Senior Engineer - General

Pinetree AB

OFFER Net Insight is a pioneering technology company within media networks, resource optimization and time synchronization. Their Zyntai solution is used to distribute highly accurate time in critical 5G and network infrastructure — with nanosecond-level precision and without relying on GNSS. We are now looking for a senior engineer with deep knowledge of automatic control, estimation, signal processing and mathematical modelling — combined with strong software engineering skills in modern C++ and Python. This is not a general C++ role. It is a role for someone who wants to work close to the core algorithms, understand the underlying control problem, and turn advanced theory into robust production software. You will join a highly technical team working with a modern product, senior colleagues and complex real-world engineering challenges. Some of the benefits of working at Net Insight: A world leader in media networks, resource optimization and synchronization technology Work with advanced control algorithms in a real-world, large-scale product A highly technical environment with modern tools and senior colleagues Open and flat organization with strong teamwork and knowledge sharing Family-friendly company with flexible working hours Unusually low turnover and high employee satisfaction   THE PRODUCT AREA Zyntai provides critical infrastructure, such as 5G base stations, with extremely accurate time synchronization. A Zyntai network consists of hundreds or thousands of TimeNodes that continuously exchange time information and measurements. The system uses this data to estimate network and oscillator behavior and to control the local clock in each node. This requires advanced algorithms within control theory, estimation, filtering, signal processing and mathematical optimization. The core challenge is to distribute time over complex networks with extremely high accuracy — without depending on GNSS. For more info about the product, visit: https://netinsight.net/5g-sync   THE ROLE AND TEAMS You will work in the team responsible for the core synchronization functionality in Zyntai. The team develops the algorithms and software used to process measurement data, estimate system behavior and control the oscillator in each TimeNode. You will work with methods such as Kalman filtering, Model Predictive Control, PI/PID controllers, state estimation, signal processing and mathematical optimization. Most implementation is done in modern C++ in the TimeNodes. Python is used for modelling, analysis, tooling, testing and development in Zyntai Director, Net Insight’s Kubernetes-based orchestration system for managing TimeNodes. You need to be comfortable moving between theory and implementation: from mathematical reasoning and control system design to production-quality software in a distributed system. YOUR PROFILE We are looking for a senior engineer who combines strong knowledge within control systems with the ability to build high-quality software. You probably enjoy understanding the underlying system — not just the codebase. You like mathematical and algorithmic challenges, and you are comfortable discussing control loops, estimation, stability, filtering, optimization and real-world system behavior. You do not need to have worked with time synchronization before, but you need strong experience from automatic control, applied mathematics, signal processing, robotics, cybernetics, telecom, industrial systems or similar areas. You need to have: Deep knowledge of automatic control, control theory or cybernetics Practical experience from designing, analysing, tuning or implementing control algorithms Strong mathematical foundation within estimation, filtering, optimization, statistics, signal processing or dynamic systems Experience from methods such as Kalman filtering, MPC, PI/PID, observers, state estimation or system identification Strong software engineering skills in modern C++, preferably C++20/23 Good Python skills Experience from Linux-based development Ability to turn complex algorithms into robust, maintainable production code It is an advantage if you have experience from: Time synchronization, PTP, NTP, SyncE or GNSS-independent systems Distributed or networked systems TCP/IP and network communication Kubernetes or cloud-native systems Real-time or near-real-time systems Graph theory, statistics or mathematical optimization Telecom, 5G, industrial systems or robotics This role is a great fit if you want to work where mathematics, control systems and software engineering meet.   ABOUT NET INSIGHT Net Insight is a global leader in media networks, resource optimization, and streaming solutions. With more than 25 years of experience, Net Insight is a trusted and important partner and a leading force in the media tech industry in creating a better media experience. More than 500 world-class customers run mission-critical media services using Net Insight’s solutions in more than 70 countries worldwide.  Net Insight is listed on Nasdaq Stockholm. For more info, visit https://netinsight.net/ ABOUT PINETREE At Pinetree, we have a vision and mission to differentiate ourselves from the crowd and are Sweden's contenders in talent search and matching. By working as an agency, the value to you as an employee is that we have a wide network of partner companies that we continuously ensure high-quality standards. This recruitment is direct employment at Net Insight AB and all applications, questions, administration, and recruitment processes are managed by Pinetree AB.

Tink AB

Visa’s Technology Organization is a community of problem solvers and innovators reshaping the future of commerce. We operate the world’s most sophisticated processing networks capable of handling more than 65k secure transactions a second across 80M merchants, 15k Financial Institutions, and billions of everyday people. While working with us you’ll get to work on complex distributed systems and solve massive scale problems centered on new payment flows, business and data solutions, cyber security, and B2C platforms. The Opportunity:  We are looking for Versatile, curious, and energetic Software Engineers who embrace solving complex challenges on a global scale. As a Visa Software Engineer, you will be an integral part of a multi-functional development team inventing, designing, building, and testing software products that reach a truly global customer base. While building components of powerful payment technology, you will get to see your efforts shaping the digital future of monetary transactions.  The Work itself:  Design code and systems that touch 40% of the world population while influencing Visa’s internal standards for scalability, security, and reusability Collaborate multi-functionally to create design artifacts and develop best-in-class software solutions for multiple Visa technical offerings Actively contribute to product quality improvements, valuable service technology, and new business flows in diverse agile squads Develop robust and scalable products intended for a myriad of customers including end-user merchants, b2b, and business to government solutions. Leverage innovative technologies to build the next generation of Payment Services, Transaction Platforms, Real-Time Payments, and Buy Now Pay Later Technology Opportunities to make a difference on a global or local scale through mentorship and continued learning opportunities  Essential Functions: Demonstrates relevant technical working knowledge to understand requirements. Identifies and contributes to the development and solution strategies to team members that improve the design and functionality of interface features across one or more project features, under minimal guidance. Applies standard processes on the use of programming languages (e.g. HTML, C++, Java) to write code that fulfills website modification requests and technical requirements. Collaborates with others to support the piloting of new technology capabilities and features that enhance the user website experience across e-commerce products. Analyzes bugs for simple issues and applies debugging tools to verify assumptions. The Skills You Bring: Energy and Experience: A growth mindset that is curious and passionate about technologies and enjoys challenging projects on a global scale Challenge the Status Quo: Comfort in pushing the boundaries, “hacking” beyond traditional solutions Language Expertise: Expertise in one or more general development languages (e.g., Java, C#, C++) Builder: Experience building and deploying modern services and web applications with quality and scalability Learner: Constant drive to learn new technologies such as Angular, React, Kubernetes, Docker, etc. Partnership: Experience collaborating with Product, Test, Dev-ops, and Agile/Scrum teams   Qualifications:  Basic Qualifications  Bachelor's degree in Math, Science, Engineering, or Computer Science, Information Systems or related field AND minimum five (5) years of experience in a directly related field. OR Master's degree in Math, Science, Engineering, or Computer Science, Information Systems or related field AND minimum three (3) years of experience in a directly related field. OR Minimum eight (8) years of directly related experience.   Preferred Qualifications  Programming Languages: Knowledge of and ability to develop front-end code (e.g. HTML, CSS, and JavaScript) in support of package and product development. This includes the extension of capabilities of packages and products. Web Browser Optimization: The ability to select the "best available" values of some objective function to improve the functional effectiveness of web browsers. User Interface Design: Knowledge of user interface design, which is the interaction where users and computers interact. This includes an understanding of how to provide an optimal industrial design experience through User Interface (UI) Design. API Generation: The ability to develop and apply Application Program Interfaces (APIs), a set of routines, protocols, and tools for building software applications that specify how software components should interact and are used when programming graphical user

Technology Nexus Secured Business Solutions AB

A specialist in identity, secure transactions, and digital services, IN Groupe is the global leader in secure identity and trust services. Every day, our 4,000 employees across 40 countries work to ensure that everyone has access to a reliable and secure identity, both in the physical and digital worlds. With our solutions and our international network of 10 R&D centers, we support governments and businesses in more than 130 countries. Joining IN Groupe means helping to shape the future of the identity and secure transaction market. Become part of our international teams — driven by innovation and proud to design solutions that make life easier and protect personal data for millions of people around the world. About the role We are looking for a Senior backend engineer to join our Stockholm office with strong, hands‑on expertise in modern Java, experienced in building and maintaining legacy Java code as well as setting up new microservice based applications. Brings solid proficiency in CI/CD and Azure DevOps (or comparable platforms), along with practical knowledge of cloud environments, containerization technologies such as Docker and Kubernetes, automated testing practices, and operating services reliably in production. Main responsibilities Focus on backend development, with responsibility for services, databases, and system integrations. • Develop, improve, and maintain services with a strong focus on reliability, scalability, and long-term maintainability. • Select and use technologies based on problem-solving value, not trendiness. • Ensure that deliveries are on time and secure, always balancing speed with quality. • Collaborate closely with teammates and stakeholders, enabling fast and sustainable delivery. • Over time, take a leading role in driving improvements in both technology and ways of working. Our Tech Stack (key areas for this role) • Java (primary language: deep expertise required) • SQL • REST • Docker, Kubernetes • Azure dev ops About you • Highly experienced in backend Java development and proficient with Azure. • Results-oriented: you deliver what is needed, when it is needed. • Pragmatic: you enjoy new technology but choose what best solves the current problem while limiting technical debt. • Humble and grounded: you listen, collaborate, and keep the team's best in mind. • Independent yet collaborative: you take initiative but thrive in teamwork. • User-focused: the end user's experience is always your guiding star. Qualifications • Extensive experience in Java backend development (main requirement). • Experience with both legacy Java code and modern development practices. • Solid understanding of deploying in Containers • Cyber security in general and PKI experience in particular is beneficial. • Professional proficiency in English.