{"id":157067,"url":"https://alion.io/job/profesia-senior-backend-software-developer-javaspring-boot-mfd","title":"Senior Backend Software Developer - Java/Spring Boot (m/f/d)","company":{"id":62083,"name":"Deutsche Telekom IT Solutions Slovakia","domain":"deutschetelekomitsolutions.sk","url":"https://alion.io/company/deutschetelekomitsolutions","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"B","score":75,"open_postings":26,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":34,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Košice, Slovakia"],"countries":["SK"],"hiring_countries":["SK"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":30000,"max_usd":60000,"period":"year","method":"role_seniority_country_cell","sample_n":14},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Gradle","optional":false},{"name":"Grafana","optional":false},{"name":"Hibernate","optional":false},{"name":"Java","optional":false},{"name":"JUnit","optional":false},{"name":"Kubernetes","optional":false},{"name":"Maven","optional":false},{"name":"Mockito","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Prometheus","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"Spring Data JPA","optional":false},{"name":"Spring Framework","optional":false},{"name":"Spring Security","optional":false},{"name":"SQL","optional":false},{"name":"Swagger","optional":false},{"name":"Testcontainers","optional":false},{"name":"AWS","optional":true},{"name":"Kotlin","optional":true}],"status":"live","first_seen_at":"2026-08-28T08:38:46Z","employer_posted_date":"2026-08-28","last_verified_at":"2026-10-17T06:38:56Z","board_verified":true,"closed_at":null,"days_open":49,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":49},"description":"Our brand Deutsche Telekom IT Solutions Slovakia entered the life of Košice region in 2006 under the name of T-Systems Slovakia and ever since has been inextricably linked with the region when became one of the founding members of Košice IT Valley. We have managed to grow from scratch to the second largest employer in the eastern part of the country with more than 3900 employees. Our goal is to proactively find new ways to improve and continuously transform into the type of company providing innovative information and communication technology services.\n We are looking for a Senior Backend Developer/Engineer to join the team behind Charisma and take a leading role in building, scaling, and stabilizing a solution that supports complex operational and rollout processes.\nYou will work on backend services at the core of the solution, leading complex technical topics around microservices, integrations, data, performance, security, and system reliability. This is a senior hands-on engineering role where you will shape technical decisions, improve existing production services, and guide how new functionality is designed, delivered, and operated.\nYou will be part of an agile delivery environment where backend, frontend, quality, and business experts work together to turn real business requirements into reliable software. As a senior team member, you will also collaborate closely with customers, stakeholders, architects, and delivery leads to clarify needs, propose solutions, manage technical expectations, and ensure the solution brings measurable business value.\nWHAT WILL YOU DO?\nLead the design, development, and continuous improvement of backend services using Java 17+ and Spring Boot\nDefine and evolve microservices and REST APIs used by the Charisma solution, ensuring scalability, maintainability, security, and operational reliability\nTranslate complex business and customer requirements into robust, maintainable, and scalable technical solutions\nDrive performance optimization, technical stabilization, and root-cause analysis of production services\nDesign data models and lead work with PostgreSQL, SQL optimization, database migrations, and data consistency topics\nApply and promote engineering approaches such as Domain-Driven Design, Event-Driven Architecture, Clean Architecture, and established design patterns\nDesign, review, and document APIs using OpenAPI / Swagger, ensuring they meet integration and stakeholder needs\nLead and support integrations using REST and TARDIS, including troubleshooting and technical alignment with consuming systems\nDefine and improve automated unit, integration, API, performance, and load testing strategies\nWork with Docker, Kubernetes, Git, and CI/CD to improve development, deployment, and operational practices\nImprove application observability and troubleshooting using Prometheus, Grafana, LUMINA, OpenTelemetry, and logging\nCollaborate with frontend engineers, quality engineers, business experts, customers, and stakeholders to deliver end-to-end functionality\nProvide technical guidance, code reviews, mentoring, and support to other engineers working on the same project\nContribute to rollout activities, technical planning, risk identification, and continuous improvement of the overall solution\n YOU WILL SUCCEED IF YOU:\nhave:\nExtensive hands-on experience with Java 17+, Spring Boot, and the Spring Framework, including production-grade enterprise applications\nStrong experience designing, developing, and operating microservices and REST APIs in complex system landscapes\nAdvanced knowledge of PostgreSQL, SQL, data modeling, performance tuning, and database migration strategies\nDeep experience with Spring Data JPA, Hibernate, Spring Security, Spring Web, and Spring Validation\nStrong understanding of modern software architecture and engineering principles, including DDD, Event-Driven Architecture, Clean Architecture, design patterns, and API design best practices\nExperience making technical design decisions and explaining trade-offs to engineers, architects, customers, and non-technical stakeholders\nExperience with Maven or Gradle and strong understanding of build, dependency, and release management\nStrong experience with automated testing using technologies such as JUnit 5, Mockito, Testcontainers, and API testing tools\nProven experience with performance and load testing of large-scale applications, including analysis and remediation of bottlenecks\nPractical production experience with Git, Docker, Kubernetes, and CI/CD\nStrong understanding of observability, monitoring, logging, alerting, and production troubleshooting\nExperience working with REST-based integrations and TARDIS\nExcellent communication skills and proven ability to work directly with customers, stakeholders, architects, delivery leads, and cross-functional teams\nAbility to mentor developers, perform high-quality code reviews, and promote engineering standards within the team\nAnd you speak English (min. B2 level).\nNice to Have:\nExperience with AWS and cloud-native application design\nKnowledge of Kotlin\nExperience with Reactive Programming / WebFlux\nKnowledge of route optimization technologies\nExperience leading technical workshops, solution reviews, or customer-facing technical discussions\nExperience with architectural documentation, technical roadmaps, and production readiness reviews\n WHY SHOULD YOU CHOOSE US?\nWe believe in balance between work and personal life. An attractive and extensive work-life balance portfolio guarantees lasting motivation for employees and thus a better quality of life, promotes physical and mental well-being and contributes to a positive work environment. All this with the aim of providing more freedom in reconciling work, career growth, private life and individual lifestyle. Therefore we offer to our employees over 25 different benefits to improve their personal and professional life in these areas:\nFinancial benefits\nBenefits with focus on learning and development\nBenefits with focus on health and sport\nBenefits with focus on family and work - life balance\nOther benefits\nFor more information about our benefits click to Benefits\nSalary\nFinal salary is negotiable.\nWe are offering base salary depending on seniority level and previous experience of candidate. In addition to base salary we provide variable part and other financial benefits. Base salary will not be lower than 3100€ /brutto.\nAdditional information\n* Please be informed that our remote working possibility is only available within Slovakia due to European taxation regulation.","description_format":"text","description_chars":6565,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":[],"hiring_locations":[{"name":"Slovakia","iso":"SK","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Help Desk & Service Desk","IT Consulting & Digital Transformation","IT Outsourcing & Dedicated Teams"],"lifecycle":[{"event":"open","at":"2026-08-28T08:38:46Z"}],"visa":[],"liveness":{"score":25,"band":"fade","label":"Fading","p_open":1,"p_active":0.459,"p_room":0.55,"age_days":49,"expected_fill_days":34,"reasons":["conf:3","stale_co","urgency","velocity","win:tail"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/profesia-senior-backend-software-developer-javaspring-boot-mfd","json_url":"https://alion.io/job/profesia-senior-backend-software-developer-javaspring-boot-mfd.json","meta":{"generated_at":"2026-10-17T08:06:37Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":10982,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":62083},"rest":"https://alion.io/mcp/rest/get_company?id=62083"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fprofesia-senior-backend-software-developer-javaspring-boot-mfd"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fprofesia-senior-backend-software-developer-javaspring-boot-mfd"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fprofesia-senior-backend-software-developer-javaspring-boot-mfd"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/profesia-senior-backend-software-developer-javaspring-boot-mfd\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fprofesia-senior-backend-software-developer-javaspring-boot-mfd"}]}