our Core Values Be deeply curious - We thrive on innovation through diverse approaches, views, and people. Walk in your customer’s shoes - To build the best products and make the best decisions ...

## Software Engineer II - Backend (Ruby/PHP/Scala)Applyremote type: Hybridlocations: London, United Kingdomtime type: Full timeposted on: Posted 6 Days Agojob requisition id: JR102659# **Welcome to the Agentic Commerce Era**## At Commerce, our mission is to empower businesses to innovate, grow, and thrive with … possible in their role. Our purpose is to help businesses confidently solve complex commerce challenges so they can build smarter, adapt faster, and grow on their own terms. If you want to be part of a team of bold builders, sharp thinkers, and technical trailblazers who shape the future ...

Ruby/JavaScript Web Developer – Rails Fintech 50 Quant Capital is urgently looking for a Ruby/JavaScript Web Developer to join our high profile client.Our client is a brand new investment firm driven by technology. They are well known in the media as solving … people in almost 6 months. As their product is web based this position is key to growth and stability.The position is for a Ruby Web Application Developer to build new and maintain existing Rails applications communicating with a Java API. The developer will be working within an Agile ...

looking to hire engineers to join the team. We’re really lucky to have an Engineering team spread across three jurisdictions working on the Hnry product. While that gives us the opportunity to hire great people globally, we’re looking for a Platform Engineer to join our founding London … business to support platform needs and improve developer experience Design, build and maintain improvements to the infrastructure and platform of Hnry, currently hosted on AWS Improve the reliability, availability and performance of our platform Evolve and optimise our CI/CD pipelines to enable fast, safe and consistent deployments ...

historical cash flows, sales data, and treasury information to automatically select optimal forecasting algorithms and improve accuracy by over 30%. You’ll work on sophisticated Ruby on Rails and React software that turns diverse financial data into clear analysis, giving customers sharp insight and forecasting … built to scale across enterprise customers and their data Own the data layer, schema design, query performance, and data integrity - with a strong emphasis on PostgreSQL and SQL more broadly Write and maintain thorough test coverage using RSpec, treating testing as a first-class part of delivery Package ...

Ruby Developer – Full Stack, Rails Javascript, TDD Quant Capital is urgently looking for a Ruby Developer to join our high profile client.Our client is in this year’s fintech50 they are a disruptive force in the global investment and payments space.The office is casual with a compete … tech focus (quiet coding area, loud games room).The position is for a senior Ruby Developer to build a new Rails application communicating with a Java API. The current team has 5 bleeding edge ruby and frontend developers who need some help to keep them from evangelising ...

Ruby Developer – HTML5, Rails Javascript, TDD Quant Capital is urgently looking for a Ruby Developer to join our high profile client.Our client is in this year’s fintech50 and well known to disrupt the global payments and Foreign exchange markets.The position is for a hands mid level … senior Ruby Developer to build new and maintain existing Rails applications communicating with a Java API. The current team has 5 bleeding edge ruby and frontend developers who need some help to keep them from evangelising the world off. The Ruby Developer will be working within ...

this The more we automate, the more human judgement matters. AI gives people back time, and we expect them to spend it on the things no model can replicate: conversations, trust, craft and team judgement.We hire to a high bar. You’ll work with people who push you, raise … want every person at Raylo to do the best work of their lives, and enjoy doing it.Our Core Valuesð¡ Be deeply curious – We thrive on innovation through diverse approaches, views, and people.ð Walk in your customer’s shoes – To build the best products and make the best decisions ...

this? The more we automate, the more human judgement matters. AI gives people back time, and we expect them to spend it on the things no model can replicate: conversations, trust, craft and team judgement. We hire to a high bar. You’ll work with people who push … every person at Raylo to do the best work of their lives, and enjoy doing it. Our Core Values Be deeply curious – We thrive on innovation through diverse approaches, views, and people. Walk in your customer’s shoes – To build the best products and make the best decisions ...

proud B-Corp we focus on using business as a force for good. We do this by balancing out people and planet with profit. For every Mindful Chef recipe box bought we donate the equivalent of a school meal to a child in a less developed country (over … Zero by 2030 but there are so many other initiatives that we would love to tell you about! About the role The Rails Engineer will be responsible for designing, developing, and maintaining high-quality web applications using Ruby on Rails. This role contributes to the full software ...

really lucky to have an Engineering team spread across three jurisdictions working on the Hnry product. While that gives us the opportunity to hire great people globally, we’re always keen to hear from those interested in joining our founding team in London.We’re really proud of the team … Bonus points for the following: Experience building large scale systems Experience being self-employed (freelancing, contracting etc) in any industry/profession Experience with Ruby on Rails How we work We follow agile practices, delivering improvements iteratively in small chunks. We track the impact of our work ...

Junior Ruby Developer – HTML5, Rails Javascript, TDD Quant Capital is urgently looking for a Junior Ruby Developer to join our high profile client.Our client is in this year’s fintech50 and well known to disrupt the global payments and Foreign exchange markets.The position is for a hands … Junior Ruby Developer to build new and maintain existing Rails applications communicating with a Java API. The current team has 3 bleeding edge ruby and frontend developers who need some help to keep them from evangelising the world off. The Ruby Developer will be working within ...

expertise. As an equal opportunities employer, we are committed to encouraging equality, diversity, and social mobility, while creating opportunities for our teams to work on meaningful projects that deliver lasting impact.About You:You are a motivated and adaptable professional with a strong analytical mindset and a passion for using … approach, you’re comfortable engaging with clients, understanding their needs, and translating them into effective outcomes. The Role:We are looking for an experienced Ruby Backend Developer to build and maintain scalable, secure, and high-performance backend systems.RequirementsKey Responsibilities:You will part of a professional software engineering team helping ...

expertise. As an equal opportunities employer, we are committed to encouraging equality, diversity, and social mobility, while creating opportunities for our teams to work on meaningful projects that deliver lasting impact. About You: You are a motivated and adaptable professional with a strong analytical mindset and a passion … approach, you’re comfortable engaging with clients, understanding their needs, and translating them into effective outcomes. The Role: We are looking for an experienced Ruby Backend Developer to build and maintain scalable, secure, and high-performance backend systems. Key Responsibilities: You will part of a professional software engineering team ...

expertise. As an equal opportunities employer, we are committed to encouraging equality, diversity, and social mobility, while creating opportunities for our teams to work on meaningful projects that deliver lasting impact. About You: You are a motivated and adaptable professional with a strong analytical mindset and a passion … consultative approach, youre comfortable engaging with clients, understanding their needs, and translating them into effective outcomes. The Role: We are looking for an experienced Ruby Backend Developer to build and maintain scalable, secure, and high-performance backend systems. Requirements Key Responsibilities: You will part of a professional software engineering ...

Team Lead Ruby/Frontend DeveloperQuant Capital is urgently looking for a Lead Frontend Ruby or JavaScript Developer to join our high profile client.Our client is a brand new investment firm driven by technology. They are well known in the media as solving one of the common problems … people in almost 6 months. As their product is web based this position is key to growth and stability.The position is for a hands on Lead Developer to build new and maintain existing frontend applications and sites communicating with a Java API. The current team has 2 bleeding edge ...

working with the developers to understand their implementation of the requirements. Testing and quality is a team effort, but the QA should focus on keeping these standards high in the team.QA Engineer will be part of a development team working through new projects and maintenance tasks. They will have … specific focus on performance and load testing, being able to offer advice, strategy and direction to the test team on these issues. They will be hands on with these tasks and also overseeing this type of testing across the team.The QA Engineer will also be responsible ...

Title: Fullstack Software Engineer (Rust/Ruby/Python)Location: London, UK (Hybrid)Job Type: Full-timeWhat We're Looking ForExperience: 4+ years of professional software development experience in a fullstack or backend-heavy role.Polyglot Proficiency:Strong commercial experience with Ruby (preferably Ruby on Rails … embraces ambiguity. You care more about solving the problem effectively than being strictly tied to one programming language.Bonus PointsExperience migrating legacy applications (e.g., Ruby/Python to Rust).Contributions to open-source projects in Rust, Ruby, or Python.Familiarity with WebAssembly (Wasm).If you are interested then kindly submit ...

Title: Fullstack Software Engineer (Rust/Ruby/Python) Location: London, UK (Hybrid) Job Type: Full-time What We're Looking For Experience: 4+ years of professional software development experience in a fullstack or backend-heavy role. Polyglot Proficiency: Strong commercial experience with Ruby (preferably Ruby on … Rails) for web application development. Solid proficiency in Python (Django, FastAPI, or similar) with an understanding of data processing. Production experience or a strong foundational knowledge of Rust , particularly in building concurrent, memory-safe, and high-performance applications. Frontend Knowledge: Experience working with modern JavaScript/TypeScript frameworks (e.g. ...

PRINCIPALManchester/London, UKThoughtWorks is synonymous with innovation. We’re a diverse community of bright and passionate individuals striving to have a positive impact on the world. We’re dedicated to the art of software delivery, by keeping it lightweight, agile and open-source. Our clients are organisations with … complex enterprise systems to help them solve their toughest business problems. As a Principal Consultant at ThoughtWorks you have total responsibility for technical delivery on a client engagement so you are likely to have extensive experience.Here’s what you will bring:· Expertise in multiple technologies (including Java, .NET, Ruby ...

role You'll own the backend systems Letly runs on — and the architecture other engineers build on: the software behind every viewing, tenancy, certificate, rent payment and repair. These are systems where correctness, reliability and scale are non-negotiable : real people's money, homes and legal exposure … on the line. This is a senior-to-staff hire. At senior you own systems others build on — you make the architecture calls, set the patterns, and raise the bar around you. At staff you own the technical direction of a domain: you decide what gets built ...

Java Ruby Python DeveloperQuant Capital is urgently looking for a Java/Scala/Ruby Developerto join our high profile client.Our client is an established financial data technology start up. They enable rapid trading transactions to be processed and are innovators in algorithm matching, big data and language … well known to take intractable problems the trading industry faces, employing highly-parallel algorithms, natural-language parsing and a diverse, cutting-edge technology Ruby, Scala, Coffeescript and Java stack. The company structure is very flat and everyone writes code.They are funded by several major banks.I am looking ...

building something that truly matters for millions of people, every day. MEET THE TEAM! Our team builds scalable, resilient products using Python/Django on the backend and React on the frontend, all with one goal in mind: creating a smooth, meaningful experience for our learners and tutors. … proudly tech-agnostic, great engineers come from all kinds of backgrounds. Whether you've worked with Java/Spring, Node.js, Ruby on Rails, Scala/Play, PHP, or Go, you'll feel right at home here. Python experience isn't required. We make decisions based on ...