Mobilunity

On behalf of our Client from the  USA, Mobilunity is looking for a Senior Shopify Developer.

Our Client specializes in developing innovative digital solutions for businesses, focusing on modular e-commerce, web performance optimization, and AI-driven retail technologies. They create flexible, API-first architectures that enhance scalability and user experience. Their expertise includes AI-powered recommendations, conversational commerce, and tailored digital experiences across various industries. With a customer-centric approach, they integrate artificial intelligence to drive efficiency and growth.

They are seeking a Senior Shopify Engineer with lead potential to architect enterprise-level commerce solutions and steer their technical direction. This role requires a blend of deep frontend mastery and sophisticated backend integration skills, combined with the ability to navigate complex problem statements and mentor a growing development team.

Role Overview: As a Senior Shopify Engineer, you will bridge the gap between business requirements and technical architecture. You will collaborate closely with Lead Architect to contribute to technical discovery sessions, design custom integrations for Shopify Plus merchants, and own the development of the most complex platform features. A core part of this role involves technical leadership: you will navigate the solution path for complex projects, groom technical stories, and delegate specific implementation tasks to the Shopify Engineering team.

Key Responsibilities:

• Collaborative Discovery: Work alongside the Architect during client-facing discovery sessions to identify technical risks and opportunities. Use your depth of experience to guide conversations and translate merchant needs into robust technical roadmaps.
• Advanced Development: Act as the primary developer for the most difficult and nuanced project components. You are expected to be hands-on, developing complex solutions rather than simply handing off designs.
• Backlog Grooming & Handoff: Define technical tasks and specifications for Shopify Engineers. Groom user stories into actionable development tasks, providing the necessary technical context for the base engineering team to succeed.
• Solution Architecture: Contribute to the technical design of enterprise-scale Shopify Plus stores, making critical decisions on theme architecture vs. custom app builds vs. third-party integrations.
• Advanced Integrations: Architect and implement secure connections between Shopify and enterprise systems (ERPs, CRMs, OMS, and PIMs) using GraphQL and REST APIs.
• Shopify Plus Mastery: Spearhead the implementation of advanced Plus features, including Checkout Extensibility, Shopify Functions, B2B logic, and complex metaobject architectures.
• Performance & Security: Support and help drive the end-to-end performance strategy and security posture for high-volume stores, ensuring scalability during peak traffic events (Black Friday/Cyber Monday).

Required Skills & Experience:

• 5+ years of professional frontend or full-stack experience, with at least 3 years dedicated to the Shopify platform.
• Advanced Platform Knowledge: Expert-level mastery of Shopify Plus, including its limitations and extensibility points.
• API Expertise: Deep experience with the Shopify GraphQL Admin API and Storefront API.
• Backend Proficiency: Ability to build and maintain custom Shopify apps (Node.js/Remix or similar) or middleware when off-the-shelf solutions are insufficient.
• Modern Tooling: Expertise in Shopify CLI, CI/CD pipelines for commerce, and advanced Git workflows.
• Strategic Problem Solving: Proven track record of solving non-standard commerce problems that require moving beyond Liquid templates.
• Technology Selection: Ability to articulate the trade-offs between different technical approaches (e.g., Headless vs. Hydrogen vs. Liquid-first) to both internal teams and clients.
• Problem Finding: A proactive approach to identifying technical debt or performance bottlenecks before they impact the merchant’s bottom line.
• Leadership & Delegation: Strong ability to break down complex project goals into actionable tasks for other developers.
• Client Consultation: Excellent communication skills to lead technical discussions with enterprise-level stakeholders.
• Decision Making: Confidence in making high-stakes technical choices and standing by them under project pressure.

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 is designed to meet our team’s 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 Mobile QA Engineer.

Our Client provides a mobile application that delivers multilingual, easy-to-use informational guides to a global audience, with a strong focus on usability and performance in emerging markets. They are seeking a skilled Mobile QA Tester to help ensure a seamless user experience across diverse devices, especially low-spec smartphones common in Africa.

As a Mobile QA Tester, you will be responsible for testing their mobile app across multiple devices and OS versions to ensure high-quality performance, usability, and localization accuracy. Your work will directly impact product stability and user satisfaction, particularly in markets where device limitations and language adaptability are key success factors.

Responsibilities:

• Plan, execute, and document mobile testing across Android and iOS devices
• Test app features thoroughly for functionality, UI/UX, performance, and localization
• Validate the app on low-spec devices typical to African and emerging markets
• Identify, report, and help track bugs using a bug tracking system (e.g., Jira, Trello)
• Perform localization and language testing, especially for Japanese (JP) and English (EN) content

Required Skills & Experience:

• 3+ years of experience in mobile app testing (Android and/or iOS)
• Ability to read/understand Japanese (JP) – helps with localization verification
• Strong experience with manual testing; automation experience is a plus
• Comfortable testing on low-spec devices (memory/CPU constrained; older OS versions)
• Clear and professional communication in English

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 is designed to meet our team’s 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 UK, Mobilunity is looking for a Senior Applied AI Engineer.

In this role, you will own and drive large portions of our AI agent infrastructure, from designing and deploying multi-agent systems to integrating Retrieval-Augmented Generation (RAG)pipelines, and evaluation frameworks. You will be responsible for delivering AI-powered features into production at scale — ensuring they are performant, reliable, and secure —while also contributing across the stack, from frontend interfaces to backend APIs, databases, and deployment pipelines.

Full-time, long-term.

Schedule:For candidates outside UK - during UK business hours.
Requirements:

• Build, test, and deploy backend services and APIs (Python/ Django/ FastAPI preferred, but other languages/frameworks welcome).
• Collaborate with founders, growth team, designers, and other engineers to deliver high-impact features.
• Ensure scalability, performance, and security across the stack.
• Develop and deploy AI-powered features in production, including RAG(Retrieval-Augmented Generation) systems, multi-agent infrastructure, and evaluation frameworks (Evals).
• Create data pipelines for AI model training, evaluation, and continuous improvement.
• Mentor junior developers and promote engineering best practices.

Requirements:

• 5+ years of professional software engineering experience.
• Hands-on experience building and deploying AI applications in production environments.
• Strong backend development skills (Python preferred)
• Solid understanding of relational databases.
• Experience with Git and collaborative development workflows.
• Knowledge of cloud infrastructure, containerization (Docker, Kubernetes), and CI/CD pipelines.
• Strong problem-solving skills and a passion for building great products.
• Experience implementing background workers and task queues (Celery, RQ, etc.).
• Proficiency with Redis for caching, pub/sub, or job queues.
• Hands-on experience building and deploying AI applications in production environments.
• Experience implementing RAG pipelines, AI agent orchestration, and performance monitoring.
• Familiarity with LLM evaluation techniques and tools for measuring model accuracy, reliability, and 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!

On behalf of our Client, a well-established financial institution from the Netherlands, Mobilunity is looking for a Full Stack developer for a longterm engagement.

Our Client is building a powerful new SaaS platform for premium restaurants to manage their own e-commerce, visibility, and retention—replacing tools like Shopify, Mailchimp, and Clavio with a tailored all-in-one solution.

To support this transformation, we’re seeking a hands-on Technical Lead who will architect solutions, guide developers, and collaborate deeply with product and business stakeholders. You’ll drive engineering decisions and ensure the delivery of scalable, clean, and reliable systems.

Key Responsibilities:

• Develop clean, scalable code using Python (Django) 70% and React/Next.js 30% or vice verse
• Collaborate with tech lead and product manager to refine implementation
• Take ownership of services end-to-end: from feature spec to delivery
• Work across backend and frontend, with focus flexibility (backend-leaning or frontend-leaning is OK)
• Embrace agile delivery and AI-powered workflows for speed and quality

Requirements:
 

• 5+ years in full-stack development
• Fluency in Python/Django, JavaScript/React, Next.js leaning to backend or frontend is OK
• Comfortable with PostgreSQL, REST APIs, GCP
• Proactive communication and ownership mindset
• Interest in customer experience, not just specs

Nice to Have:

• Experience in product-led SaaS environments
• Exposure to foodtech, marketplaces, or e-commerce products
• Use of AI-enhanced dev tools (Cursor, Copilot, Claude Code)

Tech Stack:

• Backend: Python, Django, FastAPI.
• Frontend: React, Next.js.
• DB: PostgreSQL.
• Cloud: GCP.
• Process: Agile, AI-enhanced workflows.
• Tools: Cursor/Claude Code, Slack, Figma.

Come on board, and let’s grow together!

Requirements: 

Project-based position for a Project Manager with specific experience in listing apps on AppExchange. 

- past experience in listing non-native Salesforce apps on AppExchange

- ability to lead and manage the whole process (development team will be on the client's side) 

- ability to solve bottlenecks at the app listing stag

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!