Backend Developer Jobs in Northern Ireland, United Kingdom

Principal Backend Engineer leading Java architecture for global financial platforms. Drives secure, scalable microservices on AWS, mentors teams, champions engineering excellence, and shapes enterprise strategy.

Waracle Digital Technology Consultancy, a world‑class digital transformation partner, builds intelligent digital products and services for ambitious clients. As a Senior Backend Developer you will design and deliver robust .NET C# backend subsystems, champion code quality, security and mentor junior engineers while translating technical choices for clients.

Senior Backend Developer at ISC leads design of scalable backend systems using Domain-Driven Design, CQRS, and Clean Architecture. Drives technical direction, mentors developers, and sets engineering standards.

Version 1 is seeking a Senior Backend Developer to join a growing technology team delivering innovative digital solutions that enhance operational efficiency and user experiences. The role focuses on designing, developing, and supporting scalable, cloud-based applications with an emphasis on backend development, RESTful APIs, and Azure technologies.

Backend Development team builds the core systems behind BJAK's AI Neobank app, delivering reliable APIs and financial product infrastructure at scale. The role designs and implements backend services for onboarding, payments, cards, transfers, KYC and risk flows, ensures system reliability, security and observability, and collaborates with product, frontend, mobile and AI teams to launch features quickly.

BLP Digital’s Backend Engineering team builds AI‑driven ERP automation for Fortune 500 clients. The Senior Backend Developer designs scalable services, mentors peers, and shapes product architecture across a distributed cloud stack.

Waracle Digital Technology Consultancy builds intelligent digital products for ambitious clients. As a Mid-Level Backend Developer you will craft high‑quality backend features, manage cloud services in Azure, and ensure clean, maintainable code while mentoring junior team members.

Kota seeks a Senior Product Engineer (Backend) to design and build APIs and SDKs for embedded insurance and retirement benefits. The role involves system architecture, incident response, and enhancing developer experiences.

Sonatus AI + Cloud Engineering team drives AI‑enabled software‑defined vehicle platforms. The Manager leads a backend pod that designs high‑throughput Go microservices, builds resilient ingestion pipelines, and orchestrates remote fleet command.

Kota seeks a Senior Product Engineer (Backend) to design and build APIs and SDKs for embedded insurance and retirement benefits. The role involves collaborating with cross-functional teams to create scalable, secure, and developer-friendly products.

Grafana Alerting squad builds the core alerting platform for Grafana Cloud, enabling users to manage and scale alerts across on-prem and cloud environments. The Staff Backend Engineer will design, build, and operate distributed systems for alert ingestion, delivery, and evaluation, mentor teammates, and participate in on‑call rotations.

Staff Software Engineer, Backend at a partner company building developer infrastructure that powers integrations between applications and the real world. Based in Ireland, you will own critical backend systems, APIs, and services from concept through production, working closely with developer customers to turn integration challenges into scalable solutions.

Backend Engineering team at Verve's central engineering hub in Dublin builds and scales the core ad exchange and ad server functionality. The manager leads a hands‑on team, mentors engineers, drives agile delivery, and contributes to architecture and production health.

Senior Backend Engineer at Gong.io, part of the Engineering team building the Gong Revenue AI Operating System. The role focuses on designing and scaling high‑performance Java microservices that power AI‑driven revenue insights.

Heidi Health builds an AI Care Partner that supports clinicians across documentation to care delivery. As a Senior Backend Engineer you will design, build and maintain high‑performance Python backend systems, manage cloud infrastructure, data storage and message queues, and collaborate with frontend and AI teams to integrate features.

Grand is building the first purpose-built fintech for the B2B economy, creating an intelligent payment network that powers credit and transactions. As a Founding Backend Engineer you will design and build Java services, model data, create event‑driven pipelines, and integrate AI capabilities to turn raw signals into product surfaces, operating the production systems with a security‑first mindset.

DraftKings seeks a Software Engineer, Backend to build and scale real-time systems powering high-traffic sports and casino betting experiences. The role involves shipping production code, maintaining scalable APIs, and collaborating with cross-functional teams to enhance customer experiences.

eBay Application Platform – Frameworks Team builds the API foundation that powers millions of buyers and sellers worldwide. As a Senior Backend Engineer you will design, implement, and scale the GraphQL Federation platform, creating high‑performance supergraphs, tooling, and gateways that enable internal teams to deliver reliable, developer‑friendly APIs.

At DraftKings, a publicly traded (NASDAQ: DKNG) regulated gaming company headquartered in Boston, the Software Engineering Manager, Backend will lead engineering teams driving high-impact product initiatives across a dynamic, fast-paced environment. Day-to-day, you will define technical strategy, scale architecture, mentor engineering managers and senior ICs, own hiring strategy, and collaborate with Product, Design, and Business stakeholders to align engineering efforts with company goals.

Product Team at Chase Bank builds secure, scalable Java applications that empower senior bank leaders and integrate AI features into collaboration tools. The Software Engineer designs and develops internal applications, APIs and data visualizations while working in an agile environment with CI/CD practices.