CrawlJobs Logo

Senior .NET Migration Engineer

weareorbis.com Logo

Orbis Consultants

Location Icon

Location:
United Kingdom , London

Category Icon

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

250000.00 GBP / Year

Job Description:

Critical Hedge Fund Migration – Senior .NET Migration Engineer. I’m working with a large Hedge Fund who are looking for a Senior .NET Migration Engineer for a 6-month rolling FTC to join a small, focused team and help deliver this migration successfully. This is a New York City–based role with a strong preference for 3 days per week in-office. The ideal candidate has led or contributed meaningfully to previous .NET migrations, and understands both the challenges and the opportunities that come with evolving a legacy codebase into a more modern stack. There’s no need for financial services experience – what matters most is a solid track record of migrating real-world systems across .NET platforms, and a sharp eye for both quality and scalability.

Job Responsibility:

  • Taking technical ownership of major parts of the migration from .NET Framework on Windows to .NET Core running on Kubernetes
  • Refactoring, rewriting, and modernising legacy codebases for performance, reliability and maintainability
  • Supporting containerisation efforts with Docker and Helm, targeting deployment into Kubernetes
  • Working within the client’s CI/CD environment (TeamCity, Octopus Deploy, GitHub Actions) to support seamless integration of new components
  • Advising on architectural best practices during the migration process, and helping mentor internal team members where needed

Requirements:

  • Deep experience with both .NET Framework and .NET Core, and demonstrable experience migrating between the two
  • Strong hands-on knowledge of Entity Framework, including the differences and pitfalls when porting to .NET Core
  • Practical experience with ASP.NET in legacy and modern contexts
  • Solid skills with Kubernetes, Docker, and Helm – ideally having deployed and operated .NET applications in containerised environments

Additional Information:

Job Posted:
December 11, 2025

Employment Type:
Fulltime
Work Type:
Hybrid work
Job Link Share:

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Senior .NET Migration Engineer

Senior C# Developer – Pricing Engines

Join a fast-paced trading tech environment where your C# code powers real-time p...
Location
Location
Netherlands , Amsterdam
Salary
Salary:
Not provided
levy-professionals.com Logo
Levy Professionals
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Extensive experience with C#/.NET in complex back-end or trading systems
  • Proven low-latency, high-throughput engineering expertise (ideally in pricing or market data)
  • Deep knowledge of concurrency, async IO, performance tuning, profiling, TCP/binary protocols
  • Strong understanding of financial markets: FX spot/forwards/swaps, bonds, IR swaps, curves, PV/DV01
  • Experience working with front-office stakeholders
  • Clear communication and the ability to simplify complex concepts
Job Responsibility
Job Responsibility
  • Build high-performance C# services on .NET Core for real-time pricing and risk
  • Refactor and migrate existing C# and Java components into a unified .NET Core platform
  • Optimise multithreading, memory, GC and network performance on bare-metal servers
  • Implement curve handling and curve location for FX, bonds and rates
  • Integrate with trading tools, market data feeds and external pricing/execution platforms
  • Ensure safe, efficient price distribution via internal messaging
  • Contribute to automated testing, CI/CD and observability in a 24/7 trading setup
  • Work in an agile DevOps team with shared support responsibilities
Read More
Arrow Right
New

Senior Backend Engineer (.Net)

This position allows you to join a fast-growing technology organization redefini...
Location
Location
Argentina , Buenos Aires
Salary
Salary:
Not provided
parserdigital.com Logo
Parser Limited
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • +7 years of experience with .NET (C#)
  • Proficiency in databases (MySQL, Postgres, NoSQL)
  • Experience in Continuous Integration and Delivery Tools: Kafka, Docker, Kubernetes, Git, Jenkins
  • Proficiency in AWS (using, deploying and maintaining services)
  • Proficiency in Terraform
  • Familiarity with API creation and RESTful services
  • Excellent written and verbal English communication skills
  • Proactivity and capacity to bring well thought solutions
Job Responsibility
Job Responsibility
  • Develop and maintain backend services in .NET (C#) using both .NET Core and legacy .NET Framework
  • Lead and execute migration of legacy services to cloud-native solutions using AWS
  • Implement and manage infrastructure as code using Terraform
  • Containerize and deploy services on AWS ECS / Fargate
  • Maintain and support live environments and CI/CD pipelines
  • Ensure software quality, performance, and reliability during development and deployment cycles
What we offer
What we offer
  • The chance to join an organization with triple-digit growth that is changing the paradigm of how software products are built
  • The opportunity to form part of an amazing, multicultural community of tech experts
  • A flexible and remote working environment
  • Fulltime
Read More
Arrow Right
New

Head of Development and Engineering

We are seeking an experienced Head of Development & Engineering to lead our tech...
Location
Location
United States
Salary
Salary:
200000.00 - 230000.00 USD / Year
evercommerce.com Logo
EverCommerce
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s or Master’s degree in Computer Science, Software Engineering, or related field
  • 10+ years in software engineering roles, with at least 5 years in senior leadership
  • Proven track record of leading large-scale system migrations (VB6 to .NET preferred)
  • Experience driving cloud migration strategies and SaaS product transformation
  • Exceptional verbal and written communication skills
  • Strong proficiency with Microsoft .NET technologies (C#, .NET Core, ASP.NET)
  • Proven leadership in guiding teams implementing microservices architecture, containerization (Docker, Kubernetes), and cloud platforms (Azure, AWS, or GCP)
  • Familiarity with CI/CD, DevOps practices, and modern software delivery pipelines
  • Knowledge of relational and NoSQL databases
  • Proficiency with tools including Jira, Confluence, Mural, Excel, and other Agile related platforms
Job Responsibility
Job Responsibility
  • Lead the migration of legacy VB6 systems into modern .NET environments
  • Architect and guide the transition of monolithic applications into microservices-based, cloud-native SaaS solutions
  • Ensure scalability, security, and high availability across all modernized platforms
  • Advocate, evangelize, and instantiate AI-powered design, build, and implementation of SW code development, review, and QA/QC
  • Align to the conceptual and logical models that support technical modernization and long-term technical strategies per CTO’s enterprise architecture
  • Working to Iterative-Agile frameworks (Scrum, LeSS, Kanban…) and embed Design/System Thinking into team’s culture
  • Lead, mentor, and inspire engineering teams to embrace AI technologies to the fullest extent possible, leading design methodologies, and best practices
  • Establish clear engineering standards, code quality practices, and review processes
  • Serve as a change agent to guide teams and stakeholders through major technology transitions, instantiate a coherent, measurable AI-powered SW Engineering team
  • Communicate technical strategies and progress effectively to both technical and non-technical stakeholders
What we offer
What we offer
  • Continued investment in your professional development
  • Day 1 access to a robust health and wellness benefits package, including an annual wellness stipend
  • 401k with up to a 4% match and immediate vesting
  • Flexible and generous (FTO) time-off
  • Employee Stock Purchase Program
  • Fulltime
Read More
Arrow Right
New

Senior Backend Engineer (.NET)

We are looking for a Senior Backend Engineer (.NET) to join a healthcare project...
Location
Location
Ukraine , Lviv
Salary
Salary:
Not provided
binariks.com Logo
Binariks
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of backend development experience with .NET Core / C#
  • Strong experience designing and building REST APIs with ASP.NET Core
  • Solid PostgreSQL skills (data modeling, query optimization, migrations)
  • Hands-on experience with AWS services: Lambda, S3, RDS, CloudWatch, SNS/SQS, Cognito
  • Experience with event-driven/message-based architectures (Amazon MSK / Kafka or similar)
  • Experience with microservices architecture and serverless patterns (AWS Lambda)
  • Working knowledge of Docker/Kubernetes (AWS EKS)
  • Experience integrating third-party notification services (Twilio, Firebase, or similar)
  • Ability to read and analyze unfamiliar codebases, including Java, to understand integration points
  • Good English communication skills for daily interaction with PM and cross-team coordination
Job Responsibility
Job Responsibility
  • Own and evolve the Lifeline Connect REST API (.NET Core) serving the Flutter mobile app
  • Manage and extend PostgreSQL data models for patient/device data, biometric records, user management, and alarm events
  • Build the alarm/notification service using AWS Lambda and Amazon MSK (Kafka), delivering notifications via Twilio and Firebase
  • Develop and maintain the IoT data enrichment pipeline, processing MQTTS device data and persisting it to InfluxDB and PostgreSQL
  • Integrate authentication and user management using Amazon Cognito
  • Contribute to building the IoT Device Manager for registration and provisioning via AWS IoT Core
  • Analyze incoming Java code deliveries from the hardware team to understand device-side logic and integration points
  • Implement integrations with third-party monitoring services and healthcare providers
  • Prepare the platform for AWS HealthLake (FHIR) integration
  • Participate in 2–3 week sprint cycles, communicating technical decisions and assessments
What we offer
What we offer
  • 18 days of paid annual leave
  • 10 sick leaves
  • Additional days off for special occasions
  • Medical Care
  • Health check-up
  • English Class
  • Play Room
  • IT Cluster membership
  • Business Trip
  • Tech Talks
  • Fulltime
Read More
Arrow Right
New

Senior Software Engineer (Full Stack)

Join BlackLine as a Senior Full-Stack Engineer on the UI Platform team. In this ...
Location
Location
Poland , Krakow
Salary
Salary:
Not provided
blackline.com Logo
BlackLine
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4–8 years of professional experience in full stack software development
  • Strong expertise in Java (OOP) and React with TypeScript
  • Solid experience with major cloud platforms (AWS, Azure, or GCP) and experience utilizing cloud-native services (serverless, managed databases, container orchestration)
  • Experience managing the lifecycle from translating stakeholder requirements into technical specifications through to final delivery
  • Hands-on experience with CI/CD tools (Jenkins, GitHub Actions) and operating in a DevOps
  • Ability to work independently on complex tasks, estimate deliverables accurately, and collaborate effectively in an agile environment
Job Responsibility
Job Responsibility
  • Component Development: Design and implement scalable features across the stack - from Java microservices to React-based front-end shells - ensuring seamless inter-app communication
  • Modernize & Migrate: Execute migration from legacy applications (.NET) to modern React-based solutions with micro-frontend App Shell architecture
  • Cloud & Platform Implementation: Build and maintain cloud-native infrastructure and deployment pipelines using Terraform, Jenkins, and GitHub Actions
  • Quality & Standards: Write clean, secure, and testable code. Implement comprehensive testing strategies (Unit, Integration) using tools like JUnit for backend and Jest/Vitest/Playwright for front-end
  • Mentorship: Mentor junior engineers, conduct code reviews, and contribute to the team’s knowledge base regarding full stack best practices
What we offer
What we offer
  • A culture that is kind, open, and accepting
  • A culture where BlackLiner's continued growth and learning is empowered. BlackLine offers a wide variety of professional development seminars and inclusive affinity groups to celebrate and support our diversity
  • Fulltime
Read More
Arrow Right

Senior Software/Platform Engineer

This long-term contract position focuses on advancing technical solutions throug...
Location
Location
United States , West Des Moines
Salary
Salary:
Not provided
https://www.roberthalf.com Logo
Robert Half
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Proficiency in programming languages such as C#, .NET, JavaScript, and Node.js
  • Experience with cloud services, including Azure DevOps and Azure Kubernetes Services (AKS)
  • Strong understanding of microservices architecture and database management, including MongoDB
  • Familiarity with CI/CD pipelines and DevOps practices
  • Expertise in system upgrades, infrastructure improvements, and application modernization
  • Knowledge of messaging systems like RabbitMQ and Azure Service Bus
  • Ability to work with tools for security vulnerability management, such as Snyk
  • Minimum of 7 years of experience in software engineering or related roles
Job Responsibility
Job Responsibility
  • Analyze existing applications, infrastructure, and CI/CD pipelines to identify areas for improvement and modernization
  • Assess legacy systems for risks, limitations, and opportunities for upgrades or replacements
  • Plan and implement strategies for system migrations, upgrades, or retirements
  • Utilize modern DevOps practices and cloud-based solutions to enhance system performance and security
  • Collaborate with engineering, infrastructure, and internal teams to address dependencies and optimize workflows
  • Document technical decisions, processes, and provide detailed implementation support
  • Deliver post-implementation support, ensuring smooth knowledge transfer and system reliability
  • Upgrade and manage messaging platforms such as RabbitMQ, ElasticSearch/Kibana, and related technologies
  • Refactor codebases to remove outdated dependencies, introducing innovative tools and solutions
  • Implement and configure security tools like Snyk to address vulnerabilities and improve release quality
What we offer
What we offer
  • medical, vision, dental, and life and disability insurance
  • eligible to enroll in our company 401(k) plan
Read More
Arrow Right
New

Senior Software Engineer (Frontend)

Join BlackLine as a Senior Front-End Engineer and contribute to the modernizatio...
Location
Location
Poland , Krakow
Salary
Salary:
Not provided
blackline.com Logo
BlackLine
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4–8 years of professional experience in front-end software development
  • Expertise in JavaScript, TypeScript, React, and modern build tools (Webpack, Vite, Rollup)
  • Solid understanding of micro-frontends, legacy modernization, and experience with CI/CD pipelines for cloud deployments
  • Experience managing the feature lifecycle: from translating stakeholder requirements into technical specifications to driving the development process
  • Proficiency in unit testing and end-to-end testing using Jest, Testing Library, Vitest, and Playwright
  • A deep understanding of design systems, including Storybook, design tokens, component-driven development, and CSS preprocessors (SASS/LESS) and responsive design for flexible layouts
  • Ability to work independently on complex tasks, estimate deliverables accurately, and collaborate effectively in an agile environment
Job Responsibility
Job Responsibility
  • Design and implement scalable front-end features and contribute to reusable component libraries, leveraging technologies such as Webpack Module Federation
  • Execute the migration from legacy .NET applications to modern React-based solutions within the micro-frontend App Shell architecture
  • Implement shared authentication and login workflows across multiple micro-apps, configure URL routing for multiple apps on the same domain, and enable inter-app communication
  • Implement performance optimizations, observability, and security improvements across assigned front-end systems
  • Write clean, secure, and maintainable code that meets performance standards
  • Champion code quality through peer code reviews, and comprehensive testing (Unit, Integration, E2E)
  • Mentor junior developers, share knowledge with the team, and contribute to continuous process improvements
What we offer
What we offer
  • A technology-based company with a sense of adventure and a vision for the future
  • A culture that is kind, open, and accepting
  • A culture where BlackLiner's continued growth and learning is empowered
  • BlackLine offers a wide variety of professional development seminars and inclusive affinity groups to celebrate and support our diversity
  • Fulltime
Read More
Arrow Right
New

Senior Software Engineer - C#, AWS

ResMed has always applied the best of technology to improve people's lives. Now ...
Location
Location
India , Bangalore
Salary
Salary:
Not provided
resmed.com Logo
ResMed
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 8+ years of experience working as a Full Stack Developer
  • Development experience with C#, with Entity/Entitycore/ADO.net framework
  • Experience with ASP.NET Core, MVC, Web API, LINQ
  • JavaScript/TypeScript, Jquery, React or Angular, HTML5, CSS3, Responsive Web
  • Experience developing enterprise software applications in an n-tier architecture
  • Experience working on complex System Architecture & Design
  • Experience migrating applications from onprem to AWS
  • Good experience working on AWS services like EC2, RDS, Lambda, S3, SNS, SQS, etc.
  • Experience with relational databases (Microsoft SQL Server, Oracle, PostgreSQL, etc.)
  • Experience developing multi-threaded applications
Job Responsibility
Job Responsibility
  • Write code to improve new/existing software solutions, services, components, and interfaces
  • Write software tests and unit tests to validate software solutions leveraging test-driven development techniques
  • Participate in architectural, design, and code reviews providing insight to other engineers and their solutions
  • Design and create relational databases leveraging data management and data structures best practices
  • Build and deploy software packages using Continuous Integration and Continuous Development best practices for delivering software as a service
  • Leverage known design patterns to design new software solutions, services, components, and interfaces for ResMed family of products
  • Troubleshoot and resolve system performance issues leveraging software algorithm design best practices
  • Leverage known secure programming principles to design new software solutions, services, components, and interfaces that meet industry and government standards for security and data protection
  • Fulltime
Read More
Arrow Right