About this opportunity:
Intermediate data structures can create significant overhead when they are produced only to be immediately consumed. For example, Erlang code may construct a complete list only to convert it into a binary, even though the intermediate list is never observed.
This master's thesis will investigate whether the BEAM compiler and runtime can recognize such cases and avoid allocating the intermediate term. The project will develop a general optimization mechanism rather than relying on hand-written fused operations for individual function combinations.
The work combines compiler analysis, runtime implementation, and empirical evaluation. It is suitable for a student interested in compilers, programming-language implementation, and language runtimes. Both positive and negative experimental results are valuable outcomes of the project.
What you will do:- Design and implement a new BEAM instruction for consuming intermediate terms without fully materializing them.- Add a compiler pass to the BEAM SSA pipeline that identifies suitable producer-consumer patterns.- Build on existing alias and sharing analyses, as well as the compiler's destructive-update optimization.- Compile the Erlang/OTP codebase with the optimization enabled and measure how often it applies and which patterns it targets.- Extend the compiler test suite to verify that the transformation is safe and correct.- Implement the runtime mechanism in the BEAM interpreter to reclaim intermediate heap space while it is being consumed.- Evaluate the performance and memory impact of the optimization.
The skills you bring:- You are currently pursuing your Masters Degree within Computer Science or similar field with an interest in compilers, programming languages, operating systems, or runtime systems- An interest in compilers, programming-language implementation, or language runtimes.- Programming experience and willingness to work with Erlang and C.- An ability to understand and modify an existing compiler and runtime system.- Interest in program analysis, memory management, and performance evaluation.- Familiarity with SSA-based optimization or garbage collection is helpful, but not required.- Careful attention to correctness, testing, and experimental methodology.
Why join Ericsson?At Ericsson, you'll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what's possible. To build solutions never seen before to some of the world's toughest problems. You'll be challenged, but you won't be alone. You'll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.
What happens once you apply? Click Here to find all you need to know about what our typical hiring process looks like.Encouraging a diverse and inclusive organization is core to our values at Ericsson, that's why we champion it in everything we do. We truly believe that by collaborating with people with different experiences we drive innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team. Ericsson is proud to be an Equal Opportunity Employer. learn more.
Primary country and city: Sweden (SE) || Stockholm
Req ID: 792242
Skills Required
- Currently pursuing a master's degree in Computer Science or a similar field
- Interest in compilers, programming-language implementation, operating systems, or runtime systems
- Programming experience and willingness to work with Erlang and C
- Ability to understand and modify an existing compiler and runtime system
- Interest in program analysis, memory management, and performance evaluation
- Careful attention to correctness, testing, and experimental methodology
- Familiarity with SSA-based optimization or garbage collection
What the Team is Saying
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Ericsson Compensation & Benefits Highlights
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Healthcare Strength — Health coverage is described as broad and reliable, with multiple medical plan choices, dental/vision, and mental-health/EAP resources. Available descriptions highlight healthcare and disability insurance as consistent strengths.
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Retirement Support — U.S. materials point to an automatic company 401(k) contribution plus matching that can add up to a notably high employer contribution, and some regions also offer pension options. This structure is often cited as a meaningful component of total rewards.
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Leave & Time Off Breadth — Time-off programs are characterized as generous, with sizable vacation allowances, paid holidays, sick time, volunteer time, and strong parental leave in some locations. PTO is frequently highlighted as a standout element of the package.
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What We Do
Ericsson builds the digital connectivity the world relies on. Our technology underpins the mobile networks, platforms, and systems that billions of people, businesses, and societies depend on every day. We are a global leader in communications technology, delivering mobile network infrastructure, cloud software, and wireless connectivity solutions for service providers and enterprises worldwide. Our networks support connectivity across 180+ countries, helping power everyday communication as well as critical digital services at global scale. Connectivity has evolved far beyond consumer mobile use. Today, nearly 80% of the world’s population accesses the internet via mobile networks, and Ericsson is helping shape what comes next. We are advancing 5G and 5G Advanced, developing network APIs that open connectivity to the global developer ecosystem, and applying automation and AI to make networks more intelligent, efficient, and resilient. Ericsson was the first company to launch live 5G networks on five continents, and our 5G platform is now commercially live in 150+ networks across 60+ countries. We also support more than 36,000 enterprise customers, enabling secure, high-performance connectivity for industries such as manufacturing, aviation, logistics, utilities, and public safety, where reliability and performance are mission critical. Innovation is central to how we work. Ericsson has approximately 28,000 employees in research and development, backed by one of the strongest intellectual property portfolios in the industry with 60,000+ granted patents. Our engineers, researchers, and technologists work across 100+ global R&D sites, helping define how networks evolve and how digital infrastructure is built for the long term. As the world moves toward a mobile-first, AI-powered, and cloud-driven future, connectivity becomes the foundation for digital transformation across every industry. Ericsson is building that foundation, shaping the future of digital connectivity through technology that operates at global scale and supports real-world impact, today and for what comes next.
Why Work With Us
Ericsson is a place for people who want to work on technology that powers everyday life. You’ll contribute to large-scale systems used every day, tackle complex challenges in live environments, and keep developing your skills and career in your own vision.
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