Technical Implementation & Software Engineer - Java/Saas

Opus Resourcing Ltd; Cambridge; Hybrid; GBP 45,000 - 60,000; Full time

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Job summary

Opus Resourcing Ltd in Cambridge is seeking a Technical Implementation & Software Engineer to join an innovative early-stage technology startup developing cloud-based SaaS solutions in renewables.

The role blends customer-facing SaaS implementation with hands-on Java software development, roughly 60% focused on technical implementation and 40% on software engineering, with hybrid Cambridge work and UK remote considered.

Qualifications

• Experience implementing, configuring and supporting complex B2B SaaS software.
• Strong customer-facing technical experience, including requirements gathering.
• Hands-on Java development experience, with Spring Boot/Micronaut is a plus.
• Familiarity with APIs, microservices and IoT.
• Willingness to learn and adapt in a fast-moving startup.

Responsibilities

• Implement, configure and customise a complex SaaS platform to meet customer requirements.
• Work directly with customers and third-party partners to deliver technical implementations and integrations.
• Troubleshoot complex application issues, manage incidents and support production environments.
• Write, modify and test Java code, contributing to integrations, bug fixes and new functionality.
• Collaborate with Software Engineering and Product teams on development, testing and continuous delivery.
• Build and support APIs, third‑party integrations and connected IoT devices.
• Contribute to platform reliability, technical improvements and product development based on customer feedback.

Skills

SaaS implementation

Customer-facing

Java development

API integration

Problem solving

Tools

AWS

Kubernetes

Docker

Kafka

Job description

Technical Implementation & Software Engineer

is required to join an innovative early-stage technology start-up developing cloud-based SaaS solutions within the renewable energy sector.

Location:

Cambridge - Hybrid Preferred/Remote UK Considered (with ocassional travel to customers)

This is a genuinely hybrid technical role combining customer-facing SaaS implementation, software configuration and customisation, complex application support and hands‑on Java software development.

You’ll join a small, collaborative team, working directly with customers to implement, integrate and support a sophisticated SaaS platform, while contributing to software development and product enhancements.

With approximately 60% focused on technical implementation and customer enablement and 40% on software engineering, this role is ideal for someone who enjoys solving complex technical problems, writing code and taking ownership in a fast-moving start-up environment.

Key skills required for the Technical Implementation & Software Engineer

• Experience implementing, configuring, customising and supporting complex B2B SaaS software applications.
• Strong customer-facing technical experience, including requirements gathering, software implementation and stakeholder management.
• Experience in application support, incident management, troubleshooting, debugging and root cause analysis.
• Hands‑on Java development experience, ideally with some exposure to Spring Boot, Micronaut or similar frameworks.
• Understanding of APIs, third-party integrations, microservices and modern software architectures.
• Exposure to some of the following would be advantageous:
  • AWS, cloud infrastructure and CI/CD
  • Kubernetes, Docker or containerised applications
  • Kafka and event-driven architectures
  • IoT, connected devices or hardware engineering
• Strong problem‑solving and communication skills, with a proactive, adaptable approach suited to an early-stage start-up.

You don't need to tick every technical box. We're particularly interested in candidates who combine customer-facing SaaS implementation and support experience with practical Java development skills and a willingness to learn.

What you’ll do as a Technical Implementation & Software Engineer

• Implement, configure and customise a complex SaaS platform to meet customer requirements.
• Work directly with customers and third-party partners to deliver technical implementations and integrations.
• Troubleshoot complex application issues, manage incidents and support production environments.
• Write, modify and test Java code, contributing to integrations, bug fixes and new functionality.
• Collaborate with Software Engineering and Product teams on development, testing and continuous delivery.
• Build and support APIs, third‑party integrations and connected IoT devices.
• Contribute to platform reliability, technical improvements and product development based on customer feedback.

Why this role?

• Early-stage start-up - join a small, ambitious team where your contribution will have a genuine impact.
• Implementation meets engineering - a unique 60/40 blend of customer-facing technical delivery and hands‑off
• Modern technology - work with Java, cloud technologies, microservices, CI/CD and IoT.
• Ownership and influence - help shape the product, solve real customer challenges and contribute to the company's growth.
• Salary £45k-£60k + benefits + share options - an opportunity to grow alongside the business.
• Flexible working - Cambridge hybrid preferred, with remote UK candidates considered who can travel for occasional customer meetings. (Must be eligible to work)
• Purpose-driven technology - help accelerate the transition towards renewable energy.

This opportunity could suit a Technical Implementation Engineer, Java Software Engineer, Integration Engineer, Technical Consultant or Application Support Engineer who enjoys combining customer-facing technical delivery with hands‑on software engineering.