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Backend Engineer

Backend Engineer

Full-Stack Engineer

MWDN

Sofiafulltime

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Role description

MWDN is an international recruitment and outstaffing company with 23+ years of experience connecting exceptional tech talent with leading companies across Israel, the USA, Great Britain, and Western Europe. In this role, MWDN acts as the recruitment partner, and the selected candidate will work directly with the client’s team on their product in an international environment.

What is your new project?:

Domain: eLearning

Location: California, USA

Company size: 11-50

Founded in: 2019

What makes this project exciting?:

Our client offers a modern compliance and eLearning platform designed to help organizations build safer, more inclusive, and productive work environments. The platform features a comprehensive library of interactive courses - covering harassment prevention, diversity and inclusion, safety, ethics, and security awareness - that are mobile-friendly and focused on achieving meaningful learning outcomes rather than just completion. It also provides advanced capabilities such as AI-assisted course creation, structured learning paths, real-time analytics, automated tracking and notifications, and adaptable LMS tools to meet organization-specific training requirements. The result is a flexible, engaging, and scalable solution that empowers teams while streamlining compliance management across industries.

Explore the open roles below and take the next step in your career!

What Makes You a Great Fit

  • 7+ years of experience building customer-facing web applications using Ruby on Rails
  • Strong experience in React
  • Experience designing and building RESTful APIs and working with relational databases
  • Comfort owning projects from concept through production, including making architectural trade-offs
  • Track record of raising the bar for the team - through mentorship, code quality, or process improvements
  • Experience with CI/CD pipelines, infrastructure-as-code, or cloud platforms (AWS preferred)
  • Responsive design, accessibility standards, and cross-browser compatibility experience
  • Experience with observability tooling (logging, monitoring, alerting)
  • Strong written and verbal communication skills in English
  • Willingness to work US timezone hours for team collaboration

Preferred Qualifications

  • Experience integrating LLMs or AI/ML services into production applications
  • Experience with A/B testing, personalization, or data-driven content customization
  • Background in a startup or high-growth environment
  • Familiarity with compliance, security awareness, or ed-tech domains.

Your Day-to-day In This Position

  • Own features end-to-end: scope the technical approach, build across frontend and backend, and ship to production
  • Design and maintain APIs, data models, and backend services that are reliable and performant
  • Build polished, accessible frontend experiences with attention to UI/UX details
  • Build and integrate AI-powered features - from personalized learningexperiences to intelligent compliance tooling - from prototype to production
  • Use AI-assisted development tools (e.g., Claude Code, Copilot) to accelerate your work and help the team adopt effective AI tooling
  • Instrument analytics and use data to guide product and engineering decisions
  • Collaborate closely with product, design, and other engineers to deliver on key initiatives
  • Identify and resolve performance bottlenecks, technical debt, and reliability issues
  • Mentor other engineers through code review, pairing, and architectural guidance

Our Next Steps
✅ Intro call with a Recruiter — ✅ Screen interview with the client — ✅ Coding Assessment — ✅ System Design — ✅ Final interview— ✅ Offer

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

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Backend Engineer

Data Engineer with Python

EPAM Systems

Sofia

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Role description

We are seeking an experienced and highly motivated
Data Engineer
to join our expanding Data Engineering practice.

This role will enhance one of our established Platform Teams, where you will design, construct, and scale data pipelines using Databricks with PySpark on Microsoft Azure, enabling our AI Factory teams to create and deploy advanced machine learning solutions.

This position offers a unique opportunity to work at the crossroads of big data, cloud frameworks, and MLOps, delivering durable, scalable, and efficient data platforms that promote innovation throughout the organization.

Responsibilities

  • Design analytical solutions using Cloud Native, Big Data, and NoSQL technologies
  • Build scalable data pipelines with Databricks and PySpark on Azure
  • Collaborate with MLOps and ML Engineering teams to deliver robust data platforms for AI model development and deployment
  • Work alongside architects, technical leads, and cross-functional teams to align solutions with business objectives
  • Assist the SAP Platform Team in utilizing SAP BTP and hyperscaler services for enterprise-grade data platforms
  • Conduct and participate in code reviews to ensure adherence to technical standards and best practices
  • Mentor junior engineers to cultivate an innovative and high-performance engineering culture
  • Implement CI/CD practices into data workflows using tools like Jenkins, GitLab CI/CD, and Concourse
  • Facilitate communication with stakeholders to understand business processes, model input data, and deliver aligned solutions

Requirements

  • Minimum of 2 years' experience in Software Engineering with a solid background in Data Engineering, Machine Learning Operations, or Machine Learning
  • Expertise in Python and PySpark
  • Familiarity with Databricks and Microsoft Azure cloud services
  • Strong knowledge of software version control tools like GitHub or Git
  • Background in CI/CD tools such as Jenkins, GitLab CI/CD, or Concourse
  • Proven capability to deliver scalable, robust, and highly available data solutions
  • Competency in problem-solving, analytical thinking, and managing stakeholder relationships

Nice to have

  • Skills in another programming language such as Java, SQL, or Scala
  • Understanding of SAP BTP or comparable enterprise data platforms
  • Background in agile development methodologies

We offer

  • Opportunity to Engineer your Future and to drive the world’s digital transformation with top industry clients
  • Personal development program that will allow you to be valued for your strengths
  • Wide range of professional trainings and workshops
  • Being part of a collaborative, fast-growing, and innovative design team
  • Established and accelerated growth toward different career paths, competencies, and roles
  • Broad projects variety and possible mobility between projects over the time
  • Collaboration in a multicultural environment and exchange of best practices with colleagues around the world
  • Varied social benefits, Sports, Transportation and Health programs
  • Work-life balance and flexible schedule, team buildings and sport opportunities
  • Modern office/collaboration spaces (incl. new Infinity Tower business center, Sofia)
  • Hybrid By Design - we provide you with the best productivity options from the 2 worlds. Meet, socialize and enjoy F2F time with your colleagues, while working from the modern EPAM's office for a few days per week and benefit from the EPAM's virtual working environment - making you able to be productive and work from remote for the rest of the week

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Java Developer (Mid/Senior)

Amusnet

Sofiasenior

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Role description

Software Engineer (Java)

Location:

Sofia, BG, 1766

Work Model: Hybrid

Amusnet is a leading provider recognized for offering the best-performing products and innovative solutions in gaming globally. With a portfolio of 300+ casino games, our company delivers engaging online entertainment across 2,000+ websites in 35+ markets. The dedication to innovation and technology also extends to the production of premium slot cabinets, where our games seamlessly integrate with cutting-edge hardware solutions. We continue to expand our network of offices, and our team now consists of 1,300+ industry professionals. As we grow, we're looking for Software Engineer (Java)!

Currently, we are looking for a Java Software Engineer to join our team! We need your bright mind and your experience to help us move our products forward, in our adventure of building the first Cloud-native system for delivering our gaming content, world-wide. The future of iGaming is here, and it's more exciting than ever!

The Perfect Team Member Is Inspired To

  • Designing, developing, and maintaining Java-based micro-services
  • Collaborating with cross-functional teams to define, design, and ship new features, as well as working with software architects to improve the performance and scalability of the software
  • Writing clean, efficient, and well-tested code
  • Participating in code reviews to ensure code quality
  • Identifying and troubleshooting bottlenecks and bugs in the software
  • Continuously discovering, evaluating, and implementing new technologies to maximize development efficiency
  • Mentoring and guiding other developers and architects on the team

The Skills That Will Grab Our Attention

  • A determined, focused team player who is able to communicate effectively with both technical and non-technical stakeholders
  • Must be self-motivated and flexible with a can-do attitude and capable of working under pressure and independently in a fast-paced and dynamic environment
  • Knowledge of agile software development methodologies, such as Scrum or Kanban
  • Experience with object-oriented programming, with a strong understanding of Java and related technologies (Gradle or Maven, Micronaut / Spring Boot)
  • Experience in API Design, including REST and GraphQL
  • Experience with relational databases (PostgreSQL or MySQL) as well as proficiency in SQL and Hibernate or JOOQ
  • Experience in developing and maintaining frontend components corresponding to the backend APIs
  • Familiar with containerized environments using technologies such as Docker and Kubernetes
  • Knowledge and/or experience in cloud platforms such as AWS or GCP is considered an asset
  • Appreciation of system performance and scalability
  • Basic knowledge of frontend technologies (HTML, Typescript, Angular or React) is considered an asset
  • Proficiency in English, both verbal and written

The Reasons To Join Our Team

  • Excellent remuneration package
  • Performance-based bonuses
  • Private health insurance
  • Card for Public Transportation
  • Multisport card
  • Corporate discounts
  • Parking – early bird option
  • 25 days of annual paid leave
  • Performance review process
  • Internal & external training programs
  • Team buildings & local company events
  • Work-life balance
  • Inspiring & supportive colleagues
  • Culture that encourages creativity & talent

If you are interested, please send us your CV.

All applications will be treated strictly confidential.

Only short-listed candidates will be contacted.

Thank you for applying!

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Senior Backend Developer

Danfoss

Sofiasenior

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Role description

The Impact You'll Make
Danfoss Group IT is seeking an
experienced developer
to forefront our integration initiatives and drive the continued improvement of our application portfolio in
Azure cloud.
In this pivotal role, you will be responsible for designing, developing, and deploying robust and scalable enterprise-level integrations.

You will be part of the Digital Customer Experience (DCE) team, with more than 125 international colleagues, where we develop, support, and lead the digital customer experience in Danfoss. We connect business needs and IT into digital solutions.

If you are passionate about building innovative solutions on Azure and have a proven track record of delivering high-quality results, we encourage you to apply with your cv in the English language.
The position is open in our locations in Slovenia, Croatia, Poland and Romania.
The job shall be hybrid.
What You’ll Be Doing

  • Design and implement event-driven integrations (Azure Event Grid and Azure Service Bus) and serverless functions following MACH principles.
  • Utilizing Azure CDN to serve assets and ensure the best possible user experience.
  • Develop and maintain Infrastructure as Code (IaC) solutions using Bicep.
  • Ensure adherence to Microsoft Azure security best practices and industry standards including access controls, data encryption, and vulnerability management.
  • Establish and maintain a robust CI/CD pipeline using Azure DevOps to automate the build, test, and deployment processes.

What We're Looking For

  • Proven professional experience in Azure integration technologies, including Azure Functions, Azure Event Grid, Azure Service Bus, and Azure API Management.
  • Strong proficiency in .NET development and C#.
  • Solid understanding of serverless architectures and cloud-native principles.
  • Expertise in Infrastructure as Code (IaC) using Bicep or Terraform.
  • Experience with CI/CD pipelines and tools like Azure DevOps.
  • Deep knowledge of security best practices and compliance standards.
  • Strong communication and collaboration abilities.
  • Proficiency in spoken and written English.

What You'll Get From Us

  • We promote from within and support your learning with mentoring, training, and access to global opportunities.
  • You’ll have flexibility, autonomy, and support to do your best work while maintaining a healthy work-life balance. Your well-being matters to us.
  • We strive to create an inclusive work environment where people of all backgrounds are respected, and valued for who they are.
  • Together with your employment we provide non salary benefits that we share with your during the recruitment process.

Ready to Make a Difference?
If this role excites you, we’d love to hear from you! Apply now to start the conversation and learn more about where your career can go with us.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or other protected category

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Integration Engineer (AWS)

wherewework Jobs

Sofia

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Role description

wherewework.bg от името на:

Technology & Software Employers in Bulgaria
Interested in Integration Engineer (AWS) jobs in Bulgaria? You're in the right place.

Integration and release engineering are increasingly important in Bulgaria in 2026 as delivery pipelines grow more automated and interconnected. Sofia holds most openings, and the roles are common in companies running complex, multi system environments. Employers span consultancies and product engineering teams.

To move forward, simply upload your CV to wherewework, and we'll help connect you with real Integration Engineer (AWS) openings from real companies, including the position you're viewing right now.

Here's how it works:

  • Upload your CV once. Click "Apply" in this window. It only takes a moment, and allows us to match your profile with relevant Integration Engineer (AWS) opportunities.
  • We match you with real roles that fit your experience. When companies open Integration Engineer (AWS) positions aligned with your skills, we'll identify the best opportunities for you.
  • You stay fully in control. Before your CV is ever shared, we'll notify you with the exact job title and company name, and ask for your confirmation.
  • Only confirmed applications are sent to employers. Once you approve, the employer receives your application and may contact you directly.

For Integration Engineer (AWS) roles in Sofia, salaries typically range from 2,500 EUR to 4,000 EUR gross per month, with an average gross salary of around 3,250 EUR. Automation across CI and CD pipelines and experience integrating complex systems support the higher end.

While you're here, explore wherewework to discover what it's really like to work at Bulgaria's top technology companies, through interview experiences, employee reviews, and community feedback.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

180 more openings in this category and country

Full-Stack EngineerMWDN · Bulgaria

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