Junior Software Developer
About the job
- Experience or interest in working with AWS, including Amazon ECS and PostgreSQL.
- Experience or interest in working with Datadog and Sentry for infrastructure monitoring and error tracking.
- Experience or interest in TypeScript, Node.js, NestJS, and Ruby on Rails.
- Familiarity with Notion, Slack, Jira, and GitHub.
- Work with the company's integration platform and unified application programming interface to build and maintain software integrations.
- Develop or contribute to features that enrich and standardize application programming interfaces, including filters and webhooks.
- Help maintain secure and privacy-conscious software supporting data residency and GDPR compliance.
About the company
StackOne provides a unified API platform that helps businesses connect multiple software tools and systems, especially for HR, CRM, and marketing. It offers a single API that handles many integrations—such as HaileyHR, BreatheHR, HR Cloud, Pipedrive, Greenhouse, and Klaviyo—so companies can link different tools without managing multiple connections. The API works by acting as a central gateway for data and commands; customers send requests to StackOne, which routes them to the appropriate software and returns results, all under secure authentication and consistent data formats. StackOne differentiates itself by offering a broad set of integrations through one API, reducing integration complexity and security concerns for users compared with managing separate connections. Its goal is to save customers time and resources by enabling fast, secure, and scalable software integrations through a single subscription or usage-based pricing model.
Company Size
51-200
Company Stage
Series A
Total Funding
$23.6M
Headquarters
London, United Kingdom
Founded
2023
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Simplify's Take
What believers are saying
- GV led StackOne's $20 million Series A on May 6, 2025, funding expansion.
- StackOne claims 100k+ evals and 78% average tokens saved on its September 2026 site.
- Continuous connector shipping and MCP/A2A support widen adoption among AI-agent builders.
What critics are saying
- Merge, Workato, and MuleSoft compress pricing as connector commoditization accelerates by 2027.
- Prompt-injection or token-lifecycle failures on StackOne Hub trigger enterprise security reviews immediately.
- A major platform outage sends AI-agent builders back to direct API integrations.
What makes StackOne unique
- StackOne spans 510+ connectors and 31,000+ actions across AI clients.
- Its Documents API unifies Notion, Confluence, Google Drive, SharePoint, and OneDrive access.
- Built-in prompt-injection defense and StackOne Hub simplify secure, real-time agent connections.
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Benefits
- Health Insurance
- Dental Insurance
- Vision Insurance
- Private health insurance
- Health, fitness and gift card discounts
- Cycle2Work and Electric Cars scheme
- Hybrid Work Options
- Unlimited Paid Time Off
- Flexible Work Hours
- Remote Work Options
- Paid Vacation
- Paid Holidays