Javascript developer / html developer Work, Jobs in London, Eng (with Salaries)

IT Integrations Developer
Transact —London
- Up to £80,000 a year
- Azure
- Computer Science
- SQL
Software Engineer III - React / TypeScript, Gen AI, Frontend
JPMorganChase —London
- Full-time
- JavaScript
- Software development
- Agile
Lead Developer (Mobile)
Post Office Ltd —London
- Full-time
- Java
- SQL
- AWS
- Annual leave
- Employee assistance programme
Senior Fullstack Software Engineer
Outsmart Insight —London
- Weekend availability
- Hybrid work
- JavaScript
- APIs
- Python
Senior Adobe Developer
MAP —London
- English
- Java
- SQL
Quick apply
5d
Technical Lead (AI & MACH)
AKQA —London
- Hybrid work
- Azure
- System design
- AWS
Technical Enablement Engineer (AEP & Data Integrations)
Havas Group —London
- Full-time
- Master's degree
- SQL
- JavaScript
- Employee discount
Senior Engineering Lead, Index Distribution
LSEG (London Stock Exchange Group) —London
- Full-time
- Hybrid work
- Java
- SQL
- AWS
Salesforce Marketing Cloud Solutions Architect
Wunderman Thompson MAP —London
- Sales
- SQL
- JavaScript
Senior Salesforce Developer
Methods Business and Digital Technology —London
- Full-time
- Hybrid work
- Computer Science
- Sales
- Salesforce
- Employee assistance programme
- Employee discount
Quick apply
Senior Analytics Engineer
PlayStation Global —London
- SQL
- AWS
- Bachelor's degree
Quick apply
Senior Solutions Architect, Auth0
Okta —London
- Java
- Presentation skills
- JavaScript
Senior Solution Consultant
dotdigital —London
- Hybrid work
- CRM software
- Sales
- Microsoft Office
- Sick pay
Senior Lead Java Engineer
LSEG (London Stock Exchange Group) —London
- Full-time
- System design
- Java
- SQL
Manager - Salesforce Marketing Cloud Development
MAP —London
- English
- SQL
- JavaScript
Quick apply
5d
Senior Application Engineer
Sportradar —London
- Full-time
- Computer Science
- DevOps
- English
Quick apply
Technology Lead - Salesforce Marketing Cloud
MAP —London
- Sales
- English
- SQL
Quick apply
5d
Senior Accessibility Engineer
Unily —London
- Full-time
- Hybrid work
- JavaScript
- Agile
- AI
Quick apply
6d

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Software Engineer III - React / TypeScript, Gen AI, Frontend
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IT Integrations Developer

Transact -
London

Apply Now

Job details

Up to £80,000 a year

Qualifications

Azure
Computer Science
CSS
Relational databases
Laravel
PaaS
Git
Bash (Unix shell)
SQL
PHP
OOP
JavaScript
Perl
REST
Symfony
APIs
Linux
GraphQL
Python
HTML

Full job description

In this role, you will act as a hands-on developer building and supporting modern applications and integrations across our internal systems and external SaaS platforms.

Working cross-functionally with Development, Engineering & Project teams, your primary focus will be developing application logic and enabling integration between systems using established programming languages (including PHP) and Azure PaaS services.

You will support a range of integration approaches, including direct application integration and API-based solutions where appropriate, ensuring solutions are scalable, secure, and maintainable.

Key Responsibilities:

Develop and maintain intranet applications using relevant web frameworks.
Provide user support and resolve application issues as required.
Design and implement secure API integrations and data flows (e.g. REST, GraphQL).
Contribute to integration design, selecting appropriate approaches (direct integration, API-based, or event-driven) based on business needs.
Troubleshoot, test, and maintain systems to ensure performance, reliability, and security.
Develop cloud-based solutions using Azure PaaS services (e.g. App Services, Azure Functions).
Contribute to CI/CD pipelines and deployment processes, supporting the build, test, and release of applications within Azure environments. This includes aspects of versioning, configuration, and environment management.
Apply “Secure by Design” and secure coding practices across all solutions.
Produce and maintain clear technical documentation for APIs, integrations, and processes.

We’re looking for a candidate with a degree (or equivalent) in Computer Science or a related field, alongside a strong understanding of cloud application design concepts, including Azure PaaS and serverless approaches. You will have strong expertise in PHP (v8+) and object-oriented programming, along with hands-on experience using at least one PHP framework such as Laravel, Symfony or Yii2. Proficiency in JavaScript, HTML and CSS is essential, as is experience working with relational databases and SQL. You should be confident using version control systems (ideally Git), familiar with Linux administration , and comfortable working with scripting languages such as Bash, Python or Perl.

About Us

Transact is a leading UK investment wrap platform for financial advisers and their clients. Our culture is collaborative, inclusive and open-minded. We work hard to continually challenge the way we do things to maintain our market leading status.

As a customer-centric and client focused business, we put our clients, like Mrs Miggins, at the heart of everything we do.

Our platform enables clients and their advisers to manage their financial portfolio in one single online place, and is supported by unrivalled personal service. Our goal is to make all aspects of portfolio management as easy and efficient as possible for everyone involved, through the features we develop, our integrations with other systems, and the support we provide.

Our purpose: We enable the Miggins family and their adviser to hold their investments on a single platform across wrappers. We provide custody, tax wrapping, trading and reporting.

Our strategy: We make financial planning easier for advisers by delivering great service. Our platform helps advisers grow revenues and reduce risk and cost in their business. We will always have control of our technology, wrappers and service.

Our values: We do the right thing for customers, advisers, staff, shareholders, suppliers and the wider community.

Transact's parent company, IntegraFin Holdings plc, is listed on the London Stock Exchange and is a constituent of the FTSE 250 index. Established in 2000, today we have over £77.2 billion of funds under direction on behalf of over 249,000 investor clients (as at December 2025).

Equal Opportunities

We provide a diverse and inclusive workplace and ensure that all of our staff respect and understand individual differences. We are an equal opportunities employer and positively encourage applications from suitably qualified and eligible candidates regardless of age, disability, gender reassignment, marital or civil partner status, pregnancy or maternity, race, religion or belief, sex or sexual orientation.

Apply Now

Refine Your Search

javascript developer / html developer jobs in london, eng

IT Integrations Developer

Software Engineer III - React / TypeScript, Gen AI, Frontend

Lead Developer (Mobile)

Senior Fullstack Software Engineer

Senior Adobe Developer

Technical Lead (AI & MACH)

Technical Enablement Engineer (AEP & Data Integrations)

Senior Engineering Lead, Index Distribution

Salesforce Marketing Cloud Solutions Architect

Senior Salesforce Developer

Senior Analytics Engineer

Senior Solutions Architect, Auth0

Senior Solution Consultant

Senior Lead Java Engineer

Manager - Salesforce Marketing Cloud Development

Senior Application Engineer

Technology Lead - Salesforce Marketing Cloud

Senior Accessibility Engineer

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