33 Rails Developer jobs in Qatar

About Lillia:

Lillia is a Digital Health company based in India and the Middle East, collaborating with healthcare partners—including clinic chains specializing in Ayurveda, Allopathy, and Homeopathy—to empower individuals to enhance their metabolic health.

Founded in 2018, Lillia leverages an innovative app-based solution that follows a three-member coaching model and clinical protocol to drive lasting behavioral change.

We are revolutionizing the way people manage their health and well-being by applying the principles of Behavioral Science, built on advanced technology to provide a seamless user experience.

Job Description:

We are looking for an experienced Backend Java Developer with 2–5 years of hands-on experience in building scalable and secure backend systems. The ideal candidate will be responsible for developing and maintaining RESTful APIs, integrating backend services with frontend applications, and ensuring system reliability and performance.

You will collaborate with cross-functional teams including frontend, data, and AI teams to deliver innovative digital health solutions. Experience or interest in agentic or multi-agent systems (Python-based) is a strong plus.

Key Responsibilities:

• Design, develop, and maintain efficient, reusable, and reliable Java code.
• Build and optimize REST APIs for mobile and web platforms.
• Integrate frontend applications (React Native / Web) with backend services.
• Ensure application performance, scalability, and security.
• Identify bottlenecks, debug issues, and implement effective fixes.
• Implement authentication, authorization, and data protection measures.
• Design and manage data storage solutions using SQL and NoSQL databases.
• Collaborate with AI and data science teams on agentic/multi-agent modules (Python).
• Participate in code reviews, maintain code quality, and follow best practices.
• Work closely with DevOps teams on CI/CD, deployment, and cloud infrastructure.

Technology Stack:

• Backend: Java, Spring Boot
• Database: MongoDB, SQL
• Cloud & DevOps: GCP, Docker, Kubernetes
• Others: Microservices, REST APIs, JWT/OAuth2
• Plus (Preferred): Python exposure, especially in multi-agent or AI-driven systems

Qualification & Experience:

• 2–5 years of backend development experience in Java/Spring Boot.
• Bachelor's or Master's degree in Computer Science or a related field.
• Strong understanding of REST architecture, microservices, and data design.
• Experience with GCP/AWS/Azure environments is a plus.
• Familiarity with Python-based agentic systems is an advantage.
• Prior experience in a startup or fast-paced tech environment is preferred.
• Passionate about writing clean, maintainable code and contributing to product innovation.

Job Type: Full-time

• Design and implement robust APIs that facilitate seamless communication between the frontend and backend components of applications.
• Optimize database queries and data storage solutions to enhance application performance and ensure scalability.
• Develop and maintain microservices architecture, enabling independent deployment and scaling of different application modules.
• Collaborate with frontend developers to integrate user-facing elements with server-side logic effectively.

• Bachelor's degree in Computer Science, Engineering, or a related field is preferred for foundational knowledge.
• Proven experience of 3+ years in backend development, showcasing a strong understanding of server-side technology.
• Familiarity with cloud platforms such as AWS, Azure, or Google Cloud for deploying scalable applications.
• Proficient in programming languages like Python, Java, or , demonstrating expertise in at least one backend framework.

Company Description

At EMMA Systems, we help airports visualize real-time data and sensory information by monitoring key parameters, conditions, and systems to optimize overall efficiency and safety. Our unique hands-on approach allows us to understand airport operations and stakeholders, enabling easy adoption of our plug-and-play A-CDM solution. Complying with EUROCONTROL A-CDM objectives, our solution is designed to improve resource utilization and event predictability through our advanced AI technologies, thereby enhancing the overall efficiency of airport operations.

Role Description

This is a full-time, on-site role for a Senior Backend Software Engineer located in Qatar. The Senior Software Engineer will be responsible for back-end web development, software development, programming, and object-oriented programming (OOP). Daily tasks include designing, implementing, testing, and maintaining software. The Senior Software Engineer will also work with other engineers to improve software quality, mentor junior engineers, and share knowledge across teams.

Key Responsibilities

• Design, build, and maintain efficient, reusable, and reliable Python code using Django.
• Develop RESTful APIs to support frontend services and mobile applications.
• Collaborate with frontend developers to define and implement data structures and APIs.
• Ensure data security, scalability, and performance in backend systems.
• Optimize backend processes to maximize speed and efficiency.
• Troubleshoot, debug, and upgrade existing backend systems.
• Write and maintain comprehensive documentation for backend systems and APIs.
• Conduct code reviews and provide mentorship to junior developers.
• Stay informed about emerging technologies and best practices in backend development
• Develop and maintain data integrations and adapters with external systems using various protocols (HTTP, TCP, message-passing, etc.).
• Experience in building resilient and multithreaded applications.

Skills and Qualifications

Education

Bachelor's or Master's degree in Computer Science, Engineering, or a related field.

Experience

5+ years of experience in backend development, particularly in Python and Django.

Technical Skills

• Expertise in Python and Django framework.
• Experience with RESTful API design and implementation.
• Strong understanding of relational databases (e.g., PostgreSQL) and NoSQL databases.
• Proficiency in version control systems such as Git.
• Familiarity with cloud services (AWS, Azure, etc.) and containerization (Docker).
• In-depth knowledge of Cross-Origin Resource Sharing (CORS), Cookies, and Caching systems.
• Skilled in Continuous Integration and Continuous Deployment (CI/CD) pipelines and tools.
• Familiarity with SSL/TLS protocols.
• Understanding of Authorization/Authentication mechanisms, including OAuth2 and OIDC.

Nice to have

• Strong analytical and problem-solving skills.
• Excellent communication and collaboration skills.
• Experience in the aviation industry and familiarity with products like AODB, RMS and A-CDM is a plus.
• Basic to advanced knowledge of front-end technologies.
• Proficiency in unit testing.
• Well-versed in system design principles.
• Strong commitment to secure coding practices
• Demonstrated proficiency in Agile methodologies, including Scrum and Kanban.
• Required experience with microservices architecture.
• Skillful in enhancing back-end system performance.

Hiring: Software Engineer

Location: Onsite – Qatar

Duration: 6 Months & Extendable

Salary: QAR 12,000/- (Full Package)

Key Skills & Experience:

• Strong expertise in Java 17, Spring Framework, and Spring Boot
• Hands-on experience with Angular, AngularJS, JavaScript, NodeJS
• Skilled in developing REST APIs and Graph Query Language (preferred)
• Solid understanding of collections frameworks
• Proficiency in SQL, PL/SQL, Oracle, MySQL, SQL Server
• Familiar with PostgreSQL, MongoDB, or NoSQL databases
• Knowledge of database design, data modeling, and administration
• Experience with NiFi and retrieving data via APIs is an advantage

Requirements:

• Minimum 5–8 years of relevant development experience
• Strong problem-solving and debugging skills

Job Type: Contract

Contract length: 6 months

Pay: QAR11, QAR12,000.00 per month

Application Question(s):

• Do you have experience working with Angular, AngularJS, JavaScript, and
• How many years of hands-on experience do you have with Java, Spring Framework, and Spring Boot?
• How many years of experience do you have with SQL, PL/SQL, and RDBMS like Oracle, MySQL, or SQL Server?
• Have you developed and exposed REST APIs or worked with HTTP REST/JSON web services?
• Do you have experience with database design, NoSQL databases (PostgreSQL, MongoDB), or using tools like Nifi?

*

What is your notice period? (Immediate / 15 days / 30 days / Other – please specify)

Ready to build the future of food?

The global food supply chain runs on outdated systems of paper and phone calls, and we believe it's time for a revolution. This inefficiency is the root cause of massive food waste, and we're on a mission to fix it.

At Wady AI, we're building the digital backbone for the entire industry. We are set to lead the race in the GCC and MENA by transforming how food moves, digitizing the supply chain, and reducing waste using the power of data.

We're looking for ambitious, passionate young talent in Qatar to join our mission. If you are an aspiring engineer in
Back End, Front End, Machine Learning, or AI
, this is your chance to build a better future with us. We're offering a bonus for those with a strong foundation in
React, React Native, and NodeJS
.

This isn't just an internship; it's an opportunity to join a team set on a global mission, with a clear path to a full-time role for the right candidate. The work is challenging, the vision is bold, and the impact is real.

If you are ready to help us build a smarter, more sustainable food system, we want to hear from you.

We have an Senior C# Developer, 6 month+ contract that has opened up

Working for a large Energy provider, specifically in their trading team, you will play a key role in designing, developing, and maintaining high-quality applications. using C# and .NET technologies.

Key responsibilities include:

• Design, development and maintenance of various applications like Trade Capture, ETRM
• Integration, Data Platforms, Pricing Engine, Charting and Algorithmic Execution.
• Integrating real-time price and trade data from various exchanges using microservice APIs. (Trayport, ICE, CME, EPEX SPOT/ETS, Nodal, OMIE, NEXTRA, EXXETA)

To be considered, applicants will need be proficient in algorithmic trading, including the development and implementation of strategies

This role can be based in London or Qatar with some travel to Qatar throughout the year.

Scale's rapidly growing International Public Sector team is focused on using AI to address critical challenges facing the public sector around the world. Our core work consists of:

• Creating custom AI applications that will impact millions of citizens
• Generating high-quality training data for custom LLMs
• Upskilling and advisory services to spread the impact of AI

As a Software Engineer (Forward Deployed), you'll collaborate directly with public sector counterparts to quickly build full-stack, AI applications to solve their most pressing challenges and achieve meaningful impact for citizens.

At Scale, we're not just building AI solutions—we're enabling the public sector to transform their operations and better serve citizens through cutting-edge technology. If you're ready to shape the future of AI in the public sector and be a founding member of our team, we'd love to hear from you.

You will:

• Partner with public sector clients to deeply understand their challenges and define AI-driven solutions
• Scope and implement comprehensive solutions to ambiguous customer problems
• Build and maintain end-to-end web applications using modern frameworks and technologies.
• Leverage database systems to manage and query data efficiently
• Deploy and manage infrastructure on cloud service environments for scalability and reliability
• Build customer facing products and integrate with AI models to deliver intelligent and interactive user experiences
• Work cross-functionally with design, product, and data teams to create robust applications
• Spend significant time onsite with clients, including traveling up to 1-2 weeks per month as needed

Ideally you'd have:

• A strong engineering background, with a Bachelor's degree in Computer Science, Mathematics, or a related quantitative field (or equivalent practical experience)
• 5+ years of post-graduation, full-stack engineering experience with demonstrated proficiency in Python, Node, React, , TypeScript/JavaScript, or similar
• Can-do attitude with a good handle on infrastructure and system design
• Experience working directly with customers and within customer infrastructure

Nice to haves:

• Proficient in Arabic
• Past experience working at a startup as a CTO or founding engineer or in a forward deployed engineer / dedicated customer engineer role
• Experience working cross functionally with operations
• Experience building solutions with LLMs and a deep understanding of the overall Gen AI landscape

PLEASE NOTE:
Our policy requires a 90-day waiting period before reconsidering candidates for the same role. This allows us to ensure a fair and thorough evaluation of all applicants.
About Us:
At Scale, our mission is to develop reliable AI systems for the world's most important decisions. Our products provide the high-quality data and full-stack technologies that power the world's leading models, and help enterprises and governments build, deploy, and oversee AI applications that deliver real impact. We work closely with industry leaders like Meta, Cisco, DLA Piper, Mayo Clinic, Time Inc., the Government of Qatar, and U.S. government agencies including the Army and Air Force. We are expanding our team to accelerate the development of AI applications.
We believe that everyone should be able to bring their whole selves to work, which is why we are proud to be an inclusive and equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability status, gender identity or Veteran status.
We are committed to working with and providing reasonable accommodations to applicants with physical and mental disabilities. If you need assistance and/or a reasonable accommodation in the application or recruiting process due to a disability, please contact us at Please see the United States Department of Labor's
Know Your Rights poster
for additional information.
We comply with the United States Department of Labor's
Pay Transparency provision
.
PLEASE NOTE:
We collect, retain and use personal data for our professional business purposes, including notifying you of job opportunities that may be of interest and sharing with our affiliates. We limit the personal data we collect to that which we believe is appropriate and necessary to manage applicants' needs, provide our services, and comply with applicable laws. Any information we collect in connection with your application will be treated in accordance with our internal policies and programs designed to protect personal data. Please see our privacy policy for additional information.

Scale's rapidly growing International Public Sector team is focused on using AI to address critical challenges facing the public sector around the world. Our core work consists of:

• Creating custom AI applications that will impact millions of citizens
• Generating high-quality training data for national LLMs
• Upskilling and advisory services to spread the impact of AI

As a Software Engineer (Product), you'll work to turn prototypes into scalable, generalized AI applications that can serve public sector clients across the world and build the tooling that will enable our operations teams to efficiently create high-quality data for AI models.

At Scale, we're not just building AI solutions—we're enabling the public sector to transform their operations and better serve citizens through cutting-edge technology. If you're ready to shape the future of AI in the public sector and be a founding member of our team, we'd love to hear from you.

You will:

• Build and maintain full stack web applications using modern frameworks and technologies
• Leverage database systems to manage and query data efficiently
• Deploy and manage infrastructure on cloud service environments for scalability and reliability
• Contribute to horizontal platform features which will be used across different client use cases
• Work cross-functionally with design, product, and data teams to create robust applications

Ideally you'd have:

• A strong engineering background, with a Bachelor's degree in Computer Science, Mathematics, or a related quantitative field (or equivalent practical experience)
• 5+ years of post-graduation, full-stack engineering experience with demonstrated proficiency in React (required), Python, Node, , TypeScript/JavaScript, MongoDB, or similar
• Solid background in algorithms, data structures, databases and object-oriented programming

Nice to haves:

• Previous experience working at a startup or in a forward-deployed role
• Experience deploying infrastructure on cloud service providers
• Experience building user interfaces and applications that leverage AI models

PLEASE NOTE:
Our policy requires a 90-day waiting period before reconsidering candidates for the same role. This allows us to ensure a fair and thorough evaluation of all applicants.
About Us:
At Scale, our mission is to develop reliable AI systems for the world's most important decisions. Our products provide the high-quality data and full-stack technologies that power the world's leading models, and help enterprises and governments build, deploy, and oversee AI applications that deliver real impact. We work closely with industry leaders like Meta, Cisco, DLA Piper, Mayo Clinic, Time Inc., the Government of Qatar, and U.S. government agencies including the Army and Air Force. We are expanding our team to accelerate the development of AI applications.
We believe that everyone should be able to bring their whole selves to work, which is why we are proud to be an inclusive and equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability status, gender identity or Veteran status.
We are committed to working with and providing reasonable accommodations to applicants with physical and mental disabilities. If you need assistance and/or a reasonable accommodation in the application or recruiting process due to a disability, please contact us at Please see the United States Department of Labor's
Know Your Rights poster
for additional information.
We comply with the United States Department of Labor's
Pay Transparency provision
.
PLEASE NOTE:
We collect, retain and use personal data for our professional business purposes, including notifying you of job opportunities that may be of interest and sharing with our affiliates. We limit the personal data we collect to that which we believe is appropriate and necessary to manage applicants' needs, provide our services, and comply with applicable laws. Any information we collect in connection with your application will be treated in accordance with our internal policies and programs designed to protect personal data. Please see our privacy policy for additional information.

Role Description

This is a full-time on-site role for a Software Engineer located in Doha, Qatar. The Software Engineer will be responsible for maintaining software applications and systems. This role requires a deep understanding of software development principles and practices.

Qualifications

• Strong foundation in Computer Science
• Proficient in Software maintenance
• Experience with Programming
• Excellent problem-solving and analytical skills
• Ability to work collaboratively in an on-site team environment
• Bachelor's degree in Computer Science, Software Engineering, or related field
• Experience in the Engineering & Construction industry is a plus

Job Type: Full-time