Top Software Engineer Jobs in Belfast

As a Software Engineer II, you will design, build, and optimize billing services on the Apex Ascend platform using languages like Java and Python. Responsibilities include developing microservices, testing, debugging, and collaborating with teams to enhance billing applications.

Apex Fintech Solutions seeks a Software Engineer II for designing, developing, and maintaining a real-time automated portfolio rebalancing solution focusing on trading system integration, ETL pipeline development, microservices architecture, and API development.

The Software Engineer II will design and optimize financial technology solutions, collaborate with cross-functional teams, and maintain robust code while ensuring compliance with industry standards.

Develop and maintain high-volume exchange connectivity software, work within an agile team, write efficient code, and mentor team members.

Seeking a Senior Software Engineer for designing, developing, and maintaining software solutions; focusing on billing platforms and collaboration across teams.

The Senior Software Engineer will design and build backend services for health data, improve reliability, and deliver robust solutions to enhance patient care.

Train LLMs to produce production-grade code by comparing and ranking snippets, repairing and refactoring AI-generated code, and injecting reviewer feedback into the RLHF pipeline. Provide clear written justifications and spot logic, performance, and security issues while working remotely as a 1099 contractor.

Evaluate and improve AI-generated code: compare and rank snippets, repair and refactor for correctness, efficiency, and style, and inject detailed feedback and test results into the RLHF training pipeline as an asynchronous remote contributor.

Review, rank, and improve AI-generated code across languages, focusing on Ruby. Repair/refactor code, provide detailed written justifications, and inject ratings/edits/test results into the RLHF pipeline to help train models.

Review, rank, and improve AI-generated code to train LLMs: compare implementations, repair/refactor for correctness, efficiency, and style, and provide detailed feedback for RLHF pipelines. Work asynchronously as a remote contractor, injecting ratings, edits, and test results to improve model outputs.

Evaluate, rank, repair, and refactor AI-generated code to improve correctness, efficiency, and style; provide detailed written feedback for RLHF pipelines; and help maintain the code-evaluation and training workflow remotely.

Review, rank, repair, and refactor AI-generated code to improve correctness, performance, and style. Provide detailed written feedback and edits for RLHF pipelines, converting expert judgments into signals used to train models. Work asynchronously as a remote 1099 contractor.

Lead architectural development across core products, focusing on operational excellence and innovation while driving collaboration and growth within teams.

The Senior Fullstack Software Engineer will analyze, design, develop, and maintain software systems, focusing on scalable architecture and high-load services.

Develop C/C++ software for payment terminals (countertop and handheld), integrating card and mobile payment technologies, secure cryptographic transactions, and SOAP/JSON web services. Participate across the software lifecycle, implement secure, maintainable code, troubleshoot defects, and collaborate with customers and team members to shape product solutions.

The Senior Software Engineer will design, develop, and maintain software solutions, focusing on customer identity verification and data analysis while collaborating with cross-functional teams to deliver robust products.

Work in an agile development team to design, test-first develop and deploy high-quality C#/.NET services on Azure. Contribute to new features, improve code and scalability, participate in Tech Develops days, and collaborate across teams.

As a Software Engineer II at Proofpoint, you will enhance backend services for their Email Security platform, focusing on cloud modernization, developing APIs, and improving CI/CD pipelines.

The Senior Programmer Analyst will lead development using modern software engineering and DevOps practices, requiring extensive Java and Go expertise, along with fostering collaborative developer culture.

The Senior Software Engineer will develop backend systems and Market Data APIs, focusing on high-performance solutions in a fast-paced environment, utilizing cloud-native technologies.

Develop backend systems and APIs for market data processing, focusing on scalability and performance while utilizing cloud-native technologies.

Design and implement billing systems while optimizing performance and mentoring engineering teams. Collaborate with finance and compliance to translate business needs into technical solutions.

As a Software Engineer Intern, you'll develop innovative solutions, gain exposure to the software development lifecycle, and collaborate in an Agile environment at Visa.

The Senior Software Engineer will lead full-stack initiatives, design core organization management experiences, mentor team members, and leverage AI tools in development processes to enhance productivity.

As a Senior Software Engineer, you'll enhance telematics systems for safety event detection, build scalable solutions, and collaborate cross-functionally while mentoring engineers.