Lead Software Engineer in London

Energy Jobline is the largest and fastest growing global Energy Job Board and Energy Hub. We have an audience reach of over 7 million energy professionals, 400,000+ monthly advertised global energy and engineering jobs, and work with the leading energy companies worldwide.

We focus on the Oil & Gas, Renewables, Engineering, Power, and Nuclear markets as well as emerging technologies in EV, Battery, and Fusion. We are committed to ensuring that we offer the most exciting career opportunities from around the world for our jobseekers.

Job Description

Lead Software Engineer | Major Legacy Transformation (NPPV3 & SC Required)

Rate: £550 per day (Inside IR35)

Location: London / Remote Hybrid

Duration: 6–12 Months

Clearance: Active NPPV3 and SC Clearance (Essential)

The Opportunity

Our client, a premier global consultancy, is seeking a Lead Software Engineer to take the helm of a business-critical modernisation programme for a major public sector body.

This is a high-impact role requiring a technical leader capable of deconstructing complex legacy architectures and rebuilding them for a cloud- future. You will be responsible for the strategic migration from on-premise data centres to AWS, shifting from Oracle to PostgreSQL, and evolving Java EE/EJB environments into modern Spring microservices.

Technical Technical Requirements

To succeed in this role, you will need a deep background in enterprise-scale migrations:

• Java Modernisation: Extensive experience migrating legacy Java (EE/EJB) to modern versions (Spring / Java 11).
• Data & Cloud Transition: Proven track record of moving workloads from Oracle (PL/SQL) to PostgreSQL and migrating from physical Data Centres to AWS.
• Legacy OS Knowledge: Comfortable navigating environments across Red Hat Enterprise Linux 8, Oracle Solaris, and Windows Server (2008–2019).
• Geospatial Integration: Experience with GIS tools including JavaScript/OpenLayers, TileCache, and MapServer.

Mandatory Criteria

• Active Security Clearance: You must hold current, active NPPV3 and SC Clearance. We cannot consider candidates without these active clearances due to the immediate start date.
• Leadership: Experience leading technical teams through the full software development lifecycle (SDLC) within a consultancy or government framework.
• Availability: Must be available to start within 1–2 weeks.

Skills (Nice to Have)

• IBM Initiate (Master Data Management).
• Experience with Nginx, Apache Tomcat, and ETL processes.
• Exposure to Cognitec FaceVACS, MiniO, or Virtualisation technologies.

Why Apply?

This role offers the chance to lead a high-profile digital transformation that directly impacts UK infrastructure. While the role is Inside IR35, it offers a long-term engagement with a consultancy known for its prestigious project pipeline.

If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.