Principal Technical Lead

rssb; City Of London; Hybrid; GBP 100,000 - 150,000; Full time

Benefits offered by this job

30 days leave

Private medical

Hybrid working

Season ticket loan

Cycle to work

Volunteer leave

Performance bonus

Pension scheme

Learning and development

Job summary

RSSB is seeking a Principal Technical Lead to drive hands‑on delivery of a new greenfield platform. You will lead a multi‑disciplinary sprint team, set quality standards, and make architecture‑level decisions.

The role covers integration with CRM/ERP/payments, real‑time notifications, and reporting. Hybrid working with strong benefits, plus a focus on secure‑by‑design practices and Azure deployments.

Qualifications

• Proven experience as a technical lead on a complex, multi‑service platform.
• Extensive C# and ASP.NET Core experience with RESTful APIs and EF Core migrations.
• Strong React/TypeScript frontend skills and API integration experience.
• Hands‑on Azure cloud, Kubernetes, and CI/CD expertise.

Responsibilities

• Own the technical delivery of the platform with high‑quality, production‑ready increments.
• Enforce engineering standards: coding conventions, API design, security, code reviews.
• Lead estimation, sprint planning, and backlog shaping with stakeholders.
• Contribute directly to code, especially in complex features and integrations.
• Align with architecture, articulate risks and alternatives with evidence.
• Apply secure‑by‑design and validate UI wireframes with UX input.
• Communicate technical work clearly to non‑technical audiences.
• Define and enforce CI/CD pipelines and deployment gates in Azure DevOps.

Skills

C# ASP.NET Core

React TypeScript

Azure

Kubernetes

Azure DevOps CI/CD

Security practices

API design

PostgreSQL

Python (FastAPI)

Java stack

Stripe DocuSign integration

Agile delivery

UX collaboration

Tools

EF Core

REST APIs

Job description

Overview

RSSB is now seeking an experienced Principal Technical Lead to drive the hands‑on technical delivery of a new greenfield industry services platform. This is an exciting delivery‑focused role for a senior engineer who can lead by doing: making confident technical decisions, setting the quality bar, and guiding a multi‑disciplinary sprint team to build and ship a complex system.

As Principal Technical Lead, you will deliver a suite of capabilities including workflow automation, document management, scheduling optimisation, real‑time notifications, and integrated reporting. A range of internal and external systems including CRM, ERP, payment, and document signing services will be integrated. The close date of this role is 25th October 2026.

Responsibilities

• Own the technical delivery of the platform, ensuring the team consistently ships high‑quality, production‑ready increments.
• Ensure engineering standards are followed across the team: coding conventions, API design, security practices, and code review processes.
• Lead estimation, sprint planning, and decomposition of technical work; proactively identify and manage technical risk, dependencies, and blockers.
• Collaborate with the Delivery Manager and Product Owner to shape the backlog.
• Contribute directly to the codebase. Particularly on complex features, integration points, and technically critical components. Setting the standard for others to follow.
• Ensure alignment with the solution architecture function, clearly articulating technical constraints, risks, or emerging complexity with architectural implications, supported by evidence and proposed alternatives.
• Ensure application of secure‑by‑design principles and validate and refine Figma wireframes.
• Represent the team's technical work clearly and credibly to non‑technical audiences.
• Define and enforce CI/CD pipeline standards using Azure DevOps, including branch strategy, build validation, deployment gates, and environment promotion.

Qualifications

• Proven experience as a technical lead on a complex, multi‑service platform, with direct responsibility for technical delivery quality and team output.
• Extensive C# and ASP.NET Core experience, including RESTful APIs, dependency injection, domain modelling, integration patterns, and performance considerations. Experience with Entity Framework Core code‑first migrations and data modelling.
• Strong front‑end engineering skills in React and TypeScript, including component architecture, state management, and integration with REST/SignalR backends.
• Solid understanding of event‑driven architectures.
• Hands‑on experience with PostgreSQL or comparable relational databases.
• Experience with API and application security.
• Practical knowledge of Python, including frameworks such as FastAPI.
• Practical knowledge of the Java stack.
• Proven experience with deploying and managing Azure cloud services.
• Experience deploying and operating containerised workloads in Kubernetes.Experience writing and maintaining CI/CD pipelines in Azure DevOps.
• Engagement with novel technology, such as AI, to maximise output.
• Experience collaborating with UX designers — reviewing wireframes and providing technical feedback.
• Agile delivery experience, including sprint planning, backlog refinement, estimation, and working productively with a Product Owner and Delivery Manager.
• Experience integrating with payment platforms (e.g. Stripe) and electronic signature services (e.g. DocuSign).
• Experience developing solutions within a regulated industry.
• Communicate effectively and share thoughts and ideas through methods appropriate to the audience.

Why Join RSSB?

We offer a competitive salary aligned to the public‑interest and not‑for‑profit sector, together with a strong total reward package. While this role is not positioned at top‑end technology salary levels, we believe our overall offer provides meaningful value through flexibility, benefits, and long‑term development. Our benefits package includes:

• 30 days annual leave (plus bank holidays)

• Private medical and dental cover
• Flexible and hybrid working options
• Season ticket loan and travel subsidy
• Cycle to work scheme
• Volunteer leave
• Performance‑related bonus
• Pension scheme
• Learning and development opportunities

We understand the importance ofwork-life balance,and we offer our staff the flexibility to work within our core hours and the option to vary their location between both the office and home. If you are looking for further flexibility, speak to us at interview stage so that we can consider your request.

We valuediversityand equal opportunities in employment and are committed to creating a workplace which is inclusive to everyone. As a member of theDisability Confident Scheme, we encourage candidates with disabilities who meet the minimum criteria,to apply for our jobs.If you have applied under the Disability Confident Scheme, please let us know in advance by emailing [e-mail] Find out more about Diversity and Inclusion at RSSB:Rail Safety and Standards Board Careers - VERCIDA.

If you require any reasonable adjustments with respect to our selection process including information in an alternative format, please contact us at [e-mail]