lead javascript developer jobs in City of London

Job Description React Native Developer - Hybrid - Outside IR35 | React Native | FinTech | JavaScript | TypeScript We’re working with a fast-growing FinTech in London that’s building next-generation mobile products used by thousands of customers daily. They’re looking for an experienced React Native Developer to join the team on a contract basis, contributing to high-impact features across their...

Company: 8 Signals Limited About us 8 Signals is a UK-based software development company specialising in building tailored digital solutions that help businesses solve complex problems and streamline their operations. We combine strong technical expertise with a deep understanding of our clients’ requirements to deliver high-quality software, whether that’s new applications, enhancements to...

Benefits ~9% pension contribution ~ Stock Options ~ Health Insurance etc This is your chance to perform the job you love and make a difference in society whilst doing it! Help this one-of-a-kind Social Good platform change the world by developing this one-of-a-kind eCommerce solution. The Company ~$120m VC-backed Scale-Up ~ One of the fastest-growing companies in the world ~ 'Fast Company' Most...

Senior JavaScript / TypeScript Engineer | Data Visualisation | 2D Graphics London | to £200,000 depending on exp. I'm hiring a Senior Engineer to work on a widely-used, open-source charting library relied on by thousands of engineers building data-intensive products. This is not a typical frontend role. You’ll be working at the heart of a graphics and visualisation engine — solving problems...

Job Role: Software Engineer, Frontend Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern JavaScript stack, your primary focus will be on coding, testing, and enhancing the...

We’re partnering exclusively with one of London’s most prestigious trading powerhouses to hire a standout Front-End Software Engineer — someone who lives and breathes elegant UI engineering and wants to build products that matter at millisecond scale. This is your chance to work at the core of high-performance trading tech, crafting ultra-fast, hyper-polished interfaces used by some of the...

You will play a critical role in building and evolving systems within a regulated payments / financial services environment, balancing engineering excellence and platform resilience. Engineering Leadership & StrategyOwn the software engineering strategy, aligned with business, product and regulatory objectives.

Lead Developer London - Hybrid 1/2 days in office £85,000 - £100,000 About Simmer We’re Simmer Eats, one of Europe’s fastest-growing food brands. We’ve grown 10x in the last year, and we’re building the next phase of scale on a modern commerce and technology stack. Our mission is simple: make healthy eating effortless. High-protein, great-tasting meals delivered straight to customers’ doors,...

Business Development Lead - DeFi Crypto Payments Remote £50-£70k Plexus has a unique opportunity with a team building next-generation blockchain protocols at the intersection of decentralized finance and ecosystem growth. They are focused on creating foundational infrastructure and cultivating a high-impact DeFi ecosystem from the ground up. They are looking for a Business Development Lead...

You will be joining a company that aims to set a progressive industry agenda and is becoming an increasingly provocative, disruptive, and modernising voice.

You will be representing a service that includes pitch consultancy and a powerful marketing intelligence platform.

You will manage one direct report, with the opportunity to shape and build a small team as the function grows.

You will be joining a company that is going through an exciting phase as they embark on a digital transformation. Key Skills/Experience : - Exchange (Online and On-Prem) - strong under...

You will take ownership for growing our customers and revenue in the region. You’ll land high-impact deals with banks, fintechs, platforms and enterprises—and lead a team of BD professionals doing the same. You’ve got the commercial sharpness to close complex deals and the leadership mindset to scale a team.

Job Description Lead Software Engineer (Java) – London / Hybrid Are you a Lead Backend Engineer with a strong background in Java and modern backend architecture? In this senior technical leadership role, you will set the technical vision, influence system design, and guide teams in delivering secure, scalable, and high-performing services. While remaining hands-on for key projects, you will...

Job Title: Business Development Operations Lead Please double check you have the right level of experience and qualifications by reading the full overview of this opportunity below.Function: Requirements & CapabilityLocation: Harlow or London (Hybrid working with 2-4 days a week on site, spilt between these two sites)Travel: As requiredClearance Required: SCRaytheon UKAt Raytheon UK, we take...

You will work closely with traders, quants, financial engineers, and technology partners, contributing directly to the performance, resilience, and evolution of a mission-critical e-trading platform. What You’ll Be Doing - Design, build, and enhance a robust, ultra-low latency Fixed Income electronic trading platform

You will oversee the procurement, management, and review of key HR contracts—such as managed service providers and HR systems—ensuring they consistently deliver exceptional value and performance.

You will be responsible for:

You should possess excellent financial planning and business modelling experience, along with a good understanding of sales-driven business models.

You will establish the sales process, digital presence and lead generation capability required to create consistent pipeline, convert enquiries into profitable work, and support scalable growth. The role requires someone who has previously built business development capability from first principles and can take full ownership of pipeline creation, conversion and performance tracking.

Benefits ~9% pension contribution ~ Stock Options ~ Health Insurance ~ L&D Budgets This is your chance to perform the job you love and make a difference in society whilst doing it! Help this one-of-a-kind Social Good platform change the world by developing this hyper-growth eCommerce solution. The Company ~$120m VC-backed Scale-Up ~ One of the fastest-growing companies in the world ~ 'Fast...

Lead Developer London - Hybrid 1/2 days in office £We’re Simmer Eats, one of Europe’s fastest-growing food brands. We’ve grown 10x in the last year, and we’re building the next phase of scale on a modern commerce and technology stack. High-protein, great-tasting meals delivered straight to customers’ doors, powered by technology that actually scales. If you’re a commercially minded, hands-on Full...

Data Visualisation Engineer | JavaScript | TypeScript | 2D Graphics | London London | to £160,000 | Hybrid Work Great charts don’t just show data. They tell a story. Looking to hire a Data Visualisation Engineer to help shape how developers around the world tell visual stories with data. You’ll join a highly respected, product-led engineering team building a modern, open-source JavaScript...