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ServerlessDays Warsaw is a developer-oriented conference about serverless technologies.

We believe that technology is a booster for innovation and one of main goals is to shorten a time-to-market. During the sessions speakers share their experience and lessons from real-world projects.

ServerlessDays Warsaw is part of ServerlessDays (formerly JeffConf), a global series of events around the world fostering communities around serverless technologies.

We follow and enforce the Serverless Days Code of Conduct.


The conference will be hold online on the 3rd of September 2020.


11.00 – 11.10 Opening/Introduction
11.10 – 11.40 James Beswick "5 Reasons Why Companies are Going Serverless" Keynote
11.40 – 12.10 Rich Rose "Workflow tooling with Cloud Run"
12.10 – 12.40 Sheen Brisals "From Oops... to Ops! Sloppy Little Serverless Stories"
12.40 – 13.10 Emrah Samdan "From development to production: the many uses of serverless observability"
13.10 - 13.25 Break
13.25 – 13.55 Yan Cui "A chaos experiment a day, keeping the outage away" Keynote
13.55 – 14.25 Paweł Zubkiewicz "Hybrid serverless – a solution integrated with legacy systems"
14.25 – 14.55 Gunnar Grosch "Continuous verification for serverless applications"
14.55 – 15.25 Ran Ribenzaft "Observability in Serverless applications"
15.25 – 15.55 Wojciech Gawroński "Around the serverless in 180 days"
15.55 – 16.25 Paweł Skrzypek "Autonomous Multi-Cloud serverless deployment and optimized management”
16.25 – 16.55 Karol Junde "Two guys, 1 month, from an idea to a demo product. The story of 106 AWS Lambdas."
17.00 – 17.30 Q&A
17.30 – 17.35 Closing

  1. "5 Reasons Why Companies are Going Serverless" - James Beswick (keynote)

    From startups to large enterprises, companies are quickly adopting serverless architectures to reduce their IT footprint, improve agility and meet the demanding scalability needs for modern workloads. This session looks at the benefits that customers have seen in the 5 years since Lambda was launched, and reviews what developers are building to get the most out of their serverless platforms.

  2. "A chaos experiment a day, keeping the outage away" - Yan Cui (keynote)

    You might have heard about chaos engineering in the context of Netflix and Amazon, and how they kill EC2 servers in production at random to verify that their systems can stay up in the face of infrastructure failures. But did you know that the same ideas can be applied to serverless applications? Yes, despite not having access to the underlying servers, we can still apply principles of chaos engineering to uncover failure modes in our system (and there are plenty!) so we can build defence against them and make our serverless applications more robust and more resilient!

  3. "Hybrid serverless – a solution integrated with legacy systems" - Paweł Zubkiewicz

    We don't always have the opportunity to create applications from scratch. Most systems are legacy and there is nothing wrong about it. These are proven solutions that bring profits to companies every day. Problems start when they need to be extended with new functionalities that we want to implement in modern, cloud-native technologies. In this talk, I will present how to integrate serverless solutions with existing systems. I will tell you what problems we encountered during the implementation and how they can be solved. In summary, I will discuss how the serverless way of building software was perceived by project stakeholders and what value it delivered to the organization.

  4. "From development to production: the many uses of serverless observability" - Emrah Samdan

    Serverless observability is commonly thought of as something useful while running your large serverless applications in production. But, did you know how it can be a valuable tool for dev and test as well? What about small or simple serverless applications? Or, if you're just running a few simple functions? How helpful can observability really be? The answer: VERY! The basics of observability and why it's useful for both known, predictable failures AND unknown, non-predictable failures Why observability is particularly useful for serverless applications How observability is valuable during development and while debugging How observability can be used to test your application How observability is useful in production with both small and large deployments

  5. "Observability in Serverless applications" - Ran Ribenzaft

    Serverless and FaaS naturally fit microservices architectures. Observability of such systems is very complicated, since each microservice is separated and working asynchronously from the others. Distributed tracing is a key approach to understand such systems. In serverless, there are new challenges and opportunities which make distributed tracing a very interesting and useful technique for high observability.

  6. "Workflow tooling with Cloud Run" - Rich Rose

    In the presentation you will learn about Google Cloud serverless patterns and see how Cloud Run can be used to automate common documentation tasks.

  7. "Continuous verification for serverless applications" - Gunnar Grosch

    The transition into more complex systems is accelerating and the granularity in serverless applications makes even smaller systems complex and highly distributed. Chaos engineering draws from the rich history of empirical experimentation to proactively discover vulnerabilities in these complex systems and help us verify whether or not the system behaves as expected under adverse conditions. Join as we raise the bar for how chaos engineering can be used with serverless applications and help us to continuously verify the output of the system through automation and the advantages established by CI/CD.

  8. "Two guys, 1 month, from an idea to a demo product. The story of 106 AWS Lambdas." - Karol Junde

    Just imagine you have an idea which is trying to blow up your head. Let's picture that you've got 1 month to implement it and no available Ops that time to take it on their shoulders the infrastructure part. Moreover, it's just an idea, even if promising, should not burn the budget and be able to scale accordingly to the number of requests since the first minute of its existence. No matter if the idea was born in a division of a huge enterprise or in founders' minds of a new unicorn, the path might be similar. I'll show you my road with an entirely serverless approach.

  9. "From Oops... to Ops! Sloppy Little Serverless Stories" - Sheen Brisals

    Everything fails all the time! A quote repeated by many everyday. How does it feel when things fail in production? How do you recover from such situations? How can you make sure they don't repeat? All these discussed with real production incidents and the measures taken to mitigate such failures. We will also look at few of the most common failure possibilities in a serverless ecosystem. Remember, when everything fails all the time, you must learn something everyday to be operational all the time!

  10. "Around the serverless in 180 days" - Wojciech Gawroński

    History of the ongoing (more than six months in progress) and already successful (two projects already delivered in production, and one in 3 weeks) cloud transformation. The case mentioned above talks about an established company that used AWS like hosting - and now embraces Serverless Architecture more and more - for both new projects and by rearchitecting step by step the existing ones.

  11. "Autonomous Multi-Cloud serverless deployment and optimized management" - Paweł Skrzypek

    The dynamic development of Cloud Computing with the introduction of novel Cloud computing models like serverless creates new challenges for Cloud deployment. This presentation describes how to implement Multi-Cloud native strategies using advanced an open source framework that allows for Cloud-agnostic Multi-Cloud deployment and optimized management of the serverless applications based on flexible monitoring, context aware maximization of the application owner's utility of the deployed serverless components, and autonomic reconfiguration based on the application's current execution context. All stages of the cloud deployment planning and designing process will be shown. Also, the key execution steps will be provided.




Beswick (keynote speaker)

James Beswick is a Senior Developer Advocate for the AWS Serverless Team. James works with AWS's developer customers to understand how serverless technologies can drastically change the way they think about building and running applications at massive scale with minimal administration overhead. He has previously worked as a Software Developer and Product Manager at various enterprises and startups, and has nearly a decade of experience building applications in the cloud.

Cui (keynote speaker)

One of the most respected names in the serverless space. Currently helping organizations around the world accelerate product and feature development by adopting serverless technologies and helping them avoid costly mistakes.


Emrah Şamdan is the VP of Products at Thundra, a tool to provide serverless observability for AWS Lambda environments. With the development team, Emrah is obsessed with helping the serverless community with their debugging and monitoring effort both in production and during development. He is responsible for making trouble for the Thundra engineering team while finding solutions to ease the life of serverless teams.


For the past 14 years, Paweł has delivered software as a developer, business analyst, and an architect. He currently works as an AWS Cloud Architect responsible for several accounts, each containing thousands of resources. Since 2016 he has been passionate about serverless architecture. He proactively builds & reinforces the Polish serverless community on the Serverless Polska website, Serverless Wrocław meetup and various conferences, where he shares his knowledge and expertise.


Ran Ribenzaft is the CTO and Co-founder of Epsagon, an applied observability platform for modern applications. He is an AWS Serverless Hero dedicated to educating and growing the cloud community, especially around observability and microservices. Ran is also an army elite intelligence-unit veteran, with vast experience in network, infrastructure, and cyber-security.


Richard Rose is a Lab Architect at Google Cloud and author of Hands-On Serverless Computing with Google Cloud. His responsibilities include delivery of cloud training assets and evangelising Google Cloud Platform best practices. He he has over 20 years experience in development, infrastructure and security working for tier one organisations across industries. More recently he has fronted the Google Cloud Professional Security training on Coursera.


Gunnar is an evangelist at Opsio and an AWS Serverless Hero. He has previously worked as both a frontend and backend developer, as an operations engineer within cloud infrastructure, and as a technical trainer, in addition to several different management roles. With a focus on building reliable and robust serverless applications, Gunnar has been one of the driving forces in creating techniques and tools for using chaos engineering in serverless. He regularly and passionately speaks at events on these and other serverless topics around the world. Gunnar is also deeply involved in the community by organizing AWS User Groups and Serverless Meetups in the Nordics, as well as being an organizer of ServerlessDays conferences and AWS Community Day Nordics.


Co-Founder and CTO at Chaos Gears. He believes that cloud technology is a main innovation booster. During designing and development process of each serverless case, he strives to simplify and to look for an approach which will save money and the greatest amount of time needed in business continuity and technological race.


Sheen is a seasoned engineer, currently working as a Senior Engineering Manager at The LEGO Group, where he focuses on architecting serverless solutions on AWS cloud. Previously as a principal engineer, tech lead and development manager with leading organizations such as Oracle Corporation, Hewlett-Packard, Omron, TATA, BAe and others. Sheen writes about serverless for the community and is a regular speaker at serverless, AWS and other tech conferences around the world.


is a Co-founder and Cloud Architect at Pattern Match. Passionate Serverless Cloud Architect, an evangelist for the shift-left testing approach, Infrastructure is Code, DevOps culture, and AWS aficionado. Functional programming wrangler (Erlang/Elixir and Clojure). In his free time – bookworm.


Experienced architect of IT solutions, in particular in the field of processing large data sets and machine learning solutions. In the years 2006 - 2015 he co-created the architecture of IT systems solutions for the biggest companies in Poland. In the years 2016-2019 he carried out projects in the area of Cloud Computing and AI and deployed one of the most advanced AI solutions for the investments industry. Technical director of MELODIC multicloud optimization and management platform.


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Code of Conduct

All attendees, speakers, sponsors and volunteers at our conference are required to agree with the following code of conduct. Organisers will enforce this code throughout the event. We are expecting cooperation from all participants to help ensuring a safe environment for everybody.

tl;dr: Jeff says be excellent with each other

The Quick Version

Our conference is dedicated to providing a harassment-free conference experience for everyone, regardless of gender, gender identity and expression, age, sexual orientation, disability, physical appearance, body size, race, or religion (or lack thereof). We do not tolerate harassment of conference participants in any form. Sexual language and imagery is not appropriate for any conference venue, including talks, workshops, parties, Twitter and other online media. Conference participants violating these rules may be sanctioned or expelled from the conference without a refund at the discretion of the conference organisers.

The Less Quick Version

Harassment includes offensive verbal comments related to gender, age, sexual orientation, disability, physical appearance, body size, race, religion, sexual images in public spaces, deliberate intimidation, stalking, following, harassing photography or recording, sustained disruption of talks or other events, inappropriate physical contact, and unwelcome sexual attention.

Participants asked to stop any harassing behavior are expected to comply immediately.

Sponsors are also subject to the anti-harassment policy. In particular, sponsors should not use sexualised images, activities, or other material. Booth staff (including volunteers) should not use sexualised clothing/uniforms/costumes, or otherwise create a sexualised environment.

If a participant engages in harassing behavior, the conference organisers may take any action they deem appropriate, including warning the offender or expulsion from the conference with no refund.

If you are being harassed, notice that someone else is being harassed, or have any other concerns, please contact a member of conference staff immediately. Conference staff can be identified as they’ll be wearing branded t-shirts.

Conference staff will be happy to help participants contact hotel/venue security or local law enforcement, provide escorts, or otherwise assist those experiencing harassment to feel safe for the duration of the conference. We value your attendance.

We expect participants to follow these rules at conference and workshop venues and conference-related social events.


Long road to ruin or to the land of business acceleration

Dialogue driven by business problems, perceived needs and technical solutions with serverless benefits and potential drawbacks.

Sarah Lucas
Head of Platforms and Infrastructure at William Hill

Setting of business problems to tee up potential serverless solutions

Saumitra Ganguly
Senior Area Business Development Manager at Amazon Web Services

AWS Serverless Expert highlighting AWS solutions that could resolve the business problems

Dariusz Parzygnat
Senior .Net Developer at Ceneo, Founder of Serverless Wroclaw Meetup, "Serverless on platform Azure" book author

High-flyer who is fascinated by a self-documenting code and the idea of a clean code. Associated with C# and technologies that are connected with that language. Azure fan and enthusiast of serverless world. Open to new challenges.

Bill Salak
CTO at Brainly

Bill Salak has more than 15 years of experience overseeing large-scale development projects and has more than 20 years of experience in web application architecture and development. Bill founded and served as CTO of multiple Internet and web development companies, leading technology projects for companies including Age of Learning, AOL, Educational Testing Systems, Film LA, Hasbro, HBO, Highlights for Children, NBC-Universal, and the U.S. Army. Bill currently serves as the CTO of Brainly, the world's largest educational community with over 200 million monthly unique users.