Jonatan.Sirak
Open to Remote roles · EMEA timezone

Jonatan Sirak

I'm hiring a

Technical Scrum Master and Software Designer with 9 years across telecom and automotive. At Ericsson I turned an underperforming team into a high-output unit: 40% velocity up, 30% faster delivery, 50% fewer bugs. Backed by hands-on experience in C++, CI/CD and DevOps. Open to remote Scrum Master and developer roles within EMEA.

I deliver measurable outcomes, not ceremony checklists. At Ericsson (2020-2021) I took an underperforming team to 40% higher velocity, 30% faster delivery and 50% fewer production bugs within a single engagement. My C++ and DevOps background means I can remove blockers that pure Scrum Masters cannot even see.

Over 7 years building in C++ and DevOps: core 5G features at Ericsson, CI/CD pipelines supporting 1,000+ developers, Git/Gerrit migrations from legacy systems. I have also led teams as Scrum Master, so I write code with a delivery mindset, clean, stable, and easy for the next engineer to ship.

+40% Sprint velocity
+30% Delivery speed
-50% Production bugs
7+ yrs C++ & DevOps
1,000+ Devs supported
5G Telecom systems
Contact me View experience
Remote first EMEA hours Scrum Master & Developer
About

Who I am

Portrait of Jonatan Sirak

I'm a technical Scrum Master with a software and DevOps background who cares more about measurable outcomes than ceremonies. Over the past nine years I've worked in software development and delivery, and in the last three and a half years I've focused on leading agile teams, improving flow and removing blockers so they can ship reliably.


During my Scrum Master engagement at Ericsson (2020-2021) I helped a cross-functional team increase sprint velocity by around 40%, speed up delivery by 30% and cut production bugs by 50%. My engineering experience in C++, CI/CD and DevOps tooling means I can dive into technical discussions, understand constraints and help teams make practical decisions instead of staying at a buzzword level.


I hold a BSc in Systems Science from the University of Gothenburg and have worked in large-scale environments where stability, predictability and clear communication matter. I'm comfortable coaching developers, partnering with Product Owners and using data (cycle time, throughput, defects) to guide improvements.


Living in China and studying Chinese at Sichuan University for over two years has strengthened my communication skills, adaptability and patience. Working and studying in a different culture has made me good at listening first, adjusting quickly and keeping a calm, steady presence even when things change fast.


Outside of my main roles I founded Pamoja Imports, where I designed and built the website and the underlying processes that connect African SMEs with Chinese suppliers. That work has sharpened my product thinking, process design and ability to coordinate remote collaboration across time zones.


I'm currently open to remote opportunities within EMEA, both as a technical Scrum Master and in software-focused roles where my engineering background and delivery experience can contribute directly to building stable, scalable systems.

I'm a Scrum Master with a strong engineering background who focuses on outcomes, not ceremony checklists. Over the last three and a half years I've led agile teams in large organisations, helping them improve velocity, delivery predictability and quality through practical changes to how they plan, collaborate and ship.


At Ericsson (2020-2021) I supported a cross-functional team to increase sprint velocity by ~40%, speed up delivery by 30% and reduce production bugs by 50%. I use data such as cycle time, throughput and defect trends to guide improvements while keeping the conversation grounded and understandable for both developers and stakeholders.


Because I've worked as a C++ Software Designer and in DevOps/CI/CD, I can participate in technical discussions without losing the thread. That makes it easier for me to remove blockers, manage dependencies and translate between business priorities and technical constraints. I try to be a calm, steady presence who helps the team focus on what actually moves the product forward.

I'm a Software Designer and DevOps-oriented developer with over 7 years of experience in large telecom environments. I've worked on core 5G functionality in C++, maintained CI/CD pipelines used by 1,000+ developers and helped migrate legacy codebases and workflows to modern Git/Gerrit setups.


My focus is on building reliable systems and making it easier for engineering teams to deliver. That has meant automating builds and tests, improving branching and review flows, and creating internal tools that reduce manual work and speed up onboarding. I care about clean code, clear interfaces and stable releases.


Alongside my engineering roles I've also worked as a Scrum Master, which has strengthened my understanding of how teams actually work day to day. It means I approach technical work with an eye for flow and collaboration, not just code. I'm comfortable moving between deep technical work and cross-team problem solving.

Experience

Professional experience

Scrum Master at Volvo Cars

Scrum Master 1 yr 3 mo

Jan 2022 – Mar 2023 · Remote · Software Factory

  • Facilitated sprint planning, daily stand-ups, reviews and retrospectives, creating alignment across the Software Factory teams.
  • Helped establish new working methods for a newly formed DevOps department, improving collaboration across development, testing and operations.
  • Led a developer well-being and engagement initiative, strengthening communication, team cohesion and psychological safety.
  • Supported adoption of SAFe-aligned practices and contributed to continuous improvement within the organisation.
Scrum Agile Project Management SAFe 5 Coaching Facilitation Jira Servant Leadership

Scrum Master at Ericsson

Scrum Master 1 yr 5 mo

Jun 2020 – Oct 2021 · Remote

  • Coached a development team from underperforming to high performing, achieving a 40% increase in sprint velocity.
  • Improved delivery predictability by 30% by removing blockers, managing dependencies and tightening flow from planning to release.
  • Reduced production bugs by 50% through stronger acceptance criteria, improved testing discipline and clearer working agreements.
  • Strengthened collaboration between teams, enabling smoother handovers and clearer communication on technical dependencies.
  • Partnered with product leadership on scope and delivery planning, improving transparency and decision-making.
Agile Methodologies Kanban Team Leadership Communication Retrospectives Servant Leadership Negotiation

Software Designer at Ericsson

Software Designer 2 yrs 2 mo

Sep 2019 – Oct 2021 · Gothenburg

  • Designed and implemented core functionality in large-scale 5G C++ systems, ensuring high performance and reliability.
  • Collaborated with architects and senior engineers to refine designs, clarify requirements and break down complex features.
  • Improved maintainability of legacy components by refactoring code, reducing technical debt and aligning with modern coding standards.
  • Worked closely with verification teams to support testing, troubleshoot defects and ensure stable, testable releases.
  • Documented design decisions, risks and implementation details to maintain traceability across the release cycle.
C++ Object-Oriented Design Git Gerrit UML Python Agile Methodologies

DevOps Software Designer at Ericsson

DevOps Designer 4 yrs 8 mo

Feb 2014 – Sep 2018 · Gothenburg

  • Automated CI/CD pipelines with Jenkins, improving build and deployment flow for large engineering teams.
  • Migrated codebases from ClearCase to Git and introduced new code review routines using Gerrit.
  • Built internal developer productivity tools that reduced manual work and improved onboarding.
  • Supported more than 1,000 developers with reliable build, test and integration infrastructure.
CI/CD Jenkins Git Gerrit Python Shell Scripting Agile Methodologies

Scrum Master at Ericsson

Scrum Master 6 mo

Jun 2014 – Nov 2014 · Gothenburg

  • Kept the team focused and productive with clear ceremonies and quick blocker removal.
  • Supported introduction of Agile principles for new team members which improved collaboration.
  • Helped streamline communication flow between developers and product owners.
Scrum Coaching Retrospectives Facilitation Communication
Projects

Pamoja Imports

Founder, Pamoja Imports

Digital import partner for African SMEs

What I do

  • Designed and built pamojaimports.com, including site structure and customer flows.
  • Created end-to-end processes for product sourcing, supplier communication, quoting, shipping and delivery.
  • Act as product owner: define requirements, iterate on UX and keep the service clear and predictable for SMEs.
Product & Process Design
Translating a business idea into a working digital service with clear workflows.
Cross-Cultural Collaboration
Coordinating suppliers in China and customers in Africa with transparent communication.
Operational Efficiency
Building lean, repeatable processes so orders can move from request to delivery without drama.
Visit pamojaimports.com
Skills

Core skills

Agile delivery

  • Scrum, Kanban, team coaching and facilitation
  • Improving velocity, delivery speed and product quality through data-driven practices
  • Backlog shaping, sprint planning, stakeholder alignment and cross-team collaboration
  • Retrospectives that produce measurable, lasting improvements

Software development

  • C++ foundations, debugging, clean code and maintainability
  • Working with large telecom codebases and complex distributed systems
  • Code reviews, test mindset and release documentation
  • Understanding constraints across architecture, testing and infrastructure

DevOps & tooling

  • CI/CD pipelines used by 1,000+ developers (Jenkins, automation, quality gates)
  • Git & Gerrit workflows, branching strategies and migration from legacy systems
  • Developer experience tooling to reduce friction and speed up onboarding
  • Jira & Confluence for tracking, reporting and structured documentation
Availability

Available Now · Remote only · EMEA timezone

Let's connect

Open to remote full-time or contract roles. Fastest responses via LinkedIn, or reach me directly by email.

Message on LinkedIn Email me

Fast facts

  • Available now, remote only, EMEA hours
  • Open to Scrum Master and developer roles
  • 9 years in software, 3.5 years as Scrum Master
  • C++, Git, Gerrit, Jenkins CI/CD
  • Jira & Confluence for project tracking
  • Telecom & automotive (Ericsson, Volvo)
  • Chinese studies at Sichuan University