Mobilunity

On behalf of our Client from the US, Mobilunity is looking for a Java Technical Lead

You will work on mission-critical backend systems powering a large-scale US e-commerce platform. The role involves designing and developing backend services, integrations, inventory synchronization, order processing, pricing logic, and marketplace integrations supporting a high-traffic online business.

This is not a typical feature-delivery role. You’ll participate in architectural discussions, solve complex engineering problems, and collaborate directly with technical and business stakeholders to deliver scalable solutions.

Candidates must be available to work primarily during US business hours, with a preferred schedule of 1:00 PM – 8:00 PM CET.

What we’re looking for:

We’re looking for more than a Senior Java Developer.

We need an engineer who enjoys understanding business problems before proposing technical solutions.

You should be comfortable working with open-ended challenges, evaluating trade-offs, asking the right questions, and independently designing scalable backend solutions.

The ideal candidate:

• thinks beyond implementation;
• understands business impact;
• enjoys solving complex engineering problems;
• proactively identifies bottlenecks;
• can justify architectural decisions;
• understands scalability, performance and cost optimization;
• uses AI as an engineering productivity tool while applying independent judgment.

Responsibilities:

• Design, develop and maintain scalable backend services using Java and Spring.
• Build integrations with internal services, marketplaces and external partners.
• Develop REST and SOAP APIs.
• Work on inventory synchronization, pricing, catalog management and order processing.
• Participate in architecture discussions and technical decision-making.
• Troubleshoot production issues.
• Collaborate directly with engineering and business stakeholders.
• Improve system scalability, reliability and performance.
• Contribute to engineering standards and development best practices.

Requirements:

• 7+ years of commercial Java experience.
• Strong Java SE and OOP knowledge.
• Spring Boot, Spring Framework.
• Hibernate/JPA.
• REST APIs.
• SOAP.
• SQL (MySQL or similar).
• Software architecture principles.
• Experience designing scalable backend systems.
• Strong analytical and problem-solving skills.
• Advanced English.

Nice to have:

• SAP Commerce (Hybris)
• AWS
• Docker
• Kafka
• CI/CD
• GraphQL
• Marketplace integrations
• Event-driven architecture
• High-load systems
• Automotive / Retail / E-commerce
• AI-assisted development
• Experience working with US companies

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 Japan, Mobilunity is looking for a Scala Engineer based in Poland, Spain, Germany, Sweden, France, Ireland, the Netherlands, Luxembourg, or Italy.

Our client is a fast-growing fintech company based in Tokyo that offers its real-time monthly consolidated credit service all across Japan. Our client started Japan’s first instant post-pay credit service for e-commerce customers in October 2014. The main product is an online payment platform which requires no pre-registration or credit card to use; via this service the customers can purchase products online using only a mobile phone number and email address and settle a single monthly bill for all their purchases, either at a convenience store, by bank transfer or auto debit. Customers can use credit funds during a month and then return the balance to zero without paying credit interests.

This service also supports multi-pay installments and subscriptions. There are currently over 4 million accounts in use. This service got the largest investment to date in the Japanese financial tech industry, including PayPal Ventures investment.

Key Responsibilities:

You will be responsible for developing and scaling their payments platform while meeting the highest standards in terms of security, maintainability and resilience to failure. You will meet regularly with the product team to align software delivery with business goals. With the help of your team members, you will come up with software design tradeoffs and communicate them clearly to other engineers as well as product team members to implement mutually agreed-upon solutions. You will also have the opportunity to work cross functionally in feature teams to deliver product features and services. In addition to regular deliverables expected of the engineering team, you are expected to follow and stay current with industry best practices such as writing automated tests and taking part in regular code reviews to ensure quality code at its highest possible standards.

Requirements:

• Solid experience with Scala, Functional Programming and the Typelevel ecosystem
• Experience with Akka Cluster, Cats, Cassandra, Redis, Elasticsearch, Kafka
• Understanding of software architecture and design with the ability to align the overall service architecture
• Experience with building distributed systems, scalability and high throughput software
• Experience with maintaining and further developing existing code bases
• Comfortable with knowledge sharing, working on a team and building relationships
• Ability to define task outlines and deliverables, demonstrate a sense of urgency when required and manage some ambiguity and exercises good judgment when needed
• Ability to give and receive constructive feedback tactfully upstream and downstream
• Excellent communication skills, ability to interact effectively with multidisciplinary teams
• Level of English — Upper-Intermediate and higher

Nice to have:

• Experience with Event Sourcing and CQRS
• Understanding of JVM internals and performance optimization
• Experience with CircleCI, AWS, Fargate, Terraform, Datadog
• Experience working on a payment platform or other fintech field

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
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• 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!

Mobilunity is looking for  Senior Python Engineer.

You will join a small, international product team building an API-first financial technology platform that provides automated working capital solutions to UK small businesses.

The role is highly impactful: you will design and build reliable, scalable services that directly influence how businesses access working capital. You’ll work in an environment with a high level of ownership, fast feedback loops, continuous deployment, and plenty of room to shape both the technology and the product.

This is not a role where everything is already defined. You’ll work with real ambiguity, help shape evolving architecture, make decisions with incomplete information, and collaborate closely with domain experts and other engineers.

What we’re looking for:

We need an engineer who is comfortable taking ownership of complex problems, making pragmatic technical decisions, and working in a product environment where both the codebase and the domain are continuously evolving.
 

The ideal candidate:

• thinks beyond implementation;
• is comfortable making decisions with incomplete information;
• understands scalability, reliability, security and business impact;
• has strong opinions about writing high-quality, typed Python;
• enjoys system design and building well-structured APIs;
• uses AI tools as a serious part of their engineering workflow while applying independent judgment;
• is comfortable working in a collaborative, low-ego environment.
   

Responsibilities:

• Design, develop and maintain scalable backend services using Python.
• Design and implement domain services using Domain-Driven Design principles.
• Build performant, secure and fault-tolerant serverless solutions on AWS.
• Work closely with subject matter experts to translate business requirements into technical solutions.
• Participate in architectural and technology decisions at both project and company level.
• Design and maintain idiomatic APIs and service boundaries.
• Work with data modelling and SQL to support data-driven decision-making.
• Contribute to infrastructure-as-code and cloud engineering practices.
• Troubleshoot and improve production systems.
• Work with AI coding tools and model-backed product features.
• Mentor other engineers and contribute to engineering best practices.
• Work in an Extreme Programming environment with TDD, continuous deployment and fast feedback loops.
   

Requirements:

• Strong commercial experience with Python.
• Experience building and running production services on AWS.
• Hands-on experience with AWS Lambda and DynamoDB.
• Experience with event-driven AWS services such as EventBridge and/or Step Functions.
• Strong understanding of typed Python and experience with Pydantic or similar approaches.
• Experience with Infrastructure as Code, preferably Terraform.
• Strong SQL and data modelling skills.
• Experience designing scalable backend systems and APIs.
• Strong understanding of software architecture and system design principles.
• Strong analytical and problem-solving skills.
• Experience working with AI coding tools in a professional engineering environment.
• Advanced English.
   

Nice to have:

• Experience in FinTech, lending or credit.
• Experience with open banking data.
• Experience with Snowflake or similar data platforms.
• Experience with evolutionary architecture.
• Experience designing eventually consistent systems.
• Experience with domain-driven design.
• Experience with event-driven and serverless architectures.
• Experience working in regulated environments.
• Experience with GitHub Actions or similar CI/CD platforms.
   

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 France, Mobilunity is looking for an Azure DevOps 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!

Mobilunity is a Ukrainian-based and operated provider of software engineering teams. Our typical clients are European, American and Japanese startups and small-to-mid sized companies working with our teams as equal extensions to their own software departments. With our collaboration model, engineers get direct access to the client’s technical management and work hand-in-hand with their peers both on the client’s side and in Ukraine. We as the Vendor ensure all non-tech questions are solved in a supportive manner. Joining Mobilunity you will get the best from both worlds — strong support and a big community locally, and an ambitious international team.

We are expanding our sales team and are looking for a highly independent Business Development Manager to drive new client acquisition for our staff augmentation and dedicated development team services. This is a true New Business Hunter role, focused on proactively identifying prospects, opening new doors, building relationships from scratch, and leading the entire outbound sales cycle through to signed contracts. This position is dedicated to winning new business rather than managing existing accounts or customer success.

Key Responsibilities:
● Independently identify and acquire new clients for IT staff augmentation / dedicated teams services;
● Build and maintain a healthy pipeline through outbound sales activities, networking, referrals, partnerships, and industry events;
● Represent the company at industry conferences, networking events, and business meetings across Europe;
● Lead the entire sales cycle from prospecting to contract signing;
● Conduct discovery calls, identify client needs, and position relevant service offerings;
● Collaborate with recruitment, marketing, and account management teams to ensure proposed solutions are realistic and aligned with client expectations;
● Prepare commercial proposals and run the negotiations;
● Build long-term client relationships that can expand into strategic partnerships and account growth opportunities;
● Maintain accurate pipeline visibility and sales forecasting.
 

Requirements:
● Proven experience selling IT outstaffing / staff augmentation / dedicated development teams and/or Recruitment services;
● Strong understanding of the operational realities of service-based businesses and client delivery models;
● Demonstrated track record of sourcing and closing new clients independently;
● Experience converting industry events, conferences, and networking activities into business opportunities;
● Self-driven and highly autonomous;
● Strong ownership mentality;
● Advanced level of English (written and spoken).

Joining the team you will get: 

● The friendliest community of like-minded IT professionals. 

● Open knowledge-sharing culture with exclusive access to experienced specialists eager to exchange expertise across a wide range of modern technologies; 

● Flexible time-off policy, including 18 weekdays of paid time off per year, sick leave coverage, and 5 additional wellness days per year that do not require medical documentation; 

● Competitive compensation; 

● Flexibility to cooperate remotely or from our Kyiv office, equipped with a generator and Starlink to ensure uninterrupted operations; 

● Comfortable office environment with separate rooms for individual teams, quiet workspaces, and dedicated areas for relaxation; 

● Corporate events, numerous interest groups.

English B2-C1

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

They are looking for a developer to join their Al squad and assist in implementing Al features using various tools and connecting them to the existing stack built on Laravel. The ideal candidate will play a crucial role in bridging the TypeScript part to PHP within the tech stack.

    Responsibilities:

• Work closely with the Al squad to implement Al features
• Utilize multiple tools to enhance Al capabilities
• Connect Al features to our existing Laravel stack

• Bridge the TypeScript part to PHP within the tech stack
   

  Requirements:

• 5+ years of professional software development experience, with PHP/Laravel as your primary backend stack
• TypeScript skills – you can read, write using ai, and review Node.js code confidently
• Strong SQL knowledge: you write clean queries, understand indexes, and can reason about query performance at scale
• Proven ability to articulate and justify architectural decisions: weighing trade-offs around reliability, scalability, and maintainability
• Active user of Al development tools (Claude Code, Cursor, Copilot, or similar) – you’ve integrated these into your daily workflow and are curious about pushing them further

• Upper-intermediate to advanced English proficiency
   

  Will Be a Plus:

• Solid Experience of using generative Al in production
• Familiarity with OAuth2 / OIDC flows and APl authentication patterns (API keys, tokens, scopes)
• Experience with message queues or event streaming (SQS, RabbitMQ, Kafka, etc.)
   

     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 the US, Mobilunity is looking for a Senior Backend Architect (Java).
 

You will work on mission-critical backend systems powering a large-scale US e-commerce platform. The role involves designing and developing backend services, integrations, inventory synchronization, order processing, pricing logic, and marketplace integrations supporting a high-traffic online business.

This is not a typical feature-delivery role. You’ll participate in architectural discussions, solve complex engineering problems, and collaborate directly with technical and business stakeholders to deliver scalable solutions.
 

Candidates must be available to work primarily during US business hours, with a preferred schedule of 1:00 PM – 8:00 PM CET.

What we’re looking for:

We are not looking for someone who simply implements requirements.
 

We are looking for an engineer with a strong consultant mindset who:

• understands business goals before proposing technical solutions;
• is comfortable working with ambiguous requirements;
• asks the right questions instead of waiting for detailed specifications;
• evaluates architectural trade-offs between scalability, performance, operational complexity, and cost;
• independently designs scalable solutions;
• communicates technical decisions clearly to both engineering and business stakeholders;
• takes ownership of technical decisions and their business impact;
• leverages AI tools to improve engineering productivity while applying independent technical judgment.
   

Requirements:

• 8+ years of professional Java development experience.
• Strong expertise in Java SE and Spring Framework (Core, MVC, Spring Boot).
• Solid experience designing scalable backend systems and distributed architectures.
• Strong understanding of software architecture principles and design patterns.
• Experience with microservices and event-driven architecture.
• Experience with Kafka or similar messaging technologies.
• Strong SQL skills and experience with relational databases.
• Experience working with AWS or other cloud platforms.
• Strong analytical and problem-solving skills.
• Ability to evaluate scalability, performance, reliability and cost trade-offs.
• Experience participating in architectural discussions and technical decision-making.
• Experience communicating directly with business stakeholders.
• Excellent written and spoken English.
   

Responsibilities:

• Design scalable backend architecture for business-critical systems.
• Translate business requirements into technical solutions.
• Evaluate architectural alternatives and justify technical decisions.
• Improve platform scalability, performance and operational efficiency.
• Design integrations with internal systems and third-party services.
• Participate in technical strategy and long-term architecture planning.
• Collaborate directly with the CTO, Tech Lead and business stakeholders.
• Mentor engineers and contribute to engineering best practices.
• Promote AI-assisted engineering workflows across the development process.
• Take ownership of complex technical domains from design through delivery.
   

Nice to have:

• SAP Commerce (Hybris).
• Marketplace or e-commerce experience.
• High-load distributed systems.
• Automotive, retail or e-commerce background.
• Startup experience.
• Experience working directly with CTOs, founders or product leadership.
• Previous experience as a Tech Lead or Software Architect.
• Experience with AI-assisted software development (Cursor, Claude Code, ChatGPT, etc.).
   

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 France, Mobilunity is looking for an Android 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.

Requirements:

• 8+ years of experience building and shipping native Android applications using Kotlin
• Strong Kotlin expertise
• Experience with Jetpack Compose and solid knowledge of XML-based UI development
• Strong knowledge of Kotlin Coroutines and Flow
• Experience with dependency injection using Dagger 2
• Experience with multi-module architecture
• Strong understanding of MVVM and/or MVI architecture patterns
• Experience working with REST APIs
• Ability to work effectively with legacy codebases
• Experience with Gradle, including multi-flavor project configuration
• Strong product mindset with the ability to challenge existing implementations and collaborate with Product Managers
• Active daily use of AI development tools (Claude Code, Cursor, GitHub Copilot)
• Upper-intermediate to advanced English proficiency

Nice to have:

• Experience building and maintaining white-label mobile applications
• Experience with real-time communication using Socket.IO and/or WebSockets
• Familiarity with OAuth2, OIDC, and Keycloak
• Experience with feature flagging solutions (e.g. Unleash or similar)
• Experience integrating analytics platforms (e.g. Firebase, Amplitude)
• Experience with DataStore (Preferences/Proto), Room, and WorkManager for background synchronization
• Experience with Gradle dependency locking
• Experience with CI/CD pipelines
• Knowledge of the VIPER architecture pattern
• Familiarity with the Android release process, including Google Play Store and Firebase App Distribution

• Experience working on restaurant technology or other high-frequency, staff-facing consumer platforms

  English : B2-C1

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!

On behalf of our Client from France, Mobilunity is looking for a Backend Engineer – NestJS.

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 building backend applications with NestJS
• Strong product ownership with experience taking features from concept to production
• Experience designing scalable REST APIs and backend services
• Comfortable working with legacy codebases and improving existing systems
• Working knowledge of React
• Experience with AWS

• Active daily use of AI development tools (Claude Code, Cursor, Copilot)

   

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 France, Mobilunity is looking for a Full Stack C# 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.

Responsibilities:

• Developing and maintaining web-based applications across the full stack using C#/.NET and JavaScript/TypeScript
• Building responsive, user-friendly frontend interfaces
• Designing and optimizing back-end systems and databases
• Investigating, diagnosing, and resolving application-related issues across frontend and backend
• Collaborating with the team to deliver new features to clients on a regular basis

Requirements:

• 4+ years of experience in software development
• Strong knowledge of C# and .NET 8/9
• Solid experience with JavaScript/TypeScript and at least one modern frontend framework (React, Angular, or Vue)
• Proficiency with HTML and CSS
• Strong SQL knowledge and experience with PostgreSQL
• Familiarity with Entity Framework (EF Core)
• Knowledge of REST APIs
• Active use of AI-assisted coding tools (e.g., Claude Code) as part of daily development workflow
• Experience using version control systems (Git)
• Strong problem-solving skills
• Ability to communicate clearly and effectively with internal teams
• Upper-intermediate to advanced English proficiency

Will be a plus:

• Familiarity with cloud infrastructure (AWS)
• Knowledge of Docker & containerization
• Experience with CI/CD pipelines
• Interest in prompt engineering and integrating LLMs into development processes

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!