Senior Web Application Developer jobs in Islington

Global bank based in Canary Wharf. Role - C# Developer - Desktop Applications Duration - 6 months with likely extension Rate - £415 p/d (inside IR35) Location - Hybrid / Canary Wharf Tech Stack C# WPF Winforms SQL OracleTasks Tasks range from understanding business requirements, designing application structures, business data analysis, programming WPF (Windows Presentation Foundation)...

You will be working on new projects on the core web platform with other great developers in the UK.

You will have the opportunity to attend regular Development team events, professional development opportunities and potentially travel overseas to their international offices if this is of interest.

We’re looking for a Senior-level Software Engineer with strong JavaScript/TypeScript skills and experience across modern web stacks. You’ll be instrumental in our transition away from Drupal as we modernise and scale our platform. Tech Stack: At least 6-8 years commercial experience with JavaScript or TypeScript and Node Exposure of Laravel and/or Python (Django or Flask a...

You will take a lead role in building high-quality, accessible, and maintainable front-end solutions across a single-page admin platform and a progressive web application. Working closely with UX, design, and backend developers, you will help shape front-end architecture, improve performance, and mentor other engineers.

You will play a key role in shaping front-end architecture, improving performance and accessibility, and supporting personalisation initiatives. The role also includes mentoring responsibilities and close collaboration with cross-functional teams.

Senior Dynamics 365 CE Developer Remote or Hybrid (London) Nigel Frank International are partnered with an established Dynamics 365 CRM End User who are looking for a Senior Dynamics 365 CE Developer to provide significant contributions to the design and build of enterprise solutions! Responsibilities Deliver high‑quality customisations across model‑driven apps, including forms, views, command...

Senior C# Developer Location: London (Fully Onsite) Employment Type: Permanent Salary: £50,000 - £60,000 (DOE) Visa Sponsorship: Not available We're working with a London-based organisation that is looking to hire an experienced Senior C# Developer to join their engineering team in a fully onsite position. This role is ideal for someone who enjoys hands-on development, working closely with the...

You will be a confident, proactive developer who enjoys solving problems, collaborating effectively, and taking ownership of your work.

The opportunity As a Senior C++ Developer, you won’t be maintaining legacy code or adding features at the edges. You have the option to work fully remote or partically remote with access to the clients offices. You’ll be designing and building core systems that will ultimately run on millions of industrial edge devices, shaping how they authenticate, communicate, and trust one another — from the...

Ref: SAL 23206 The Skills You'll Need: EUC development with SQL, VBA, AWS RDS, Corporate banking Your New Salary: £50-£55k Permanent, Full time Start: ASAP EUC development Senior consultant - What You'll be Doing: * The Business SME will ensure operational continuity and data integrity by bridging business requirements and technical design across Loan IQ's operation and data. * The role...

You will partner closely with developers, product teams, security operations, and offensive security partners to build and scale security capabilities, integrate cutting-edge tooling, and champion a culture of secure coding practices.

Senior Developer - Active SC, Java, Oracle Up to £550 per day (Inside IR35) London / Hybrid 6 months My client is an instantly recognisable consultancy who urgently require a Senior Developer with Active Security Clearance (SC), to join a business-critical programme. Key Requirements: Proven experience working as a Senior Developer within the public sector. Active Security Clearance...

Senior Java Developer | Backend | Microservices | FinTech | London | Hybrid | £120k I'm proud to partner with a global financial organisation, creating an app that allows people in countries like Mexico, Argentina, Colombia, and Brazil manage money in digital dollars and digital euros and it’s designed to protect users from local currency devaluation and make international spending easier. The...

Senior Full Stack Developer Contract Length: Initial 1 month with strong potential for extension Location: Remote Day rate: £600 - £700 per day outside IR35 Data Idols are working with a private equity-backed data analytics and insights business, is seeking a Full Stack Developer to lead a discovery and assessment phase across its existing product platforms. The organisation operates multiple...

Senior C#. NET Developer Location: London (Hybrid) Contract: 6 months IR35: Inside IR35 Our client, a leading global investment bank, is looking for an experienced C#. NET Developer to join their team on a 6-month contract. This role is pivotal in modernising and supporting business-critical applications while contributing to greenfield development initiatives. Key Responsibilities Design,...

Senior VDI (Virtual Desktop Infrastructure) Engineer - Full-time, Permanent Position (37.5 hours) £61,082 - £64,297 Based: Farringdon, London - the post holder will also be required to attend weekly team meetings on a Tuesday at our Twickenham office (TW1 3RP). This is a hybrid working role, requiring regular office attendance. About Us: Metropolitan Thames Valley Housing is one of the UK`s...

You will play a key role in designing, developing, and maintaining applications built using Laravel, PHP, Vue, TypeScript, MySQL, and AWS services. The position combines hands-on development with technical leadership, contributing to architectural decisions, modernisation of legacy systems, and mentoring of other developers.

Android Developer Location: Central London (Onsite) Employment Type: Permanent Salary: £50,000 - £70,000 (DOE) Visa Sponsorship: Not available We're working with a growing organisation based in Central London that's looking to hire a Native Android Developer to join their mobile engineering team. This is a onsite role, ideal for someone who enjoys close collaboration, hands-on development, and...

I am currently working with a London-based financial services client who are actively seeking a senior Python developer to work on the development of a business critical application within the risk space. What you'll need to succeed: Extensive Python application development experience within financial services - must have. Strong API development experience. Strong experience with Django or...

I am currently working with a London-based investment bank who are actively seeking a senior .Net Developer to work on the development of a business-critical pricing platform in a front office team. What you'll need to succeed: Extensive .Net development experience within investment banking with strong knowledge across a range of asset classes. Strong experience developing pricing...