ECMAScript Jobs in London

551 to 575 of 1,246 ECMAScript Jobs in London

Reliability & Operations Engineer

london (city of london), south east england, united kingdom
Heart Mind Talent
/weekends during major sports events. What you’ll bring 1–3 years in technical operations, reliability/SRE, support engineering, or data operations. Comfortable with a scripting language (JavaScript or Python); familiarity with a strongly-typed language (Rust/Java/C/C++) is a plus. Hands-on debugging skills: reading logs, calling API endpoints, basic troubleshooting on More ❯
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Senior Partner Engineer

London, England, United Kingdom
Ripple
related field. A minimum of 5 years of experience in technical support Strong knowledge of API integration, RESTful APIs, and API troubleshooting. Proficiency in scripting languages such as Python, JavaScript, or Bash. Excellent problem-solving and analytical skills, with the ability to diagnose and resolve complex technical issues. Exceptional communication skills, both written and verbal, with the ability to explain More ❯
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Senior Partner Engineer

london, south east england, united kingdom
Ripple
related field. A minimum of 5 years of experience in technical support Strong knowledge of API integration, RESTful APIs, and API troubleshooting. Proficiency in scripting languages such as Python, JavaScript, or Bash. Excellent problem-solving and analytical skills, with the ability to diagnose and resolve complex technical issues. Exceptional communication skills, both written and verbal, with the ability to explain More ❯
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Power Pages Developer

London, United Kingdom
Hybrid / WFH Options
Triad Group PLC
applications built using the Power Platform. Lead in the design, configuration, and customisation of Power Pages (portals), Dynamics 365 and SharePoint Online solutions, including plugin development, custom workflow assemblies, JavaScript, and extended Azure/Office 365 integrations. Deliver innovative solutions using Dynamics 365, Power Platform (including Power Pages ) and SharePoint Online across all stages of the software development lifecycle. Create More ❯
Employment Type: Permanent, Work From Home
Salary: £65,000
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Technical Consultant

london, south east england, united kingdom
Hybrid / WFH Options
Staffbase
skills for presenting both business-oriented solutions and advanced technical concepts Good knowledge of web development, preferably knowledge of HTML/CSS and at least one programming language like JavaScript, Java, PHP, or NodeJS Comfort using the command line or application logs to narrow down issues with technical integrations Proficiency in troubleshooting integrations using command line or application logs You More ❯
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ServiceNow Technical Architect - Senior Manager

London, South East, England, United Kingdom
Accenture
HAM/SAM, SPM, HR, CSM, etc.) Experience of operating in a Technical Design Authority mode and demonstrable trusted advisor experience Ability to demonstrate advanced scripting and integration skills – JavaScript, SQL, API Web Services Experience integrating ServiceNow with Cloud Infrastructure (e.g AWS, Azure, GCP) Nice to have: Cloud migration experience GenAI experience ITILv4 or equivalent Certified SC clearance is desirable More ❯
Employment Type: Full-Time
Salary: Competitive salary
Posted:

Software Engineer

London, United Kingdom
Lynx Recruitment Limited
making. WhatWeOffer £70k-£80ksalary+benefits(healthcare,pension,travelsupport). Internationalprojectexposureandtravelopportunities. Keyresponsibilities: Designanddeployscalablesoftwareandhardwaremonitoringsystems. Developmodulesforperformancetracking,faultdetection,revenueanalytics,andpredictivemaintenance. IntegrateSCADA,IoTdevices,andsecuritysystems(CCTV,drones). Collaboratewithengineersandfieldteamstodeliverandcommissionsystems. ApplyAI,IoT,andcloudtechnologiestoenhanceperformanceandinnovation. AboutYou Strongsoftwareengineeringbackground(Python,C++,JavaScript,etc.). Experiencewith industrialautomation,IoT,orenergysystems . Familiaritywith PV,BESS,andSCADA/Modbusprotocols . Cloudplatformexperience( AWS,Azure,orGCP ). Greatproblem-solvingandcommunicationskills. More ❯
Employment Type: Permanent
Salary: £80,000
Posted:

Senior Fullstack Engineer (React/Python)

London Area, United Kingdom
Oliver Bernard
will work with their product team to design, code and test their platform, while also working together with their customers and partners Key requirements: 4+ years’ experience working with JavaScript and React. Experience working with Python. Experience working with Django. AWS. Bonus if you have worked in start-ups before. If you’re a Senior Fullstack Engineer (React, Python) looking More ❯
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Senior Fullstack Engineer (React/Python)

City of London, London, United Kingdom
Oliver Bernard
will work with their product team to design, code and test their platform, while also working together with their customers and partners Key requirements: 4+ years’ experience working with JavaScript and React. Experience working with Python. Experience working with Django. AWS. Bonus if you have worked in start-ups before. If you’re a Senior Fullstack Engineer (React, Python) looking More ❯
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Lead Software Engineer (Contract)

London Area, United Kingdom
Hybrid / WFH Options
FRESH
We’re building out a brand-new division from scratch and need immediate, hands-on Lead Engineers with both strong technical skills and proven people leadership experience. ➡️ Tech stack: JavaScript, TypeScript, Node.js, React or Vue (not all essential) ➡️ Location: Hybrid — 2 days onsite in Central London ➡️ Rate: £600-650pd (Outside IR35) If you’re interested, his the apply button More ❯
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Lead Software Engineer (Contract)

City of London, London, United Kingdom
Hybrid / WFH Options
FRESH
We’re building out a brand-new division from scratch and need immediate, hands-on Lead Engineers with both strong technical skills and proven people leadership experience. ➡️ Tech stack: JavaScript, TypeScript, Node.js, React or Vue (not all essential) ➡️ Location: Hybrid — 2 days onsite in Central London ➡️ Rate: £600-650pd (Outside IR35) If you’re interested, his the apply button More ❯
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Lead Software Engineer (Contract)

london, south east england, united kingdom
Hybrid / WFH Options
FRESH
We’re building out a brand-new division from scratch and need immediate, hands-on Lead Engineers with both strong technical skills and proven people leadership experience. ➡️ Tech stack: JavaScript, TypeScript, Node.js, React or Vue (not all essential) ➡️ Location: Hybrid — 2 days onsite in Central London ➡️ Rate: £600-650pd (Outside IR35) If you’re interested, his the apply button More ❯
Posted:

Lead Software Engineer (Contract)

london (city of london), south east england, united kingdom
Hybrid / WFH Options
FRESH
We’re building out a brand-new division from scratch and need immediate, hands-on Lead Engineers with both strong technical skills and proven people leadership experience. ➡️ Tech stack: JavaScript, TypeScript, Node.js, React or Vue (not all essential) ➡️ Location: Hybrid — 2 days onsite in Central London ➡️ Rate: £600-650pd (Outside IR35) If you’re interested, his the apply button More ❯
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Senior Software Engineer

City of London, London, United Kingdom
Paradigm Tech
customers use of their products, comprised of all senior level developers and above this team tackles the toughest tech challenges in the business. Key Skills Strong understanding of either JavaScript or TypeScript Good experience with C++ and/or Rust Experience with WebAssembly (WASM) Knowledge of Cyber Security when creating web applications Good knowledge of cloud platforms, IaC containers and More ❯
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Senior Software Engineer

London Area, United Kingdom
Paradigm Tech
customers use of their products, comprised of all senior level developers and above this team tackles the toughest tech challenges in the business. Key Skills Strong understanding of either JavaScript or TypeScript Good experience with C++ and/or Rust Experience with WebAssembly (WASM) Knowledge of Cyber Security when creating web applications Good knowledge of cloud platforms, IaC containers and More ❯
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Squad Engineering Manager

London, United Kingdom
Harvey Nash
Our database engine is MongoDB and our observability platform is Datadog. Our application is written in Typescript/NodeJS and our infrastructure is defined in Terraform. * Experience working with JavaScript/TypeScript but also open to other languages like Go or Python. * Required experience working within Financial Services/Fintech space. More ❯
Employment Type: Permanent
Salary: £95000 - £115000/annum
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Squad Engineering Manager

London, South East, England, United Kingdom
Harvey Nash
Our database engine is MongoDB and our observability platform is Datadog. Our application is written in Typescript/NodeJS and our infrastructure is defined in Terraform. * Experience working with JavaScript/TypeScript but also open to other languages like Go or Python. * Required experience working within Financial Services/Fintech space. More ❯
Employment Type: Full-Time
Salary: £95,000 - £115,000 per annum
Posted:

SC + NPPV3 Cleared Java Developer

London, United Kingdom
Hybrid / WFH Options
Damia Group Ltd
Developers to work on a Law Enforcement programme. Key Responsibilities: Work on data mapping and report writing in Java. Essential Skills: Java AWS Spring Boot Kafka Desirable Skills: React JavaScript SC + NPPV3 Cleared Java Developer - 6 months+ - £Inside IR35 - Remote with occasional travel to London Damia Group Limited acts as an employment agency for permanent recruitment and employment business More ❯
Employment Type: Contract
Rate: £550 - £600 per day + Inside IR35
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Front End Engineer

London, South East, England, United Kingdom
Harnham - Data & Analytics Recruitment
FRONT END ENGINEER (AI/ML START UP COMPANY) UP TO 75k LONDON - HYBRID (2 DAYS A WEEK) React, Javascript, Typescript, GraphQL, TDD, CSS, HTML A start-up company is hiring a Front-End Engineer to join their growing team to work on R&D projects in Machine Learning and Data Visualisation. They are looking for a front-end engineer More ❯
Employment Type: Full-Time
Salary: £70,000 - £75,000 per annum, Inc benefits
Posted:

Power Apps Developer - Remote

London, United Kingdom
Hybrid / WFH Options
eTech Partners
with REST APIs, JSON, and custom connectors. Understanding of role-based security, environment management, and DLP policies. Excellent communication and problem-solving skills Desirable Skills Familiarity with Python, JSON, JavaScript, or SharePoint Lists Exposure to Power BI is advantageous. Excellent communication, problem-solving, and interpersonal skills. A collaborative mindset and a willingness to share knowledge. This role offers genuine opportunities More ❯
Employment Type: Permanent
Salary: GBP 55,000 Annual
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Staff Frontend Developer - Outside IR35 Contract

London Area, United Kingdom
Burns Sheehan
on frontend patterns, API design, and how the frontend and backend fit together (they currently use Python, REST, GraphQL, microservices). What They Are Looking For: Proven expertise in JavaScript and React, including modern practices and shadcn experience. A track record of building products from scratch or pivoting products at speed, ideally in startup/scaleup contexts. A mindset for More ❯
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Staff Frontend Developer - Outside IR35 Contract

City of London, London, United Kingdom
Burns Sheehan
on frontend patterns, API design, and how the frontend and backend fit together (they currently use Python, REST, GraphQL, microservices). What They Are Looking For: Proven expertise in JavaScript and React, including modern practices and shadcn experience. A track record of building products from scratch or pivoting products at speed, ideally in startup/scaleup contexts. A mindset for More ❯
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Power Platform Developer - Remote

London, South East, England, United Kingdom
Hybrid / WFH Options
eTech Partners
with REST APIs, JSON, and custom connectors. Understanding of role-based security, environment management, and DLP policies. Excellent communication and problem-solving skills Desirable Skills Familiarity with Python, JSON, JavaScript, or SharePoint Lists Exposure to Power BI is advantageous. Excellent communication, problem-solving, and interpersonal skills. A collaborative mindset and a willingness to share knowledge. This role offers genuine opportunities More ❯
Employment Type: Full-Time
Salary: £50,000 - £55,000 per annum
Posted:

Senior Engineer

London Area, United Kingdom
Albany Growth
highly collaborative, product led team building out greenfield features used by thousands of users every day. We’re looking for: 👉🏼 3+ years’ commercial experience with React Native & React 👉🏼 Strong JavaScript/TypeScript development background 👉🏼 Solid knowledge of state management, REST APIs, HTTP, async programming 👉🏼 Hands-on experience integrating with AWS (Cognito, Amplify, S3) 👉🏼 Experience working with app stores (Apple/ More ❯
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Staff Frontend Developer - Outside IR35 Contract

london, south east england, united kingdom
Burns Sheehan
on frontend patterns, API design, and how the frontend and backend fit together (they currently use Python, REST, GraphQL, microservices). What They Are Looking For: Proven expertise in JavaScript and React, including modern practices and shadcn experience. A track record of building products from scratch or pivoting products at speed, ideally in startup/scaleup contexts. A mindset for More ❯
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