Principal Engineer (SC Cleared)

CompanyMontash

LocationUnited Kingdom

Posted At1/5/2026

UK Visa Sponsorship Analytics

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Occupation Type

Industrial cleaning process occupations

Occupation Code Skill LevelIneligible

Sponsorship EligibilityIneligible for Sponsorship

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Description

Job Title - Principal Engineer (SC Cleared)

Day Rate – Up to £545 a day inside IR35

Clearance – SC Clearance required

On Call – Required as part of a 24/7 L3 support rota

Contract Length – 12 months (with scope to extend)

Role Overview

The Principal Engineer will operate as a senior technical leader within a public sector digital programme, responsible for guiding multiple engineering teams delivering business-critical services. The role combines hands-on technical leadership, architectural oversight, and mentoring, while working closely with senior stakeholders to ensure high-quality, secure, and compliant delivery.

Key Responsibilities

Lead and mentor multiple engineering teams, promoting best practices and continuous improvement
Provide technical leadership across complex systems and architectures
Engage with stakeholders across business and technology to align delivery outcomes
Own and assure technical decisions, including risk mitigation and compliance.
Support backlog refinement, user story preparation, and sprint planning

Oversee development, testing, and deployment of high-availability services

Support incident, change, service request, and problem management processes

Participate in on-call L3 support for live services

Essential Skills and Experience

Demonstrable leadership of multiple engineering teams
Strong stakeholder engagement and communication skills
Object-oriented analysis and design expertise
In-depth experience with a fourth-generation programming language
Proven mentoring and coaching capability

Desirable Skills and Experience

Strong backend development experience with Java or C#
Spring Boot, REST APIs, microservices architecture
AWS cloud services and DevOps practices
Kubernetes, Docker, Terraform, Helm, Git
Front-end technologies including JavaScript and modern frameworks
Strong testing discipline including TDD, unit, integration, and end-to-end testing
Relational databases, ideally PostgreSQL
Experience supporting live services in a 24/7 operational environment

Additional Information

Systems operate continuously and require on-call participation
Role operates within established public sector delivery and governance frameworks