Senior Full Stack Developer - Portfolio Management System

  • Remote (Spain)
  • Full-time
  • Posted

on Luxoft's careers page

No Spanish required

Not mentioned in the job post: salary, visa sponsorship, relocation, where you can apply from

Project description

We are seeking an experienced Software Developer to help modernize a mission-critical Portfolio Management System (PMS) used by investment professionals across front-office investment functions. The successful candidate will play a key role in transforming a mature WPF-based desktop platform into a modern, scalable, high-performance application ecosystem. The work includes UI modernization, platform upgrades, API development, performance optimization, architecture simplification, technical debt reduction, and AI-enabled user experiences. This role is well suited to an engineer with experience in buy-side portfolio, order, execution, risk, or investment analytics platforms who is comfortable working across desktop, web, service, integration, and data layers.

Responsibilities

  • Key Responsibilities: Application Modernization
  • Upgrade and modernize existing .NET, WPF, and DevExpress applications.
  • Refactor legacy components, reduce technical debt, and improve maintainability.
  • Improve the application user experience while preserving critical front-office workflows.
  • Contribute to target architecture decisions and phased modernization plans. Performance Engineering
  • Investigate and resolve application freezing, slow response times, memory leaks, and crashes.
  • Profile and optimize desktop, server-side, database, and integration components.
  • Improve data loading, caching, processing, and resource-management patterns.
  • Implement appropriate diagnostics, logging, health monitoring, and performance measures. Architecture Simplification
  • Reduce reliance on legacy SOA, middleware, and tightly coupled dependencies.
  • Design simpler service-oriented and API-first components.
  • Support migration toward modular, scalable, and supportable architecture patterns.
  • Assess MongoDB dependencies and recommend pragmatic simplification or replacement approaches. API and Integration Development
  • Design and build secure RESTful APIs for PMS data access.
  • Develop integrations with trading, risk, reporting, analytics, and downstream systems.
  • Implement authentication, authorization, validation, auditing, observability, and error handling.
  • Produce clear API specifications and technical documentation. AI Enablement
  • Build an AI-powered prompt/chat experience within the PMS.
  • Integrate enterprise Large Language Models and approved AI services.
  • Develop prompt orchestration, tool-calling, retrieval, guardrails, and workflow automation capabilities.
  • Partner with investment users to identify and deliver high-value, controlled AI use cases. Web and Desktop Delivery
  • Maintain and enhance rich desktop capabilities while introducing web-based applications where appropriate.
  • Deliver across frontend, backend, service, integration, and data layers.
  • Apply automated testing, code review, secure development, and CI/CD practices.

SKILLS

Must have

  • 10+ years of professional software engineering experience delivering enterprise applications.
  • Strong C# and .NET experience, including legacy .NET Framework and modern .NET versions.
  • Deep experience with WPF, XAML, MVVM, desktop application architecture, and multithreading.
  • Buy-side investment technology experience, particularly in one or more of the following areas: Portfolio Management Systems (PMS) , Order Management Systems (OMS), Execution Management Systems (EMS), Front-office trading applications, Fixed income, equities, FX, derivatives, swaps, options, TRS, or CDS workflows
  • Hands-on DevExpress experience, including complex grids and performance-sensitive user interfaces.
  • Experience designing and implementing RESTful APIs using ASP.NET Core or equivalent technologies.
  • Python development experience for services, automation, analytics, or AI-related components.
  • Strong SQL Server development and performance-tuning skills.
  • Experience creating both web-based applications and rich desktop/fat-client applications.
  • Practical expertise in profiling, diagnostics, memory management, performance tuning, and production troubleshooting.
  • Experience with Git, automated testing, CI/CD, and Azure DevOps or similar engineering platforms.

Nice to have

• React, Angular, or comparable modern web framework experience. • MongoDB and data-access modernization experience. • Microservices, modular monolith, event-driven, or message-based architecture experience. • Microsoft Azure, containerization, Kubernetes, and enterprise API management experience. • Experience integrating LLMs, AI assistants, retrieval-augmented generation, tool-calling, or enterprise AI gateways. • Familiarity with application security, data entitlements, auditability, and regulated environments.

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About Luxoft

Overview

Luxoft offers the full spectrum of enterprise technology services, from modernizing legacy IT systems to delivering digital transformation at scale.