Senior Full Stack Engineer - UK (Remote) - £60k-£70k

I’m working with a UK-based organisation that is building a secure, offline-capable property visiting platform using modern Microsoft technologies. They are looking for a Senior Full Stack Engineer to play a key role in delivering the first iteration of a strategic cloud platform that will expand under a ‘fail fast’ innovation model.

This is an excellent opportunity for a senior engineer who thrives in structured, security-focused environments and enjoys building clean, scalable systems from the ground up.

The Opportunity

You’ll join a senior engineering team delivering a greenfield platform consisting of a .NET MAUI mobile application (iOS & Android), an Angular 21 web application, and Azure-hosted backend services built using clean architecture principles.

Reporting into technical leadership, you’ll contribute to architectural decisions while remaining hands-on across backend, frontend, cloud infrastructure, and mobile. This is a role for someone who thinks architecturally but delivers incrementally, maintaining high standards for quality, security, and performance.

The initial programme will establish the engineering standards and cloud foundation that future products will be built upon.

Key Responsibilities

You will be responsible for:

• Writing production-quality, well-tested, secure code across backend, web, and mobile
• Designing and building RESTful APIs using clean architecture principles
• Developing offline-first mobile functionality using .NET MAUI
• Building secure Angular 21 frontends using strict TypeScript and MSAL authentication
• Implementing Infrastructure as Code using Bicep
• Deploying and managing Azure-hosted services using enterprise DevOps practices
• Integrating Azure Entra ID authentication and role-based authorisation
• Collaborating closely with Product, UX (Figma), and QA teams
• Challenging ambiguity and proposing simple, robust solutions
• Contributing to architectural documentation and decision records

Tech Stack & Experience

Core technologies:

• .NET 10 / ASP.NET Core Web API
• Entity Framework Core with Azure SQL
• .NET MAUI (iOS & Android) - offline-first design
• Angular 21 (strict TypeScript)
• DevExpress DevExtreme (v25)
• Microsoft Azure (App Services, Azure SQL, Blob Storage, Key Vault, Application Insights)
• Infrastructure as Code (Bicep)
• Azure Entra ID (authentication & RBAC)
• NUnit (backend and mobile testing)
• Vitest & Playwright (frontend and E2E testing)

Desirable Experience:

• Power BI report templating
• Azure Fabric / Data Lake familiarity
• Geospatial or mapping APIs (Google Maps preferred)
• iOS exposure (ARKit / LiDAR / sensor APIs)
• Experience in regulated or security-sensitive environments

What They’re Looking For

• At least 5 years’ commercial software engineering experience
• Strong expertise in modern .NET
• Proven experience with modern Angular (v15+)
• Hands-on Azure architecture and deployment experience
• Experience implementing Infrastructure as Code
• Experience integrating Azure Entra ID
• Strong REST API design knowledge
• Experience implementing CI/CD pipelines
• Security-first mindset with strong attention to detail
• Ability to work independently within defined architectural standards
• Clear and confident communication skills

Highly desirable: experience with DevExpress / DevExtreme.

Why This Role?

This is a rare opportunity to shape a foundational cloud platform from day one using the latest Microsoft stack. You’ll work in a disciplined, enterprise-grade engineering culture where security, performance, and quality are non-negotiable - while also contributing to a wider innovation strategy that will evolve beyond the initial product.

If you’re open to a confidential discussion, apply now and I’ll be in touch.

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.

To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.

Senior Full Stack Developer - Remote - Competitive Salary

I’m working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem.

This is an excellent opportunity for an experienced full-stack engineer who thrives in structured architectural environments and enjoys building scalable, enterprise-grade systems using the latest .NET and Angular technologies.

Key Responsibilities

You will be responsible for:

• Designing and developing scalable backend services using .NET 10 and ASP.NET Core Web APIs
• Building and maintaining Angular 21 front-end applications using DevExpress DevExtreme v25
• Implementing Azure-native solutions (App Services, Azure SQL, Storage)
• Developing and maintaining Infrastructure as Code using Bicep
• Integrating Azure Entra ID for authentication and role-based access control
• Managing secure secrets via Azure Key Vault
• Writing and maintaining unit and frontend tests (NUnit and ViTest)
• Contributing to CI/CD pipeline improvements and secure deployment practices
• Participating in architecture and technical design reviews
• Ensuring all development aligns with OWASP security best practices

Tech Stack & Environment

Core technologies:

• .NET 10 / ASP.NET Core
• Angular 21 (mandatory)
• DevExpress DevExtreme v25 (mandatory)
• Entity Framework Core
• TypeScript / RxJS
• Microsoft Azure
• Azure Entra ID
• Azure Key Vault
• Bicep (Infrastructure as Code)
• CI/CD pipelines
• Bitbucket (Git)

You’ll also work closely with UI/UX teams using Figma and operate within Agile delivery frameworks.

What They’re Looking For

• 5+ years’ commercial software development experience
• Strong expertise in modern .NET
• Proven experience with modern Angular (15+ ideally)
• Hands-on Azure architecture and deployment experience
• Experience implementing Infrastructure as Code (Bicep preferred)
• Experience integrating Azure Entra ID authentication
• Strong understanding of RESTful API design
• Experience implementing CI/CD pipelines
• Background working in regulated or security-sensitive environments

Experience with DevExpress / DevExtreme is highly desirable.

Why This Role?

This is a standout opportunity for a senior engineer who values secure architecture, clean code, and modern Azure cloud engineering. You’ll join a mature technical environment with clearly defined standards, strong DevOps practices, and a genuine commitment to security and scalability.

If you’re open to a confidential discussion, apply now and I’ll be in touch.

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.

To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.

Full Stack Engineer | ASP.NET, C#, Angular | Remote (UK) | £60-70k

I’m working with a high-performing technical consultancy that specialises in delivering complex, mission-critical platforms within highly regulated industries. Their work sits at the intersection of technology, compliance, and innovation - helping organisations solve some of the toughest challenges in modern digital environments.

They’re looking for a Full Stack Developer with a strong Back End focus to join their team. You’ll be building secure, scalable systems while working closely with clients to turn early-stage ideas into robust, production-ready solutions.

You’ll be part of a team that values thoughtful engineering, clean architecture, and asking the right questions.

This role is ideal for someone who enjoys deep technical problem-solving, working in consultancy-style environments, and building systems that need to stand the test of time.

What you’ll need

• Strong experience with C# and .NET 8+ (ASP.NET Core)
• Solid Front End experience with Angular (modern versions)
• Strong database knowledge (SQL Server or PostgreSQL)
• Experience with cloud platforms (Azure or AWS)
• An advanced & holistic approach to testing (unit & integration)
• Experience working in regulated environments (eg compliance, financial systems) or consultancy
• Any specific experience within the RegTech sector would be hugely beneficial but not essential
• Confident in a fully remote working environment
• Strong communication skills, extending to conversations with clients when applicable

Click the ‘apply’ button now to find out more!

An opportunity is available for a skilled Software Engineer who is an ITSO SME to support critical transport technology systems used across the UK. This role sits within the ITSO Back Office value stream and focuses on the development, support and continuous improvement of core transaction processing platforms used by transport operators nationwide.

You will contribute to the development and support of the Transport Club HOPS, Fulfilment and Actora product suites along with associated services and shared libraries. These platforms handle journey transaction processing and message routing that underpin national transport services.

The Role - Software Engineer - ITSO SME

• Develop, maintain and support Transport Club HOPS, Fulfilment and Actora platforms.
• Deliver software enhancements across the full lifecycle from design through deployment.
• Support DevOps delivery pipelines and assist with escalations from the Transport Club Service Desk.
• Work closely with internal teams and third party clients to support platform usage and improvement.
• Contribute to ongoing improvements to engineering practices, tooling and platform performance.
• Participate in Agile delivery cycles including sprint planning, development and release.

Key Skills and Experience

• Strong experience in Java enterprise development.
• Knowledge of ITSO transport systems or standards is essential
• Experience working with relational database technologies.
• Experience developing large scale enterprise applications.
• Understanding of software engineering best practices.
• Experience with automated software testing frameworks.
• Experience working with DevOps integration and deployment pipelines.
• Experience working within Agile Scrum delivery teams.
• Familiarity with technologies such as Git, Jenkins, Groovy, Elasticsearch, Cucumber, JUnit, REST services, Angular, Node and C#.

This role suits an experienced Transport Club Software Engineer who enjoys working on large scale systems that support national infrastructure.

To apply, please send your CV by pressing the apply button

Contract Remote (occasional London travel) 450/day (inside IR35)

We’re recruiting on behalf of a major government technology programme for a senior software engineer to help design and evolve high-performance, cloud-based systems that support critical public services. This is a hands-on technical role with real influence - you’ll contribute to architecture decisions, mentor colleagues, and own complex integrations end-to-end.
Working within an Agile squad, you’ll lead technical design discussions, manage CI/CD pipelines, and play an active role in incident and change management, all within a modern Azure cloud environment.

What you’ll need

• Angular - component architecture and state management
• Node.js - async programming and API/backend services
• Azure - designing and managing scalable cloud infrastructure
• Terraform - infrastructure as code and environment automation
• Jenkins - CI/CD pipelines and automated testing
• Git - branching strategies and collaboration workflows
• Jira & Confluence - Agile delivery and documentation
• Current active SC Clearance

Job Description:

Senior developer with the following skills and experience. Strong communication and collaboration skills key for working in DevOps culture with ability to guide team members, when needed. Growth mindset.

Essential Skills:

Core AWS Services: Proficiency / understanding of key AWS services listed below:-
S3

Athena
Glue- Lambda
DynamoDB
OpenSearch
CloudFormation
API Gateway
ECS
CloudWatch

Programming and Core Services

• Fluency in Kotlin/Java, NodeJS, TypeScript

• SQL

Databases:

Experience with SQL, and NoSQL databases such as DynamoDB

Security strong understanding of security principles within the AWS environment,

including RBAC and the principle of least privilege, storing credentials securely using

Secrets Manager/KMS, and handling sensitive data such as email addresses and

tokens securely.

CI/CD Building and managing continuous integration and delivery pipelines is a

key skill. Experience with Git and GitHub Actions

Workflow Management Understanding of services like Amazon Step Functions to

implement complex workflows Desirable

Containers experience of working with Docker and ECS

Good understanding of DevOps / DevSecOps concepts

Other Skills

Monitoring and debugging familiarity with tools like Datadog

Familiarity with Angular framework

What you'll be doing: As a Senior Full Stack Developer (with front-end focus), you’ll be responsible for: - Building solutions to problems (especially solutions with a heavy front-end focus) - Design of the solution (in conjunction with Product Managers and/or other colleagues) - Helping colleagues facing issues with front-end development Day-to-day life on the Product Development team looks like: - Most of your time will be spent designing and building solutions. - For our tech stack we use: - Django/Django REST Framework/Postgres for backend, - Angular for our web application, - Flutter for our mobile application (replacing our current Ionic/Angular app later this year), - and for infrastructure we use AWS ECS/ECR, Aurora and Lambda. - For design, it’s quick brainstorming, a bit of analysis, sketching on paper or Figma, and/or jotting down a short design doc in Google Docs - A chunk of time is spent on understanding issues, users and our platform. This includes talking to ops colleagues. We take turns answering ops support requests It’s fast paced. We’re light on overhead and don’t outsource quality to a QA team. Quality, maintainability and security start at the design stage and are everyone’s responsibility. We run 2-week sprints. Each day starts with a daily 15-minute standup and then it varies a lot from there. The issues vary from sprint-to-sprint. It’s typically very user focused, but we do make time each quarter to do unsexy important stuff (refactor, pay down technical debt, database upgrades, etc). It’s not a solo effort. While we maximise the time you must put your head down and get on with cracking a problem, we grab each other for help every day. And we do peer review of design and code, while building and deploying to production regularly. If you like having a holistic view of the product (from idea to release to growth), rather than being highly specialised in one niche, you'll probably enjoy this role. What we're looking for: - General characteristics - You like solving real problems. When you make something, you make it to solve someone’s issue. You understand the issue and the person facing it. You put in a bit of extra effort to make it a good experience for the user - Uncertainty is a fun problem to figure out, rather than an annoying headache. When you don’t know the answer, you try something. You experiment. You dig. - You’re a clear concise communicator. When writing or speaking, you know which details to prioritise - KISS is important to you. You have an instinct for when a solution is too complicated for the problem - You know how to learn and skill up. When faced with a novel skill area, you can self- critique your level and push yourself to improve - You reside in the UK and don't need visa sponsorship - If you don’t live near Oxford, you are able to travel and work in our office in Oxford for a few days each quarter - Specific characteristics for this role - Taken multiple features from idea to release to growth - Having spent meaningful time as part of different teams (we’d prefer at least 6 years as a developer) - Deep front-end experience, including responsive design, for consumer facing businesses - Design sense for UX/UI. Not just writing code. May have done wireframes before. - Can look at an interface and tell if it is terrible or not - Some experience working on backend (e.g. building APIs, database design, etc) - Some experience with CI/CD or deployments in general - Ideally, some experience in an agency (for consumer facing apps) and/or early-stage consumer facing startup - Bonus points if you have experience of mobile development, whether native or through a cross-platform framework like Flutter/React Native/Ionic