Mobilunity

D365 F&O Developer (Part-time)(ready to work US hours (GMT-5))

On behalf of our Client, Mobilunity is looking for a D365 F&O Developer.

Our Client operates a growing eCommerce business built on Microsoft Dynamics 365 Finance & Operations. As the number of ongoing projects continues to increase, they are looking for an experienced D365 F&O Developer to strengthen their internal engineering team and independently drive key development initiatives. This is a long-term part-time opportunity (20 hours/week) with the possibility of transitioning to full-time in the future, depending on business needs.

Responsibilities:

D365 F&O Development

• Design, develop, and maintain solutions using Microsoft Dynamics 365 Finance & Operations (X++).
• Deliver new features and enhancements across the D365 platform.
• Work independently on assigned development tasks with minimal supervision.
• Troubleshoot and resolve technical issues across ERP integrations and business workflows.
• Deliver clean, maintainable, and scalable code following best engineering practices.

Integration Development

• Support and extend EDI/XML integrations between D365 and third-party partners.
• Develop and enhance XML-based import/export processes.
• Participate in migrating existing middleware functionality into native D365 endpoints.
• Collaborate on system integrations between D365 and external business applications.
• Ensure reliable and efficient data synchronization across platforms.

Architecture & System Design

• Contribute to the modernization of existing system architecture.
• Help replace legacy middleware with native D365 integration endpoints.
• Participate in technical design discussions and propose scalable implementation approaches.
• Balance performance, maintainability, and business requirements when delivering solutions.

Code Quality & Collaboration

• Follow development standards and best practices.
• Participate in code reviews and technical discussions.
• Work closely with the client’s internal D365 developers throughout the development lifecycle.
• Collaborate effectively with distributed teams during US business hours.

Requirements:

• Senior-level commercial experience with Microsoft Dynamics 365 Finance & Operations (X++).
• Solid commercial experience with C#.
• Experience working with EDI/XML integrations, or the ability to quickly ramp up in this area.
• Strong understanding of ERP integrations and business processes.
• Ability to work independently and take ownership of development tasks.
• Availability to collaborate during US business hours (GMT-5).
• Good spoken and written English.

Nice to have:

• Experience building or consuming D365 endpoints and APIs.
• Experience migrating legacy integrations or middleware solutions.
• Familiarity with SQL Server and relational databases.
• Experience working with Docker-based applications.
• Understanding of eCommerce or retail business processes.
• Experience integrating Microsoft Dynamics 365 with third-party platforms.

Engagement details:

• Part-time engagement (approximately 20 hours per week).
• Long-term contract with an expected duration of around one year.
• Possibility of transitioning to full-time in the future (not guaranteed).
• Start date: As soon as possible.

On behalf of our Client from France, Mobilunity is looking for .Net Engineer.
 

Our client is a table management software and CRM that enables restaurant owners to welcome their customers easily. The app is useful to manage booking requests and register new bookings. You can view all your bookings, day after day, wherever you are and optimize your restaurant’s occupation rate. Our client offers a commission-free booking solution that guarantees freedom above all. New technologies thus become the restaurateurs best allies for saving time and gaining customers while ensuring a direct relationship with them.
 

What you will do:

• Performance and stability work: Identify and resolve issues currently degrading the platform — missing or wrong SQL indexes on hot tables, N+1 Cosmos queries, EF Core query plans that fall off the optimiser, queue back-pressure, retry storms.
• Incident response: Act as the escalation point for the product support and dev team. Diagnose and fix issues spanning bookings, widgets, payments (Mollie / Bancontact / iDEAL), webhooks, SignalR notifications, Cosmos DB content, and SQL Server data.
• Production stewardship: Plan and execute releases to production, typically out of customer hours (releases usually go out late evening or around 2 a.m. CET to minimise blast radius). Own rollback strategies and smoke tests.
• Platform upgrade: Plan and execute upgrades to .NET, key NuGet packages (including private feeds), Azure services, and third-party integrations — without disrupting production.
• Targeted feature development: Pick up scoped backend features and changes and ship them safely.
• Internal tooling: Maintain and extend admin site
• Knowledge transfer: We want this role to actively reduce single-point-of-failure risk. You’ll pair with internal engineers, walk them through the system as you fix things, and leave behind enough context — in code comments, PR descriptions, short notes — that the platform is operable when you’re on holiday.
   

Tech Stack:

• .NET / C# (modern versions), Entity Framework Core, ASP.NET Web APIs
• Azure — App Service, Functions, SignalR Service, Service Bus / queues, Application Insights
• SQL Server (Azure SQL) with EF Core, plus direct query and index tuning
• Cosmos DB
• GitHub (Actions, private NuGet feeds), pre-prod and prod environments
• Mollie payments (Bancontact, iDEAL, cards) and other third-party integrations
   

Requirements:

• Deep Azure production ownership — ideally 8+ years where both the application layer and the cloud infrastructure are your domain. Azure is not a deployment target here — it’s part of the system you own.
• Strong DBA instincts. You can read an execution plan, recognise when EF Core is generating something the optimiser can’t use, and design indexes that match access patterns.
• Azure platform depth. Hands-on production experience with App Service / AKS, Azure SQL, Cosmos DB, Service Bus, Application Insights, and Key Vault. You know how to right-size resources, contain costs, and respond to platform-level incidents — not just application-level ones.
• Production maturity. Comfortable owning overnight releases, rollback plans, and the weight of a system where mistakes affect real restaurants in the morning service.
• Diagnostic mindset. At home in Application Insights, SQL DMVs, Cosmos metrics, and logs. Able to find root causes in a codebase you didn’t write, with significant historical complexity.
• Genuine AI-assisted developer. You use Claude Code, Cursor, Copilot, or equivalent daily — not occasionally. You know where the guardrails matter in a complex codebase, and you bring that judgment, not just the tool.
• Communication. Clear written English, transparent about risk, comfortable explaining technical trade-offs to non-technical stakeholders.
• Upper-intermediate to advanced English proficiency
   

Nice to have:

• Experience with restaurant tech, reservation systems, or any high-concurrency consumer-facing platform with payment flows.
• Experience leading the stabilisation or modernisation of a legacy .NET codebase.
• Familiarity with Mollie or similar PSPs and EU payment methods (Bancontact, iDEAL, SEPA).
   

In return we offer:

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups
   

Come on board, and let’s grow together!

Part-time, 3-4 hours a day

No need for the US time overlap, but should be available for meeting from 9 AM – 12 PM ET

On behalf of our Client from USA, Mobilunity is looking for a  Data Scientist

We are looking for a Senior Data Scientist with expertise in Large Language Models (LLMs) and
Generative AI to lead the design and delivery of end-to-end AI systems that generate
high-quality insights from complex unstructured datasets. This role requires strong ownership
across the full lifecycle from data preparation and model fine-tuning to RAG pipeline architecture
and scalable deployment on AWS.

Key Responsibilities:

• Architect and implement end-to-end LLM-based solutions for insight generation and
  automation
• Lead the design and optimization of Retrieval-Augmented Generation (RAG) pipelines,
  including ingestion, chunking strategies, embedding generation, indexing, and retrieval tuning
• Fine-tune, evaluate, and optimize LLMs using advanced techniques (e.g., instruction tuning,
  LoRA)
• Define and enforce best practices for data preprocessing, cleaning, normalization, and
  transformation across diverse data sources
• Provide hands-on guidance and code/data reviews for existing data scientists
• Help the team develop practical intuition for LLM fine-tuning and evaluation
• Establish simple, repeatable workflows for experimentation and iteration
• Prevent over-engineering and ensure focus on business outcomes
• Design scalable and cost-efficient AI/ML solutions leveraging AWS services
• Own the development of vector search infrastructure and embedding pipelines
• Establish robust evaluation frameworks for LLM outputs (accuracy, relevance, hallucination reduction)
• Collaborate cross-functionally with engineering, product, and business stakeholders to
  translate requirements into AI solutions
• Drive MLOps best practices including versioning, monitoring, CI/CD, and performance
  optimization
• Ensure data governance, security, and compliance in all AI workflows

Required Skills & Qualifications:

• Master’s or PhD in Computer Science, Data Science, Machine Learning, or related field (or equivalent experience)
• 3+ years of experience in data science, machine learning, or applied AI roles
• Experience mentoring or leading data scientists in applied ML/LLM projects
• Proven experience designing and deploying LLM-based solutions in production
• Hands-on experience fine-tuning open-source LLMs (Llama, Mistral, Qwen)
• Experience with LoRA / QLoRA approaches
• Ability to work with limited datasets and iterate quickly
• Strong understanding of trade-offs between model size, cost, and performance
• Strong expertise in RAG architectures and semantic search systems
• Deep understanding of NLP, embeddings, and transformer-based models
• Advanced proficiency in Python and ML frameworks (e.g., PyTorch, TensorFlow)
• Hands-on experience with vector databases (e.g., FAISS, Pinecone, OpenSearch, Weaviate)
• Strong experience with AWS ecosystem (e.g., S3, SageMaker, Bedrock, Lambda, EC2, Step
  Functions)
• Experience building scalable data pipelines and distributed systems
• Solid understanding of API design, microservices, and system integration

Mandatory skills:

real production experience with LLM
RAG pipelines (end-to-end)
fine-tuning (LoRA / QLoRA)
vector DB (FAISS / Pinecone / etc.)
AWS (S3, SageMaker, etc.)

Preferred Qualifications:

• Experience with RLHF, prompt optimization, and evaluation frameworks for LLMs
• Experience with real-time or streaming data pipelines
• Knowledge of cost optimization strategies for LLM workloads

English: B2

On behalf of our Client from France, Mobilunity is looking for a Fullstack Engineer.

Our client is a table management software and CRM that enables restaurant owners to welcome their customers easily. The app is useful to manage booking requests and register new bookings. You can view all your bookings, day after day, wherever you are and optimize your restaurant’s occupation rate. Our client offers a commission-free booking solution that guarantees freedom above all. New technologies thus become the restaurateurs best allies for saving time and gaining customers while ensuring a direct relationship with them.

Their goal is to become the #1 growth platform for Restaurants. They believe that restaurants have become lifestyle brands, and with forward-thinking digital products, restauranteurs will create the same perfect experience online as they already do offline, resulting in a more valuable, loyalty-led business.

Requirements:

• 5+ years of professional software development experience, with PHP/Laravel as your primary backend stack
• Strong SQL knowledge – you write queries, understand indexes, and can reason about query performance
• Experience with React or NestJS
• Proven ability to articulate and justify architectural decisions: weighing trade-offs around scalability, maintainability, and explaining the reasoning clearly to peers and stakeholders
• Fluency with REST API design and experience consuming or building JSON integrations
• Knowledge of cloud infrastructure (AWS) and containerization (Docker)
• Comfortable working in Git-based workflows with pull requests, branches, and CI gates
• Active user of AI development tools (Claude Code, Cursor, Copilot, or similar) – you’ve integrated these into your daily workflow and are curious about pushing them further
• Strong product mindset with the ability to contribute to feature design and product decisions
• A track record of working in Agile environments with cross-functional teams
• Upper-intermediate to advanced English proficiency

In return we offer:

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

🐳 Come on board, and let’s grow together! 🐳

On behalf of our Client from Switzerland, Mobilunity is looking for a Senior Full-Stack Developer.

In this role, you will be responsible for implementing new features in a modern business application, working across both backend and frontend technologies. You will contribute to the development of core platform capabilities as well as customer-specific functionality, collaborating with an international team to deliver high-quality software solutions.

We are looking for a proactive and experienced Full-Stack Engineer who enjoys taking ownership of features from concept to delivery, is comfortable working in a collaborative Agile environment, and has a passion for writing clean, maintainable code.
 

Requirements:
 

• 5+ years of professional experience in full-stack software development.
• Strong proficiency in C#/.NET (ASP.NET).
• Solid experience with Vue.js (preferably with TypeScript) or comparable frontend frameworks.
• Experience working with SQL databases, preferably PostgreSQL.
• Understanding of object-oriented programming principles and software design patterns.
• Experience with RESTful APIs and modern web application development.
• Experience with Git, GitLab CI/CD and collaborative development workflows.
• Ability to work independently while collaborating effectively within a distributed team.
• Strong analytical and problem-solving skills.
• Upper-Intermediate or higher English communication skills (written and spoken).
   

Responsibilities:
 

• Design, develop, and maintain new application features across both backend and frontend.
• Improve and enhance existing functionality to meet evolving customer needs.
• Implement customer-specific features while ensuring high code quality and maintainability.
• Participate in feature validation through acceptance testing and end-user testing as part of the shared QA process.
• Collaborate closely with product owners, developers, and other stakeholders throughout the development lifecycle.
• Contribute to technical discussions, code reviews, and continuous improvement initiatives.
• Maintain high development standards following Agile best practices.
   

In return, we offer:
 

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing to share their endless insights into the widest variety of modern technologies
• Mobilunity Medical Insurance program designed to meet our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city center (900m from Lukyanivska metro station with a green and spacious neighborhood) or remote mode engagement: you can choose a convenient one for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Never-ending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!

We’re looking for an Unreal Engine Developer to build realistic digital twins of schools and other public facilities for drone pilot training and emergency response simulations.
You’ll transform LiDAR scans, photogrammetry, drone imagery, and architectural data into interactive Unreal Engine environments, helping create high-fidelity training scenarios that mirror real-world locations.

Key Responsibilities:

• Develop and maintain digital twin environments in Unreal Engine 5.
• Integrate and optimize LiDAR scans and drone-captured 3D assets.
• Build interactive simulation features using C++ and Blueprints.
• Optimize large environments for performance and visual quality.

• Collaborate with 3D artists, drone engineers, and cross-functional teams.

   

Requirements:

• 3+ years of Unreal Engine development experience.
• Strong C++ and Blueprint skills.
• Experience building large-scale 3D environments.
• Familiarity with LiDAR or point cloud data is a strong plus.
• Experience with simulation, visualization, or digital twin projects is a plus.

Ideal Candidate:
You enjoy building realistic, large-scale virtual environments that accurately replicate real-world locations. You’re comfortable solving technical challenges around 3D data processing, optimization, and simulation, and you’re excited by the opportunity to create technology that improves training, situational awareness, and public safety.

In return we offer:
• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment – exclusive access to a rich pool of colleagues willing
to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• Perfect office location in the city-center (900m from Lukyanivska metro station with a green
and spacious neighborhood) or remote mode engagement: you can choose a convenient one
for you, with a possibility to fit together both
• No open-spaces setup – separate rooms for every team’s comfort and multiple lounge and
gaming zones
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!