{"id":15474,"date":"2026-08-06T15:44:33","date_gmt":"2026-08-06T08:44:33","guid":{"rendered":"https:\/\/galaxyholdings.co\/?post_type=job&#038;p=15474"},"modified":"2026-08-06T15:44:33","modified_gmt":"2026-08-06T08:44:33","slug":"back-end-developer","status":"publish","type":"job","link":"https:\/\/galaxyholdings.co\/en\/job\/back-end-developer\/","title":{"rendered":"Back-End Developer"},"content":{"rendered":"<p><span style=\"color: #0000ff; font-size: 14pt;\"><strong>Job Summary:<\/strong><\/span><\/p>\n<p><span style=\"font-size: 12pt; color: #000000;\"><strong><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Galaxy Telecom<\/span><\/span><\/strong> is a member company of <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Galaxy Holdings<\/span><\/span> \u2014 a technology conglomerate under Sovico Group. We focus on developing next-generation telecommunications products such as SkyFi \u2013 a next-generation mobile network providing physical SIMs and eSIMs with domestic and international voice and data packages, delivering a flexible, convenient, and borderless user experience.<\/span><\/p>\n<p><span style=\"color: #000000;\">The <strong>Back-End Developer<\/strong> is responsible for designing, developing, and maintaining high-performance server systems, databases, and APIs. This position is also responsible for ensuring the entire Software Development Life Cycle (SDLC), from architecture design and coding to technical documentation.<\/span><\/p>\n<p><strong style=\"color: #0000ff; font-size: 14pt;\">Key Responsibilities:<\/strong><\/p>\n<p class=\"isSelectedEnd\"><span style=\"color: #000000;\"><strong>System Development &amp; Architecture<\/strong><\/span><\/p>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\">Develop robust Back-End services, with a primary focus on Java.<\/span><\/li>\n<li><span style=\"color: #000000;\">Design and implement efficient system communication architectures using REST APIs, gRPC, and build integration systems through Webhooks.<\/span><\/li>\n<li><span style=\"color: #000000;\">Design and develop systems based on Microservices architecture.<\/span><\/li>\n<\/ul>\n<p class=\"isSelectedEnd\"><span style=\"color: #000000;\"><strong>Big Data Processing &amp; Performance Optimization<\/strong><\/span><\/p>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\">Build and operate scalable Big Data processing systems.<\/span><\/li>\n<li><span style=\"color: #000000;\">Optimize system performance to ensure low latency and high throughput.<\/span><\/li>\n<li><span style=\"color: #000000;\">Analyze and optimize database queries.<\/span><\/li>\n<\/ul>\n<p class=\"isSelectedEnd\"><span style=\"color: #000000;\"><strong>Deployment &amp; Operations<\/strong><\/span><\/p>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\">Package applications and manage deployment environments using Docker and Docker Compose.<\/span><\/li>\n<li><span style=\"color: #000000;\">Deploy and monitor systems in the production environment.<\/span><\/li>\n<\/ul>\n<p class=\"isSelectedEnd\"><span style=\"color: #000000;\"><strong>Security &amp; Information Security<\/strong><\/span><\/p>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\">Apply Secure Coding principles throughout the software development process.<\/span><\/li>\n<li><span style=\"color: #000000;\">Ensure system security complies with current information security standards.<\/span><\/li>\n<li><span style=\"color: #000000;\">Handle and protect sensitive data in accordance with applicable regulations.<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #0000ff; font-size: 14pt;\"><strong>Job requirements: <\/strong><\/span><\/p>\n<h3><span style=\"font-size: 14pt; color: #000000;\">Education<\/span><\/h3>\n<p class=\"isSelectedEnd\"><span style=\"color: #000000;\">Bachelor&#8217;s degree in Information Technology, Software Engineering, Computer Science, or related disciplines.<\/span><\/p>\n<h3><span style=\"font-size: 14pt; color: #000000;\">Required Experience &amp; Technical Skills<\/span><\/h3>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\">Minimum of 3+ years of experience as a Back-End Developer.<\/span><\/li>\n<li><span style=\"color: #000000;\">Proficient in Java programming (Spring Boot).<\/span><\/li>\n<li><span style=\"color: #000000;\">Hands-on experience in designing and developing systems based on Microservices architecture.<\/span><\/li>\n<li><span style=\"color: #000000;\">Experience in building Big Data Processing Systems.<\/span><\/li>\n<li><span style=\"color: #000000;\">Experience in system performance optimization.<\/span><\/li>\n<li><span style=\"color: #000000;\">Knowledge of and practical experience in Secure Coding.<\/span><\/li>\n<li><span style=\"color: #000000;\">Proficient in using Docker and containerization technologies.<\/span><\/li>\n<li><span style=\"color: #000000;\">Strong understanding of both relational (SQL) and non-relational (NoSQL) databases.<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-size: 14pt; color: #000000;\">Required Tech Stack<\/span><\/h3>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\"><strong>Programming Language:<\/strong> Java (Spring Boot)<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Architecture:<\/strong> Microservices, Event-Driven Architecture<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Protocols &amp; APIs:<\/strong> REST API, gRPC, Webhooks, GraphQL<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Databases:<\/strong> PostgreSQL, MySQL, MongoDB, Redis, Elasticsearch<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Big Data:<\/strong> Kafka, Spark, Hadoop<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-size: 14pt; color: #000000;\">Information Security Knowledge<\/span><\/h3>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\">Understand and apply the OWASP Top 10 principles.<\/span><\/li>\n<li><span style=\"color: #000000;\">Experience with authentication and authorization mechanisms (OAuth2, JWT, SSO).<\/span><\/li>\n<li><span style=\"color: #000000;\">Strong understanding of best practices for data encryption and key management.<\/span><\/li>\n<li><span style=\"color: #000000;\">Understanding of common security vulnerabilities and mitigation techniques (SQL Injection, XSS, CSRF, etc.).<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-size: 14pt; color: #000000;\">Soft Skills<\/span><\/h3>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\">Strong logical thinking and problem-solving skills.<\/span><\/li>\n<li><span style=\"color: #000000;\">Ability to work independently and collaborate effectively in a team.<\/span><\/li>\n<li><span style=\"color: #000000;\">Proactive, responsible, and highly accountable.<\/span><\/li>\n<li><span style=\"color: #000000;\">Strong technical writing skills with clarity and accuracy.<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-size: 14pt; color: #000000;\">Preferred Qualifications<\/span><\/h3>\n<ul data-spread=\"false\">\n<li><span style=\"color: #000000;\">Experience in the Telecommunications industry.<\/span><\/li>\n<li><span style=\"color: #000000;\">Experience integrating with telecom operator systems (MobiFone, Vinaphone, Viettel).<\/span><\/li>\n<li><span style=\"color: #000000;\">Relevant professional certifications (AWS, Oracle, Spring, Security certifications).<\/span><\/li>\n<li><span style=\"color: #000000;\">Experience with CI\/CD pipelines and Infrastructure as Code.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><span style=\"font-size: 14pt; color: #0000ff;\"><strong><span class=\"rnc2Gd\">Benefits:<\/span><\/strong><\/span><\/h2>\n<ul>\n<li>Competitive salary package (Base salary and performance bonuses).<\/li>\n<li>Probation period salary is 100% of the official salary.<\/li>\n<li>Comprehensive health and accident insurance.<\/li>\n<li>15 days of annual leave, 1 remote work days per month.<\/li>\n<li>Provision of work equipment (Macbook\/ Laptop, mouse, monitor, etc.).<\/li>\n<li>A creative and modern working environment.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"color: #0000ff;\"><span style=\"font-weight: 400;\">Working location: <strong>Red River Building, 885 Hong Ha Street, Hong Ha Ward, Ha Noi<\/strong><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #0000ff;\"><span style=\"font-weight: 400;\">Kindly send your CV to: <\/span><b>talent@galaxyholdings.co\u00a0<\/b><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Job Summary: Galaxy Telecom is a member company of Galaxy Holdings \u2014 a technology conglomerate under Sovico Group. We focus on developing next-generation telecommunications products such as SkyFi \u2013 a next-generation mobile network providing physical SIMs and eSIMs with domestic and international voice and data packages, delivering a flexible, convenient, and borderless user experience. The [&hellip;]<\/p>\n","protected":false},"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"class_list":["post-15474","job","type-job","status-publish","hentry","company-galaxy-telecom","field-tech-en","job_type-full-time-en","location-ha-noi-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/galaxyholdings.co\/en\/wp-json\/wp\/v2\/job\/15474","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/galaxyholdings.co\/en\/wp-json\/wp\/v2\/job"}],"about":[{"href":"https:\/\/galaxyholdings.co\/en\/wp-json\/wp\/v2\/types\/job"}],"wp:attachment":[{"href":"https:\/\/galaxyholdings.co\/en\/wp-json\/wp\/v2\/media?parent=15474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}