Job Reference: NJ0234Date Posted: 1 September 2026Recruiter: Nexus JobsLocation: LondonSalary: 60,000 to 75,000Sector: I.T. & CommunicationsJob Type: PermanentWork Hours: Full TimeContact: Jas GujralEmail: #####: 020 7488 6900Apply for this job nowJob DescriptionSenior Fullstack Software DeveloperOur Client is a relatively young company but growing quickly in the world of financial technology solutions.They are now looking to recruit a Senior Fullstack Software Developer with at least 5 plus years expertise.The ideal candidate will have great problem solving and communication skills and be comfortable with fast paced design, development and deployment working in an agile environment.Worked extensively on iOS, Android & web apps and built complex, responsive and sophisticated apps.We are looking for a smart, innovative technical lead to help us coordinate and drive a project of building a next-gen high-performance app.Duties and Responsibilities:  Lead the technical arm of the team in a fast iteration cycles, with tight deadlines using an agile/scrum methodology, while ensuring applications meet quality standardsCoordinate configuring, coding, developing, and documenting software specifications throughout the project life cycle (concept, design, build, deploy, test and release to app store; as well as post launch operations such as support, troubleshoot, improvements etc.)Participate in technical, design, and architecture discussions with external partners from the finance sectorCollaborate with cross-functional teams to determine business requirements, as well as design, develop, and test application code to ensure that business requirements are metDrive a best practices approach to the continuous improvement of products, processes, and tools. Identify and correct bottlenecks and fix bugs for all production issuesLiaise with product development team to plan new features Research and suggest new mobile products, applications and protocolQualifications / Experience:Highly proficient in React, Swift or Objective C, Java for mobile development; Rails, nodejs and Angular for web development5 to 7 years of extensive native mobile app (iOS & Android) and web app development experience Demonstrable portfolio of released web apps, mobile applications on the App store or the Android marketExperience with multi-threaded client software, client-server architecture and scaling systemsExperienced in implementation of Methodologies and the Software Development Life-cycle (Agile)Fully equipped with development Tools (Xcode, Android Studio, Eclipse) and source control tools (Git, Stash)Ability to perform in a team environmentKnowledge and experience with the Financial Information Exchange FIX Protocol would be handy as well as working with trading or currency exchange technology.This position is based in the City London.Salary will be circa 60K - 75K.Please send your CV in Word format along with salary and availability.