EJ
Senior Software Engineering Consultancy

Cloud-native
systems.
Done properly.

Senior technical leadership and full-stack engineering for enterprise clients — across financial services, public sector, and regulated industries. On Azure, the right way, with patterns that scale.

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What we do

Four things. Done at senior level. Done properly.

No account managers. No juniors on your project. Direct access to the engineers who are actually building it and accountable for every line.

01
Architecture & System Design
Azure cloud-native architectures, event-driven microservices, DDD, CQRS, Clean Architecture. Decisions that survive the project, not just the sprint.
02
Full-stack Delivery
.NET Core APIs, React/Next.js frontends, Cosmos DB, Azure SQL, AKS, Terraform. The entire stack owned by one senior engineer — no handoff gaps.
03
AI Integration
Azure OpenAI, RAG pipelines, embeddings, manage-by-exception analysis. Production-grade AI wired into real business workflows — not demos.
04
Engineering Standards
CI/CD, Gitflow, TDD, Testcontainers, SonarQube, Liquibase, structured logging, zero-downtime deployment. Practices that let teams move fast without breaking things.
About

20+ years of hard-won experience.

Elastic Jelly Ltd is a specialist software engineering consultancy based in Northumberland, founded by Mark Gent — a senior full-stack engineer and architect with over two decades of commercial experience across financial services, public sector, and enterprise.

The business works directly with clients, without agency intermediaries. Associate engineers are senior practitioners with complementary specialisms, brought in on a project basis as scope demands.

Most consultancies sell you a team and manage the relationship. Elastic Jelly sells you direct access to senior engineers who write the code, make the architectural decisions, and are personally accountable for what gets shipped.

20+
Years commercial engineering
3M+
Customers on platforms built
MSc
Computing Science Newcastle
0
Middlemen between you and the engineer
Technical stack

The technologies we work in every day.

Backend & API
C# .NET Core Web API MediatR / CQRS DDD Azure Functions Node.js FluentValidation Serilog
Azure & Cloud
Azure Service Bus Cosmos DB AKS Terraform Azure SQL Azure OpenAI App Insights AWS SNS/SQS
Frontend
React Next.js Angular AG Grid PWA / Offline IndexedDB Tailwind CSS
Data & DevOps
MongoDB MSSQL Liquibase Docker Kubernetes CI/CD (ADO/GH) Testcontainers SonarQube
Experience

20+ years across financial services, public sector, and enterprise.

Jul 2025 – Present
Current
DEFRA Digital
Via Elastic Jelly Ltd
Tech Lead (Full-stack)
Leading engineering on a livestock traceability platform for DEFRA. Event-driven microservices, DDD, TDD. Establishing engineering best practices — branching strategy, testing pyramid, code review standards, structured logging. Cross-functional leadership across engineering and business stakeholders.
.NET CoreNode.jsDDDAWS SNS/SQSMongoDBTDD
Dec 2024 – Jun 2025
Homes England
Via Elastic Jelly Ltd
Senior Developer
Senior full-stack development on cloud-native Azure platforms. Cosmos DB, AKS, Azure Service Bus, Angular. High-profile brownfield and greenfield delivery programmes.
.NET CoreAngularCosmos DBAKSAzure
Feb 2023 – Dec 2024
ClearBank
Senior Software Engineer
Built and maintained cross-border payments microservices for a UK clearing bank. Event-driven architecture with Azure Service Bus, Cosmos DB, AKS, and Terraform. Inbox/Outbox pattern for guaranteed message delivery across multiple jurisdictions. DDD and CQRS throughout.
Azure Service BusCosmos DBAKSTerraformDDDCQRS
Apr 2022 – Feb 2023
NewDay
Software Engineer
Consumer credit platform engineering. Azure Functions, Cosmos DB, Azure DevOps CI/CD pipelines. Event-driven integration across credit products.
Azure FunctionsCosmos DBAzure DevOps.NET Core
Nov 2020 – Mar 2022
Vanquis Bank
Principal Engineer
Principal engineer on a Single Customer View platform serving 3 million customers. Built reusable microservice patterns adopted across the engineering department — DDD, Clean Architecture, CQRS, Service Bus, Cosmos DB. React/Next.js frontend. AKS, Terraform.
DDDClean ArchitectureReact/Next.jsCosmos DBAKSTerraform
Feb 2017 – Nov 2020
Homes England
Senior Developer
Senior full-stack developer across multiple high-profile government housing programmes. Azure, Cosmos DB, AKS, Auth0, Event sourcing, Angular, .NET Core. Greenfield platform delivery from architecture through to live operation.
AzureCosmos DBAngularAuth0Event sourcing
Education
MSc Computing Science
Newcastle University · 2002–2003
BEng(Hons) Aerospace Engineering
University of Liverpool · 1998–2001
The team

Senior-led. Associate-augmented.
No juniors in the room.

Mark is the constant on every engagement — the person accountable for quality and communicating directly with the client. Associate engineers are drawn from an established professional network: senior practitioners with 10+ years each, who have worked together on real projects and share the same standards.

This model gives you the scale of a team when needed, without the overhead of a large consultancy. Associates are not subcontracted from an agency — they are known quantities with track records the lead can vouch for directly.

Contact
Let's talk about
your project.

Whether you're modernising a legacy system, building cloud-native from scratch, or need senior technical leadership for a specific phase — get in touch for an honest conversation about fit.

mark@elasticjelly.co.uk
Mark Gent
Technical Director, Elastic Jelly Ltd
Steel Rigg, Capheaton
Northumberland, NE19 2AZ
VAT No. 392697834