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...

Job Description Senior Product Engineer - Python / Django focused | Full stack JavaScript | US, Global Leader in AI, Series A | Fully Remote (UK) | Salary £80-95k + Bonus + Equity The company: We’re working with a profitable, mission-driven technology company that has been operating quietly at scale for over a decade and is now experiencing explosive growth due to AI demand. The platform...

Job Description 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...

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.

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...

Lead Dynamics 365 Developer - D365 & Power Platform London (2 days onsite) Must be SC Clearable - No sponsorship can be offered Permanent role We are looking for a Lead Power Platform & D365 Developer to lead a team of developers while remaining hands-on in the design and delivery of enterprise Microsoft Business Applications. This role is ideal for someone who enjoys technical leadership,...

Job Description We are looking for an experienced Developer with strong computer vision experience to design, build, and maintain a high-performance Software Development Kit (SDK) used in security-critical mobile applications. This role sits at the intersection of mobile engineering, applied computer vision, and SDK architecture, and will play a key role in delivering reusable, secure, and...

Job Description Senior Full‑Stack C# Developer/Team Lead – London (Hybrid) **Guide salary circa 130-170k + bens/bonus – Commodities trading background is essential** A leading global trading business is expanding its London technology team and is looking for a lead developer to help build and evolve enterprise‑scale trading and risk systems. This role suits someone who enjoys solving complex...

You will position INTEC as the EPC partner of choice, driving strategic partnerships and securing large-scale projects. Key Responsibilities 1. Market Strategy & Growth - Define and execute INTEC’s UK solar EPC business development strategy. - Identify high-value solar PV and BESS opportunities and emerging market trends.

Job Description Lead D365 Business Central Developer Location: London Bridge (1–2 days per week onsite) Salary: £85,000 – £95,000 + benefits We’re looking for a Senior / Lead Microsoft Dynamics 365 Business Central (BC) Developer who wants to stay deeply hands-on while taking clear technical ownership of the ERP platform. This role is ideal for someone who loves building, designing, and...

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 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.

We are seeking a highly experienced Lead Java Developer to join our team on a contract basis (Inside IR35). Required experience: Technical Expertise: Expert-level proficiency in Java and Kotlin development, demonstrated within large-scale, production environments. Team Leadership: Strong team lead background with significant experience coaching, mentoring, and leading senior and junior...

Job Description Lead Backend Developer – Node.js, TypeScript, Kafka - up to £80k Leading E-commerce Brand | Up to £80,000 | Hybrid (2 days/week in London) A leading e-commerce client is looking for a Lead Backend Developer to help shape the technical direction of a highly scalable, event-driven platform. This role combines hands-on development with technical leadership, working in a Node.js,...

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...