App developer jobs in Belfast

 ...looking for people who embrace AI, are excited about the future, and want to help shape the way we embed AI tooling throughout our developer experience. Primary Job Responsibilities Design & build future-proof solutions to support growing business needs while thoroughly... 

 ...sales process to accelerate buy-in Partner with Forward Deployed Engineers to ensure a seamless handoff from sale to onboarding Develop GTM playbooks, messaging, and outbound strategies to help SIMBA break into new verticals Represent customer needs internally,... 

 ...Senior C# and React Full stack Developer | Front Office Trading House | £90,000 + Strong bonus | 3 days in the Office, Belfast Senior C# and React, full stack Developer is needed for a Belfast-based Hedge Fund who operate across the energy, commodities, equities and other... 

 ...the TCS London Office on (***) ***-**** . Please include the subject line: “Application Support Request”. Role: Senior .NET Developer Job Type: Permanent Location: Belfast, UK / Dublin, Ireland Mode of Working: Hybrid Working Hours: 40 hours per week... 

 ...THE ROLE & RESPONSIBILITIES IN THE BUSINESS: As a Senior Software Engineer (Senior Associate) in Kainos, you’ll be responsible for developing high quality solutions which delight our customers and impact the lives of users worldwide. It’s a fast-paced environment so it is... 

EWOR is launching cutting-edge new initiatives, and we are looking for exceptional operators and builders to join our new department. We are backed and led by serial entrepreneurs, including Paul Müller (founder of Adjust, €1.2B exit) and Petter Made (founder of SumUp...

 ...Tactical Systems and Missile Defence, Optronics, and Radar.Together we offer fantastic opportunities for committed employees to learn and develop their career with us. At Thales UK, we research, develop, and supply technology and services that impact the lives of millions of... 

 ...Pitchside Experience features end-to-end, across our React Native app and web front end.  ~ Show strong design judgement on...  ...people who live and breathe the game — from coaches and players to developers and customer success specialists. At TeamFeePay, we value collaboration... 

 ...our success. You will shine as a mentor, providing technical insight while being empowered to innovate in both solution delivery and developer productivity. Agent First & Innovation Led: We are an Agent First organization. You will be responsible for pioneering agentic... 

 ...latest AI, ML, and large-scale data architectures to transform the customer experience in software. Software Engineers at Magnify will develop microservices, machine learning services, data handling, communication and integration components that enable Magnify’s post-sales... 

 ...SENIOR DEVELOPER Equipple | Belfast, Titanic Quarter — hybrid, minimum two days a week in the office Permanent, full time | £55,000–£65,000 depending on experience Closing date: Sunday 20 September 2026 Own the stack behind a growing EdTech platform — React, Node,... 

 ...Job description Senior Software Developer Contract: Temporary position for 6 months Salary: £36,122 plus a £7,542 annual salary supplement Job Role A major public-sector organisation is seeking an experienced Senior Software Developer to join its Information... 

 ...and provide ICT support, training and documentation to Assembly Members and staff Line manage, coach and quality-assure Software Developers, while assisting with project management, IT security and policy development Technologies: ASP.NET Azure C# Cloud CMS... 

 ...greater value. What You'll Be Doing Design, build, and maintain software solutions using Java, Python, C#/.NET and/or TypeScript Develop cloud-native applications across AWS, Azure, or GCP Contribute to system architecture and make key technical decisions Build... 

 ...Job Title: Senior Software Developer Organisation: Northern Ireland Assembly Contract: Temporary - Full Time Hours - Contract duration to end Feb 2027 Salary: AG7 - £36,122 (+ £7,542 salary supplement p.a.) As a Senior Software Developer within the Information Systems... 

About Instil At Instil, we help technology brands transform, innovate and disrupt their markets with secure, category-defining software. Our services include product development, delivering next-generation digital solutions; cyber security, helping teams protect against...

 ...Proficient in: written and verbal communication, presentation, client service and technical writing skills. Interest in further developing and integrating operations with technology skills. Comfortable researching client inquiries and emerging issues, including regulations... 

 ...back-end services and APIs using C# and .NET . You will work within a cloud-based distributed architecture and have the opportunity to develop your expertise across AWS, Infrastructure as Code and modern software engineering practices. You will work closely with senior... 

 ...production AI. Within Actonomy, Forward Deployed Engineers work directly with customers to deploy Actonomy Core and help organisations develop impactful AI solutions You will work alongside customers to understand business problems, configure and implement Actonomy Core,... 

 ...to ensure alignment and prompt resolution Take a proactive approach to support, digging into issues to identify root causes and developing long-term, proactive solutions to prevent recurrence Document and share knowledge effectively to elevate the team’s technical expertise... 

 ...Java) to join an established engineering team in Belfast . This is an excellent opportunity to become part of a collaborative team developing and enhancing large-scale backend platforms that support mission-critical enterprise applications used by customers worldwide.... 

 ...design secure libraries that enhance the security of Yelp’s applications and services. Develop and deploy services for login and account security specific to Yelp’s website and mobile apps. Support security incident response and contribute to the team’s operational... 

 ...distribute software artifacts at scale. Worldwide, our customers use Cloudsmith as a critical infrastructure control plane for CI/CD, developer workflows, security controls, compliance, and software distribution, supporting 30+ formats and ecosystems across languages,... 

 ...its technology strategy. The AI Centre of Excellence is responsible for identifying and delivering high-value AI opportunities, developing production-grade AI and ML solutions, and supporting the wider organisation in adopting new AI technologies and engineering practices... 

 ...a skilled and motivated Senior Systems Software Engineer to join our team. In this role, you will do Proof-of-Concepts, design, develop, and maintain high-quality software solutions that support our business needs, with a focus on firmware, device drivers, hardware interfaces... 

With a legacy as a pioneer in the ALSP market, Factor leads the next evolution in legal services through AI-integrated contracting. Factor is the market leader in Integrated Law™, combining the expertise of Traditional Law, the efficiency of New Law, and the close business...

 ...to the Team Able to work on-site four days per week at our Belfast office Extensive meaningful hands-on engineering experience developing large scale systems using JavaScript, TypeScript, or similar. Direct hands-on experience with and deep knowledge of React and...