Jobs Backend

Middle Backend Software Engineer

26 Lines Of Code  is looking for an independent Middle Backend Software Engineer who is ready to take real ownership of complex backend development — including scalable microservices, cloud infrastructure, and robust enterprise security integrations.

This role is not for a simple task-executor. We expect an engineer who can make architectural decisions, optimize system performance, and keep the backend moving forward without constant supervision.

Responsibilities:

• Own backend delivery end-to-end: design, develop, and maintain high-performance Python applications.
• Build and scale: design microservices-based system architectures and robust REST APIs.
• Manage infrastructure: containerize applications using Docker and manage deployments in Kubernetes via Helm charts.
• Leverage AWS cloud services: utilize DynamoDB, IAM, Lambda, and API Gateway effectively.
• Implement security integrations: design and support Splunk solutions (Secure Gateway, Spacebridge) and build secure SSO/MFA authentication flows (SAML 2.0, Duo).
• Collaborate efficiently: work closely with frontend engineers (React) and DevOps teams to ensure smooth integration and delivery.

• Maintain data performance: utilize Redis for caching layers, session storage, and highly available setups.

   

Requirements:

• 3+ years of professional backend development experience using Python 3.
• Proven experience with AWS (specifically DynamoDB, IAM, Lambda, and API Gateway).
• Strong proficiency in containerization and orchestration: Docker, Docker Compose, Kubernetes, and Helm.
• Solid experience with Redis for caching and session management.
• Hands-on experience with Splunk (Dashboard Studio/Classic, Secure Gateway, HEC).
• Deep understanding of enterprise security: SAML 2.0, SSO, Active Directory integration, and MFA policies.
• Working knowledge of React to effectively collaborate with frontend engineers.

• English — Upper-Intermediate+

   

Nice to have:

• Experience with Protocol Buffers (Protobuf) for efficient data serialization.
• Knowledge of WebSocket-based communication for real-time applications.
• Familiarity with Duo Network Gateway and secure enterprise network infrastructure (DMZ architectures).

• Experience with Cisco AnyConnect NVM or Endpoint Security Analytics.

   

🎁 What We Offer:

• Remote-friendly, full-time role with flexible working hours
• Supportive and professional team
• A modern work environment with opportunities for growth
• Involvement in large-scale and innovative outstaffing projects

Project description

This position is for a Backend Engineer specialized in secure, scalable backend architectures using AWS services, Python, AWS CDK (TypeScript/Python) or Terraform and CI/CD automation.

Responsibilities

Lead the design and development of secure, scalable backend systems and infrastructure using AWS services.

Architect and optimize ETL workflows for efficient ingestion, transformation, and storage of large datasets.

Own end-to-end technical delivery: system design, implementation, integration, code reviews, and performance tuning.

Collaborate with architects and domain experts to define backend and infrastructure architecture.

Implement and maintain AWS infrastructure using CDK, ensuring security, scalability, and cost efficiency.

Build robust monitoring, logging, and alerting for production systems to ensure reliability and traceability.

Work with analytics and product teams to transform business requirements into actionable backend and data solutions.

Drive best practices in code quality, CI/CD automation, containerization, and documentation.

Solve complex technical challenges with structured thinking and a data-driven approach.

Mentor engineers, conduct design reviews, and contribute to engineering excellence across teams.

Collaborate with cross-functional teams; follow Agile/Scrum workflows (tickets, sprints, reviews).

Skills

Must have

Proven experience designing and implementing secure, scalable backend architectures using AWS services (S3, Lambda, DynamoDB, ECS, EC2, etc.).

Strong proficiency in Python development and object-oriented design principles.

Hands-on experience with Infrastructure-as-Code tools such as AWS CDK (TypeScript/Python) or Terraform.

Deep understanding of Docker, containerized development, and microservice deployment patterns.

Expertise in building REST APIs, microservices, and event-driven architectures.

Advanced knowledge of relational and non-relational databases, schema design, and query optimization.

Experience designing ETL/ELT pipelines, data modeling, and implementing data quality frameworks.

Familiarity with workflow orchestration tools like Argo Workflows.

Strong capability in CI/CD automation, GitLab, testing frameworks, and enforcing code quality standards.

Ability to translate complex business requirements into scalable technical solutions.

Collaborative experience working with frontend, data, QA, and product teams in cross-functional environments.

Nice to have

Knowledge of EKS (Kubernetes) and container orchestration.

Experience with search engines (e.g., OpenSearch).

Designing ETL pipelines using Athena, OpenSearch, or Redshift.

Exposure to Snowflake, data warehouses, Parquet file processing, and schema evolution.

Familiarity with monitoring and observability tools (Grafana, Tableau, OpenSearch Dashboards).

Other

Languages

English: B2 Upper Intermediate

• Project Description:

  This position is for a Backend Engineer specialized in secure, scalable backend architectures using AWS services, Python, AWS CDK (TypeScript/Python) or Terraform and CI/CD automation.

   

• Responsibilities:

  • Lead the design and development of secure, scalable backend systems and infrastructure using AWS services.
  • Architect and optimize ETL workflows for efficient ingestion, transformation, and storage of large datasets.
  • Own end-to-end technical delivery: system design, implementation, integration, code reviews, and performance tuning.
  • Collaborate with architects and domain experts to define backend and infrastructure architecture.
  • Implement and maintain AWS infrastructure using CDK, ensuring security, scalability, and cost efficiency.
  • Build robust monitoring, logging, and alerting for production systems to ensure reliability and traceability.
  • Work with analytics and product teams to transform business requirements into actionable backend and data solutions.
  • Drive best practices in code quality, CI/CD automation, containerization, and documentation.
  • Solve complex technical challenges with structured thinking and a data-driven approach.
  • Mentor engineers, conduct design reviews, and contribute to engineering excellence across teams.
  • Collaborate with cross-functional teams; follow Agile/Scrum workflows (tickets, sprints, reviews).

   

• Mandatory Skills Description:

  • Proven experience designing and implementing secure, scalable backend architectures using AWS services (S3, Lambda, DynamoDB, ECS, EC2, etc.).
  • Strong proficiency in Python development and object-oriented design principles.
  • Hands-on experience with Infrastructure-as-Code tools such as AWS CDK (TypeScript/Python) or Terraform.
  • Deep understanding of Docker, containerized development, and microservice deployment patterns.
  • Expertise in building REST APIs, microservices, and event-driven architectures.
  • Advanced knowledge of relational and non-relational databases, schema design, and query optimization.
  • Experience designing ETL/ELT pipelines, data modeling, and implementing data quality frameworks.
  • Familiarity with workflow orchestration tools like Argo Workflows.
  • Strong capability in CI/CD automation, GitLab, testing frameworks, and enforcing code quality standards.
  • Ability to translate complex business requirements into scalable technical solutions.
  • Collaborative experience working with frontend, data, QA, and product teams in cross-functional environments.

   

• Nice-to-Have Skills Description:

  • Knowledge of EKS (Kubernetes) and container orchestration.
  • Experience with search engines (e.g., OpenSearch).
  • Designing ETL pipelines using Athena, OpenSearch, or Redshift.
  • Exposure to Snowflake, data warehouses, Parquet file processing, and schema evolution.
  • Familiarity with monitoring and observability tools (Grafana, Tableau, OpenSearch Dashboards).

   

• Languages:
  • English: B2 Upper Intermediate

This position is for a Backend Engineer specialized in secure, scalable backend architectures using AWS services, Python, AWS CDK (TypeScript/Python) or Terraform and CI/CD automation.

• Responsibilities:

  • Lead the design and development of secure, scalable backend systems and infrastructure using AWS services.
  • Architect and optimize ETL workflows for efficient ingestion, transformation, and storage of large datasets.
  • Own end-to-end technical delivery: system design, implementation, integration, code reviews, and performance tuning.
  • Collaborate with architects and domain experts to define backend and infrastructure architecture.
  • Implement and maintain AWS infrastructure using CDK, ensuring security, scalability, and cost efficiency.
  • Build robust monitoring, logging, and alerting for production systems to ensure reliability and traceability.
  • Work with analytics and product teams to transform business requirements into actionable backend and data solutions.
  • Drive best practices in code quality, CI/CD automation, containerization, and documentation.
  • Solve complex technical challenges with structured thinking and a data-driven approach.
  • Mentor engineers, conduct design reviews, and contribute to engineering excellence across teams.
  • Collaborate with cross-functional teams; follow Agile/Scrum workflows (tickets, sprints, reviews).

• Mandatory Skills Description:

  • Proven experience designing and implementing secure, scalable backend architectures using AWS services (S3, Lambda, DynamoDB, ECS, EC2, etc.).
  • Strong proficiency in Python development and object-oriented design principles.
  • Hands-on experience with Infrastructure-as-Code tools such as AWS CDK (TypeScript/Python) or Terraform.
  • Deep understanding of Docker, containerized development, and microservice deployment patterns.
  • Expertise in building REST APIs, microservices, and event-driven architectures.
  • Advanced knowledge of relational and non-relational databases, schema design, and query optimization.
  • Experience designing ETL/ELT pipelines, data modeling, and implementing data quality frameworks.
  • Familiarity with workflow orchestration tools like Argo Workflows.
  • Strong capability in CI/CD automation, GitLab, testing frameworks, and enforcing code quality standards.
  • Ability to translate complex business requirements into scalable technical solutions.
  • Collaborative experience working with frontend, data, QA, and product teams in cross-functional environments.

Numerical Technologies LTD is a leading provider of custom software solutions and services specializing in risk, limits, and regulatory capital systems. We are currently looking for a Senior Python Developer to join our team.

Project: Development of a Market Risk platform for a global financial institution, supporting risk analytics, market data processing, and large-scale financial applications. 

What will you be doing?
You will design and build risk calculations for Hypothetical P&L, Risk-Theoretical P&L, and Historical VaR — owning the full HVaR pipeline end-to-end, and architecting calculation components for the upcoming Expected Shortfall extension. Along the way, you will optimise compute-intensive batch and intraday workloads, own quality through automated testing and reconciliation frameworks, and collaborate closely with quant developers and the Historical Data Store team.

What are we looking for?

• Programming: Expert-level in at least one of Python, C++, or Java/Scala, with strong Python regardless (the analytics ecosystem is Python-centric).
• Distributed/large-scale compute: Experience building or operating high-throughput calculation platforms — grid computing, Spark/Dask/Ray, or in-house distributed batch frameworks; profiling and optimising numerical workloads.
• Risk domain: Working knowledge of market risk measures — VaR (historical simulation in particular), P&L vectors, scenario shocks (absolute/relative/log returns), aggregation and netting.
• Data engineering fundamentals: Handling large time-series and position datasets efficiently (columnar formats, partitioning, memory management).
• Engineering practice: CI/CD, automated testing of numerical code (tolerance-based comparison, golden datasets), code review culture.

Nice to have: 

• Experience with HPL/RTPL production and PLA testing.
• Numerical computing depth: numpy/scipy internals, vectorisation, GPU acceleration.
• Experience integrating with quant pricing libraries via C++/Python bindings.

What we offer:

• Competitive compensation depending on experience and skills.
• Regular assessments and salary reviews.
• Paid personal days.
• Mental health support program.
• Language classes.
• Flexible working schedule.

We are looking for a Python Engineer with experience in Machine Learning and Large Language Models to join a short-term project focused on building an intelligent data matching solution.

The project involves developing a reusable tool that automatically matches parent and child records between Excel/CSV datasets using a combination of rule-based logic, semantic search, and AI-assisted approaches. The solution should be configurable, scalable, and capable of handling new datasets without changes to the core business logic.

Project details:
Engagement: Full-time for approximately 2 weeks, followed by several iterations of improvements based on client feedback (with a possibility to continue in the next project phase).
Start date: ASAP.

Responsibilities:

• Develop a reusable Python-based tool for parent-child matching between Excel/CSV datasets.
• Design configurable data processing pipelines that can be executed locally on the client's environment.
• Implement text, code, numeric value, unit, and attribute normalization.
• Build candidate retrieval using exact matching, fuzzy matching, and multilingual semantic search.
• Develop confidence scoring and validation logic to avoid incorrect matches based solely on textual similarity.
• Generate structured output (CSV/XLSX) including match confidence, status, and explanation.
• Participate in several improvement iterations based on results from previously unseen client datasets.

• Communicate with the client regarding edge cases and continuously improve the matching quality.

   

  Requirements:

• Strong commercial experience with Python.
• Experience building Machine Learning or NLP solutions.
• Hands-on experience working with LLMs.
• Experience with semantic search, embeddings, or retrieval systems.
• Familiarity with fuzzy matching techniques and text preprocessing.
• Experience working with structured datasets (CSV, Excel, pandas).
• Ability to design configurable, reusable software rather than one-off scripts.
• Strong analytical and problem-solving skills.
• Good English level for communication.
  
  Nice to have:
• Experience with multilingual NLP.
• Knowledge of vector databases or embedding-based retrieval.
• Experience integrating AI services as fallback mechanisms.
• Experience designing configurable CLI/data-processing tools.
  
  What we offer:
• Short-term, high-impact AI/ML project with the possibility of extension.
• Flexible remote collaboration.
• Opportunity to work on an interesting real-world data matching problem combining ML, LLMs, and traditional search techniques.
• Direct communication with the client and the ability to influence the final solution.
• Competitive hourly compensation based on your experience.

We’re building a high-load P2P payment system already in production, processing thousands of transactions daily.
Now we’re looking for a Senior Software Engineer to help us scale, optimize performance, and reach our next milestone with 99.99% SLA.

💻 Tech Stack:

Backend: PHP 8.1, Laravel 10, MySQL 8.0, RabbitMQ, Redis, Hexagonal Architecture
Frontend: Laravel Livewire (+ Vue.js / React.js for checkouts)
Infrastructure: Docker, Bitbucket, Laravel Envoyer, Google Cloud
Tools: Jira, Confluence, Postman

💼 What you’ll do:

• Improve system scalability, stability, and security
• Design and optimize architecture & data flows
• Develop new features and enhance existing APIs
• Identify bottlenecks and optimize performance
• Implement and maintain testing processes
• Support production systems and ensure reliability
• Contribute to technical documentation

🔥 Requirements:

✔ Strong PHP (OOP) expertise
✔ Deep knowledge of Laravel / Symfony
✔ Solid experience with MySQL (indexes, transactions, ACID)
✔ Experience with testing (unit, integration)
✔ Understanding of security (SQL injection, XSS, CSRF, etc.)
✔ Experience with Docker, CI/CD basics
✔ Knowledge of SOLID, design patterns, DDD basics
✔ Understanding of microservices & system architecture
✔ Agile (Scrum/Kanban) experience
✔ Basic frontend skills (Vue.js / React.js)

⭐️ Nice to have:

• Google Cloud / Kubernetes
• Experience with RabbitMQ / queues
• DDD / Hexagonal Architecture
• CI/CD pipelines (Bitbucket / GitLab)

NuxGame is a dynamic IT company delivering top-tier software solutions for the iGaming industry. We empower operators of all sizes to expand into new markets, strengthen their existing brands, and achieve ambitious business goals.

We are looking for a Team Lead (Backend Department) to join our team. If you are passionate about high-load systems, solving complex engineering challenges, and working with modern tech stacks, this is the place for you.

What will be your responsibilities:

• Manage and mentor a team of PHP developers, fostering a collaborative and productive work environment;
• Lead the development of new features through cross-team collaboration, applying best development practices and ensuring high code quality;
• Establish and maintain processes for profiling and monitoring enterprise applications to ensure optimal performance;
• Participate in the migration of monolithic applications to a microservices architecture, ensuring scalability across different regions;
• Collaborate closely with other teams to ensure seamless integration of PHP applications with other systems and technologies.
   

What we expect from you:

• At least 4 years of PHP development experience with a deep understanding of the Laravel framework;
• Proven leadership experience with the ability to manage and develop a team of engineers;
• Strong experience with cloud environments, preferably AWS;
• Solid knowledge of microservices architecture, Docker, Kubernetes, Jenkins, SQL tuning and optimization;
• Good understanding of HTTP, REST, WebSocket, API integrations, as well as experience with PostgreSQL, analytical databases, and BI tools;
• Basic knowledge of Linux and Nginx.
   

What we offer:

We believe that a happy team builds the best products. Here is how we support you:

• Remote & Flexible: Work from anywhere. Our core hours are 09:00/10:00 to 17:00/18:00 (Kyiv time), Monday to Friday.
• Financial Stability: Timely compensation payments.
• Personal Equipment Policy: We provide equipment to ensure comfortable and efficient work.
• Knowledge Sharing: We regularly gather to discuss new trends, share insights, and grow together.
• Community: At NuxGame, you will work in a team of like-minded professionals ready to support, inspire, and tackle complex challenges together.
• Creative Freedom: We encourage initiative. With us, you have the freedom of professional expression and space to implement your ideas.
• Time-off Policy: Up to 29 days off per year, including up to 5 days for health-related absence (without medical confirmation).
• Atmosphere: A friendly environment focused on results and mutual respect, free from unnecessary bureaucracy and pressure.
   

We believe in unlocking the inner potential of each team member within an open and democratic culture.

We look forward to welcoming you to our team!

Responsibilities:

- Technical leadership of squad delivery (3 Senior PHP Laravel developers, DevOps, QA)

- Collaboration with the Engineering Principal / Transformation Lead

- Planning, estimation, code review, and quality oversight

- Maturing the team's ways of working

- Architectural decisions for the Transformation Squad

- Mentoring team members

- Reporting status and risks

Requirements:

- 5+ years of commercial PHP/Laravel development experience, including 2+ years as a Tech Lead/Team Lead

- Strong PHP/Laravel/MySQL knowledge

- Experience leading a team of 4-6 people

- Code review experience

- Understanding of CI/CD and GCP

- Confident English (B2+)

Nice to have:

- Monolith-to-microservice migration experience

- Couchbase/Redis/MongoDB/RabbitMQ

- Outsourced/nearshore experience with UK/EU clients

- E-commerce/marketplace experience

- GCP certifications

Our Customer:

Our client is a fast-growing tech company that builds innovative web solutions. They are looking for a talented Backend Developer to design and deliver impactful features, contribute to new services, and help advance their platform. The team values collaboration, learning, and continuous innovation.
 

Your Tasks:

• Collaborate closely with the founding team and product managers.
• Ensure service availability and take part in on-call rotations.
• Drive innovation, continuously learn, and share knowledge with the team.

Required Experience and Skills:

• At least 5+ years of experience in server-side Java development.
• Strong hands-on experience with relational databases and SQL.
• Experience building and working with RESTful web services and APIs.
• Familiarity with Linux-based systems.
• Experience working in an Agile software development environment.
• Ability to write clean, reusable code, prioritizing readability over complexity.
• Self-driven and results-oriented, able to take ownership of tasks and see them through to completion.
• Comfortable working in a fast-paced environment.
• BSc in Computer Science or equivalent practical experience.
• English proficiency at Upper-Intermediate level or higher.

Would Be a Plus:

• Experience designing and implementing microservices architectures.
• Experience scaling applications and building highly available systems.
• Experience with caching solutions such as Memcached, Redis, or similar technologies.
• Experience with messaging systems such as RabbitMQ or equivalent.
• Experience with non-blocking and reactive web frameworks such as RxJava or Spring WebFlux.
• Experience with distributed streaming and processing platforms such as Kafka or Spark.
• Experience with parser generators such as ANTLR, JavaCC, or similar tools.

Requirements:
 

Commercial experience in Gambling / iGaming is required
Commercial GameDev experience is required (preferably slot games)
 

• 3+ years of experience in Java
• English — Upper-Intermediate (B2)
• Experience in math processing
• Experience with slot games
• Structured and analytical thinking
• Strong elaboration and communication skills
• Hands-on experience with AI tools as part of everyday work is a must

Strong knowledge of:

• Core Java, Collections, Streams, Lambdas
• Exception handling, Immutability, records
• Clean Code principles
• Spring Boot, Spring MVC (REST APIs), Spring Security (JWT)
• SQL, JPA
• JWT

Responsibilities:
 

• Development and support of backend services
• Participation in feature development and system improvements
• Close collaboration with game teams, QA, and product

Nice to have:
 

• JVM basics (heap/stack, GC, memory model)
• SOLID
• Spring MVC (filters, interceptors)
• Spring Security (filters, auth flow)
• Dependency Injection & IoC
• Validation (Bean Validation)
• API design (REST principles, versioning, error handling)
• Java concurrency fundamentals (basic understanding)
• Databases & Persistence: Transactions, Indexing basics, Hibernate
• Security: Secure coding practices, SQL injection prevention, OAuth2
• Testing: JUnit 5, Mockito, Integration testing basics
• DevOps & Tooling: Docker (basics, build/run), Git (branching, rebase), Maven / Gradle

About Us

At UITOP, we design and develop scalable B2B SaaS platforms across industries like logistics, finance, construction, and so on.

Job Summary
The role focuses on backend development, building and optimizing systems, and integrating AI features to enhance the platform. The position also requires familiarity with DevOps practices to support deployment, monitoring, and scalable operations.

What do you have

• At least 4 years of experience with Ruby on Rails, with 3–4 years of professional backend development.
• Strong backend skills in Ruby and Rails (most important).
• Frontend experience with Vanilla JavaScript, Hotwire, StimulusJS, Turbo, TailwindCSS.
• Knowledge of data stores: Postgres, Redis; background job processing with Sidekiq; object storage with S3.
• Experience with cloud environments (AWS, GCP, or Azure), Terraform, networking, and security concepts.
• DevOps skills: CI/CD pipeline setup and maintenance, automated deployments, containerization (Docker), orchestration (Kubernetes), monitoring and logging, and performance optimization for production workloads.
• Good English communication skills (B2 level), ready to collaborate effectively in English.

About project
The platform helps cities, developers, and urban planners automate and simplify the permit approval process, reducing errors and speeding up approvals with AI.

What we have

• Regular performance and salary reviews. 
• Working with complex large-scale SaaS projects, from 6 months.
• 18 working days of vacation and 10 sick days.
• Compensation 50% for professional development cources. 
• Free Internal English classes.
• Company equipment. We’ll provide a laptop after 6 months of work. 
• Financial compensation of coworking 100% (during blackouts).
• Flexible work schedule, remote.

Our focus is on a result-oriented person, ready to learn and implement new technologies. Maybe you are our match, let's talk!

Job Description

Primary Backend Skills:
Framework: Deep expertise in the .NET 8 Framework, specifically for building Web APIs.
Data Access: Proficiency with Entity Framework for ORM.
Testing: Skills in writing unit tests for backend services using XUnit, NUnnit.
API Documentation: Experience using Swashbuckle to generate and maintain Swagger documentation.

Primary Frontend Skils:
Framework: Expertise in the Angular 14, 16, 18; Angular Material UI
Nice-to-have: Experience with RxJs

Preferred, Not Required Skills
Version Control: Proficiency with Git and GitLab.
Collaboration: Experience working with Jira and Confluence.

Job Responsibilities

Working in Scrum team and perform function of senior software developer doing software modules architecture, design, development, unit and integration testing and deployment.

Department/Project Description

Partner is one of the leaders in design, development and manufacturing data communications equipment for the industrial Internet of Things — connecting physical assets to business processes to deliver enhanced value.

Developing cloud-based platform hosted on Azure using .NET tech stack. The platform interacts with different corporate services in order to support business processes across company in manufacturing, engineering, sales, shipping, etc.

Skill Category

.NET

Keyskills - Must Have

• .NET
• Entity Framework
• MS SQL Server
• ReactJS
• AngularJS
• Azure

Workload: Full-time
Duration: Long-term
Location: EU
Rate: Up to 20 USD/hour

About the Role

We are looking for a Senior Backend Engineer with strong expertise in Python and Splunk to join a long-term international project. You will be responsible for developing secure, scalable backend services while working on enterprise-grade integrations involving Splunk, AWS, Kubernetes, and modern cloud infrastructure.

This role is ideal for engineers with a strong background in backend development, cloud-native applications, and security-focused enterprise environments.

Responsibilities

• Design, develop, and maintain scalable backend services using Python 3.
• Build and maintain RESTful APIs and microservices.
• Integrate backend systems with enterprise Splunk solutions and security platforms.
• Deploy and manage containerized applications using Docker, Kubernetes, and Helm.
• Develop cloud-native solutions using AWS services.
• Optimize application performance, scalability, and reliability.
• Collaborate with frontend engineers and cross-functional teams to deliver end-to-end solutions.
• Implement secure authentication and authorization mechanisms.
• Troubleshoot production issues and improve platform stability.
• Follow software engineering best practices, including code reviews, testing, and documentation.

Required Skills

• 3+ years of commercial backend engineering experience.
• Strong proficiency in Python 3.
• Experience designing and building RESTful APIs.
• Experience working with microservices architecture.
• Basic knowledge of React to collaborate effectively with frontend teams.
• Hands-on experience with AWS services, including:
  • DynamoDB
  • IAM
  • Lambda
  • API Gateway
• Strong experience with Redis for caching, session management, and high-availability deployments.
• Hands-on experience with Docker and Docker Compose.
• Experience with Kubernetes and container orchestration.
• Experience managing deployments with Helm.

Splunk Expertise

Candidates should have hands-on experience with:

• Splunk Secure Gateway
• Spacebridge
• Splunk Mobile deployment
• Dashboard Studio
• Classic Dashboards
• Secure Firewall App for Splunk
• FMC integration
• eStreamer Client Add-On
• Splunk Network Analytics (SNA)
• Splunk HTTP Event Collector (HEC)

Security & Identity

• Experience with SAML 2.0 and Single Sign-On (SSO).
• Experience integrating Identity Providers (IdPs).
• Active Directory attribute mapping and role/group configuration.
• Experience with Duo Single Sign-On and Two-Factor Authentication (2FA).
• Experience with AnyConnect Network Visibility Module.
• Experience with Endpoint Security Analytics.
• Strong understanding of enterprise network security, secure backend architecture, and data privacy principles.
• Bachelor's degree in Computer Science, Engineering, or a related field.

Nice to Have

• Experience with Protocol Buffers (Protobuf).
• Experience with WebSockets for real-time communication.
• Experience with Duo Network Gateway.
• Knowledge of DMZ architecture and secure network design.
• Experience working in enterprise cybersecurity environments.

What We Offer

• Long-term international project.
• Opportunity to work with modern cloud-native technologies and enterprise security platforms.
• Collaborative engineering environment.
• Competitive hourly rate based on experience.
• Exposure to complex backend architectures and security-focused infrastructure.

On behalf of our Client from Spain, Mobilunity is looking for a Backend Developer.

Our Client is building a new digital product focused on ticketing solutions for the entertainment industry. The platform enables users to easily discover, purchase, and manage tickets for various venues such as clubs, concerts, and other live events.

The product is designed to provide a seamless booking experience, allowing users to access events, manage reservations, and interact with venues in real time. At the same time, it empowers businesses to efficiently manage ticket sales, optimize attendance, and build direct relationships with their audience.

This is a greenfield project aimed at rebuilding the service from scratch using modern technologies and scalable architecture.

Their goal is to create a leading platform in the entertainment space, helping venues and event organizers deliver a smooth and engaging digital experience, while increasing customer loyalty and operational efficiency.
 

Requirements:

 Backend:
 

• Strong experience with PHP 8.2+ (typed properties, enums, readonly classes, attributes, fibers)
• Solid knowledge of Symfony 7 (Messenger, Doctrine ORM, DI Container, Security, Twig)
• Experience with MySQL / Doctrine DBAL, including complex queries, indexing, EXPLAIN, and transaction management
• Hands-on experience with Docker / Docker Compose
• Confident use of Git workflows (pull requests, code reviews)
   

Architecture & Engineering:
 

• Practical experience with DDD (bounded contexts, aggregates, value objects, domain events)
• Strong understanding of Hexagonal Architecture (Ports & Adapters)
• Experience with CQRS (commands, queries, handlers)
• Hands-on experience with event-driven architecture (async processing, event listeners)
• Solid understanding of SOLID principles and clean code practices
   

Frontend (basic knowledge):
 

• Basic experience with React and Next.js (ability to read and modify existing components)
• Working knowledge of TypeScript
• Familiarity with Zustand
• Ability to work with Tailwind CSS
• Experience with Twig
   

AI:
 

• Experience using AI coding assistants (e.g., Claude Code)
• AI-assisted code generation, testing, and documentation
• Ability to review and validate AI-generated output

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!