Java Software Engineer

Persistent Systems; Belfast City District; Hybrid; GBP 70,000 - 110,000; Part time

Benefits offered by this job

Competitive salary and benefits

Growth opportunities & education

Hybrid work + flexible hours

Employee engagement activities

Insurance coverage: life & health

Job summary

Persistent Systems in Belfast, Northern Ireland, is seeking a highly skilled Python Developer to design and build scalable backend systems leveraging cloud-native and microservices architectures. This role focuses on developing robust RESTful APIs, containerized applications, and deploying solutions on Kubernetes/OpenShift.

The ideal candidate has 5+ years of experience, strong Python and distributed systems expertise, and hands-on experience with containerization, DevOps practices, and cloud

Qualifications

• Senior software engineer with backend/API experience
• Hands-on API design with Java/Go
• Cloud-native architecture and containers
• Experience with distributed systems and scaling
• CI/CD and DevOps practices
• Linux and container fundamentals
• Production monitoring and incident response

Responsibilities

• Design and develop scalable RESTful APIs and backend services
• Deliver production services deployed on Kubernetes/OpenShift
• Build highly available, scalable distributed systems
• Ensure API versioning, authentication, authorization, and resilience
• Lead design discussions and mentor other engineers
• Troubleshoot production issues in distributed environments

Skills

Senior engineer

Java

Go

REST API

Kubernetes

Microservices

CI/CD

Linux

Observability

Architecture design

Mentoring

Tools

AWS

GCP

Azure

Job description

We are an AI-led, platform-driven Digital Engineering and Enterprise Modernization partner, combining deep technical expertise and industry experience to help our clients anticipate what’s next. Our offerings and proven solutions create a unique competitive advantage for our clients by giving them the power to see beyond and rise above. We work with many industry-leading organizations across the world, including 20 Fortune 50 companies and 4 of the 5 top banks in both the US and India, and numerous innovators across the healthcare ecosystem.

Our disruptor’s mindset, commitment to client success, and agility to thrive in the dynamic environment have enabled us to sustain our growth momentum. Persistent has been recognized across top industry platforms for innovation, leadership, and inclusion. We reported $1,654.4M FY26 revenue with 17.4% Y-o-Y growth. We have delivered 24 sequential quarters of growth with $436.0M in Q4 FY26 revenue, up 3.2% Q-o-Q and 16.2% Y-o-Y growth. Our 27,500+ global team members, located in 18 countries, have been instrumental in helping the market leaders transform their industries. We have been recognized as the Fastest Growing IT Services Brand Globally in the 2026 Brand Finance IT Services 25 Report. We named a Leader in the Everest Group Private Equity (PE) Services PEAK Matrix® Assessment 2026 and Software Product Engineering PEAK Matrix® Assessment 2026.

About Position:

We are seeking a highly skilled Python Developer to design and build scalable, high-performance backend systems leveraging modern cloud-native and microservices-based architectures. This role focuses on developing robust RESTful APIs, building containerized applications, and deploying solutions on Kubernetes/OpenShift platforms.

The ideal candidate will possess strong expertise in Python development, distributed systems, and event-driven architectures, along with hands‑on experience in containerization and modern DevOps practices.

• Location: Belfast, Northern Ireland
• Experience: 5+ years
• Job Type: Contract
• Hybrid- 4 days/week from Belfast Office

What You’ll Do:

• Design and develop scalable RESTful APIs and backend services using Java/GO.
• Deliver production services deployed on Kubernetes.
• Experience building highly available, scalable, and reliable distributed systems.
• Strong knowledge of API design principles, including REST, gRPC, versioning, authentication, authorization, error handling, and backward compatibility.
• Experience with microservices architectures and the operational challenges of running services at scale.
• Participate in code reviews, design discussions, and architectural improvements
• Troubleshoot and resolve issues in production and distributed environments

Expertise You’ll Bring:

• Strong professional experience as a senior software engineer building and operating backend services or APIs in production environments.
• Hands‑on experience designing, developing, and delivering APIs using Java, Go, or both.
• Strong understanding of cloud‑native application architecture, including containerized services, service‑to‑service communication, configuration management, observability, and resilience patterns.
• Experience building highly available, scalable, and reliable distributed systems.
• Strong knowledge of API design principles, including REST, gRPC, versioning, authentication, authorization, error handling, and backward compatibility.
• Experience with microservices architectures and the operational challenges of running services at scale.
• Solid understanding of concurrency, performance optimization, caching, rate limiting, retries, timeouts, and fault tolerance.
• Experience working with public cloud platforms such as AWS, GCP, or Azure.
• Experience with CI/CD pipelines and modern software delivery practices.
• Strong understanding of Linux, containers, networking fundamentals, and cloud infrastructure concepts.
• Experience with production monitoring, logging, tracing, alerting, and incident response.
• Ability to lead technical design discussions, make pragmatic architecture decisions, and mentor other engineers.
• Strong ownership mindset with a focus on reliability, maintainability, and operational excellence.

Nice to Have

• Experience building large‑scale platform services, developer platforms, infrastructure platforms, or internal service platforms.
• Experience operating mission‑critical services with strict availability, latency, or throughput requirements.
• Experience with Kubernetes‑native patterns such as Helm, Operators, Custom Resource Definitions, or GitOps workflows.
• Experience with distributed systems, stateful services, or high‑volume transactional platforms.
• Experience with cloud‑native observability tools such as Prometheus, Grafana, OpenTelemetry, ELK/OpenSearch, or similar.
• Experience implementing security best practices for APIs and cloud‑native services, including OAuth2, mTLS, secrets management patterns.
• Experience with infrastructure as code tools such as Terraform, CloudFormation etc.
• Experience improving platform reliability through SLOs, error budgets, capacity planning, load testing, chaos testing, or disaster recovery planning.
• Experience contributing to architecture standards, engineering best practices, reusable service frameworks, or shared platform components.
• Experience with performance profiling and optimization for Java or Go services
• Competitive salary and benefits package
• Culture focused on talent development with quarterly growth opportunities and company‑sponsored higher education and certifications
• Opportunity to work with cutting‑edge technologies
• Employee engagement initiatives such as project parties, flexible work hours, and Long Service awards
• Insurance coverage: group term life, personal accident, and Mediclaim hospitalization for self, spouse, two children, and parents

Values‑Driven, People‑Centric & Inclusive Work Environment:

Persistent is dedicated to fostering diversity and inclusion in the workplace. We invite applications from all qualified individuals, including those with disabilities, and regardless of gender or gender preference. We welcome diverse candidates from all backgrounds.

• We support hybrid work and flexible hours to fit diverse lifestyles.
• Our office is accessibility‑friendly, with ergonomic setups and assistive technologies to support employees with physical disabilities.
• If you are a person with disabilities and have specific requirements, please inform us during the application process or at any time during your employment

Let’s unleash your full potential at Persistent - persistent.com/careers

“Persistent is an Equal Opportunity Employer and prohibits discrimination and harassment of any kind