
Sinch Operator Software AB · Stockholm
DESCRIPTION Sinch Telco is a standalone business within Sinch. Our products propel communications services for mobile operators and enterprises around the glob...
Sinch Telco is a standalone business within Sinch. Our products propel communications services for mobile operators and enterprises around the globe. We are looking for a Principal Software Engineer with focus on AI-driven Development, to accelerate adoption of AI-powered development practices across Sinch Telco.
In this role, you’ll be a hands-on practitioner, leveraging AI agents to design, build and deliver software while shaping how AI is applied in real engineering environments. Together we will move toward a paradigm where software developers manage teams of specialized virtual AI agents for requirements analysis, implementation, testing, documentation, and deployment. We intend to unlock new capabilities that enable teams to build and ship faster with higher quality, security, and maintainability.
You see the future of AI-driven development clearly but understand that progress requires practical steps and patience. You demonstrate value through hands-on work and tangible results. You collaborate well with experienced colleagues as a peer and respect existing domain knowledge while contributing new perspectives and influence through quality of work. You are self-directed, proactive, and comfortable operating with ambiguity. The AI tooling landscape changes rapidly and you are energized by this pace.
Act as a highly productive, hands-on software engineer using AI agent orchestration to deliver features and products across multiple areas
Define, evolve, and scale best practices, workflows, and tooling for AI-assisted development across coding, testing, documentation, and deployment.
Evaluate, select, and configure emerging AI development tools and agent frameworks.
Create reusable agent configurations, custom instructions, and workflows tailored to the organization's codebases.
Partner with engineers, architects, and product managers to define clear requirements and product direction using a product management-informed perspective.
8+ years of software engineering experience with proven ability to design, evaluate, and evolve software architectures.
Solid understanding of distributed systems, APIs, and system integration. Experience with telecom systems, BSS/OSS, messaging infrastructure, or CPaaS is a plus.
Hands-on experience applying AI-assisted development tools such as Copilot, Cursor, Claude, in real-world software delivery, not just experimentation.
Experience working with AI-driven and agent-based development workflows, including autonomous coding agents and multistep task orchestration.
Ability to define clear, structured, and decomposable requirements for both engineers and AI agents, with strong product awareness and understanding of the “why” behind solutions.
Practical experience with Model Context Protocol, tool-use patterns, or equivalent integration standards for reliable multi-agent/tool orchestration. Experience with multi-agent frameworks such as CrewAI, AutoGen, LangGraph is a plus.
Strong communication skills, with the ability to articulate technical concepts, document approaches, and collaborate effectively across teams.
Our corporate language is English, please submit your application in English.
We are not supporting relocation at this time. Applicants must either hold a Swedish or EU/EEA citizenship or have a valid Swedish work permit.
We are committed to ensuring a recruitment process that is fair, objective, consistent, and inclusive.
We believe in a two-way process and encourage you to ask questions throughout the journey. If this role isn't what you're looking for, please explore the other opportunities listed on our career page: https://www.sinch.com/careers/. No matter who you are, we hope you find an exciting path forward - hopefully with us!
We are seeking an experienced and results‑driven SW Test Principal to lead quality assurance and test transformation for large‑scale cloud programs within Amdocs. This role is critical in ensuring end‑to‑end quality, risk mitigation, and delivery confidence across complex, multi‑vendor cloud transformation initiatives in the Nordic region. The successful candidate will play a key role in driving test strategy and execution for a major cloud transformation program, building on Amdocs’ work with Hutchison/3—marking the first full Amdocs CEP transformation across the complete technology stack, including Azure and Microsoft Dynamics. Lead end‑to‑end testing strategy and delivery for large‑scale cloud transformation programs within Amdocs, ensuring alignment with business and program objectives. Own quality outcomes for a major cloud transformation initiative, leveraging experience from complex programs such as Hutchison/3 or similar large BSS/OSS transformations. Manage multi‑vendor and cross‑regional test delivery across Sweden and Denmark, ensuring consistent quality standards and seamless collaboration. Provide matrix leadership to testing and quality resources, including Amdocs teams and regional vendor partners. Define and govern test strategy, scope, environments, data, automation, and defect management across the program lifecycle. Ensure strong stakeholder engagement with program leadership, customers, vendors, and engineering teams, acting as the single point of accountability for quality. Drive risk‑based testing, go‑live readiness, and quality metrics to support confident production releases. Champion cloud testing best practices, including Azure‑based environments, CI/CD, automation, and non‑functional testing (performance, resiliency, security). Establish and run test governance, reporting, and escalation mechanisms across all streams.
Global migration is a 21st-century reality. Whether people are fleeing from something or racing towards better opportunity, following love or seeking new experiences, more and more are living in different environments and in new ways. We celebrate the power of people coming together. That’s why we connect ambitious people abroad with their families and friends back home so they can support each other emotionally and financially, and lead more enriched lives. Why Rebtel? When you join Rebtel, you become part of a global team, bringing together diverse minds from every corner of the world. Our headquarter is nestled in Stockholm and here we strike a balance between dedicated work and more relaxed activities. Every Friday the unmistakable aroma of freshly popped popcorn fills the air, but our celebrations encompass everything from minor and major common accomplishments to cinnamon bun day. What will you do? As a Staff .NET Developer at Rebtel you will serve as the technical guardian and principal individual contributor for the entire Backend (BE) architecture and ecosystem. This role is crucial for ensuring the technical excellence, scalability, reliability, and security of all backend systems that power our core products and services. The Staff Software Engineer will operate at a high level of abstraction, influencing engineering practices across multiple teams while remaining hands-on in critical areas. You’ll be actively involved in architectural decisions, contribute to technical discussions, and inspire your team to deliver clean, robust code. Responsibilities and Tasks: Lead the design, development, and deployment of complex, high-throughput backend services and APIs, ensuring best-in-class performance and maintainability. Drive architectural decisions and serve as the ultimate technical escalation point for BE-related challenges. Establish and articulate a clear, ambitious long-term vision and technical roadmap for the evolution of the BE systems. This includes planning for future growth, anticipating technological shifts, and driving the adoption of new technologies and patterns to maintain a competitive edge. Act as the primary architect for major system initiatives, defining microservices boundaries, data models, integration patterns, and deployment strategies. Proactively identify and resolve technical debt and architectural risks before they impact the business. Mentor engineers, elevating the technical expertise and quality of engineering output across the organization. Influence engineering standards and best practices for testing, performance tuning, and security across different development teams. Requirements: Exceptional and proven proficiency in the .NET area, including extensive experience with C#, .NET Core/8+, and related frameworks (e.g., ASP. NET Core, Entity Framework Core). Must demonstrate the ability to architect and build high-performance, fault-tolerant systems using the .NET stack. Demonstrable architecting skills with a strong background in designing and implementing large-scale, distributed systems (e.g., microservices, event-driven architectures, serverless). Expert knowledge of design patterns, domain-driven design (DDD), and SOLID principles. Extensive experience with at least one major cloud platform (AWS, Azure, or GCP) and related services (e.g., managed databases, message queues, containerization). Deep understanding of various database technologies (SQL and NoSQL) and data modeling best practices for scalable applications. System-Level Thinking: Ability to decompose complex problems into manageable components and evaluate trade-offs between different technical solutions (e.g., speed vs. stability, buy vs. build). Excellent verbal and written communication skills, with the ability to present complex technical ideas clearly to both technical and non-technical stakeholders, driving consensus on critical architectural decisions. Our Offer To You At Rebtel, you are the most important asset and we strive to provide a comprehensive package of benefits and perks that enhance your well-being and work experience. Here are some of the things you can expect from us: Pension Plan Health Checkups, Influenza shots and Private Medical Insurance Occupational insurance Wellness allowance (5,000 SEK) Discount on gym memberships Bonus program Extra parental pay 30 days annual vacation Monday breakfasts, dinner if staying in the office past regular working hours Relocation Support, if you're joining us from afar, we'll assist you in making a smooth transition. Rebtel is an international workplace, and at the office, we speak English; therefore, high English proficiency is required. We are Rebtel. We come from all around the world to create products for anyone who has crossed a border. We believe in equal opportunity and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
Vill du ta en senior testroll där du kombinerar teknisk testning, testautomation och kvalitetssäkring genom hela utvecklingslivscykeln? Vi söker nu en Senior Fullstack Test Engineer till ett uppdrag där du får bidra till att vidareutveckla testarbete, automatisering och kvalitet i digitala tjänster. I rollen arbetar du nära utvecklare, business analysts, testare och andra intressenter för att säkerställa hög kvalitet, stabila leveranser och effektiva testprocesser. Du kommer både att vidareutveckla befintliga automatiserade tester och identifiera nya områden där testautomation kan skapa värde. Om rollen Som Senior Fullstack Test Engineer kommer du att ha en bred och teknisk testroll med fokus på UI-, API- och backendtestning. Du arbetar med att analysera krav, bryta ner dem till testfall, säkerställa acceptanskriterier och driva kvalitet i utvecklingsarbetet. Du kommer även att arbeta med felsökning och analys, exempelvis genom loggar, integrationer och browser DevTools, samt bidra till förbättrad monitorering av befintliga tjänster. Rollen passar dig som har ett testledande mindset och trivs med att både arbeta operativt och driva förbättringar. Exempel på arbetsuppgifter Analysera krav och ta fram testfall för nyutveckling Säkerställa valideringskrav och acceptanskriterier tillsammans med BA och utvecklare Utveckla, underhålla och förbättra automatiserade testsviter Identifiera nya områden för testautomation Automatisera tester inom UI, API och backend Genomföra manuell och explorativ testning vid behov Köra automatiserade testsviter och analysera resultat Rapportera, analysera och följa upp defekter i icke-produktionsmiljöer Undersöka fel i systemtester, drift och incidenter Arbeta med testdata i flera miljöer Bidra till CI/CD och förbättrade deploy- och releaseprocesser Stötta och kompetensutveckla andra testare inom automation, API och backend Vi söker dig som har Minst 5 års erfarenhet som testare och/eller testledare Stark teknisk bakgrund inom testautomation Erfarenhet av att automatisera testfall för UI, API och backend Erfarenhet av API-testning med exempelvis Postman eller Insomnia Kunskap om mikrotjänster och olika API-typer såsom REST, GraphQL och WebSocket Erfarenhet av testautomationsverktyg såsom Cypress, Selenium, Robot Framework eller liknande God förståelse för Software Test Life Cycle Erfarenhet av test management-verktyg Erfarenhet av digitala tjänster Mycket goda kunskaper i engelska Det är meriterande om du har Erfarenhet av DevOps och CI/CD-pipelines God förståelse för agila principer Grundläggande kunskaper inom HTML, CSS och JavaScript Erfarenhet av Cypress och/eller Robot Framework Erfarenhet av test och automation kopplat till kartbaserade verktyg Erfarenhet av AI-verktyg såsom Copilot, AWS Kiro eller liknande Svenska språkkunskaper Som person Vi tror att du är analytisk, strukturerad och kommunikativ. Du har ett starkt kvalitetsfokus och trivs med att samarbeta nära utvecklingsteam och andra intressenter. Du är självgående, nyfiken på nya tekniker och har ett driv att förbättra både testautomatisering, arbetssätt och produktkvalitet. Vi erbjuder 32 dagars semester Full tjänstepension Friskvårdsbidrag Kompetensutveckling Stöttande team