Solution Architect (.NET Applications)

NTT America, Inc.; City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A global technology firm is looking for a skilled Solution Architect to shape and deliver national-scale digital services across the UK government. This role includes technical leadership, architecture design, and collaboration in agile teams. Candidates should have extensive experience in cloud services, .NET/C#, and strong stakeholder management skills. This position offers opportunities to work on impactful projects in a diverse environment.

Benefits

Flexible work options

Continuous learning opportunities

Range of tailored benefits

Qualifications

• 5+ years of experience in architecture or senior engineering.
• Strong understanding of full software delivery lifecycle.
• Experience delivering national scale systems and services.

Responsibilities

• Provide hands-on technical leadership and deliver secure solutions.
• Shape architecture for new products and programmes.
• Lead solution design across domains.

Skills

Stakeholder engagement and management

Systems thinking

Cloud-based services

.NET/C#

CI/CD practices

Education

Relevant degree or equivalent experience

Tools

Azure DevOps

Git

Kubernetes

SQL Server

Job description

Overview

The team you'll be working with:

We’re hiring experienced, pragmatic and collaborative Solution Architects to shape and deliver national-scale digital, data and technology services across UK government. You’ll work with multi-disciplinary agile teams, make smart architectural decisions, and help our customers deliver secure, reliable and user-centred services in the cloud. While we work polyglot, this role leans .NET/C# to support upcoming programmes. If you’ve delivered systems for organisations such as the Home Office, Ministry of Justice or Ministry of Defence, fantastic; we also welcome candidates with transferable experience from complex, regulated environments.

What you'll be doing:

You may embed within an agile team or lead across several squads. You will:

• Provide hands-on technical leadership to design and deliver secure, resilient solutions.
• Shape the architecture for new products and programmes, selecting fit-for-purpose approaches and technologies.
• Lead solution design across domains (applications, data, integration, cloud, security), creating clear roadmaps and decision records.
• Balance user needs, value, cost and risk with product, delivery and engineering peers.
• Communicate complex topics clearly, from the C-suite to engineers, and build trusted relationships with senior stakeholders.
• Guide engineering practices (CI/CD, testability, operability, observability) to reduce risk and increase delivery velocity.
• Contribute to bids and estimates, aligning solutions to public sector standards and constraints.
• Champion governance and assurance aligned to GDS, NCSC guidance and the Technology Code of Practice (where applicable).

What experience you'll bring:

We care about your approach as much as your toolkit. You:

• Think in systems, design for change and make evidence-based trade-offs.
• Are comfortable moving between strategy and hands-on detail.
• Excel in stakeholder engagement and management across policy, operations and technology.
• Collaborate openly in multi-supplier environments.
• Keep users, security and operability front and centre, and write things down (standards, ADRs, risks, diagrams).

Skills & experience we value

You don’t need everything here; if you have most of it (or strong potential to learn), we’d love to hear from you.

National-scale public services

• Experience delivering national scale systems and services, ideally with departments such as the Home Office, MoJ or MoD.
• Broad expertise across integration and messaging, digital services, case management, data integration, with up-to-date awareness of emerging approaches.

Cloud & platform

• Strong knowledge of cloud-based services and cloud-native solutions on at least one major platform (Azure preferred; AWS/GCP also valued).
• Common services: containers/Kubernetes/OpenShift, serverless (e.g., Azure Functions), networking, identity, storage, and IaC ; automation and cost optimisation.

Applications & integration (.NET-focused)

• Designing modern application architectures: microservices, event-driven and API-led.
• .NET/C# , ASP.NET Core , Web APIs, gRPC; API management; messaging/streaming (e.g., Kafka, Service Bus, Event Hubs); contracts and documentation (OpenAPI/Swagger).
• Familiarity with front-end integration patterns and modern SPAs (e.g., React) is a bonus.

Data & stores

• Selecting appropriate persistence: relational (e.g., SQL Server, PostgreSQL), NoSQL (e.g., Cosmos DB, DynamoDB), caching (e.g., Redis).
• Data integration, quality, lineage and privacy-by-design.

Engineering & DevOps

• CI/CD (Azure DevOps, GitHub Actions or GitLab), Git, automated testing, security scanning, containers and infrastructure as code.
• Observability: logging, metrics, tracing, SLO/SLA thinking; designing for operability and support.

Security & assurance

• Delivering solutions with strict security controls, including environments where external security assurance is mandated.
• Building security into designs (threat modelling, identity and access, secrets management, encryption in transit/at rest).

Methods & communication

• Clear modelling and communication (C4/UML), option analysis and trade-off records.
• Creating architecture roadmaps and contributing to business cases.

Nice to have

• Experience with GDS phases (Discovery to Live) and service assessments.
• Domain-driven design, event sourcing, legacy modernisation.
• Sustainability and FinOps in the cloud.
• Certifications (e.g., Azure/AWS/GCP Architect, TOGAF), helpful but not essential.

Qualifications & eligibility

• Significant experience designing and delivering complex, distributed systems (typically 5+ years in architecture or senior engineering).
• Strong understanding of the full software delivery lifecycle and agile methods.
• Must hold current SC or be SC-clearable (generally five years’ UK residency).
• A relevant degree is welcome but not required; equivalent professional experience is valued.

Who we are:

We’re a business with a global reach that empowers local teams, and we undertake hugely exciting work that is genuinely changing the world. Our advanced portfolio of consulting, applications, business process, cloud, and infrastructure services will allow you to achieve great things by working with brilliant colleagues, and clients, on exciting projects.

Our inclusive work environment prioritises mutual respect, accountability, and continuous learning for all our people. This approach fosters collaboration, well-being, growth, and agility, leading to a more diverse, innovative, and competitive organisation. We are also proud to share that we have a range of Inclusion Networks such as: the Women’s Business Network, Cultural and Ethnicity Network, LGBTQ+ & Allies Network, Neurodiversity Network and the Parent Network.

For more information on Diversity, Equity and Inclusion please click here: Creating Inclusion Together at NTT DATA UK | NTT DATA (https://uk.nttdata.com/creating-inclusion-together)

What we'll offer you:

We offer a range of tailored benefits that support your physical, emotional, and financial wellbeing. Our Learning and Development team ensure that there are continuous growth and development opportunities for our people. We also offer the opportunity to have flexible work options.

You can find more information about NTT DATA UK & Ireland here: https://uk.nttdata.com/

We are an equal opportunities employer. We believe in the fair treatment of all our employees and commit to promoting equity and diversity in our employment practices. We are also a proud Disability Confident Committed Employer - we are committed to creating a diverse and inclusive workforce. We actively collaborate with individuals who have disabilities and long-term health conditions which have an effect on their ability to do normal daily activities, ensuring that barriers are eliminated when it comes to employment opportunities. In line with our commitment, we guarantee an interview to applicants who declare to us, during the application process, that they have a disability and meet the minimum requirements for the role. If you require any reasonable adjustments during the recruitment process, please let us know. Join us in building a truly diverse and empowered team.

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