Senior Web Application Developer jobs in Leeds

. What is application security design, and why is it important? Answer: Application security design focuses on building security into the architecture before code is written. It helps prevent systemic vulnerabilities that cannot be fixed by tools later, such as broken trust boundaries, weak authentication flows, or insecure data handling. Fixing design flaws early is significantly cheaper and...

About Webigence and Spark Travel Webigence has 25 years of experience crafting UX‐first, often highly complex software. Our engineers pair forward‐thinking agile practices with an obsession for intuitive design, shipping products that feel effortless even when the logic underneath is anything but. Alongside a handful of long‐standing third‐party clients, we're scaling our own SaaS product—Spark...

You will be a hands-on player-coach, owning outreach and qualification while also helping to design the BDR/SDR process, playbooks and best practices.

You will use modern tools (HubSpot, Clay, Instantly, Lemlist, etc.) and AI to build signal-based, multi-channel plays that generate qualified meetings and pipeline across both partners and direct prospects.

BRAND NEW ROLE - Senior Exec Level - Marine Geo Director of Business Development - Geotechnical Engineering & Geoscience Consulting About the Company Our client are a growing offshore geotechnical services and consulting unit, focused on delivering high-quality, technically robust solutions across the offshore, nearshore, and onshore environments. While offshore geotechnical investigations...

We're the #1 symptom tracker on iOS and Android and looking for a senior react native developer to help continue our growth Submit your CV and any additional required information after you have read this description by clicking on the application button. The basics - React Native developer (5y+ experience) - £70,000 base salary - Make a genuine difference to the lives of people with health...

Role Title - .net Developer Leeds, UK Active SC/SC Eligible Resource for the Role Job Description: Project Background. ~ Mastek is responsible for the L3 support, development and enhancements of theclient FAME applications comprise of a collection of bought for/in-house developed systems usung .Net and MS SQL that help to underpin key processes – namely supporting effective Monetary Policy. FAME...

£30k - £40k Full Time Leeds City Centre Flexi time with core hours Full-stack Web Developer Are you passionate about code and making beautiful functioning sites and applications? We're looking for an experienced full-stack developer with an emphasis in back-end / server-side technologies. An enthusiastic problem solver, logical thinker and all-round helpful team player, we need a developer who...

Lead Full Stack Web Developer (Contract) | Leeds City Centre | Hybrid (4 days in office) | £- £ p/d | 3-6 month contract We are working with a large consultancy that are looking for a lead ful stack web developer with a strong expertise in React and modern web development to join a software provider that operates internationally. As the Lead Developer, you will be working across the full stack,...

IT Sales: BDR – Application Development & Consultancy Services Location: Midlands-North Salary: £40k BASIC, £50k Uncapped OTE + Excellent Benefits Ref: 1647873 Role: A leading UK organisation within the world of application development which already boasts a high number of ‘household’ reference sites is looking to further expand its reach across the UK. This organisation has grown...

A leading security firm in the United Kingdom is seeking a skilled Lead Penetration Tester. In this hands-on role, you will lead penetration testing engagements across various applications and mentor junior testers. Strong experience in cloud security, web and mobile testing methodologies, and excellent communication skills are essential. Enjoy a dynamic team environment with competitive...

Who are IDHL? At IDHL, we're more than a digital agency, we're a strategic partner to ambitious brands, helping them accelerate growth in the digital economy. Our expertise is delivered through three core divisions: Performance, Web & eCommerce, and Intelligence – all working closely together to create impact across channels. We're also home to Fostr, a Shopify Plus agency for luxury and...

Position: Front End JavaScript Developer Reports to: Front End Development Team Lead Hours: 40 hours Location: 3 days in North London office (Monday – Wednesday) Salary: £60 - £80,000 + eligibility for performance bonus Start date: ASAP Purpose of the role: As a Front End Developer you will join one of our multinational Scrum teams to create state-of-the-art software solutions. In all...

Salary: £40-£45k (DOE) Reporting to: Technical Director Location: Hybrid or fully remote (UK only) Role type: Full time Who we are We're Field — a design-first Shopify Plus e-commerce agency working with premium, high-growth brands. We're a small, senior, tight-knit team of designers and developers who genuinely enjoy working together, and our retention rate (both team and clients) reflects...

Our team in Leeds currently has an opening for a Senior Application Technologist YOUR ROLE & RESPONSIBILITIES Manages and executes Application and Innovation projects to support the sales growth of Brenntag Nutrition in UK and Ireland. Ensures our Application and Innovation Centre is the local showcase of Brenntag Nutrition capabilities and a knowledge hub for our team, suppliers and...

About us Founded in 2008, CitNOW is an innovative, enterprise-level software product suite that allows automotive dealerships globally to sell more vehicles and parts more profitably. CitNOW's app-based platform provides a secure, brand-compliant solution – for dealers to build trust, transparency and long-lasting relationships. CitNOW Group was formed in 2021 to unite a portfolio of 12 global...

You will shape solution architecture, guide development teams, ensure platform quality, and act as a key technical bridge between onshore stakeholders and offshore delivery teams. This is a great opportunity to influence strategy, innovate at scale, and deliver secure, high‑performing Liferay‑based digital platforms.

You will be responsible for designing, developing and implementing solutions using the MS Integration Services & MS Power Platform suite including but not limited to Logic Apps, Service Bus, Event Grid, APIM, Functions & Function Apps, SQL Server, Azure SQL, Dataverse, D365 modules, 3rd-party APIs, Azure Synapse, Fabric and Key Vault.

You will be working at all stages of the development life cycle and working on business facing applications as well as internal systems with an Agile process. Technical SkillsC#/.

You must speak, write and be able to understand fluent English. - Deep knowledge and regular usage of Firebase suite, especially Firestore. - Strong proficiency in TypeScript and modern JavaScript (ES6+).

You must enjoy constantly learning and researching to improve your level of expertise.

Frontend Software Engineer (React) – Fully Remote (UK) Up to £85,000 + Benefits Fully Remote (UK) High growth company – Great Future prospects Build modern user experiences for data driven technology used at scale A fantastic opportunity to join a growing international technology business building next generation software that automates and streamlines complex data workflows. The businesses...