javascript jobs in London

Ref543Vacancy typeITLocationLondonEmployment typeFull-timeClosing date25/09/2026DescriptionApplication Developer (IT) – LondonThe roleTo develop, enhance, and support custom applications and integrations using the Power Platform, working closely with senior developers and the business. Deliver solutions aligned to requirements, focusing on usability,...

Job DescriptionJob PurposeAs a vital member of the Technology Group, you will contribute significantly to the development and delivery of the ICE Digital Trade Platform (IDT) — a cloud-based system designed to digitise, automate, and streamline global trade and post-trade processes. This platform manages the full lifecycle of digital trade documents across...

Project descriptionAs a Senior Integration Engineer, you'll drive the design and delivery of integration components that connect Loan IQ with upstream and downstream systems.You'll lead technical implementation within your pod, mentor mid-level developers, and leverage modern AI-assisted development tools and cloud-native patterns to enhance productivity,...

Automation Test Engineer – Selenium Java PythonUp to 55k + Large Pension, Bonus and Flex Home WorkingQuant Capital is urgently looking for an Automation Test Engineer to join our high profile client.Our client is well known Fintech50 client who produces software disrupting the wealth management market. Currently they stand at 300 in the UK with almost 3000...

Tech: C#, ASP.Net WCF ,MVC, SQL, AWS, Oracle Firm: Global Research Business in the UK Tech Sector Salary: 35,000 + 20% Pension, Flex Working Location: SwindonQuant Capital is urgently looking for a Junior .net Developer to join our high profile client.My client is a UK based Research Business comprising a customised Oracle Siebel CRM, a bespoke .NET external...

Reference: BBBH3876_ Senior Python DeveloperSalary: Up to 90,000 + Bonus + BenefitsLocation: Central LondonWorking Pattern: HybridJob Type: PermanentAn exciting opportunity has arisen for an experienced Senior Python Developer to join a large scale technology environment, developing automation solutions, backend services and tooling supporting complex...

C3 AI (NYSE: AI), is the Enterprise AI application software company. C3 AI delivers a family of fully integrated products including the C3 Agentic AI Platform, an end-to-end platform for developing, deploying, and operating enterprise AI applications, C3 AI applications, a portfolio of industry-specific SaaS enterprise AI applications that enable the digital...

Reference: Job ID: Posted: Closing date: Location: LondonSalary: Negotiable depending on experience (per annum)Job type: PermanentWorking pattern: Full timeIndustry: Healthcare & Medical / InfrastructureCompany: HaysConsultant: Charlie DesboroughHays office: London-City — 5th Floor, 107 Cheapside,Phone: Email: new companyThis is a nationally...

Tech: C# 5, Visual Studiuo, AWS, Angular.JS, Bootstrap, Docker Challenge: Greenfield Financial platform, API development, industry specific challenges Firm: Well-known fintech50 business, City of London, 30 man flat Dev Team Pay: 70k, Bonus- training budget, Pension, Life / Health, Some Flex WorkingC# Senior Developer FintechQuant Capital is urgently looking...

AI Engineer - Cardiff Our client is a leading company based in central Cardiff and they are looking to hire a couple of experienced AI engineers to join their IT team. In this position, you will lead on the design, development, and deployment of advanced AI solutions that enhance operational efficiency and support business growth. You will work closely with...

The ServiceNow Certified Application Developer is responsible for designing, developing, and implementing custom applications and solutions within the ServiceNow platform to meet the business needs of our cybersecurity company. This role requires a blend of programming expertise and a deep understanding of the ServiceNow platform's capabilities to create...

Tech: C# 5, Visual Studiuo, AWS, Angular.JS, Bootstrap, Docker Challenge: Greenfield Financial platform, API development, industry specific challenges Firm: Well-known fintech50 business, City of London, 30 man flat Dev Team Pay: 70k, Bonus- training budget, Pension, Life / Health, Some Flex WorkingC# Lead Developer FintechQuant Capital is urgently looking...

Location: London - hybridWe Are:RTB House is a next-generation performance demand-side platform (DSP) that uses proprietary Deep Learning AI algorithms to help brands grow. The company is the market leader in driving performance using Deep Learning across the entire purchase funnel.Founded in 2012 and now operating in 90+ markets, RTB House has always been...

DescriptionAbout LoopMeLoopMe is an AI company solving one of advertising's hardest problems: making brand advertising actually measurable — and making it perform. Our platform runs patented machine learning models across billions of consumer signals in real time, optimising campaigns toward outcomes like purchase intent, brand lift, and foot traffic...

Are you an experienced Senior Software Engineer or Technical Lead who enjoys remaining hands-on while guiding teams and shaping technical solutions? A leading specialist technical consultancy is looking for a Software Technical Lead to join a live Central Government project. You will work within a collaborative Agile team, building bespoke software that...

BASIC FUNCTIONS:This position performs complex research, design, and software development assignments within a software functional area or product line, and provides direct input to project plans, schedules, and methodology in the development of cross-functional software products. This position performs software design — typically across multiple systems;...

Vacancy detailSenior Full Stack Software Engineer70,000.00 GBPOnsite WORKINGLocation: Central London, Greater London – United Kingdom Type: PermanentSenior Full Stack Software EngineerSalary: Up to 70,000 + benefitsLocation: UK-wide opportunitiesWorking model: HybridWe’re recruiting an experienced Senior Full Stack Software Engineer to join a specialist...

Reference: BBBH3712_ AI Solutions Architect (Innovation & GenAI)Salary: Up to 120,000 + Benefits Location: Hybrid - 3 days per week onsite in London Working Hours: 40 hours per week A globally established organisation is seeking an AI Solutions Architect to lead the design of innovative, cloud-native AI architectures that support rapid experimentation while...

Core Java Developer Trading Technology90000 + bonusQuant Capital is urgently looking for a Core Java Developer to join our high profile client.Our client is well known Low Latency Trading liquidity provider and broker. (NO Finance experience needed)As a senior level developer, you will act within the Integration team to produce solution designs, proof of...

# Senior Test Engineer (Hybrid) – LondonLondon**Location:** London**Start date:** Immediate**The role:**AlphaSights is seeking a highly experienced, self-driven Senior Test Engineer to join our Software Engineering Team. We are a digital business in which continuous uptime, product quality, and user experience are critical to success. The role of the Test...