Спеціалізація: Back End

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Senior Full Stack Developer (Go/React)

Location:
Europe
Job format:
Remote
Vacancy level:
Senior
English:
Upper Intermediate
Company:
Product
Back End Front End Go JavaScript React

Senior Full Stack Developer (Go/React)

💛 💙 Hi all!
We are looking for a Senior Full Stack Developer (Go/React) for our client. The product telecommunications company is a transit provider of voice and SMS traffic, as well as several lines of business, so the company brings stable income, but at the same time it has not lost the lightness and flexibility of a startup. The company’s clients are large international companies and corporations that use the SMS platform to develop and improve their own business.

The company was founded in 2007 with a mission to provide intelligent communication solutions for organizations of all sizes. Initial products focused on global voice connections, but they later expanded their product offering to include messaging, fax, and chat. With a head office in a high-tech hub located around Tel Aviv and offices in in Sofia and Kyiv, they are able to attract the best technical and business personnel who are focused on providing the highest quality services to their partners and customers. They are proud to be chosen by many global Tier 1 companies from over 100 countries to meet their business-critical communications needs.

Location: remote or office in Bulgaria
Offices: Bulgaria – Sofia
Company Type: Product
Vacancy level: Senior
Requirements for spoken English: Upper-Intermediate

We expect

🎯 

  • Minimum 4+ years of commercial experience (minimum 3 with backend);
  • 3+ years of experience with GoLang;
  • 2+ years of experience with React.js
  • Experience with MongoDB;
  • Strong knowledge of TypeScript;
  • Experience with SQL and NoSQL databases;
  • Ability to work independently and in a team environment.

Responsibilities

💼

  • Participation in designing and developing new features and projects, occasionally leading to the realization of new development opportunities;
  • Presenting demos as part of your team to stakeholders;
  • Investigating, diagnosing, and resolving product issues, striving for constant product improvement.

We offer

⚽  Social package and other bonuses:

  • Your Wellness: Access to mental health programs, comprehensive medical insurance, and a sports card.
  • Your Happiness: Enjoy the company of cool teammates, a friendly atmosphere, a strong mentorship, and a variety of bonuses & corporate gifts.
  • Your Development: Benefit from free educational events & courses, and English classes with native speakers.
  • Your Career: Focus on your professional development in a supportive environment.
  • Work-Life Balance: Choose your working format – remote, office-based, or hybrid and engage in team-building activities.
  • Think this role’s got your name on it? Go ahead and apply, we’d love to see what you’ve got!

*Medical Insurance and Sport Card perks are available for employees located in Bulgaria.

 

🏝  Vacation and sick leave:

  • 20 works days;
  • sick leave is not fixed.

 

📢 What are the stages of selection:

  • HR prescreen + English check (30 min);
  • Technical Interview with  Lead (1 hour);
  • Technical  Interview with CTO (40 min).
Location:
Europe
Job format:
Remote
Vacancy level:
Senior
English:
Upper Intermediate
Company:
Product
Back End Front End Go JavaScript React
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Full Stack Developer (Java & Vue.js)

Location:
Almaty Kyiv Warsaw
Job format:
Office
Vacancy level:
Junior / Middle
English:
Intermediate
Company:
Product Fintech
Back End Front End Java JavaScript

Full Stack Developer (Java & Vue.js)

💛 💙 Привіт, друже!

Ми шукаємо проактивного Full Stack Developer (Java & Vue.js) для нашого клієнта – міжнародної фінтех компанії з України.

Це продуктова компанія, яка створила та розвиває свою платіжну систему для будь-якого онлайн-бізнесу. ЇЇ головною особливістю як провайдера платіжних послуг є можливість створювати індивідуальні рішення та працювати за принципом клієнтської турботи на кожному етапі взаємодії з клієнтом, від запитів на підключення до інтеграції та підтримки транзакцій. Клієнтами є інтернет-магазини, маркетплейси, банки, страхові компанії, благодійні організації та будь-які інші компанії, які здійснюють онлайн-платіжні операції. Компанія працює по всьому світу, робить платежі зрозумілими та доступними, не планує зупинятися на досягнутому та продовжує свій розвиток аж до Місяця)

🕹Tools we use:

  • Quarkus, Spring Framework
  • Hibernate, Flyway, PostgreSQL, HQL
  • Jackson Scheduling, Webhook processing
    Fault Tolerance
  • JUnit, Mockito, Rest-Assured
  • Vue.js, JavaScript, JQuery, Bootrap
  • Docker, Docker-compose

Will be a plus: Jenkins, AWS

👨🏻‍💻 Why we have opened this vacancy: Team extension

We expect

🎯 

  • 2-3 years of hands-on experience in Java and JavaScript Web development. 
  • Strong understanding of relational databases and SQL (PostgreSQL preferred).
  • Knowledge of RESTful API development and JSON processing.
  • Basic knowledge of CI/CD.
  • Experience with Agile/Scrum methodologies.
  • Basic understanding of reactive programming principles.
  • Familiarity with unit and integration testing frameworks.

Nice to have

👑

  • Work experience in the fintech industry: processing payments, orders or transactions.
  • Strong problem-solving skills and attention to detail.
  • Excellent communication and teamwork skills.

Responsibilities

💼

  • Розробка та вдосконалення backend-рішень на Java;
  • Аналіз бізнес-вимог та участь у пошуку ефективних технічних рішень;
  • Виявлення та усунення логічних помилок і системних збоїв;
  • Написання та підтримка unit та integration тестів;
  • Участь у розвитку та підтримці REST API;
  • Взаємодія з командою розробки та внутрішніми замовниками.

We offer

⚽ 

  • Всі необхідні ресурси: техніка, підписки на важливі сервіси та все, що покращить ефективність).
  • Комфортний робочий простір у Київському офісі, навіть під час блекаутів тебе чекає стабільний вайфай, те саме “електрохарчування”, незалежне опалення, спортзона, душ та навіть місце для сну!
  • Різні опції працевлаштування з першого дня роботи.
  • Гнучкий робочий графік: 8 годин з 08:00 – 10:00 до 17:00 – 19:00.
  • 24 робочих дні оплачуваної відпустки. Якщо ти трудоголік і не використав її – компенсуємо грошима.
  • Оплачувані лікарняні в повному обсязі.
  • Ментальне та фізичне здоров’я – медичне страхування та сесії із психологинями.
  • Корпоративні обіди на власний смак від GudFood.
  • Підтримка у вивченні англійської мови або інший мов, особливо для експансії на нові ринки!
  • Оплата навчання (курси, тренінги, семінари) для професійного зростання і розвитку команди.

 

📢 короткий recruiting flow – найм після 2 співбесід 

Location:
Almaty Kyiv Warsaw
Job format:
Office
Vacancy level:
Junior / Middle
English:
Intermediate
Company:
Product Fintech
Back End Front End Java JavaScript
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Fullstack Technical Lead React/Node.js

Location:
Latin America
Job format:
Remote
Vacancy level:
Tech Lead
English:
Upper Intermediate
Company:
Outsourcing
AWS Back End Front End Kubernetes Node React Technical Lead

Fullstack Technical Lead React/Node.js

💛 💙 Hi all!
We are looking for a Fullstack Technical Lead React/Node.js to join our client, outsourcing/outstaffing company with more than 8 years of experience in web and mobile application development with a team of more than 120 specialists from 6 countries.

Project: our customer is an innovative company that utilizes state-of-the-art technology to assist in the care of elderly people. By using predictive algorithms, AI, and IoT home devices, the ecosystem creates an interactive tool that enables care services to better understand and support each elderly individual.

👨🏻‍💻 You can be part of the following team: 3 full-stack engineers (based in LATAM)

Why we have opened this vacancy: Team extension.

📌Tools we use: Jira, Confluence, Git, Figma

🏠Location: Latin America

🌎‍Type of cooperation: Full-time, remote, UTC−06:00, Austin Texas time zone Central Time (CT)

We expect

🎯 

  • 8+ years of  full-stack development experience with Node.js and React
  • Proven experience leading development teams in agile environments (prefferebe at mid-sized companies).
  • Strong knowledge of microservices, REST APIs, and cloud platforms (AWS preferred).
  • Track record of setting processes, KPIs, and delivering milestones.
  • Hands-on troubleshooting skills in production environments.
  • Collaborative, customer-centric approach to problem-solving
  • Strong leadership, architectural thinking, communication, and ownership.
  • Able to work according to the Austin, Texas time zone(UTC−06:00, Central Time (CT)

Responsibilities

💼

  • Lead a global full-stack team developing web and mobile apps
  • Own architecture and technical design across database, backend, and client-side
  • Design scalable solutions with Node.js, React, and React Native
  • Guide QA and testing processes to ensure high product quality
  • Mentor engineers and foster professional growth
  • Partner with Product to define and deliver the roadmap

We offer

⚽  Social package and other bonuses:

  • Stable and highly-functioning processes – everyone has their own role and clear responsibilities, so decisions are made quickly and without unnecessary approvals.
  • We will be happy to pay 50% of the cost of courses/conferences/speaking clubs.
  • Do you have a friend who is currently looking for new job opportunities? Recommend them to us and get a bonus.
  • The company promotes growth and encourages initiatives.
  • A modern stack of technologies, the opportunity to work at a high load, modern equipment, with constant improvements at the request of employees.
  • Top management, open to communication with teams.

 

A little more information that you may find useful:

  • our adaptation period lasts 3 months, this period of time is enough for us to understand each other better;
  • there is a performance review after each year of our collaboration where we use a skills map to track your growth;
  • we really have no boundaries in the truest sense of the word – we have flexible working day, remote or office is up to you.

 

🏝  Vacation and sick leave

  • 21 working days off a year;
  • 5 sick leaves a year.

 

📢 What are the stages of selection:

  • Call, HR.
  • Client: Screening ( 30 minutes), Tech, C-level management interview, HR interview.

Location:
Latin America
Job format:
Remote
Vacancy level:
Tech Lead
English:
Upper Intermediate
Company:
Outsourcing
AWS Back End Front End Kubernetes Node React Technical Lead
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Senior Backend Developer (Go)

Location:
Europe
Job format:
Remote
Vacancy level:
Senior
English:
Upper Intermediate
Company:
Product
Back End Go React

Senior Backend Developer (Go)

💛 💙 Hi all!
We are looking for a Senior Backend Developer (Go) for our client

Location: remote or office in Bulgaria
Offices in Tel Aviv, Sofia and Kyiv
Company Type: Product
Requirements for spoken English: Upper-Intermediate

The product telecommunications company is a transit provider of voice and SMS traffic, as well as several lines of business, so the company brings stable income, but at the same time it has not lost the lightness and flexibility of a startup.
The main products are the MessageWhiz – Messaging Platform and Call Centre Connect. The company’s clients are large international companies and corporations that use the SMS platform to develop and improve their own business.

The company was founded in 2007 with a mission to provide intelligent communication solutions for organizations of all sizes. Initial products focused on global voice connections, but they later expanded their product offering to include messaging, fax, and chat. With a head office in a high-tech hub located around Tel Aviv and offices in Sofia and Kyiv, they are able to attract the best technical and business personnel who are focused on providing the highest quality services to their partners and customers. They are proud to be chosen by many global Tier 1 companies from over 100 countries to meet their business-critical communications needs.

We expect

🎯 

  • Minimum 4+ years of commercial experience with backend;
  • 3+ years of experience with GoLang;
  • Experience with MongoDB or DocumentDB;
  • Experience with SQL and NoSQL databases;
  • Ability to work independently and in a team environment.

Nice to have

  • Experience with any frontend frameworks;
  • Experience with React.js.

Responsibilities

💼

  • Participation in designing and developing new features and projects, occasionally leading to the realization of new development opportunities;
  • Presenting demos as part of your team to stakeholders;
  • Investigating, diagnosing, and resolving product issues, striving for constant product improvement.

We offer

⚽  Social package and other bonuses:

  • Your Wellness: Access to mental health programs, comprehensive medical insurance, and a sports card.
  • Your Happiness: Enjoy the company of cool teammates, a friendly atmosphere, a strong mentorship, and a variety of bonuses & corporate gifts.
  • Your Development: Benefit from free educational events & courses, and English classes with native speakers.
  • Your Career: Focus on your professional development in a supportive environment.
  • Work-Life Balance: Choose your working format – remote, office-based, or hybrid and engage in team-building activities.
  • Think this role’s got your name on it? Go ahead and apply, we’d love to see what you’ve got!

*Medical Insurance and Sport Card perks are available for employees located in Bulgaria.

 

🏝  Vacation and sick leave:

  • 24 calendar days;
  • sick leave is not fixed.

 

📢 What are the stages of selection:

  • HR prescreen + English check (30 min);
  • Technical interview with Tech Lead and Senior Golang Engineer (1 hour);
  • Technical Interview with CTO (40 min).

Location:
Europe
Job format:
Remote
Vacancy level:
Senior
English:
Upper Intermediate
Company:
Product
Back End Go React
← Back to all vacancies

Platform & Analytics Engineer (Python / Data Science)

Location:
Europe
Job format:
Remote
Vacancy level:
Senior
English:
Upper Intermediate
Company:
Outsource
AWS Data Science Python

Platform & Analytics Engineer (Python / Data Science)

💛 💙 Hi all!
We are looking for a Platform & Analytics Engineer (Python / Data Science)  to join our client, outsourcing/outstaffing company with more than 8 years of experience in web and mobile application development with a team of more than 120 specialists from 6 countries.

Project domain: Mobility & Transportation Technology

The project is focused on developing technological solutions for the mobility industry, covering aviation, shipping, and railway transportation. The company leverages modern software and hardware technologies to optimize vehicle management, enhance the efficiency of logistics processes, and improve the user experience.

👨🏻‍💻You can be part of the following team: Engineering manager, Senior Backend Devs, QAs,  PO, Client CTO.

🌎Team time zone: EEA or Switzerland

🕹Tools we use: Jira, Confluence, Git, Figma

We expect

🎯 

  • Minimum of 5 years of hands-on experience in Python programming.
  • Familiarity with FastAPI or Quart for API Development.
  • Proficient with PostgreSQL (SQL, schema design, query optimization).
  • Comfortable with MongoDB or other NoSQL systems.
  • Competent in data wrangling and analysis using Pandas/NumPy.
  • Good working knowledge of statistics and experiment frameworks (e.g. A/B testing, causal inference, experiment design).
  • Basic experience with CI/CD and containerization (e.g. Docker).
  • Upper-Intermediate English level.

Nice to have

👑

  • Familiarity with core AWS services (e.g. Cloudwatch, ECS, S3, RDS).
  • Experience with data visualization (Plotly, matplotlib, seaborn, or BI tools).
  • AI/LLM tooling integration (e.g. OpenAI/Anthropic APIs, agent design, AI-assisted developer workflows).
  • Previous experience shaping or extending internal developer platforms.
  • Startup or small-team background where versatility was key.
  • Experience with Flutter (for Web) for the client-side of the developer platform.

Responsibilities

💼

  • Backend API development.
  • Database management.
  • Data analysis.

We offer

  • ⚽ 
  • We have stable and highly-functioning processes – everyone has their own role and clear responsibilities, so decisions are made quickly and without unnecessary approvals. 
  • You will have enough independence to make decisions that can affect not only the project but also the work of the company.
  • We are a team of like-minded experts who create interesting products during working hours, and enjoy spending free time together.
  • Do you like to learn something new in your profession, or do you want to improve your English? We will be happy to pay 50% of the cost of courses/conferences/speaking clubs.
  • Do you want an individual development plan? We will form one especially for you + you can count on mentoring from our seniors and leaders.
  • Do you have a friend who is currently looking for new job opportunities? Recommend them to us and get a bonus.
  • Are you thinking about taking out insurance? This is also what we can offer you.
  • And what if you want to relax? Then we have 21 working days off. We also have 11 paid days off for Public Holidays.
  • What if you’re feeling bad? You can take 5 sick leaves a year.
  • Do you want to volunteer? We will add you to a chat, where we can get a bulletproof vest, buy a pickup truck or send children’s drawings to the front.
  • And we have the most empathetic HRs (who also volunteers!). So we are ready to support your well-being in various ways.

📢 What are the stages of selection:

  • HR, Client Tech interview, Client Final.

A little more information that you may find useful:

  • our adaptation period lasts 3 months, this period of time is enough for us to understand each other better;
  • there is a performance review after each year of our collaboration where we use a skills map to track your growth;
  • we really have no boundaries in the truest sense of the word – we have a flexible working day.

We are looking for like-minded professionals who believe in making the world a better place by building technology that’s meant to last and scale.

Location:
Europe
Job format:
Remote
Vacancy level:
Senior
English:
Upper Intermediate
Company:
Outsource
AWS Data Science Python
← Back to all vacancies

Senior Full Stack Developer (Flutter/Go)

Location:
Europe
Job format:
Remote
Vacancy level:
Senior
English:
Upper Intermediate
Company:
Product
Back End Flutter Go Mobile Apps

Senior Full Stack Developer (Flutter/Go)

💛 💙 Hi all!
We are looking for a Senior Full Stack Developer (Flutter/Go) to join our client, the product telecommunications company is a transit provider of voice and SMS traffic, as well as several lines of business, so the company brings stable income, but at the same time it has not lost the lightness and flexibility of a startup.
The company’s clients are large international companies and corporations that use the SMS platform to develop and improve their own business.

The company was founded in 2007 with a mission to provide intelligent communication solutions for organizations of all sizes. Initial products focused on global voice connections, but they later expanded their product offering to include messaging, fax, and chat. With a head office in a high-tech hub located around Tel Aviv and offices in Sofia and Kyiv, they are able to attract the best technical and business personnel who are focused on providing the highest quality services to their partners and customers. They are proud to be chosen by many global Tier 1 companies from over 100 countries to meet their business-critical communications needs.

We expect

🎯 

  • 3+ years of experience with Flutter and Dart ,
  • 5 + years of experience in software development;
  • Full Stack development experience, especially with 2+  years of experience with Go, React, or Node.js;
  • Strong understanding of mobile architecture and cross-platform development;
  • Solid experience consuming RESTful or GraphQL APIs;
  • Experience with state management solutions (e.g., BLoC / Cubit, Provider, Riverpod).

Nice to have

👑

  • Experience building or maintaining Flutter plugins (Android/iOS interop);
  • Familiarity with WebRTC, signaling, and real-time streaming protocols;
  • Experience with Firebase, WebSockets, push notifications;
  • Familiarity with clean architecture and test-driven development.

Responsibilities

💼

  • Design and develop high-quality Flutter apps for Android and iOS;
  • Collaborate with backend engineers to define APIs and build full-stack features;
  • Write clean, testable, maintainable Dart code following best practices;
  • Implement custom Flutter plugins to bridge native functionality when needed;
  • Integrate with real-time communication tools (e.g., WebRTC, sockets);
  • Work with product managers and designers to deliver smooth, performant UX;
  • Debug, profile, and optimize performance across devices;
  • Participate in code reviews, architectural discussions, and agile development cycles.

We offer

⚽  Social package and other bonuses:

  • Flexible working hours;
  • Medical insurance after TP.
  • Educational events & courses compensation;
  • English classes with a native speaker;
  • Dynamic corporate life;
  • Minimal bureaucracy, quick decisions;
  • The ability to influence any process, regardless of position in the company;
  • The company promotes growth and encourages initiatives;
  • Established processes following the business strategy;
  • A modern stack of technologies, the opportunity to work at a high load, modern equipment, a modern office, with constant improvements at the request of employees;
  • The opportunity to work both on existing projects and to develop new projects of various sizes;
  • Top management, open to communication with teams;
  • There is an accountant who keeps the employees’ accounts;
  • Full social package with English language courses and speaking club, compensation for various professional courses, trainings and conferences.

🏝  Vacation and sick leave:

  • 20 works days;
  • sick leave is not fixed.

📢 What are the stages of selection:

  • HR prescreen + English check (30 min);
  • Technical interview with Tech Lead and Senior Mobile Engineer (1 hour);
  • Technical Interview with CTO (40 min).

Location:
Europe
Job format:
Remote
Vacancy level:
Senior
English:
Upper Intermediate
Company:
Product
Back End Flutter Go Mobile Apps
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