Jobs

Requirements:

- Go (Golang): Proven, hands-on experience in Go is essential. 
- English level B2+
 

We offer:

- Attractive financial package

- Paid vacation, holidays and sick leaves

- Challenging projects

- Professional & career growth

- Great atmosphere in a friendly small team

- Flexible working hours

Requirements:

- 5+ years of experience in Golang development

- Experience in PostgreSQL

- Experience in MongoDB

- Experience in Redis

- Experience in Elasticsearch

- Experience in Kafka

- Experience in Docker and Kubernetes

- Strong problem-solving skills and a commitment to delivering high-quality, scalable solutions in a fast-paced environment.

We offer:

• Attractive financial package

• Challenging projects

• Professional & career growth

• Great atmosphere in a friendly small team

Ubidex is seeking a highly skilled Software Engineer to join our team and contribute to the development of a large-scale SaaS platform. In this role, you will be responsible for designing and implementing architectural solutions to ensure high performance and efficiency in our platform for retargeting advertising campaigns and analytics.

Required Skills and Experience:

• 7+ years of experience in backend development in total;
• 5+ years of experience with Go development; capable of building and maintaining high-load backend systems;
• Experience with Linux (Debian / Ubuntu);
• Solid understanding of Docker and container orchestration systems (k8s, swarm);
• Experience with PostgreSQL;
• Experience with In-memory storage (Redis, Aerospike);
• Experience with distributed systems and high-load services;
• Experience with Microservices (API, patterns, background processing);
• Experience in developing REST, GraphQL, gRPC API;
• Solid understanding of KISS, DRY, SOLID principles and design patterns;
• Practical experience with event-driven development patterns;
• Experience with Ansible and CI/CD tools like Gitlab CI;
• Experience with monitoring and logging tools and performance tunning;
• Fast learner with a strong desire to continually acquire new knowledge;

Nice to have:

• Experience with ClickHouse;
• Experience with designing GraphQL and gRPC API;
• Experience with message brokers like RabbitMQ, Apache Kafka, NATs;
• Experience with scripting languages like Python, Bash;
• Experience with Node.js development;

Responsibilities:

• Build high-load (500k+ RPS) distributed system using Golang and Node.js;
• Design and implement backend features from conception through to deployment;
• Analyze system performance metrics and bottlenecks to fine-tune services for maximum efficiency;
• Work closely with team to deliver high-quality features and resolve issues;
• Review code and provide feedback to ensure best practices (e.g., style guidelines, accuracy, testability, and efficiency);
• Define and implement testing strategies, including unit testing, integration testing, and performance testing, to ensure the reliability of the system;
• Stay updated on the latest technologies and tools relevant to the project, and big data processing, making informed decisions on technology adoption
• Be a part of the critical path in a fast-growing project's development and delivery processes.

Product stack:

• On-premise: Docker, Swarm, k8s
• Programming languages: Golang, JavaScript / Node.js
• DB: PostgreSQL, Redis, ClickHouse, Aerospike, Mongo
• Monitoring: Prometheus, Loki, Grafana
• CI/CD: GitLab, Ansible
• Storage: S3(minio)
• Web: nginx, traefik, cloudflare

Who we are:

Selesa offers IT outsourcing, specialist out-staffing, and project management services to enhance business operations. We focus on providing skilled professionals for IT needs, including development, security consulting, and business development. Selesa also manages sales, account management, and human resources to support company growth. Our services are known for efficiency, quality, and strong communication, making us a trusted partner for businesses looking to streamline and secure their IT infrastructure. Originated in Vilnius, Lithuania, we cater to global clients.

Who we are looking for:

Seeking a skilled Backend Developer proficient in Golang to join our fast-paced team. If you excel in backend technologies like PostgreSQL, Kubernetes, Redis, RabbitMQ, gRPC, and Jaeger, your next challenge awaits!

What you’ll be doing:

• Extend, maintain, and optimize backend applications for games.
• Collaborate with other teams for integration and technical designs/documentation.
• Develop and maintain backend services using Golang.
• Manage database operations with PostgreSQL.
• Handle deployment and scaling of containerized applications using Kubernetes.
• Implement caching mechanisms with Redis for enhanced system performance.
• Configure and manage RabbitMQ for seamless inter-service communication.
• Continuously improve code quality, performance, and application responsiveness.

Who you are and whom we’re seeking:

• Experience in slot game creation is a MUST
• Experience with gRPC is desirable, simplifying the creation of distributed applications.
• Familiarity with Jaeger for monitoring and troubleshooting microservices-based systems is beneficial.
• Strong team player with a problem-solving mindset and excellent debugging skills.
• Committed to producing high-quality code.

Please answer the following questions when submitting your application:

1. How many years of experience do you have as a Backend Developer? Additionally, how many years of experience do you have with Golang?
2. Please provide links to the demo slot games you’ve worked on.
3. Please describe examples and your knowledge and experience with all the listed above stack technologies used (PostgreSQL, Kubernetes, Redis, RabbitMQ, gRPC, and Jaeger).
4. Would you agree to do a test task before an interview? This would allow us to evaluate your skills and make an appropriate financial offer to you.
5. What are your Monthly salary expectations for a long-term, full-time position (if we consider 40 hours a week)?

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries. 

About the Product: 

Gett is a technology platform solely focused on corporate Ground Transportation Management (GTM), a market worth over $90Bn globally. It is the GTM category leader, serving over a quarter of the Fortune 500 companies. 

Gett’s cloud-based software aggregates existing transportation providers (corporate fleet, ride-hailing, taxi, and limos) into one single platform, helping businesses manage all of their ground transportation spend, saving time and money. 

About the Role: 
We are building the global grid of ground transportation, embracing the entire world, connecting the dots, similar to telephone and internet grids. 

We are looking for a talented Go developer to join our collaborative and growing development team, a core team responsible for the main flows of the application that directly impact our end users. 

Key Responsibilities: 

• Full software development lifecycle of new applications - from technical design (together with architects and product managers), through implementation, and all the way to deployment and monitoring in production 
• Keeping production stable and working, having a dedicated team as a first line of support 
• Collaborating with other engineering teams to integrate systems and ensure smooth, reliable end-to-end experiences. 

• Improvement of technical health of existing services according to best practices from architects, infra team, or your own insights 

   

Required Competence and Skills:

• 5+ years of experience in backend software development (Python, Ruby, PHP, Go); 
• At least 2 years of experience with Golang;
• Experience in designing and implementing data-driven applications using relational (such as PostgreSQL, MySQL) and NoSQL (such as Redis) databases; 
• Experience with designing RESTful APIs and understanding the HTTP protocol; 
• Experience with Scrum / Agile development methodologies; 
• Experience in writing unit tests; 
• Good English communication skills, both verbal and written; 
• Understanding the business needs and providing optimal customer experience to our users. 
   

Nice to have:

• Experience in optimizing performance in relational databases;
• Experience with gRPC/protobuf; 
• Experience solving high-load problems;
• Experience with concurrent applications.
  
   

Why Us?

- We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

- We provide full accounting and legal support in all countries we operate.

- We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

- We offer a highly competitive package with yearly performance and compensation reviews.

Please note that the position is only for candidates located in POLAND.

About the Product: 

Gett is a technology platform solely focused on corporate Ground Transportation Management (GTM), a market worth over $90Bn globally. It is the GTM category leader, serving over a quarter of the Fortune 500 companies. 

Gett’s cloud-based software aggregates existing transportation providers (corporate fleet, ride-hailing, taxi, and limos) into one single platform, helping businesses manage all of their ground transportation spend, saving time and money. 

About the Role: 

We are building the global grid of ground transportation, embracing the entire world, connecting the dots, similar to telephone and internet grids. 

We are looking for a talented Go developer to join our collaborative and growing development team, a core team responsible for the main flows of the application that directly impact our end users. 

Key Responsibilities: 

• Full software development lifecycle of new applications - from technical design (together with architects and product managers), through implementation, and all the way to deployment and monitoring in production 
• Keeping production stable and working, having a dedicated team as a first line of support 
• Collaborating with other engineering teams to integrate systems and ensure smooth, reliable end-to-end experiences. 
• Improvement of technical health of existing services according to best practices from architects, infra team, or your own insights 
  
   

Required Competence and Skills:

• 5+ years of experience in backend software development (C++, Java, C#, Python, Go, Ruby); 
• Experience in designing and implementing data-driven applications using relational (such as PostgreSQL, MySQL) and NoSQL (such as Redis) databases; 
• Experience with designing RESTful APIs and understanding the HTTP protocol; 
• Experience with Scrum / Agile development methodologies; 
• Experience in writing unit tests; 
• Good English communication skills, both verbal and written; 
• Understanding the business needs and providing optimal customer experience to our users. 
  
   

Nice to have:

• Experience developing in Golang;
• Experience in optimizing performance in relational databases;
• Experience with gRPC/protobuf; 
• Experience solving high-load problems;

Experience with concurrent applications.
 

WavesReach is looking for a Senior Golang Engineer to join a newly formed team working on a long-term travel tech product.
You’ll help build a brand-new B2B solution for business travel search and booking (web & mobile components).

This is a unique chance to join from the very beginning, shape architecture, and solve highly relatable problems for travellers worldwide.
 

Requirements

• 5+ years of commercial backend development, including 2+ years hands-on with Go
• Bachelor’s degree in Computer Science (or related field)
• Strong knowledge of backend development & API design for modern web apps
• Solid fundamentals: databases, testing, CI/CD, cloud
• Ability to use AI-assisted coding tools in daily work
• Experience in a fast-paced, startup-like environment
• English: B2 (Upper-Intermediate)
• Proactive, self-driven, and able to deliver independently while being a team player
   

Responsibilities

• Build a cloud platform that unifies fragmented transportation APIs into a performant, reliable system
• Develop and iterate on new web and mobile components for business travel
• Work in a dynamic environment with rapid iterations and evolving requirements
• Collaborate with the team to create impactful B2B travel solutions
   

What’s in it for you

• Friendly company culture & open communication
• 20 vacation days + 20 sick days
• Financial support for learning & sports
• Free English classes
• Accounting support
• Development support opportunities
• Member of IT Cluster

We are looking for an Infrastructure Software Engineer to join the architecture team of our client. You will be the primary engineer driving two internal projects: a multi-cloud API Gateway, developing Kubernetes operators in Go and integrating with cloud services to provide routing, authentication, observability, and rate limiting; and a Documentation Portal, maintaining and enhancing an internal developer platform that allows teams to write and manage documentation as code. You will take full ownership of both projects, collaborating with teams across the EU and US, and contributing to the architecture and development of internal developer tools.

Responsibilities:

• Lead the API Gateway project
• Research and select the appropriate solution (Envoy, APISIX, Kong, 3scale)
• Build prototypes and integrate with Kubernetes Gateway API
• Develop necessary Kubernetes operators in Go
• Configure integrations with Cloudflare, GCP, and CI/CD pipelines
• Maintain and improve the documentation portal
• Small features, bug fixes, and CI pipeline support in GitLab

Requirements:

• Kubernetes – strong hands-on experience (including Gateway API and writing operators)
• Golang – development of Kubernetes operators and microservices
• Cloudflare – configuration and integration (including Workers)
• JavaScript / TypeScript – development of tooling and frontend maintenance
• GitLab CI/CD – building and maintaining pipelines
• GCP (Google Cloud Platform) – experience with infrastructure, services, and tooling
• Ability to work highly autonomously and take full ownership of projects
• Excellent communication skills and ability to collaborate with multiple teams and stakeholders at different levels
• Strong analytical and architectural thinking, able to propose and defend solutions
• Good English (both written and spoken) for collaboration and presenting solutions

We offer:

• Work schedule is flexible — fixed amount of hours that you need to work per month
• 20 days off per year (10 days every 6 months are charged), unused days do not burn out
• Up to 12 days off for official public holidays
• Reimbursement of 5 sick days per year
• Partial compensation for external courses/conferences (after the completion of the Adaptation Period)
• Partial compensation for external professional certifications
• English group lessons in the office with teachers (free of charge; 2 times a week)
• Reimbursement for sports or massage
• Large library with a scheduled purchase of new books every half a year
• Yearly Individual Development Plan (after the completion of the Adaptation Period)

Send us your resume! We’ll be glad to talk with you in more detail!

About Us We are a leading Israeli IT company with 15 years of market experience and 8 years in Ukraine. Officially registered in Ukraine, Israel, and Estonia, we employ over 100 professionals worldwide. Specializing in successful startup collaboration, we offer services across e-commerce, Fintech, logistics, and healthcare.

Our client , a pioneer in the field of identity data solutions, is revolutionizing how businesses confidently identify their customers and prospects across multiple touchpoints. Whether it’s through websites, applications, or physical locations, they provide innovative ways for their partners to interact with and understand their audiences. We are seeking a Senior Golang Developer to join the team. If you have a passion for working in AdTech and thrive in a dynamic, growth-oriented environment, this is the opportunity for you!

Key Requirements:
🔹 5+ years of professional experience with Golang;
🔹 Proven experience in the AdTech industry;
🔹 Hands-on experience with pre-bid and DSP technologies;
🔹 Strong understanding of building and maintaining high-performance systems;
🔹Ability to work effectively both independently and as part of a team;
🔹 English – Upper-Intermediate or higher.

What you will do:
🔹 Develop and maintain high-performance backend systems using Golang;
🔹 Work on innovative identity verification technologies to improve client interaction experiences;
🔹 Collaborate with cross-functional teams to design and implement scalable and reliable solutions;
🔹 Take ownership of the pre-bid and DPS (Dynamic Price Setting) processes to optimize client campaigns;
🔹 Continuously improve system architecture and processes to meet evolving business needs.

Interview stages:
🔹 HR Interview;
🔹 Tech interview;
🔹 Test task;
🔹 Final interview;
🔹 Reference check;
🔹 Offer.

Why Join Us?
🔹 Be part of a friendly international team, working together on interesting global projects;
🔹 Enjoy many chances to grow, learn from mentors, and work on projects that make a real difference;
🔹 Join a team that loves fresh ideas and supports creativity and new solutions;
🔹 Work closely with clients, building great communication skills and learning directly from their needs;
🔹 Thrive in a workplace that values your needs, offering flexibility and a good balance between work and life.

ABOUT CLIENT

This is an AI-powered platform designed to support content creators. It enables them to build personalized and interactive services available across multiple devices and platforms. The system functions as an all-in-one space for managing memberships and communities, distributing premium content, and using engagement tools. Everything is brought together in a single environment that can be flexibly configured to meet the needs of each creator.
 

PROJECT TECH STACK

Go, Postgres, MySQL
 

PROJECT STAGE

Live product
 

QUALIFICATIONS AND SKILLS

• Proven experience as a backend engineer (5+ years preferred)
• Strong hands-on experience with Golang (experience with Rust or Java is a plus)
• Experience with relational databases (e.g., Postgres, MySQL)
• Solid understanding of algorithms, data structures, and API design
• Strong communication and ability to collaborate across teams

NICE TO HAVE

• Experience with cloud technologies
• Experience in video streaming or OTT platforms.
• Experience with graphql
• Knowledge of DevOps best practices
   

RESPONSIBILITIES

• Architect, implement, and maintain highly scalable backend systems.
• Collaborate with product, design, and frontend teams in order to build the right solutions.
• Balance short-term deliverables and long-term vision to design solutions that can evolve with the business.
• Write reusable, testable, and efficient code.
• Maintain high development standards through code reviews, documentation, and collaboration.

We’re looking for a Senior Golang Engineer to join a high-performing team at Recorded Future. You’ll work on building scalable, resilient, and high-performance backend systems, integrating with a variety of external services, and taking full ownership of the development lifecycle.

What you’ll do

• Design, develop, and maintain distributed systems in Go;
• Build new features and integrations with external APIs and data sources;
• Work with large-scale data pipelines (Kafka, gRPC, Colly);
• Collaborate with developers, data engineers, and product teams;
• Take ownership of features from ideation to deployment and maintenance;
• Contribute to best practices and improve system performance and reliability.

What we’re looking for

• 5+ years of Golang experience;
• Experience with Go frameworks: Fiber, Echo, Colly;
• Knowledge of distributed systems and message brokers (Kafka);
• Hands-on experience with gRPC;
• Strong database knowledge:NoSQL: MongoDB, Elasticsearch, Redis, SQL: PostgreSQL, MySQL;
• Proficient with Git and CI/CD practices.

Nice to have

• Experience with OCR tools;
• Familiarity with Ansible, Kubernetes, Prometheus;
• Interest in security, risk, or fraud-related systems.

We offer:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

Experience Required: 5+ years
Work Type/Location: Remote from Poland
 

Technical Requirements

• Proven experience in GoLang development (5+ years) within cloud-based environments.
• Strong understanding of Microsoft Azure services and cloud infrastructure.
• Expertise in PostgreSQL and relational database design.
• Hands-on experience with microservices architecture, RESTful APIs, and container technologies.
• Familiarity with Agile/Scrum methodologies and DevOps practices.
• Excellent communication skills and experience collaborating with client teams.

Required Skills

• GoLang
• Microsoft Azure
• PostgreSQL
• Microservices
• RESTful APIs
• Agile & Scrum

Main Responsibilities

• 80% – Developing new features and functionality
• 20% – Maintenance tasks, bug fixing, and 3rd-level support

About the Project

This project focuses on building and maintaining cloud-based applications using GoLang, Azure services, and microservices architecture. The role involves collaborating with international teams, following Agile practices, and contributing to both feature development and ongoing support.

Our client is a B2B SaaS company (unicorn level) that drives growth for its clients around the world. They are the #1 AI-native platform for Customer Experience and Marketing—offers marketers a single platform to deliver unique experiences per person, drive profitable growth, and unleash peak productivity and efficiency. Their platform connects data across channels, predicts future behavior with AI, and individualizes experiences from a single platform.

They are looking for a Senior Software Engineer, who will help our team create and implement a wide variety of web-based products using GoLang or Node.js, and wants to take their career one step further. If you think you are one of those people, here you will have the chance to work with the world's leading brands with Artificial Intelligence & Machine Learning technologies.  

Responsibilities:

• Designing, implementing and maintaining APIs and services,
• Identifying and solving complex technical challenges creatively and effectively,
• Nurture a team culture that fosters collaboration and high performance,
• Providing guidance and support to team members, helping them develop their technical skills

• Monitoring and optimizing key performance metrics

   

Requirements:

• You've had experience in technically leading a team of engineers
• You've had 5+ years of designing highly-scalable and highly-available systems, most of it in Go
• You take pride in your engineering practices
• Quality and documentation are not an afterthought for you
• You are a good communicator and fluent in English

We’re seeking an ambitious and experienced Back End Team Lead to take charge of our frontend direction, shape architecture, and guide a small but passionate engineering team to excellence.

     Team Leadership
 

• Lead and mentor a small backend engineering team
• Set goals, monitor performance, and ensure timely delivery of projects
• Define best practices, maintain high code quality, and review pull requests
• Support professional growth through regular 1:1s and technical guidance
• Collaborate closely with frontend, DevOps, and product teams to align development efforts
  
  Technical Ownership
   
• Design and implement backend architecture for high-load, distributed systems
• Drive scalability, security, and performance improvements across all services
• Define APIs and data flow between services and external integrations
• Manage deployment, monitoring, and CI/CD automation processes
• Optimize resource usage and data pipelines for efficiency and reliability
  
  Requirements
   
• 5+ years of hands-on experience with Golang
• Strong understanding of PostgreSQL, Elasticsearch, and ClickHouse
• Proven experience with Kafka and containerization using Docker
• Familiarity with Kubernetes, RabbitMQ, or Apache Pulsar is a big plus
• Experience designing and maintaining high-load backend architectures
• Prior experience leading or mentoring a small team of engineers
• Ability to work independently and make architecture-level decisions
• Solid understanding of system design, distributed systems, and microservices
  
  What We Offer
   
• Fully remote position with flexible working hours
• Full ownership of backend architecture and technical direction
• A high-impact role with real influence on product scalability and reliability
• A collaborative, high-performance engineering culture
• 25 calendar days of paid vacation + public holidays
• Paid sick leave
• Competitive compensation package (base salary + performance bonuses)
• Access to professional growth opportunities, conferences, and technical training

We are the creators of a new fintech era!
Our mission is to revolutionize the world by making blockchain technology accessible to everyone in everyday life. WhiteBIT is a global team of more than 1,200 professionals united by a shared vision of shaping the Web3 future.
We are building our own blockchain ecosystem, ensuring maximum transparency and security for over 8 million users worldwide. Our cutting-edge solutions, rapid adaptation to market challenges, and technological excellence set us apart from traditional companies.
Our official partners include the National Football Team of Ukraine, FC Barcelona, Lifecell, FACEIT, and VISA.


The future of Web3 starts with you: join us as a Solidity & Golang Software Engineer!

Requirements:

• Experience: 4+ years of professional experience in software engineering, where the last 2+ years was hands-on experience with Solidity and Golang stack of technology (with a strong focus on blockchain domain).
• Blockchain Expertise: Extensive experience with Ethereum, including a deep understanding of its protocol, smart contract development, and associated technologies.
• Hands-on experience in developing, deploying and maintaining smart contracts on EVM chains (Solidity). 
• Familiarity with smart contracts security best practices, upgradability and DeFi protocols. 
• Microservices and APIs: experience in developing microservices and APIs, with knowledge of RESTful and/or gRPC frameworks.
• Kubernetes and CI/CD: familiarity with Kubernetes for container orchestration and CI/CD tools for deployment automation.
• Monitoring Tools: Familiarity with monitoring tools such as Prometheus and Grafana for performance tracking. 
• Cloud Platforms: Familiarity with cloud platforms (preferably AWS) and experience with containerization (Docker) is a strong plus.
   

Would be a plus:

• Knowledge of Layer 2 Solutions: Familiarity with Layer 2 (L2) solutions, rollups, and the OP stack, with a clear understanding of their advantages and applications.
• Experience with Zero Knowledge technologies.
• Experience interacting with the Solana network and writing smart contracts in Rust.
• Experience in conducting and successfully passing smart contract security audits.

• Experience in developing blockchain nodes, bridges, indexers, etc.

   

Responsibilities:

• Design, develop, and maintain blockchain solutions, focusing on Ethereum and its associated technologies.
• Design, develop and maintain smart contracts on EVM chains (Solidity)
• Write, test, and deploy smart contracts, ensuring security and performance optimization.
• Implement and manage Layer 2 solutions and rollups, optimizing scalability and efficiency of blockchain applications.
• Design and develop microservices and APIs to support scalable applications, ensuring seamless integration with existing systems.
• Fostering collaboration, knowledge sharing, and professional growth.
• Work closely with cross-functional teams to define project requirements and ensure alignment with business objectives.
• Stay updated on advancements in blockchain technology and Ethereum, and apply new features and best practices to enhance our solutions.