LocalStack - the Local Cloud Sandbox for Developers and AI Agents

We are a fast-growing Series A startup building cutting-edge technology to revolutionize cloud development processes and support highly efficient dev&test feedback loops. We’ve closed our last $25mil round in Q4 2024, led by Notable Capital, CRV and Heavybit.

LocalStack is a local cloud development platform. LocalStack makes it easier, faster, and less expensive for software teams to ship reliable, high-quality applications to the cloud.

The cloud was built to run software, not to support AI-native development workflows. As the world's leading local cloud development platform, LocalStack provides secure local sandboxes that simulate cloud environments, enabling AI agents and software developers to find and fix risks faster and more effectively than they can in the cloud.

Our customer base ranges from SMBs to Global Fortune 500 companies. Our clients include companies like NASA, Harness, IBM, Workday, Comcast, Apple, 3M, Block and many more.

We are sustainably growing our globally distributed teams across GTM, operations and engineering. In 2025 we almost doubled in size and continue to grow across all areas in 2026.

LocalStack is headquartered in Zurich/Switzerland 🇨🇭, with a small engineering office in Vienna/Austria 🇦🇹 and remote team members from 25 countries including 🇺🇸the US, 🇫🇷FR, 🇬🇧UK, 🇨🇦CA, 🇪🇸ES, and many more!

👉Check our Notion Candidate Handbook and our GitHub!

✅ What you will be working on/responsible for

Develop AI pillar in our core product offering, commercialising opportunity
Lead the product roadmap in collaboration and with input from leadership team, keeping finger on the pulse of the market
Grow usage and stickiness of existing LS product suite: AWS, Snowflake and Azure emulators
Expand the product suite: introduce, position and grow new products in the cloud platform and auxiliary devX tooling space
Create a thriving platform and ecosystem, positioning LS as the leader in the space

✅ Experience we expect you to bring to the role

Experience in the devtooling, devX, cloud infrastructure or similar space, working with engineers as core users
Affinity with AI and hands on experience building AI native solutions
Experience leading a product team, while still maintaining hands on approach
Background in software engineering

🌱 Values we hold in LocalStack

Care: we create with compassion. We prioritize empathy and understanding in every interaction. By genuinely caring for our team, customers, and community, we create an environment where people thrive and impactful work flourishes
Ownership: we own the outcome. We take responsibility for our work and are passionate about its impact. We foster autonomy, inspire ambition, encourage ownership, and empower everyone to unlock their potential and make an impact.
Openness: we build trust together. We build trust through open communication and honest feedback. By sharing ideas and embracing diverse perspectives, we create stronger, more connected teams that work toward shared goals.
Courage: we dare to innovate. We embrace bold challenges and take calculated risks to move the needle. We step outside our comfort zones, experiment fearlessly, and turn setbacks into springboards for growth.
Excellence: we chase the extraordinary. We chase excellence by pushing boundaries and delivering results that go beyond the ordinary, constantly raising the bar and striving for greatness in everything we do. Excellence is not just the outcome, itʼs how we approach every task with purpose, passion, and a commitment to delivering exceptional value.

🎁 Benefits

Fully remote
Competitive salary
Unlimited PTO
401k and private medical
Annual company retreat
2 extra company-wide holidays
Friendly and inclusive workplace culture (community guilds and online company events)

Sounds like a good match?

We'd love to hear from you! Join us in shaping the future of cloud development at LocalStack.

To apply, follow the application process. Make sure to include a short motivation outlining why you are the perfect candidate for this role.

If your profile looks like a good match, our talent team will be in touch to organize further steps within 2 weeks.

Please note, that due to a high volume of candidates, we cannot offer personalized feedback to each candidate.

About the company

LocalStack provides a cloud service emulator that lets developers run a full AWS environment on their own machines. It works by emulating more than 100 AWS services locally (often via Docker), so developers can build, test, and validate cloud apps offline, including infrastructure as code, CI/CD workflows, and serverless configurations. It differentiates itself through its open-source heritage, broad service coverage, and a strong focus on developer productivity and local testing, enabling faster iterations and reduced cloud costs. Its goal is to speed up cloud development, lower cloud spend, and broaden testing capabilities, with plans to extend emulation to other clouds like Snowflake and Azure.

Company Size

51-200

Company Stage

Series A

Total Funding

$25M

Headquarters

Zurich, Switzerland

Founded

2021

Get referred to LocalStack

See people who can refer or advise you

Simplify's Take

What believers are saying

September 14, 2026 WonderTwin acquisition expands LocalStack into GitHub, HubSpot, PostHog, and Stripe emulation.
April 29, 2026 App Inspector and June 2026 AI-agent tools target exploding AI-code validation demand.
LocalStack claimed 1,500 customers and $25 million Series A backing from Notable Capital, CRV, Heavybit.

What critics are saying

March 2026 community-edition sunset alienated open-source users and pushed them toward Floci alternatives.
AWS can close parity gaps faster; every service release weakens LocalStack's differentiation within months.
If AI-agent testing shifts to hyperscaler-native sandboxes, LocalStack becomes a niche AWS-only utility.

What makes LocalStack unique

LocalStack emulates 100-plus AWS services locally, including Step Functions, IAM, and App Inspector.
June 2026 AI-agent blueprint and September 2026 WonderTwin acquisition extend emulation beyond AWS.
LocalStack runs on self-hosted containers, supporting air-gapped teams and offline testing workflows.

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Benefits

Remote Work Options
Unlimited Paid Time Off
Paid Holidays
Company Social Events

Growth & Insights and Company News

Headcount

6 month growth

1 year growth

2 year growth

Associated Press

Oct 13th, 2026

LocalStack adds day-one support for AWS Lambda Web Functions in local sandboxes

LocalStack, a Zurich-based local cloud development company, has added support for AWS Lambda Web Functions, which AWS released on October 12, 2026. Developers and AI agents can now test serverless web applications in a local sandbox from the first day the feature is available. Traditional serverless functions process events one at a time. Web Functions run as standard HTTP servers, and each environment handles many requests at once. Teams can use familiar frameworks and stop paying for CPU while an app waits on databases or AI models. Support is available today to LocalStack for AWS customers. LocalStack will hold a webinar with the AWS Lambda team on October 22.

TMCnet

Oct 13th, 2026

LocalStack Adds Support for AWS Lambda Web Functions in Local AWS Sandbox Environments

LocalStack Adds Support for AWS Lambda Web Functions in Local AWS Sandbox Environments TMCnet News [October 13, 2026] | / | LocalStack Adds Support for AWS Lambda Web Functions in Local AWS Sandbox Environments ZURICH, Oct. 13, 2026 (GLOBE NEWSWIRE) - LocalStack, the market leader in local cloud development, today announced that it has added support for the new AWS Lambda Web Functions which was released yesterday to streamline development of high-performing serverless web applications on AWS. Now with LocalStack for AWS, developers and AI agents can experiment with advanced serverless applications in a local development environment from the first day the feature is available on AWS. "Serverless applications have always been such a strong fit for local cloud development. Introducing Day-1 support for AWS Lambda Web Functions was a no-brainer for us," said Waldemar Hummer, co-founder and CTO of LocalStack. "It's always encouraging to watch our community evolve from experimenting with these new features locally to building repeatable development workflows based on the local environment. We're excited to see where the community takes this feature." Traditional serverless functions process events one at a time. Running a web app on serverless functions has required adding adapters, accepting slowdowns when traffic spiked and paying for time spent waiting on databases or AI models. AWS Lambda Web Functions remove those trade-offs. They run as standard HTTP servers that listen on a port, and each environment handles many requests at once so apps stay fast when traffic spikes. Teams can use the frameworks they already know and stop paying for CPU while the app waits. LocalStack provides the industry-leading local cloud development platform for AWS applications. By simulating how AWS services behave in a local container, LocalStackfor AWS enables software developers and AI agents to identify and fix bugs, security risks and other issues faster and more effectively than they can when building in cloud development environments. Support for AWS Lambda Web Functions is available to LocalStack for AWS customers today. This provides the AWS developer community a secure, isolated sandbox to experiment and test the feature in an experience that makes it easier to reproduce production conditions, surface bugs and validate code updates. LocalStack will present alongside the AWS Lambda team for an introductory webinar to show how AWS Lambda Web Functions can improve application performance and walk through next steps to test those applications locally via LocalStack on October 22: https://www.localstack.cloud/events/introducing-aws-lambda-web-functions-deep-dive-with-aws?utm_source=pr About LocalStack LocalStack's mission is to make cloud software development easier, faster and more impactful by unlocking the benefits of local infrastructure for cloud-based application environments. With more than 1,500 customers and hundreds of millions of Docker pulls, LocalStack has become the de facto standard for local cloud development worldwide. LocalStack is remote-first and backed by Notable Capital. For more information, please visit https://www.localstack.cloud/. Media and Analyst Contact: Amber Rowland [email protected] +1-650-814-4560 [ Back To TMCnet.com's Homepage] |

Yahoo Finance

Sep 14th, 2026

LocalStack acquires WonderTown AI to enable local testing of cloud integrations for developers and AI agents

LocalStack has acquired WonderTwin AI, a provider of local application emulators for services including GitHub, HubSpot, PostHog and Stripe. The deal addresses bottlenecks in AI-native software development, where shared sandbox environments struggle to support the scale and concurrency required when AI agents build code. WonderTwin AI's emulators simulate third-party applications on local infrastructure, allowing developers and AI agents to test integrations without connecting to live APIs. LocalStack already provides local cloud development platforms that simulate AWS and Snowflake behaviour. The combined offering will enable AI-native software engineers to validate entire application stacks locally, avoiding the complexity and risks of connecting to live production services. WonderTwin AI founder Tela Andrews said AI agents had "completely broken" traditional SaaS testing environments, making emulation necessary.

GlobeNewswire

Sep 14th, 2026

LocalStack Acquires WonderTwin AI to Let Developers and AI Agents Build Integrations Locally

WonderTwin AI’s Local Emulators Make It Possible to Test Integrations Without the Risks, Restrictions and Costs Associated With Developing Against Live...

Goldin Digital Publishing Inc.

Jun 11th, 2026

LocalStack Releases Blueprint for AI Agents

LocalStack releases blueprint for AI agents. June 11, 2026 LocalStack released a blueprint enabling AI agents to operate LocalStack's local cloud sandbox environments for testing and validating production application behavior without requiring access to provision live cloud infrastructure. "Testing and validating cloud behavior is rapidly becoming the bottleneck in AI-assisted software development," said Waldemar Hummer, co-founder and CTO of LocalStack. "As AI agents generate more code, they also create greater demand for efficient and reliable testing. By removing cloud dependencies from this stage of the workflow, software teams can unlock faster feedback cycles, lower costs and greater scalability. This release makes it easier for our community to extend the benefits of local cloud development to the AI agents supporting their pipelines today." LocalStack simulates the public cloud environment in a lightweight container that runs on the customer's self-hosted infrastructure so agents can validate how the application will behave in production without deploying to the cloud. In addition to removing the delays, costs and security risks of running ephemeral dev and test environments in the cloud, the containerized nature of the environment makes it easier to surface defects and streamline debugging tasks. With the new blueprint, agents can leverage their existing application code and Infrastructure-as-Code resources to deploy dev and test environments locally and take advantage of LocalStack's advanced capabilities for testing and debugging applications. Activities agents can perform include: - Provisioning environments to the local container so agents can test and validate application behavior in a production-like environment without access to a cloud account - Running AWS CLI commands against the local container to push code updates as the agent would in a cloud environment - Snapshotting, saving and restoring the state of the local environment so agents can reproduce specific environment conditions for testing, debugging and continuity - Generating, testing and reviewing failed IAM policies in the local environment leveraging LocalStack's proprietary security testing features - Inspecting application traces, spans, events, and IAM evaluations to surface bugs that emerge as a result of interactions between AWS services in the application environment - Simulating outages, faults and other disruptions to test application resiliency in an offline environment Industry news. June 11, 2026 GitLab(link is external) announced new capabilities at GitLab Transcend to give engineering teams the infrastructure, context, and controls to run agent-driven software delivery at enterprise scale. June 11, 2026 The Linux Foundation, the nonprofit organization enabling mass innovation through open source, announced the launch of the OpenSharing Project, an open, vendor-neutral protocol designed to standardize how organizations share AI assets and data. June 11, 2026 LocalStack released a blueprint enabling AI agents to operate LocalStack's local cloud sandbox environments for testing and validating production application behavior without requiring access to provision live cloud infrastructure. June 11, 2026 RapidFort announced the availability of RapidFort Curated Libraries, a comprehensive catalog of malware-scanned open-source libraries to help organizations prevent supply chain malware before it reaches development pipelines or production environments. June 10, 2026 GitLab(link is external) announced a managed GitLab offering on Google Cloud, delivered by GitLab-certified managed service providers, enabling secure and sovereign deployments for enterprises. June 10, 2026 JFrog unveiled its JFrog Platform plugin for Claude Code, in collaboration with Anthropic. June 10, 2026 Comet announced coding agent cost tracking in Opik, its AI observability and evaluation platform - giving engineering leaders answers their bills can't. Per engineer, per team, per task. In real time, before the invoice arrives. June 09, 2026 BrowserStack has announced a strategic partnership with Nagarro to co-develop test automation solutions for enterprises. June 09, 2026 Rubrik announced Rubrik Agent Cloud (RAC) for Anthropic's Claude Code and Claude Cowork. June 09, 2026 Invicti Security announced the launch of Invicti AppSec Core, an all-in-one application security platform. June 08, 2026 Elastic introduced an agentic Kubernetes investigation workflow and MCP-based observability skills that diagnose incidents the moment an alert fires. June 08, 2026 New Relic announced development of a new open-source feature called New Relic AI Coding Observability, an observability solution designed specifically for AI-assisted software development. June 08, 2026 Kong announced Kong Ascent, a new AI-assisted migration offering designed to help enterprises make their APIs AI-ready. June 04, 2026 GitLab(link is external) announced GitLab Transcend(link is external), a hybrid event for technology and engineering leaders taking place June 10-11, 2026. June 03, 2026 Google DeepMind just launched Gemma 4 12B, its latest open model that shrinks highly advanced, multimodal AI down so developers can run it natively on a standard laptop.

LocalStack

Head of Product

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