{"id":28774,"url":"https://alion.io/job/1global-backend-software-engineer-golang-or-java","title":"Backend Software Engineer - Golang or Java","company":{"id":6544,"name":"1GLOBAL","domain":"1global.com","url":"https://alion.io/company/1global","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"A","score":98,"open_postings":26,"ghost_share":0,"stale_share":0.077,"repost_share":0,"time_to_fill_p50_days":42,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["São Paulo, Brazil"],"countries":["BR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"DynamoDB","optional":false},{"name":"Git","optional":false},{"name":"Go","optional":false},{"name":"gRPC","optional":false},{"name":"Java","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Redis","optional":false},{"name":"WebSockets","optional":false},{"name":"ActiveMQ","optional":true},{"name":"Apache Kafka","optional":true},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"GCP","optional":true},{"name":"Grafana","optional":true},{"name":"Kubernetes","optional":true},{"name":"Prometheus","optional":true},{"name":"RabbitMQ","optional":true}],"status":"live","first_seen_at":"2026-07-31T00:00:00Z","employer_posted_date":"2026-07-31","last_verified_at":"2026-10-17T06:45:40Z","board_verified":true,"closed_at":null,"days_open":78,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":78},"description":"About Us\n1GLOBAL is a technology-driven global mobile communications provider helping enterprises and consumer brands deliver seamless connectivity worldwide. Powered by a best-in-class telecom platform, proprietary eSIM technology, and its own mobile core network across 15 countries, 1GLOBAL operates as a fully regulated telecommunications provider in 43 countries.\nFounded in 2022, 1GLOBAL has rapidly become one of Europe's fastest-growing telecom technology companies, connecting more than 80 million people and devices globally. Our customers include leading banks, multinational enterprises, global retailers, travel companies, payment service providers, and digital-first businesses.\nHeadquartered in the Netherlands, with R&D hubs in Lisbon, Berlin, and São Paulo, 1GLOBAL employs over 550 professionals across 16 countries. With annual revenues exceeding US$200 million and a strong track record of profitability, we continue to invest in innovation, infrastructure, and international expansion as we redefine the future of global mobile connectivity.\n\nAbout the Team\nYou will be joining a dynamic team at the forefront of developing and maintaining our Network API, xSIM Management System, and Recording Platforms. The Network API powers critical systems and services that enable the creation, configuration, and real-time monitoring of subscriber configurations across a wide array of business scenarios. These include enterprise solutions, IoT deployments, regulatory compliance, and recording services, ensuring seamless connectivity for everyone and everything. Our xSIM Management System is a high-performance, low-latency platform designed to handle hundreds of transactions per second, keeping all xSIMs accurately updated in real time. Meanwhile, our Recording Platforms deliver robust Mobile Compliance & Recording capabilities tailored for financial institutions, automatically capturing client and employee interactions either on-premises or through our secure cloud infrastructure.\nWe run a multi-site platform, following strict security requirements, provide the service to customers around the world and manage millions of subscriber profiles. We embrace a highly collaborative and diverse environment, value teamwork, autonomy and hold ourselves accountable for our deliverables and customer success.\nWe are open to hiring for this position in São Paulo, Brazil. The successfully hired candidate will receive onboarding and training in Lisbon, Portugal; gaining valuable skills while experiencing one of Europe’s most dynamic and renowned cities.\nFluency in English is essential for this role. Please ensure your CV is submitted in English as part of your application.\n\nAbout the Role\nProvide accurate effort estimates to support roadmap planning and effective expectation management.\nDesign and implement resilient, scalable, secure, and fault-tolerant architectures to ensure system reliability and performance.\nDevelop new features and support existing systems across the Network API, xSIM Management System, and Recording Platforms.\nContribute with small, incremental enhancements that seamlessly integrate into the established codebases.\nMaintain and update existing solutions to keep them modern, efficient, and reliable.\nCollaborate with team members to ensure smooth development processes and shared understanding.\nWrite and maintain comprehensive tests to ensure fast regression and reliable validation of new features.\nImplement procedures and metrics to enable effective monitoring and observability of platform contributions.\nParticipate in code reviews to promote high standards of code quality, readability, and maintainability.\nTake ownership of the quality and outcomes of your work, ensuring fully functional end-to-end flows.\nCreate and maintain accurate, up-to-date technical documentation.\nActively contribute to team discussions, with a mindset for continuous improvement and openness to new ideas or technologies.\nRequirements\nAbout You\nMust Have\n3+ years of professional experience in backend development, preferably with Go (Golang). Strong Java experience with willing to learn Go is also welcome.\nStrong understanding of concurrency models, with practical experience in implementing asynchronous workflows, inter-process communication, and synchronisation techniques.\nSkilled in designing, building, and consuming RESTful APIs, following best practices for API design and performance optimisation.\nProven experience working with databases, both relational (e.g., PostgreSQL) and non-relational (e.g., Redis, MongoDB, DynamoDB), including data modelling, query optimisation, and performance tuning.\nExperienced in writing unit tests, integration tests, and benchmarks, with a test-driven development mindset.\nComfortable with networking protocols and distributed communication patterns (e.g., gRPC, WebSockets, TCP/UDP).\nExperienced in building scalable microservices architectures and distributed systems.\nKnowledgeable in applying software engineering best practices and design patterns for maintainable, testable code.\nSkilled in using DevOps tools and practices, including Docker, CI/CD pipelines, and Infrastructure as Code.\nFamiliar with Git workflows and collaborative development processes such as pull requests, code reviews, and agile methodologies.\nDemonstrated accountability for technical outcomes and ownership of end-to-end feature delivery.\nEffective communicator in English, both written and verbal, suitable for a remote and largely asynchronous work environment.\n\nNice to Have\nProficient in writing idiomatic Go code, with solid understanding of the language’s core features such as interfaces, structs, composition, and error handling.\nCompetent in profiling and performance tuning using Go’s built-in tools such as pprof and trace, with a focus on optimisation.\nDemonstrated experience with event-driven architectures, including the implementation of producers and consumers using platforms like Kafka, RabbitMQ, or ActiveMQ.\nSolid hands-on experience deploying, monitoring, and maintaining applications on Kubernetes.\nWorking knowledge of cloud platforms (e.g., AWS, GCP, Azure, Oracle Cloud) with experience deploying cloud-native applications.\nHands-on experience with observability and monitoring tools like Prometheus and Grafana.\nExperience with MSML and SIP is a strong plus.\nBenefits\nWhat We Offer?\nCLT contract - enjoy job stability and reliable benefits that value your work\nQuarterly performance bonuses to reward your hard work and achievements\nMeal allowance paid into Caju card - R$100 per working day\nHealth insurance with SulAmérica - 50% covered by the company\nExtended parental leave - 180 days of maternity leave and 20 days of paternity leave.\nDaycare allowance provided to mothers with children under 3 years old - R$500 per month per child\nWhy 1GLOBAL?\nGrowth Opportunities: Advance your career in one of the fastest growing telecommunications companies, expanding over 50% year-on-year under the leadership of successful tech entrepreneurs.\nMajor Transaction Exposure: Be in the driver’s seat for transactions that will have an impact on the future telco industry.\nWork with a Talented Team: From the Board and the Founders to the Senior Management Team, you will collaborate daily with the most capable and renowned external advisors and constantly being exposed to talented and driven individuals.\nDynamic Work Environment: Thrive in a collaborative, fast-paced workplace where innovation is encouraged, and every contribution counts.\nProfessional Development: Work alongside industry experts to enhance your skills and knowledge in a cutting-edge field.\nInternational Experience: Gain opportunities to work in different 1GLOBAL offices around the world as you grow within the company.\nOpen Communication Culture: Join a team where your ideas are heard, and open dialogue is encouraged, fostering a supportive and transparent work environment.\n Get Things Done Attitude: Be part of a results-driven team that values efficiency, creativity, and the drive to make a tangible impact in the industry.\n1GLOBAL is an equal opportunity employer, we value your character as much as your talent. Diversity drives our innovation, and we offer a collaborative, dynamic, and international work environment. 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