Top Software Engineer Jobs in Belfast

Develop and maintain the backend ecosystem for the Alta Video Management System, focusing on cloud-based distributed systems and coding quality.

The Software Engineer will develop the backend for a cloud-based video management system, focusing on system design, feature development, and enhancing existing capabilities.

As a Software Engineer at Texas Sports Academy, you will design and ship AI-driven software features across various systems while collaborating directly with founders.

The Software Engineer will shape AI governance in developer tooling, build product features, collaborate with teams, support users, and innovate rapidly.

As a Software Engineer - L3 Support, you will resolve complex Ubuntu-related issues, collaborate with teams, and participate in upstream communities to drive bug fixes and improvements.

As a Software Engineer, you will resolve complex customer issues related to Ubuntu and open source software, participate in upstream communities, and develop and review code across multiple layers of the software stack.

Lead the design and implementation of core authentication infrastructure at Phantom, focusing on secure authentication systems, secrets management, and API integrations.

As a Software Engineer, you'll develop trading APIs and systems, enhance user experiences, and lead initiatives for blockchain support and new products.

Lead Systems Engineer responsible for designing, implementing, and maintaining PLC/SCADA automation systems, industrial networks, and OT cybersecurity. Provides technical leadership, mentors teams, oversees system architecture, commissioning, risk assessments, and vendor/client coordination to deliver secure, standards-compliant projects on time and within budget.

As a Senior Software Engineer at KoBold, you'll develop innovative data systems for mineral exploration, collaborating closely with geologists and data scientists to improve exploration success rates. You'll own projects end-to-end, engage with users, and create scalable, production-quality solutions for complex geological challenges.

Design, build, and maintain scalable backend systems and APIs using Go/Python. Integrate enterprise services, data pipelines, event-driven tech (Temporal, Kafka), and LLMs (OpenAI, Gemini, Claude). Ensure security, high availability, multi-tenant SaaS deployments, and improve engineering practices across the stack.

Work on YDB distributed storage and database systems to maximize performance on modern and legacy hardware (NVMe, HDD, DPUs). Reengineer components for low-latency, high-throughput workloads, profile and debug production systems, and design resilient distributed storage primitives. Collaborate on incident resolution and production deployments to support Nebius cloud services.

Build and maintain a distributed, fault-tolerant, high-performance block and filesystem storage system. Work on virtualization (virtio-blk, virtio-fs, QEMU, vhost-user), high-throughput VM-to-storage networking (TCP, RoCEv2/RDMA), and core storage features like replication, consensus, self-healing, and data migration. Debug and optimize performance-critical I/O paths while writing reliable, maintainable code in a collaborative team environment.

Design, develop, and maintain secure, scalable backend services and mobile SDKs for payment device integrations. Lead architecture, improve CI/CD and testing, mentor engineers, ensure security and compliance (PCI/OWASP), investigate performance issues, participate in on-call rotation after onboarding, and collaborate cross-functionally to deliver reliable payment solutions.

Lead analysis and resolution of system performance issues across Akamai's distributed Linux platform. Design and implement scalable software and tools for performance detection, mentor engineers, and collaborate across teams to deploy efficient solutions.

Lead design and development of Windows desktop applications. Ensure performance, maintainability, and accessibility, while driving feature lifecycle and collaborating cross-functionally.

Join a collaborative development team to design, implement, and maintain SaaS solutions, writing clean code and participating in Agile methodologies.

A mid-level C# .Net Back End Software Engineer responsible for the software development lifecycle, collaborating with teams, and maintaining software applications with a focus on Azure cloud services.

Design and build scalable applications using JavaScript or Python, implement data storage solutions, optimise performance, ensure testing and CI/CD practices, collaborate with clients and technical leaders, and maintain high code quality through reviews and agile delivery.

Design, develop, and maintain components of the LNIP intelligence core platform, including a semantic search API and internal data curation tool. Implement secure coding standards, unit testing, code reviews, and cloud deployments. Use agentic development tools responsibly and work with complex data models, vector embeddings, SQL and PySpark to support intelligent software systems.

Develop microservices and cloud services for Magnify's platform, collaborate with data science, and lead complex software projects in a startup environment.

Join the Guardian test team to design, execute and maintain manual and automated test suites for a critical call-taking and dispatch platform. Participate in Agile sprints, create detailed bug reports, support release and on-site customer testing, and collaborate with developers to ensure product quality. Drive automation efforts and help improve test strategies and processes.

The Senior Software Engineer will develop features for Phantom's web platforms, lead new product initiatives, interface with users, and contribute to team culture.

The Sr. Software Engineer (FE) will lead the development of scalable frontend applications using React. Responsibilities include systems design, testing strategy, performance optimization, AI integration, and mentoring.

The Software Engineer will develop high-quality responsive UIs for web/mobile, conduct user research, optimize applications, troubleshoot issues, and conduct code reviews.