Job Description

Role: .Net developer

Location: London, UK

Mode: Hybrid

Type: Contract

:

Role Overview:

We are seeking a

Senior .NET Developer

to design, develop, and maintain enterprise-scale applications in the energy trading and carbon credit domain. The role requires expertise in

ASP.NET Core, C#

, and

PostgreSQL

, along with strong experience in building scalable APIs, real-time features, and automated workflows. The ideal candidate will have a strong understanding of complex business logic, regulatory compliance, and modern software engineering best practices.

Key Responsibilities:

Develop and maintain enterprise-scale

.NET applications

using

ASP.NET Core 9.0

and

C#

. Design and implement

RESTful APIs

for biogas trading, inventory management, and regulatory reporting. Build complex business logic for

RINS credit calculations, LCFS compliance

, and carbon credit trading. Work with

PostgreSQL

databases and

Entity Framework Core

for data persistence. Implement

authentication and authorization

using

Azure Active Directory

and Microsoft Identity Platform. Develop

email workflow systems

and automated reporting for regulatory compliance. Create scheduled

background jobs

using

Quartz.NET

for data processing and calculations. Integrate with

Microsoft Graph API

for SharePoint document management via

Azure MS Graph

. Build

real-time features

using

SignalR

for live trading updates. Implement

data validation

using

FluentValidation

. Work with

Docker

and

OpenShift

for containerized deployments.

Required Technical Skills:

5+ years of experience with

.NET development

(C#, ASP.NET Core). Strong experience with

Entity Framework Core

and

PostgreSQL

. Proficiency in

RESTful API design

and

OpenAPI/Swagger documentation

. Experience with

authentication systems

(OAuth2, JWT, Azure AD). Knowledge of

containerization

(Docker) and orchestration tools (

Kubernetes/OpenShift

). Experience with

background job processing

and scheduled tasks. Solid understanding of

SOLID principles

and clean architecture. Experience with

unit testing

(xUnit, FluentAssertions) and

integration testing

. Familiarity with

CI/CD pipelines

and DevOps practices (e.g., Azure DevOps).
Job Type: Fixed term contract
Contract length: 6 months

Pay: 250.00-300.00 per day

Experience:

.NET development (C#, ASP.NET Core): 5 years (required) Entity Framework Core and PostgreSQL: 4 years (required) RESTful API design and OpenAPI/Swagger documentation: 3 years (required) Authentication systems (OAuth2, JWT, Azure AD): 2 years (required) Containerization (Docker) and Kubernetes/OpenShift: 4 years (required) Unit testing (xUnit, FluentAssertions): 5 years (required) * Energy trading or financial systems: 2 years (required)