UI Designer Jobs in Bulgaria.
All active UI Designer roles based in Bulgaria.
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Senior Site Reliability Engineer (DevOps, Java)
Why Join Exadel
We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.
From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.
What powers it all? Our people are ambitious, collaborative, and constantly evolving.
About the Client
The company has been building solutions for mobile apps, effortless payment, business travel, and advertising since 1992. The customer is developing a mobility platform that allows operators to manage their vehicles and drivers efficiently, regulators to be informed and establish guidelines, service providers to deliver sustainable solutions, and riders to have an effortless transit experience.
Project Team
The project is a taxi ordering service and it contains the following components:
- Ride server (all data processing)
- Payment server (PCI DSS-compliant), which performs a transaction with the passenger's digital wallet and payment gateways
- Mobile application (hail taxi, geocoding, map, payments)
- Taxi terminal (3rd party)
The project integrates with 3rd party services, including PayPal, MasterPass, Stripe, and Twilio.
The team itself consists of 1 Team Lead, 1 UI Developers, 6 Back-End Developers, 9 Mobile Developers, 5 QA, 2 BA and 2 Designer.
What You’ll Do
- Design, build, and operate reliable, scalable distributed systems
- Improve system availability, performance, and resilience
- Automate infrastructure, deployments, and operational processes
- Diagnose and resolve production issues
- Lead upgrades and migrations with minimal or zero downtime
- Participate in on-call rotations and incident response
- Collaborate closely with development teams to improve operability
- Drive best practices around monitoring, alerting, and capacity planning
- Reduce operational toil through automation
- Contribute to incident management, post-mortems, disaster recovery strategies, and continuous reliability improvements
What You Bring
- 7+ years of experience, specializing in Kubernetes and AWS
- Strong programming skills in Java, with willingness to learn Ruby
- Solid understanding of concurrency, runtime behavior, and performance optimization
- Hands-on experience with Docker and containerized workloads
- Strong Kubernetes expertise (Deployments, StatefulSets, Services, Ingress, Helm, troubleshooting, autoscaling)
- Strong AWS experience (EC2, EKS, RDS, S3, IAM, VPC, Load Balancers, CloudWatch)
- Experience designing infrastructure for high availability and disaster recovery
- Experience with CI/CD pipelines and Infrastructure as Code (Terraform, CloudFormation, Pulumi, or similar
- Experience with RabbitMQ or similar messaging systems (Kafka, SQS, Pulsar, etc.
- Strong understanding of relational databases (MySQL/PostgreSQL), including query optimization, replication, and failover strategies
- Familiarity with NoSQL and in-memory databases (Redis, DynamoDB, MongoDB)
- Experience with distributed systems, microservices, capacity planning, and fault tolerance
- Experience with monitoring and observability tools (Prometheus, Grafana, Datadog, ELK/OpenSearch, OpenTelemetry)
- Strong understanding of Linux systems and networking fundamentals (TCP/IP, DNS, HTTP/HTTPS, TLS, load balancing)
- Experience with SRE practices, including SLOs/SLIs/SLAs, load testing, resilience testing, and incident management
- Strong communication skills and ability to collaborate across engineering teams
- Calm and effective during incidents with an ownership mindset
Nice to Have
- Experience operating production systems written in Ruby, Java, or other major platforms
- Framework experience such as Ruby on Rails, Spring Boot, or similar
- Experience operating high-traffic SaaS platforms
- Cost optimization in cloud environments
- Chaos engineering practices
- Experience mentoring junior engineers
English level
Upper-Intermediate
Legal & Hiring Information
- Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more
- Reasonable accommodations are available to enable individuals with disabilities to perform essential functions
- Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs
Your Benefits at Exadel
Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details.
- International projects
- In-office, hybrid, or remote flexibility
- Medical healthcare
- Recognition program
- Ongoing learning & reimbursement
- Well-being program
- Team events & local benefits
- Sports compensation
- Referral bonuses
- Top-tier equipment provision
Exadel Culture
We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.
Ready to apply?
Apply to Exadel Inc (Website)
Senior Site Reliability Engineer (DevOps, Java)
Why Join Exadel
We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.
From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.
What powers it all? Our people are ambitious, collaborative, and constantly evolving.
About the Client
The company has been building solutions for mobile apps, effortless payment, business travel, and advertising since 1992. The customer is developing a mobility platform that allows operators to manage their vehicles and drivers efficiently, regulators to be informed and establish guidelines, service providers to deliver sustainable solutions, and riders to have an effortless transit experience.
Project Team
The project is a taxi ordering service and it contains the following components:
- Ride server (all data processing)
- Payment server (PCI DSS-compliant), which performs a transaction with the passenger's digital wallet and payment gateways
- Mobile application (hail taxi, geocoding, map, payments)
- Taxi terminal (3rd party)
The project integrates with 3rd party services, including PayPal, MasterPass, Stripe, and Twilio.
The team itself consists of 1 Team Lead, 1 UI Developers, 6 Back-End Developers, 9 Mobile Developers, 5 QA, 2 BA and 2 Designer.
What You’ll Do
- Design, build, and operate reliable, scalable distributed systems
- Improve system availability, performance, and resilience
- Automate infrastructure, deployments, and operational processes
- Diagnose and resolve production issues
- Lead upgrades and migrations with minimal or zero downtime
- Participate in on-call rotations and incident response
- Collaborate closely with development teams to improve operability
- Drive best practices around monitoring, alerting, and capacity planning
- Reduce operational toil through automation
- Contribute to incident management, post-mortems, disaster recovery strategies, and continuous reliability improvements
What You Bring
- 7+ years of experience, specializing in Kubernetes and AWS
- Strong programming skills in Java, with willingness to learn Ruby
- Solid understanding of concurrency, runtime behavior, and performance optimization
- Hands-on experience with Docker and containerized workloads
- Strong Kubernetes expertise (Deployments, StatefulSets, Services, Ingress, Helm, troubleshooting, autoscaling)
- Strong AWS experience (EC2, EKS, RDS, S3, IAM, VPC, Load Balancers, CloudWatch)
- Experience designing infrastructure for high availability and disaster recovery
- Experience with CI/CD pipelines and Infrastructure as Code (Terraform, CloudFormation, Pulumi, or similar
- Experience with RabbitMQ or similar messaging systems (Kafka, SQS, Pulsar, etc.
- Strong understanding of relational databases (MySQL/PostgreSQL), including query optimization, replication, and failover strategies
- Familiarity with NoSQL and in-memory databases (Redis, DynamoDB, MongoDB)
- Experience with distributed systems, microservices, capacity planning, and fault tolerance
- Experience with monitoring and observability tools (Prometheus, Grafana, Datadog, ELK/OpenSearch, OpenTelemetry)
- Strong understanding of Linux systems and networking fundamentals (TCP/IP, DNS, HTTP/HTTPS, TLS, load balancing)
- Experience with SRE practices, including SLOs/SLIs/SLAs, load testing, resilience testing, and incident management
- Strong communication skills and ability to collaborate across engineering teams
- Calm and effective during incidents with an ownership mindset
Nice to Have
- Experience operating production systems written in Ruby, Java, or other major platforms
- Framework experience such as Ruby on Rails, Spring Boot, or similar
- Experience operating high-traffic SaaS platforms
- Cost optimization in cloud environments
- Chaos engineering practices
- Experience mentoring junior engineers
English level
Upper-Intermediate
Legal & Hiring Information
- Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more
- Reasonable accommodations are available to enable individuals with disabilities to perform essential functions
- Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs
Your Benefits at Exadel
Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details.
- International projects
- In-office, hybrid, or remote flexibility
- Medical healthcare
- Recognition program
- Ongoing learning & reimbursement
- Well-being program
- Team events & local benefits
- Sports compensation
- Referral bonuses
- Top-tier equipment provision
Exadel Culture
We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.
Ready to apply?
Apply to Exadel
Senior Site Reliability Engineer (DevOps, Java)
Why Join Exadel
We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.
From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.
What powers it all? Our people are ambitious, collaborative, and constantly evolving.
About the Client
The company has been building solutions for mobile apps, effortless payment, business travel, and advertising since 1992. The customer is developing a mobility platform that allows operators to manage their vehicles and drivers efficiently, regulators to be informed and establish guidelines, service providers to deliver sustainable solutions, and riders to have an effortless transit experience.
Project Team
The project is a taxi ordering service and it contains the following components:
- Ride server (all data processing)
- Payment server (PCI DSS-compliant), which performs a transaction with the passenger's digital wallet and payment gateways
- Mobile application (hail taxi, geocoding, map, payments)
- Taxi terminal (3rd party)
The project integrates with 3rd party services, including PayPal, MasterPass, Stripe, and Twilio.
The team itself consists of 1 Team Lead, 1 UI Developers, 6 Back-End Developers, 9 Mobile Developers, 5 QA, 2 BA and 2 Designer.
What You’ll Do
- Design, build, and operate reliable, scalable distributed systems
- Improve system availability, performance, and resilience
- Automate infrastructure, deployments, and operational processes
- Diagnose and resolve production issues
- Lead upgrades and migrations with minimal or zero downtime
- Participate in on-call rotations and incident response
- Collaborate closely with development teams to improve operability
- Drive best practices around monitoring, alerting, and capacity planning
- Reduce operational toil through automation
- Contribute to incident management, post-mortems, disaster recovery strategies, and continuous reliability improvements
What You Bring
- 7+ years of experience, specializing in Kubernetes and AWS
- Strong programming skills in Java, with willingness to learn Ruby
- Solid understanding of concurrency, runtime behavior, and performance optimization
- Hands-on experience with Docker and containerized workloads
- Strong Kubernetes expertise (Deployments, StatefulSets, Services, Ingress, Helm, troubleshooting, autoscaling)
- Strong AWS experience (EC2, EKS, RDS, S3, IAM, VPC, Load Balancers, CloudWatch)
- Experience designing infrastructure for high availability and disaster recovery
- Experience with CI/CD pipelines and Infrastructure as Code (Terraform, CloudFormation, Pulumi, or similar
- Experience with RabbitMQ or similar messaging systems (Kafka, SQS, Pulsar, etc.
- Strong understanding of relational databases (MySQL/PostgreSQL), including query optimization, replication, and failover strategies
- Familiarity with NoSQL and in-memory databases (Redis, DynamoDB, MongoDB)
- Experience with distributed systems, microservices, capacity planning, and fault tolerance
- Experience with monitoring and observability tools (Prometheus, Grafana, Datadog, ELK/OpenSearch, OpenTelemetry)
- Strong understanding of Linux systems and networking fundamentals (TCP/IP, DNS, HTTP/HTTPS, TLS, load balancing)
- Experience with SRE practices, including SLOs/SLIs/SLAs, load testing, resilience testing, and incident management
- Strong communication skills and ability to collaborate across engineering teams
- Calm and effective during incidents with an ownership mindset
Nice to Have
- Experience operating production systems written in Ruby, Java, or other major platforms
- Framework experience such as Ruby on Rails, Spring Boot, or similar
- Experience operating high-traffic SaaS platforms
- Cost optimization in cloud environments
- Chaos engineering practices
- Experience mentoring junior engineers
English level
Upper-Intermediate
Legal & Hiring Information
- Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more
- Reasonable accommodations are available to enable individuals with disabilities to perform essential functions
- Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs
Your Benefits at Exadel
Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details.
- International projects
- In-office, hybrid, or remote flexibility
- Medical healthcare
- Recognition program
- Ongoing learning & reimbursement
- Well-being program
- Team events & local benefits
- Sports compensation
- Referral bonuses
- Top-tier equipment provision
Exadel Culture
We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.
Ready to apply?
Apply to Exadel
About Us:
Delasport is where technology meets the excitement of sports and gaming! As a leading powerhouse in iGaming software, we provide everything from platform development to player account management. Our platform is designed to make every player feel like the star of the show, with personalized experiences and cutting-edge technology at its heart.
Since our founding in 2010, we have won multiple international awards and have established a proven track record of excellence, stability, and overall success. This achievement only drives us to reach even greater heights. Currently, we are proud to have over 500 experts across various business fields and several offices in Bulgaria (Sofia and Plovdiv), Ukraine, and Malta.
Your Role:
The Product Launch team is built for people who don’t just maintain systems but create them. We take products from zero to hero, and scale them until they’re strong enough to be handed over to core teams. No legacy constraints. No endless support cycles. Just greenfield builds, modern tech, and real ownership from day one.
We move fast, think lean, and execute with focus, one product at a time, full commitment, full impact. Every sprint matter, every decision ship value. This is not a support team. It’s a build-from-scratch engine for products that matter, because every hero needs a superhero.
We’re looking for a Product Designer to shape player journeys, design fast prototypes, validate ideas, and influence product direction from day one.
How You’ll Make an Impact:
- Define UX direction for brand‑new products and early‑stage features.
- Architect clear, conversion‑driven player flows across sportsbook and casino journeys.
- Create wireframes and prototypes for rapid validation and KPI‑driven decisions.
- Lead discovery: identify user friction, market gaps, and new product opportunities.
- Use data (funnels, heatmaps, behavior) to guide prioritization and iteration.
- Collaborate closely with Product, Engineering, QA, and Product Analysts.
- Design A/B test variants and optimize LTV, engagement, and conversion.
Who You Are:
- Senior‑level UX/UI Designer with 5+ years of experience in product design.
- Strong iGaming background and understanding of player psychology.
- Product‑driven UX mindset focused on outcomes, not aesthetics.
- Skilled in analyzing user behavior and proposing structural improvements.
- Fast, lean, iterative approach to prototyping and validation.
- Excellent communicator who thrives in cross‑functional environments.
What We Offer to Make You Smile:
We’re not just about work, we are about creating a great place to grow, connect, and enjoy the journey. Here’s what you can expect when you join us:
- Competitive Salary Package: We value your skills, dedication, and contributions
- Time Off: Enjoy 21+ days of annual paid leave so you can rest, recharge, and come back inspired
- Bonus & Rewards: Performance-based annual bonuses, special vouchers for birthdays and welcoming a newborn
- Health & Wellness: Additional Health insurance including dental care; Co-funding a Multisport/Coolfit card to help you stay active
- Extra Benefits: Employee discounts at various retailers and a monthly allowance for public transportation
- Great Office Locations: Central office location in Sofia and Plovdiv
- Relax & Recharge Zone: Take a break with colleagues in our PlayStation and Pool Area - perfect for recharging during the day
Wait, there’s more
- Happy Hour Fridays: Every Friday we host themed Happy Hours with snacks, fun activities, and plenty of opportunities to connect and unwind with colleagues
- Multicultural Days: Celebrate diversity and experience the traditions, food, and cultures of teammates from around the world
- Massages at the Office: Weekly Free Recreational Massages to help relax during the workday
- Chess Lessons: Sharpen your strategic thinking and enjoy some friendly competition with colleagues
- Sports & Football Team: We regularly participate in various sports events and have our own Delasport Football Team, competing in the IT League
- Bulgarian Language Lessons: Bulgarian for Foreigners classes to support smoother communication
- Office Library: Enjoy access to technical literature to expand your knowledge
Ready to Be Part of Something Big?
If you're excited to join a team that's revolutionizing the iGaming world and want to make a real impact, apply today. We can't wait to meet you!
#LI-HBRID
Ready to apply?
Apply to Delasport