Jobs Backend

About Us:

Entravel is a member’s club for discounted luxury travel and white-label hotel platform provider focusing on the crypto industry, backed by VCs and prominent European founders. Our hotel product is incredibly strong; we offer more than one million properties, and our rates are amongst the lowest in the world. In fact, on most 5* hotels you won’t find a platform with lower rates than Entravel.

What We’re Looking For:

We are actively seeking a talented and experienced Middle Backend Developer specializing in C# to join our dynamic team. As a key member of our development team, you will help architect and implement robust backend solutions that power our innovative hotel booking platform.

Core Skills:

• 3+ years of professional experience with C# and .NET Core (3.1–8).

• Strong understanding of asynchronous programming, LINQ, and dependency injection.

   

Databases:

• Proficiency with PostgreSQL (schema design, query optimization, migrations).
• Experience with MongoDB for document-oriented data models.
• Working knowledge of Redis for caching and distributed state management.

Messaging & Event Streaming:

• Hands-on experience with RabbitMQ for message queuing.
• Familiarity with Kafka for event-driven architectures and streaming data pipelines.

Monitoring & Observability:

• Experience integrating and using Kibana, Prometheus, and Grafana for logging, metrics, and alerting.

DevOps & Cloud:

• Strong understanding of Docker containerization and image optimization.
• Practical experience deploying and managing services on Google Cloud Platform (GCP) (e.g., GKE, Cloud Run, Pub/Sub, Cloud SQL).

General Engineering Practices:

• Deep knowledge of RESTful APIs and gRPC service design.
• Solid grasp of CI/CD pipelines and Git-based workflows.
• Commitment to clean architecture, unit testing, and code quality.

Soft Skills:

• Excellent problem-solving and analytical thinking abilities.
• Strong communication skills, able to collaborate effectively across teams in both English and Ukrainian.
• High sense of ownership, accountability, and responsibility for deliverables and system reliability.

We offer:

• Flexible Start: Set your own comfortable working hours that accommodate your individual needs.
• Competitive Salary: High standards of remuneration reflecting your contribution and skills.
• Vacation: Enjoy 22 days of vacation for full rejuvenation and life enjoyment.
• Sick Leave: Ensure your health with 15 days of sick leave per year.
• Special Leave Cases: Support for significant life events such as weddings, childbirth, or the loss of a close family member.

About Us:

Entravel is a member’s club for discounted luxury travel and white-label hotel platform provider focusing on the crypto industry, backed by VCs and prominent European founders. Our hotel product is incredibly strong; we offer more than one million properties, and our rates are amongst the lowest in the world. In fact, on most 5* hotels you won’t find a platform with lower rates than Entravel.

What We’re Looking For:

We are actively seeking a talented and experienced Senior Backend Developer specializing in C# to join our dynamic team. As a key member of our development team, you will help architect and implement robust backend solutions that power our innovative hotel booking platform.

Core Skills:

• 5+ years of professional experience with C# and .NET Core (3.1–8).
• Strong understanding of asynchronous programming, LINQ, and dependency injection.

• Proven experience building scalable, distributed systems and microservices.

   

Databases:

• Proficiency with PostgreSQL (schema design, query optimization, migrations).
• Experience with MongoDB for document-oriented data models.
• Working knowledge of Redis for caching and distributed state management.

Messaging & Event Streaming:

• Hands-on experience with RabbitMQ for message queuing.
• Familiarity with Kafka for event-driven architectures and streaming data pipelines.

Monitoring & Observability:

• Experience integrating and using Kibana, Prometheus, and Grafana for logging, metrics, and alerting.

DevOps & Cloud:

• Strong understanding of Docker containerization and image optimization.
• Practical experience deploying and managing services on Google Cloud Platform (GCP) (e.g., GKE, Cloud Run, Pub/Sub, Cloud SQL).

General Engineering Practices:

• Deep knowledge of RESTful APIs and gRPC service design.
• Solid grasp of CI/CD pipelines and Git-based workflows.
• Commitment to clean architecture, unit testing, and code quality.
• Ability to mentor engineers and contribute to architectural decisions.

Soft Skills:

• Excellent problem-solving and analytical thinking abilities.
• Strong communication skills, able to collaborate effectively across teams in both English and Ukrainian.
• High sense of ownership, accountability, and responsibility for deliverables and system reliability.

Nice to Have:

• Experience with IaC tools (Terraform, Pulumi).
• Knowledge of performance profiling and application security best practices.
• Familiarity with domain-driven design (DDD) and event sourcing.

We offer:

• Flexible Start: Set your own comfortable working hours that accommodate your individual needs.
• Competitive Salary: High standards of remuneration reflecting your contribution and skills.
• Vacation: Enjoy 22 days of vacation for full rejuvenation and life enjoyment.
• Sick Leave: Ensure your health with 15 days of sick leave per year.
• Special Leave Cases: Support for significant life events such as weddings, childbirth, or the loss of a close family member.

PLEASE NOTE that we are searching for candidates who are located in Lviv and are able to visit office in Lviv according to our policies.

About us:

EveryMatrix is a leading B2B SaaS provider delivering iGaming software, content and services. We provide casino, sports betting, platform and payments, and affiliate management to 200 customers worldwide.

But that's not all! We're not just about numbers, we're about people. With a team of over 1000 passionate individuals spread across twelve countries in Europe, Asia, and the US, we're all united by our love for innovation and teamwork.

EveryMatrix is a member of the World Lottery Association (WLA) and European Lotteries Association. In September 2023 it became the first iGaming supplier to receive WLA Safer Gambling Certification. EveryMatrix is proud of its commitment to safer gambling and player protection whilst producing market leading gaming solutions.

Join us on this exciting journey as we continue to redefine the iGaming landscape, one groundbreaking solution at a time.
 

We are looking for a passionate and dedicated Strong Middle .Net Developer to join our team in Lviv!
 

What You'll get to do:

• Hands-on development and integration of the evolving business functionality on the platform; 
• Understand business requirements and their mapping to the given software framework; 
• Discuss business requirements along with the team leader, business analysts, project managers, and other parties involved; 
• Follow the project's design guidelines and agile methodology; 
• Work in a test-driven, object-oriented environment; 
• Participate in the design and implementation of the new architecture of the next-generation platform; 
• Offer QA and support assistance whenever issues arise.

What You need to know:

• 4+ years of track record as a .Net developer; 
• Hands-on expertise in C#/.Net; 
• Knowledge of n-tier applications, distributed applications;
• Exposure to microservice-oriented architecture, parallel and asynchronous programming design patterns; 
• Experience with relational database systems (MSSQL Server, MySQL, PostgreSQL);
• Development experience with web services; 
• Ability to manage priorities, commitments, and tasks; 
• Analytical mindset; 
• English level: upper-intermediate or higher. 
   

Here's what we offer:

• Start with 22 days of annual leave, with 2 additional days added each year, up to 32 days by your fifth year with us.
• 3 sick leave days per year, no doctor's note required; 30 medical leave days with medical allowance
• Hybrid work schedule is available after the first three months of employment, with up to 50 days of work from home per year.
• Benefit from two Free Fridays each year, limited to one per quarter.
• Daily catered lunch or monthly lunch allowance. 
• Private Medical Subscription. 
• Access online learning platforms like Udemy for Business, LinkedIn Learning or O’Reilly, and a budget for external training.
• Gym allowance.
• Corporate English lessons
  
  Support for New Parents:
• 21 weeks of paid maternity leave, with the flexibility to work from home full-time until your child turns 1 year old.
• 4 weeks of paternity leave, plus the flexibility to work from home full-time until your child is 13 weeks old.

At EveryMatrix, we're committed to creating a supportive and inclusive workplace where you can thrive both personally and professionally. Come join us and experience the difference!
 

• The SEM product is embedded within the Geosciences Suite of Applications. This application has multiple views consisting of both 2D and 3D visualizations. The current data visualization is not sufficient for what we would like it to be. This role is expected to work with the lead and the product owner to understand the current shortcomings, investigate and research potential solutions, propose these solutions to the teams, and then work on the implementation of the agreed upon work. To get to this stage, the developers will also need to learn the inner workings of the visualization framework within Geoscience.

   

• Responsibilities:

  • Design, develop, and maintain graphics-intensive modules within the Geoscience platform using Java and OpenGL.
  • Implement advanced 2D and 3D visualization features for seismic, geological, and geospatial data.
  • Optimize rendering performance and ensure cross-platform compatibility, particularly in Linux environments.
  • Collaborate with geoscientists and software engineers to translate domain-specific requirements into technical solutions.
  • Participate in code reviews, testing, and documentation to maintain high-quality software standards.
  • Stay updated with the latest developments in graphics technologies and geoscience applications.

   

• Mandatory Skills Description:

  • Bachelor's or Master's degree in Computer Science, Geoscience, or a related field.
  • 5+ years of professional experience in Java OR C++ development with a focus on graphics programming.
  • Proficiency in OpenGL and related graphics libraries for rendering complex datasets.
  • Strong experience working in Linux environments, including shell scripting and system optimization.
  • Excellent problem-solving skills and the ability to work collaboratively in a multidisciplinary team.

   

• Nice-to-Have Skills Description:

  • Experience with geoscience software platforms.
  • Familiarity with geoscience data formats and visualization techniques.
  • Knowledge of additional programming languages such as Python, Java.
  • Understanding of GIS technologies and spatial data analysis.
  • Experience with agile development methodologies and version control systems like Git

   

• Languages:
  • English: B2 Upper Intermediate

😊 About us
 

ZentixSoft is a young British-Ukrainian full-cycle IT company. We are all about cool solutions and constant growth, and our main principle is People over processes. We are currently looking for a proactive Senior Node.js Developer with deep expertise in Telephony to join our team and build high-load communication systems.
 

📝 About the project & conditions

This is a long-term project focused on developing and scaling a robust telephony service. You will have a high degree of technical autonomy to build dialer systems and manage multi-region infrastructure.
 

• Format: Full-time,Outstaff
• Start date: ASAP.
• Duration: Long-term.
   

😉 What we expect from you

• 🔌 VoIP APIs: Strong experience with Telnyx, Twilio, etc., and building dialer systems.
• 📡 Protocols: Deep understanding of SIP protocol, SIP trunks, and WebRTC.
• 🛠 Telephony Tools: Hands-on experience with FreeSWITCH or Asterisk.
• 🗺 Architecture: Experience working with multi-region telephony systems.
• 💎 Stack: 4+ years with Node.js/TypeScript, Docker, and CI/CD.
• 🌍 English: Upper-Intermediate level for effective collaboration.
   

🌟 Would be a big plus

• 🛠️ Telecom Tools: Experience with FreeSWITCH or Asterisk.
• 🗺️ Global Scaling: Experience working with multi-region telephony systems and handling latency/routing issues.
• 🤖 Modern Workflow: Use of AI productivity tools (Cursor, ChatGPT, or Copilot) to speed up development.
   

✨ What awaits you at ZentixSoft

• 📈 Professional Growth. We create an individual development plan for your career path.
• 💵 Salary Review. A structured policy to ensure your compensation grows with your skills.
• 🎓 Knowledge Sharing. Access to general training, workshops, and internal sessions.
• 🤝 Corporate Culture. Full access to our culture and team activities.
• 🗣️ English. We fully cover classes with a teacher.
• ⚖️ Work-Life Balance. We work without overtime and respect your personal time.
• 💻 Tools. We cover the cost of all tools needed for work.
• 🦾 Trust. Zero micromanagement — only freedom in making technical decisions.
   

📩 If you feel like this is about you — send your CV, and if it's a match, we will get in touch soon!

Tecorian – Building the Future of Transportation Technology

We develop cutting-edge platforms and solutions for the transportation industry, powering everything from real-time fleet tracking to complete operational integration for the US market. You'll be working on a world-class product suite built with a best-in-class tech stack and an A+ engineering team. We don't just build software - we're building AI-native platforms, applying an AI-first approach across every layer of our technology.

We are looking for a Golang Engineer (Go Developer; BackEnd Developer (Go); Golang Developer; Backend Engineer) to design and optimize high-performance systems that keep global mobility moving.

As a key member of our engineering team, you'll own the delivery of scalable, production-grade services that operate under heavy load and demand absolute reliability. You'll drive architectural decisions, implement robust integrations with messaging and streaming platforms, and ensure that every API we ship is secure, efficient, and built for scale. Collaborating closely with product owners, front-end developers, and DevOps, you'll have the freedom to influence how features are shaped and the responsibility to see them through from concept to deployment. This is a role for an engineer (not just a coder) who thrives on solving complex technical challenges, optimizing for performance at scale, and delivering software that directly impacts hundreds of thousands of users in real time.

What We're Looking For

🛠 Technical Skills

• 4+ years of commercial Golang development experience in production systems
• Strong expertise in Kubernetes, Docker, and CI/CD pipelines
• Proficiency with gRPC and Kafka for high-performance service communication and event streaming
• Advanced database knowledge (PostgreSQL or Google Spanner) including schema design, indexing, and query optimization
• Experience with profiling and benchmarking Go applications (pprof or similar)
• Ability to design and implement complex automated processes such as cron jobs with dependencies, retries, and monitoring
• Skilled in writing clear API documentation and technical specifications

📈 Relevant Experience

• Designing and operating high-load, distributed architectures in production environments
• Delivering scalable microservices from concept to deployment
• Working in cross-functional teams to deliver mission-critical features
• Troubleshooting and optimizing systems in real-time, high-traffic environments
• Experience with ERP domain is considered a plus
• Proven motivation to grow as an engineer, with an interest in career development and continuous skill growth

🤝 Soft Skills

• Fluent English (written and spoken)
• Strong analytical and problem-solving mindset
• Collaborative, proactive, and detail-oriented approach
• Self-driven with a commitment to quality and continuous improvement

Test task for All Candidates 

test_task.md  (https://tinyurl.com/u5nz6z9x)

This is a required step that helps us assess your practical Go skills and problem-solving approach. Make sure to submit your results as part of your application with Github_URL. 

What We Offer

💰 Competitive compensation tailored to your skills and the impact you make. 

📄 Employment based on a B2B contract.

🏙️ Work model: Remote with relocation opportunities

🗓️ Work at your best - select from 9–6, 10–7, or 11–8 and keep your work-life balance in check. 

🏢 Brand-new office in Bucharest 

👨 Fully in-house engineering team - no outsourcing or outstaffing. 

🚄 Opportunity to work on high-impact, mission-critical projects for the US market from day one. 

🚀 Clear path for career growth and professional skill development, with opportunities to take ownership and expand responsibilities. 

🤝 Work alongside a world-class engineering team where knowledge sharing, mentorship, and continuous learning are the standard. 

🤖 Company-paid access to latest Claude Code for advanced AI-assisted development.

Be part of a team that's reshaping how transportation technology works - from concept to scale. Your code won't just run, it will move industries forward!

📧 Send your GitHub URLs with CV and weekly I review all links through challenge validator.

Please provide your CV and LinkedIn profile. We demand your LinkedIn profile with actual working experience to move forward with your application!

Fundomate is looking for a Senior Java Back-End Developer to join our team. Fundomate is an innovative fintech company operating in the alternative lending space and providing both direct-to-business and white-label turnkey solutions.

You will be good match if:

- You have history of solving non trivial problems in one of your previous projects

- You have wide technology background (backend, frontend, devops, ops, mobile development, etc), so you will understand the connections between technologies and expand this knowledge with domain and business needs. 

- You have experience working in US fintech domain 

We will be good match if:

- You want to solve (or learn to solve) complex business problems

- You want to experiment with processes/development technics/tools

- You are interested in continuous improvement and automation of product and working process

Requirements:

- 6+ years of experience developing web applications

- 3+ years of experience in any IoC & DI framework (Spring, Quarkus, Micronaut, etc.)

- TDD experience in production is a must have

- Experienced in pair programming

- Good knowledge of MicroServices (Kubernetes knowledge is a plus)

- Experience working with tools like Git, Gradle, Jenkins or similar CI/CD

- Working experience in Industry Standard protocols related API Security including OAuth (KeyCloak is a plus)

- Working experience with RDBMs like Postgres/MySQL or any similar

- Understanding of asynchronous message-based communication like Kafka, GCP Pub/Sub, AWS SNS/SQS, etc. (Kafka as an advantage)

- Strong Agile/Scrum/Kanban development experience

- Experience in third party systems integration (XML or JSON api)

- Knowledge of any cloud provider (AWS as an advantage)

Our technical Stack:

- Java 25

- Microservices (Quarkus)

- Postgresql/MySQL

- Kafka

- Keycloak

- Kubernetes & Docker

- AWS (EKS, MSK, RDS, etc.)

- Gradle

- Bitbucket pipelines, gitops approach

- Lombok, MapStruct, Flyway

We offer:

- Innovative product with modern technology stack

- Competitive salary (paid in $)

- Social package (paid vacations, sick leaves and etc)

- PE accounting and support

- WFH and remote working mode possibility, Ukrainian working hours

- No bureaucracy, micromanagement and time-tracking

About the project

Fintech project

Welcome bonus $1000 ❤️‍🔥

Requirements

• 5 + years of relevant experience in the IT industry, strong knowledge of including ECMAScript;
• 4 + years of experience with Node;
• Experience with NestJS;
• Experience with AWS;
• Experience with Aurora RDS;
• Experience with Serverless;
• Experience with NoSQL, PostgreSQL;
• Experience with Cognito;
• Experience with CI automation and test cases;
• English: Upper-intermediate.

Would be a plus

• Experience with Plaid integration;
• Experience with Google Cloud architecture.

What you will get

• Competitive compensation depending on experience and skills;
• English classes;
• Exciting and challenging projects all over the world on a long-term basis;
• Flexible working hours;
• Career development opportunity;
• Health/Sports Benefits;
• Informal and friendly atmosphere, a lack of bureaucracy and micromanagement;
• Paid vacation (18 working days) and 10 sick leaves;
• Unlimited work from home (remote) or in the office.

Immediate start!!!

Key Responsibilities

• Migration Projects (Primary Focus):

◦ Lead the migration of critical platforms from PHP 7 to PHP 8.x and from PHP 8.1 to PHP 8.1+

◦ Perform code audits to identify and fix breaking changes (typing, deprecations).

◦ Ensure zero downtime and functional continuity during upgrades.

• Technical Support & Debugging:

◦ Investigate and resolve critical bugs

◦ Manage technical clarifications with external partners (ie. API integrations).

• Maintenance:

◦ Secure and stabilize existing production environments.

Required Skills (Must-Have)

• PHP Expertise: Strong mastery of PHP 7 & 8 (migration experience).

• Debugging: Ability to investigate complex legacy code without up-to-date documentation.

• Database: Proficient in MySQL/PostgreSQL.

• Mindset: Rigorous, autonomous, and focused on stability.

Nice to Have

• Drupal experience

• Experience with Gitlab CI/CD (for testing migrations).

• Familiarity with Symfony or custom legacy frameworks.

• Basic understanding of Node.js, though coding in it is not required

💡About Epom:

We are a family of ad tech products designed for meaningful advertising. Our brand is an early adopter of programmatic and ad tech innovations. We entered the industry at its dawn and honed an ad serving technology to perfection.

Today, we produce solid pieces of ad technology to empower brands, agencies, and networks. We make ad tech accessible, transparent, and effective for our clients. On the other side, we are flexible, friendly, and value the human approach to the business.

⚡️Epom Product:

White-label DSP

A sleek toolkit for your programmatic campaigns. Thanks to a refined set of Bidding Autopilot algorithms, it works — you just revise. The white-label functionality guarantees 100% data transparency, custom targeting options, no bid markups, and all admin benefits.

⚙️ Technology stack:

🔹 Java, Tomcat, Consul, Docker, Maven, Git

🔹 Kafka, Druid, Aerospike, MongoDB, ClickHouse, Mysql

🔹 SDLC: Jira, Bamboo, Bitbucket, SonarQube, Confluence

📈Requirements:

🔹2 years of proven experience with Java

🔹Knowledge of architectural patterns and programming paradigms (OOP, SOLID, LLD, etc)

🔹At least an understanding of multithreading and concurrency. Experience is a plus

🔹Understanding REST API concepts and HTTP protocol

🔹Any RDBMS or NoSQL, Kafka

🔹Docker, Mockito, JUnit, Maven

🔹English — Upper intermediate or above

🪄Experience/understanding will be a plus:

🔹Microservice Architecture

🔹MongoDB, Prometheus, Grafana

🔹Developing high-scale and high-performance distributed systems

🔹High-level design (HLD)

💎We offer:

🔹 Great team ready to assist and give feedback on any stage to celebrate great results together;

🔹 Ongoing opportunities and personal growth in a leading ad tech company;

🔹 Flexible working hours (start your day between 9:00 and 11:00);

🔹 Wellbeing program;

🔹 PE accounting support;

🔹 Paid vacation and sick leaves;

🔹 Social events;

🔹 Good salary in USD that matches your skills and experience.

Delasport — Implementing Technological Solutions Here and Now

Delasport is an iGaming Software company providing Sports Betting & Online Casino software, and turnkey B2B solutions. Established in 2010, Delasport delivers a one-stop-shop solution of Sports Betting and Online Casino from a White-Label, with a full range of management services to a Plug&Play iFrame and a complete Turnkey. We are establishing an R&D centre in Kyiv, and are looking for top talents to join our team.

TECHNOLOGY STACK
Microservice architecture, Java 21, Spring Boot 3.4+, Kafka, PostgreSQL, Redis, Google Cloud Platform, Kubernetes

RESPONSIBILITIES

• Development of new business initiatives, an extension of existing ones
• Taking an active part in improvements and optimizations to the systems
• Resolve technical problems, critical thinking on the development approach
• Be part of a cross-functional team with end-to-end responsibility for the result
• Taking part in team extension (interviewing, providing feedback, participating in interview post-briefs)

REQUIREMENTS

• 5+ years of commercial development experience using Java-related technologies
• 2+ years of working experience with API development
• Hands-on experience with microservice architecture
• Ambition to write high-quality code covered with unit tests
• Solid debugging and troubleshooting skills
• Proactive and result-oriented mindset
• Strong problem-solving skills
• At least Upper-Intermediate English level

WHAT WE CAN OFFER YOU

• Modern office in Podil with an uninterruptible power supply and the Internet
• Personal time off (21 business days of paid vacation, paid days on special occasions, sick leaves, emergency days off)
• Public holidays
• Health and life insurance with our broker, available starting from the month following the employee’s start date with the company
• Modern technical equipment
• English courses with native speakers
• Ukraine-based educational programs
• Sports activities reimbursement
• Corporate entertainments
• Happy hours on Fridays
• Gig contract support

We are looking for a motivated Junior Backend Developer to join our growing team at WebCoder. This is a great opportunity for someone passionate about backend development who is eager to grow their technical skills while working on meaningful digital projects.

🔧 What You’ll Be Doing:

• Develop and maintain web applications using PHP and modern frameworks.
• WordPress, Woocommerce and Elementor is the must! 
• Work with MySQL / PostgreSQL databases.
• Collaborate with front-end developers.
• Contribute to building integrations with third-party services and AI tools.
• Write clean, maintainable, and testable code.
• Learn and apply best practices in software development under the guidance of senior engineers.

• Participate in team code reviews, stand-ups, and project discussions.

   

🎯 What We’re Looking For:

• Basic experience with PHP, WP, WooCommerce (commercial or educational projects).
• Understanding of relational databases (MySQL / PostgreSQL).
• Familiarity with HTML, CSS, and JavaScript.
• Interest or first-hand experience with Vue.js or React is a plus.
• Passion for learning new technologies, especially AI and automation tools.
• English level — Intermediate or higher will be a plus.

• Problem-solving mindset, attention to detail, and desire to grow as a developer.

   

🚀 What We Offer:

• Work on diverse and meaningful projects — from e-commerce to AI-powered platforms.
• Mentorship from experienced developers and growth opportunities within the company.
• Flexible work hours and remote-first culture.
• Supportive and collaborative team environment.
• Competitive salary.

Akvelon is looking for a Senior Middleware Engineer to join an existing team on the project — a flexible Terminal Operating System (TOS) platform for marine terminal operators that helps optimize and scale port operations. The system is multi-language, highly configurable per site, and supports workflows handling ~12% of all global freight moves.

Responsibilities:

• Develop and maintain middleware/backend services and integrations for a large-scale enterprise platform;
• Design and optimize services with a strong focus on performance, reliability, and scalability;
• Work with Java 11/17 + Spring/Spring Boot, ensuring clean architecture and maintainable code;
• Perform memory management and performance tuning for high-load components;
• Write and maintain unit tests, contribute to overall quality and engineering standards;
• Collaborate with product/engineering stakeholders and communicate progress clearly;
• Occasionally support React-based UI parts when needed (integration points, minor UI tasks).
   

Requirements:

• Senior-level experience in backend/middleware engineering;
• Deep expertise in Java (11/17) + Spring/Spring Boot;
• Strong understanding of JVM memory management, profiling, and performance tuning;
• Solid unit testing practices and hands-on experience with test frameworks;
• Upper-Intermediate English or higher with strong communication skills;
• Ability to travel abroad (business trips to customer sites such as terminals/ports may be required).
   

Nice to have:

• Experience with React (working level);
• Background in logistics, transportation, ports, or other operationally critical enterprise systems.
   

What we offer:

• Long-term cooperation with a stable, existing Akvelon client;
• Opportunity to work on a globally impactful product in the marine logistics domain;
• Professional growth, strong engineering culture, and collaboration with experienced teams;
• B2B contract, competitive compensation;
• Paid vacation and sick leave;
• Flexible schedule and remote work format (subject to travel needs).

Akvelon is looking for a Senior Middleware Engineer to join an existing team on the project — a flexible Terminal Operating System (TOS) platform for marine terminal operators that helps optimize and scale port operations. The system is multi-language, highly configurable per site, and supports workflows handling ~12% of all global freight moves.
 

Responsibilities:

• Develop and maintain middleware/backend services and integrations for a large-scale enterprise platform
   
• Design and optimize services with a strong focus on performance, reliability, and scalability
   
• Work with Java 11/17 + Spring/Spring Boot, ensuring clean architecture and maintainable code
   
• Perform memory management and performance tuning for high-load components
   
• Write and maintain unit tests, contribute to overall quality and engineering standards
   
• Collaborate with product/engineering stakeholders and communicate progress clearly
   
• Occasionally support React-based UI parts when needed (integration points, minor UI tasks)
   

Requirements:

• Senior-level experience in backend/middleware engineering
   
• Deep expertise in Java (11/17) + Spring/Spring Boot
   
• Strong understanding of JVM memory management, profiling, and performance tuning
   
• Solid unit testing practices and hands-on experience with test frameworks
   
• Upper-Intermediate English or higher with strong communication skills
   
• Ability to travel abroad (business trips to customer sites such as terminals/ports may be required)
   

Nice to have:

• Experience with React (working level)
   
• Background in logistics, transportation, ports, or other operationally critical enterprise systems
   

What we offer:

• Long-term cooperation with a stable, existing Akvelon client
   
• Opportunity to work on a globally impactful product in the marine logistics domain
   
• Professional growth, strong engineering culture, and collaboration with experienced teams
   
• B2B contract, competitive compensation
   
• Paid vacation and sick leave
   
• Flexible schedule and remote work format (subject to travel needs)
  
   

If this role sounds like a match, apply now and send us your CV.

Please also share your current location, English level, and travel availability — we’ll get back to you to discuss the next steps.

About Strim Duo:

Strim Duo is a creative and high-tech game and digital product studio headquartered in Limassol, Cyprus. The company provides a wide range of services, including social game development, product engineering, UX/UI design, custom software solutions, mobile applications, and post-launch product support.

Strim Duo helps partners create engaging and highly effective game content: from social and arcade games to MMORPGs and children’s apps, integrating advanced monetization mechanics and social network features (strim-duo.com)
The expertise we’re looking for

• Excellent knowledge PHP 7.4+;
• Good understanding of SOLID;
• Strong knowledge of PHPUnit;
• Experience with Docker;
• Ability to work with Git;
• Knowledge of Nodejs and Symfony will be a plus;

Your position will include

• Development of a backend part in PHP for slot/table/instant games based on the internal Framework;
• Support of existing games, participation in the development of intra-team projects;