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Top Backend Jobs in Belfast
AdTech • Big Data • Digital Media • Software
The Senior Engineer (Backend) at Magnite will design, develop, and maintain APIs and infrastructure supporting ad services. Responsibilities include managing project priorities, collaborating with teams, writing production-ready code, handling bug reports, and performing design and code reviews. A strong focus on object-oriented programming and experience with various programming languages is required.
Top Skills:
C#JavaJavaScriptPython
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
As a Senior Backend Software Engineer, you will design, develop, and maintain high-scale backend services for CrowdStrike's Kestrel platform. Your role includes mentoring other engineers, debugging system issues, and collaborating with product teams to implement new features, while ensuring high-quality software delivery and continuous improvement of service architecture.
Top Skills:
GoPython
Artificial Intelligence • Enterprise Web • Software
As a Senior Software Engineer on the Content Lake DX team, you will design and develop scalable distributed systems, innovate on solutions for complex problems, mentor teammates, and lead technical reviews. You'll focus on improving query performance and contributing to an open-source query language.
Top Skills:
GoNode.jsTypescript
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
The Sr. Software Engineer will build and evolve cloud-based systems for real-time detection against targeted attacks, focusing on performance, scalability, and quality. Responsibilities include collaborative system design, code review, solving technical challenges in Go and Python, and mentoring team members.
Top Skills:
GoPython
Artificial Intelligence • Machine Learning • Natural Language Processing • Conversational AI
As a Senior Backend Engineer at Smartcat, you will design and implement scalable backend services and APIs, optimize application performance, collaborate with teams, troubleshoot production issues, and participate in code reviews.
Top Skills:
.Net CoreC#Python
Artificial Intelligence • Machine Learning • Natural Language Processing • Conversational AI
As a Senior Software Engineer on the Product Platform Team, you will enhance the core architecture of Smartcat's API Gateway, focusing on scalability, performance, and ease of use. You are expected to propose architectural changes, strengthen the API experience, and work collaboratively on sustaining key platform features.
Top Skills:
.NetC#
Software
The Senior Software Engineer (Backend) will collaborate with product teams to develop scalable services and APIs, implement iterative improvements, troubleshoot complex problems, and improve application performance. The role involves participating in code reviews, on-call rotations, and knowledge sharing.
Top Skills:
JavaScriptPythonTypescript
Fintech • Information Technology • Payments
As a Software Engineer at Visa, you'll design and enhance transactional processing systems, focusing on backend development, RESTful APIs, and container-based services in an agile environment. Responsibilities include coding, testing, and collaboration on project requirements, ensuring high code quality and adherence to security standards.
Top Skills:
JavaScala
Fintech • Information Technology • Payments
As a Staff Software Engineer, you will lead the design and development of integrations with payment networks, create REST APIs, and maintain secure and scalable systems. You will provide technical leadership, oversee multiple projects, enforce best practices, and ensure on-time delivery of high-quality code while driving team growth and success.
Top Skills:
Core JavaJavaJavaScript
Software
As a Senior Backend Software Engineer at Amplemarket, you will design reliable backend systems and APIs for a growing sales platform while collaborating with cross-functional teams. Responsibilities include building new features, providing leadership, and ensuring system stability and performance.
Top Skills:
ReactRuby
Software
The Senior Backend Engineer will design, develop, and maintain the CMS platform, enhancing performance and reliability while collaborating with cross-functional teams. Responsibilities include building scalable backend systems, optimizing APIs with PostgreSQL, conducting automated testing, mentoring junior engineers, and actively participating in code reviews.
Top Skills:
Ruby
Information Technology
The Sr Backend Engineer will design, develop, and maintain backend services using Ruby on Rails, implement cloud services on AWS, optimize PostgreSQL database performance, and collaborate with front-end developers. Responsibilities include identifying bottlenecks, participating in code reviews, and documenting features.
Top Skills:
Ruby
Information Technology • Web3
As a Senior Backend Engineer at Tenderly, you will lead the enhancement of orchestration systems, optimize EVM performance, develop custom storage engines, and virtualize blockchain networks. You will drive independent projects, architect scalable solutions, and collaborate with cross-functional teams to tackle complex challenges in blockchain technology.
Top Skills:
Go
Fintech • Financial Services
The QA Engineer will design, develop, and execute test cases for backend applications in a financial setting, focusing on both functional and non-functional testing. Responsibilities include automation testing, collaborating with stakeholders, and enhancing QA processes while working in a SCRUM or Agile environment.
Top Skills:
JavaPythonRust
Blockchain • Consulting
The QA Engineer will specialize in backend testing within the MultiversX environment. Responsibilities include familiarizing with the ecosystem, building tests for services, triaging failures, collaborating with development teams, participating in release processes, and advocating for quality and stability in product development.
Top Skills:
GoJavaScriptPythonTypescript
Blockchain • Consulting
As a Backend Developer at MultiversX, you will work with NestJS to develop microservices for blockchain applications, create REST API and GraphQL endpoints, optimize performance for large-scale usage, and participate in technological decision-making. You will also troubleshoot complex bugs and follow coding best practices.
Top Skills:
JavaScriptNode.jsTypescript
AdTech • eCommerce
The Senior Back-end/Full Stack Developer will design, develop, and maintain web applications using PHP and Vue.js, ensuring optimal user experience. They will work collaboratively to implement new features, optimize databases, and troubleshoot technical issues by utilizing best practices in software design and development.
Top Skills:
JavaScriptPHPSQLVue
Financial Services
As a Back-End Engineer at Symphony, you'll design and maintain Java backends, implement compliance features, participate in backend reengineering projects, and support infrastructure needs in a fast-paced, collaborative environment. You'll engage in the entire backend lifecycle, focusing on maintainability and scaling while utilizing a strong DevOps mindset and multi-cloud environments.
Top Skills:
Java
Software
As a Senior Backend Engineer at Lokalise, you will design, develop, and deploy complex software systems while defining technical standards and best practices. You will focus on architecting scalable software solutions, mentor junior engineers, and contribute to discussions that impact the entire engineering organization.
Top Skills:
JavaNode.jsPHP
Software
The Staff Software Engineer for the Global Search product group at HubSpot will develop and ship impactful production code, manage feature innovation, collaborate across departments, analyze user behavior, and contribute to team-building efforts. This role focuses on addressing complex engineering challenges in a high-traffic environment and leveraging AI to enhance the user experience.
Top Skills:
Java
Software • Cybersecurity
As a Backend Engineer, you will develop and enhance the User Control Panel, ensuring quality code, mentoring teammates, and contributing to team goals in a collaborative environment. You'll also focus on R&D operations and improve engineering standards.
Top Skills:
PHP
Information Technology • Consulting
As a Blockchain Application Engineer, you will develop and maintain systems for a decentralized exchange, focusing on the trade engine and multi-chain data capture. Strong programming skills in Go are essential, along with experience in database operations and an interest in blockchain technology.
Top Skills:
GoJava
Software
As a Senior Software Engineer II, Backend, you will develop AI-powered tools for HubSpot's internal sales teams, enhancing user satisfaction and driving company growth. Responsibilities include writing impactful production code, collaborating with diverse cross-functional teams, and designing new features that improve revenue and user experience.
Top Skills:
Java
Artificial Intelligence • Machine Learning • Natural Language Processing • Conversational AI
As a Senior Backend Developer at Smartcat, you will rebuild the core architecture of the product's API Gateway and enhance platform scalability, usability, and performance. You will contribute to architectural decisions, collaborate with other teams, and influence the integration capabilities of the platform for external developers.
Top Skills:
.NetC#
Software
The Technical Lead II for the Forms Backend team at HubSpot will lead a small team, address technical challenges, collaborate with various stakeholders, ensure product reliability, and actively participate in shaping product direction, while fostering an inclusive team culture.
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