799 Senior Developer jobs in London

Job Tittle: Full Stack Developer - UI / React (Scala)
Contract Length: 12 Months
Location: Bromley (3 Days a Week Onsite)
Working Pattern: Full Time (40 Hours per Week)
Rate: Highly competitive rate available for suitable candidates

Are you a passionate Full Stack Developer looking for an exciting opportunity to make a real impact? Join our client's dynamic team and be a part of a project that combines innovative technology with user-centric design! We are on the lookout for a talented individual who thrives in an Agile environment and has a flair for developing web-based UI solutions using React JS and Scala.

Project Overview:
You will be working on a cutting-edge React web application that functions as both a platform and an application. Your contributions will help enhance core library consistency across products and tackle a significant backlog of development on the UI/React side. Get ready to dive into the fascinating world of self-generative AI, complex data management, and data visualisation supporting global markets!

What You'll Do:

• Collaborate within a feature team to provide Operations Users with effective Workflow and Work Management for Trade Lifecycles-from Booking through Settlement to Position Keeping.
• Lead the charge on UI/UX improvements to modernise and enhance product usability.
• Develop high-quality web-based UI solutions using React JS and java Script.
• Need to know back-end Scala.
• UI design skills, able to prove that they have been involved in the UI design
• Experienced in TDD, Cyprus automated testing
• Utilise your full stack capabilities and knowledge of JVM languages, particularly Scala.
• Write robust Unit Tests and Acceptance/behaviour Tests to ensure code quality.
• Tackle complex data structures and algorithms with strong problem-solving skills.
• Engage actively in Agile practises, including pair programming and daily stand-ups.
• Share your expertise and collaborate with team members while maintaining a continuous integration workflow.
• Work comfortably in a Linux/Unix environment.

What You Bring:

• Professional experience in developing web-based UI solutions with React JS.
• Proficiency in JVM languages, especially Scala or other functional programming languages.
• A solid foundation in writing Unit Tests and Acceptance/behaviour Tests.
• Strong analytical skills and a knack for problem-solving.
• A proven track record in Agile methodologies and teamwork.
• Familiarity with the relevant problem domain from previous roles.
• An enthusiasm for technology and a desire to innovate!

Why Join Us?

• Be part of a forward-thinking organisation that values creativity and collaboration.
• Work in a vibrant environment that encourages continuous learning and growth.
• Enjoy a highly competitive rate for your expertise and contributions.
• Experience the thrill of working on a transformative project with global implications.

If you're ready to take on this challenge and advance your career as a Full Stack Developer, we'd love to hear from you! Apply now and let's embark on this exciting journey together!

Application Instructions:
Please submit your CV along with a cover letter detailing your relevant experience and why you're the perfect fit for this role. We can't wait to see what you bring to the table!

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

Lead Full-stack Developer

• Location: Holborn, Central London (Hybrid)
• Job Type: Full-time
• Direct Reports: x5 Senior Developers
• Reporting to: Head of AI & Technology

An exciting new permanent opportunity has become available for a Lead Full-stack Developer, to join a juggernaut organisation in the recruitment industry. A highly dynamic, ambitious and fast-growing team dedicated to transforming the recruitment landscape through AI-driven, human-centered technology. This is a pivotal role where you will lead a team of 5 Senior Developers, focusing on hands-on coding and providing technical leadership underneath the guidance of the Head of AI & Technology.

Day-to-day of the role:

• Lead and mentor a team of 5 Senior Developers, maintaining a hands-on approach with coding and problem-solving.
• Oversee the end-to-end delivery of features, ensuring the software is scalable, speedy, and of high quality.
• Architect, develop, and maintain core components of our SaaS platform:
  • Backend: Python, PostgreSQL
  • Frontend: TypeScript, NextJS/NodeJS
• Integrate AI tools, APIs, and data pipelines to enhance platform intelligence.
• Promote engineering best practices such as testing, CI/CD, and secure coding standards.
• Conduct code reviews and provide technical mentorship.
• Collaborate with the Head of AI and Technology to align development priorities with business objectives.
• Foster a culture of collaboration, continuous learning, and high performance.
• Troubleshoot and resolve complex issues, ensuring platform reliability and uptime.

Required Skills & Qualifications:

• 10+ years of commercial software development experience, with at least 5 years in a lead developer role.
• Proven track record in leading small, high-performing engineering teams in fast-paced environments.
• Deep expertise in full-stack development, including:
  • TypeScript / JavaScript (NextJS, NodeJS, Tailwind)
  • Python (Django, Flask, or FastAPI)
  • PostgreSQL
• Experience with building and scaling SaaS platforms in production.
• Strong background in software architecture, microservices, and API design.
• Hands-on experience with cloud platforms (AWS, Azure, or GCP).
• Excellent communication skills, capable of motivating and aligning technical teams.
• Desirable: Experience with AI tools, APIs, ML pipelines, containerisation (Docker/Kubernetes), event-driven architecture (Kafka/RabbitMQ).

Benefits:

• Hybrid working model (minimum 3 days a week in office)
• 25 days annual leave plus bank holidays
• Flexible holiday scheme
• Contributory pension scheme
• Enhanced family leave benefits
• Insurance benefits including life assurance
• Regular events and discounts at gyms and popular retailers
• Wellbeing and mental health support
• Vibrant office location in Holborn with numerous amenities nearby

To apply for the Lead Full-stack Developer position, please submit your CV and cover letter detailing your relevant experience and why you are interested in this role.

• Design, develop, and maintain full-stack web applications.
• Write clean, efficient, and well-documented code across the entire technology stack.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Implement and manage database solutions (SQL and NoSQL).
• Develop and consume RESTful APIs.
• Integrate front-end components with back-end services.
• Ensure the technical feasibility of UI/UX designs.
• Optimize applications for maximum speed and scalability.
• Conduct code reviews and mentor junior developers.
• Troubleshoot, debug, and upgrade existing systems.
• Implement and maintain CI/CD pipelines and DevOps practices.

• Proven experience as a Full Stack Developer, with a strong portfolio of work.
• Proficiency in front-end technologies (HTML, CSS, JavaScript, and modern frameworks like React, Angular, or Vue.js).
• Strong back-end development experience with languages such as Node.js, Python, Java, or Ruby.
• Experience with database technologies (e.g., PostgreSQL, MySQL, MongoDB).
• Familiarity with cloud platforms (AWS, Azure, GCP) and containerization (Docker, Kubernetes).
• Understanding of API design principles and microservices architecture.
• Experience with version control systems (e.g., Git).
• Excellent problem-solving and analytical skills.
• Strong communication and teamwork abilities.
• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

Lead Full-stack Developer

• Location: Holborn, Central London (Hybrid)
• Job Type: Full-time
• Direct Reports: x5 Senior Developers
• Reporting to: Head of AI & Technology

An exciting new permanent opportunity has become available for a Lead Full-stack Developer, to join a juggernaut organisation in the recruitment industry. A highly dynamic, ambitious and fast-growing team dedicated to transforming the recr.

WHJS1_UKTJ

Intermediate/Senior Full-Stack Software Developer (or half Stack)
Type: Full-Time, Permanent Hybrid
Salary: DOE + Benefits

Join a globally recognized award winning leader in automation and machine learning solutions, and contribute to the evolution of their acclaimed platform. This role is Hybrid and candidates need to be able to commute to Kent for office based duties and have the right to work in .

WHJS1_UKTJ

Senior Full Stack Developer

Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS

Why? scaling FinTech, revolutionising the industry

Location : Hybrid - 1-2 days in the office (Central London)

Our Client

A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and user-friendly financial products to consumers. The organis.

WHJS1_UKTJ

• Design, develop, test, deploy, maintain, and improve software across the full stack.
• Manage individual projects and collaborate with team members on complex tasks.
• Write high-quality, maintainable, and well-documented code for both frontend and backend systems.
• Develop and design RESTful APIs and services.
• Design and manage database schemas and query optimisation.
• Implement and maintain CI/CD pipelines for automated deployment.
• Collaborate with UI/UX designers to translate requirements into functional features.
• Ensure the performance, quality, and responsiveness of applications.
• Conduct code reviews and mentor junior engineers.
• Contribute to architectural discussions and technical roadmap planning.
• Troubleshoot and resolve complex technical issues.
• Stay up-to-date with emerging technologies and industry best practices.