About us: Digimondo (founded 2016, based in Hamburg) builds IoT software that helps cities, utilities, and enterprises become more efficient, sustainable, and digital. Over 100 customers across Germany and Europe use our solutions in Smart City, Smart Energy, Smart Building, and Smart Industry contexts. We’re a founder-led team of ~25 people, backed by major energy-sector shareholders, combining startup spirit with the stability and scale of an established company. Our values: fairness, passion, customer focus, quality, diversity. We’re growing strongly in the DACH region and internationally.
We are hiring (Germany, Hamburg preferred):
System Administrator – On-Prem Software Deployment & Support (m/w/d)
Cloud Infrastructure Engineer (m/w/d)
Senior Backend Software Engineer (m/w/d)
Senior Backend Software Engineer – Node.js (Hamburg/Remote) (m/w/d)
Software Engineer IoT – Vue.js (m/w/d)
Senior Backend Software Engineer – Kotlin (m/w/d)
What we offer:
Work on real-world IoT infrastructure used by utilities, cities, and industrial customers
Small, highly technical team with ownership and autonomy
Modern tech stack across cloud, backend, and IoT application layers
Apply here: https://www.digimondo.com/en/careers
High performance, polyglot, AI-native runtime. We are in San Francisco, but work remote. Kotlin and Rust.
Screen-time app that makes you do push-ups before you can scroll addictive apps. 350k+ users.
Looking for someone strong in Kotlin Multiplatform + Compose Multiplatform + Swift/SwiftUI who isn't afraid of platform-specific APIs (Screen Time on iOS, Accessibility/UsageStats on Android) and can ship very fast.
Stack: Supabase (auth/DB/edge functions), Superwall, Amplitude, MediaPipe for pose detection. Good design sense matters - you'll be translating Figma → production UI.
Small team, work directly with founders. It’s a long-term role in an exciting app (help us fight doomscrolling!) where you can have a lot of impact. Reach out: contact@pushscroll.com
Pliant is rethinking corporate credit cards. Since 2020, we’ve been empowering companies to scale with modern virtual and physical card issuing, automated payment flows, real-time spend tracking, and a clean API that plugs directly into their finance stack.
Our tech stack: Java/Kotlin, Spring Boot 3, Postgres, Kafka, AWS, Terraform.
Our culture: low-ego, no-bullshit, high-ownership. Empowered product teams working closely with strong PMs. Pragmatic, impact-driven engineering. “Getting sh*t done” mindset encouraged.
If this sounds like your kind of place, reach out directly to me (Head of Engineering): rajat.parida@getpliant.com
or apply here: https://www.getpliant.com/en/careers/
Musa is a mobile app helping women understand their hormonal health through a cycle tracker with personalization and a small companion character. Thousands use it daily.
We’re a small team, ship fast, and follow a Shape Up-style process. Low meetings, high ownership.
You will - Own our iOS and Android apps
- Shape and build features end to end
- Ship often to a user base that shares the product organically
- Tackle challenges in personalization (AI), performance and UI delight
You
- Enjoy building and care about quality
- Like autonomy and product thinking
- Have strong Swift/Kotlin experience
Links Role: https://www.notion.so/Mobile-Senior-Software-Engineer-L5-2b1...
App: https://apps.apple.com/us/app/musa-period-self-care-pet/id65...
Chat: german at musa.com
AI Innovator: Prototype and ship production AI features fast; extend our multi-agent orchestration; design private/sovereign data pipelines and dynamic indexing; collaborate tightly with founders to turn research into product.
Principal SWE: Own core platform architecture; design and scale distributed backends/APIs; build great DX (SDKs/CLI); lead reviews/mentorship; drive 0→1 projects with strong reliability and observability.
You might be a fit if you have
A track record taking systems from concept to scale and to revenue.
Deep backend/systems skill (Go/Rust/Kotlin or similar); strong CI/CD/testing discipline.
Experience with distributed, real-time data infra; privacy/security minded.
Hands-on AI product chops (CV, NLP, LLMs/agents) and bias to build/iterate quickly.
Clear communication, product intuition, and comfort working directly with founders.
Apply via the role links above.
Spruce lets users control their data across the web. Instead of users logging into platforms, we believe platforms should request to access data vaults controlled by users.
The demand for trusted digital ID is accelerating as AI deepfakes begin to destroy most of the ways we use to verify identity today. How private or secure is it to hold your driver's license or passport up to a webcam to get a bank account? Was it ever private or secure? Stable diffusion can break so much of this already. Society will need trusted digital IDs and credentials. Our mission is to allow them to be controlled by individuals, with safeguards to prevent descents into surveillance states and checkpoint societies.
We are the main implementers of category-defining initiatives such as the digital ID program for the California DMV, and the verifiable digital credentials program in Utah. We are private sector participants in NIST's National Cyber Security of Excellence initiative for privacy-preserving digital ID.
We are hiring skilled engineers who care about making a real impact in improving public services, digital autonomy, and user privacy for the world. We work closely with public sector agencies, and have high regard for public servants. We have a strong engineering and customer-oriented culture, and are not simply a SaaS product or AI wrapper. Our roles are not for the faint of heart: you will be expected to work hard and learn a lot in this role.
Our engineers are ambitious to get outcomes for our customers and their constituents. On any given day, they may write great Rust/C#/TypeScript, deal with mainframe dumps, read policy documents, respond to technical RFIs/RFPs, manage on-prem environments, implement new NFC + Bluetooth protocols in Swift/Kotlin, create CI/CD processes that enforce W3C accessibility guidelines and i18n requirements, rewrite lost specs from disassembled binaries, figure out stablecoin payments, and design new protections for public key infrastructure. It is a team effort, and people with T-shirt shaped skills are able to collaborate and learn a ton from each other every day.
We are interested in candidates who want to be proud of the meaningful impact they make for society, even if it takes time to get right. This is not the right job for someone who wants to "join a cool new AI startup" that implodes or exits in under a year.
See our roles here: https://jobs.lever.co/sprucesystems/
Starbridge is building an AI platform that turns large-scale public and enterprise data into reliable sales insights. We are early, moving fast, and building from zero to one, so this role will have huge ownership and product impact.
Backend Engineer: (looking for Kotlin/Java/Scala experience). You'll work across the backend: building enterprise integrations, large-scale scraping and parsing pipelines, and systems that let users apply LLMs to millions of documents to generate insights at scale.
Product Engineer: (React/Typescript) who would work closely with product and design to build user-facing parts of the platform. You will craft performant, stable frontends that explain technical concepts to non-technical users and help us iterate fast based on customer feedback.
AI Engineer: Applied AI plus strong software engineering. You will build, evaluate, and deploy LLM-driven features like deep document analysis and interactive chat, working with models from OpenAI, Anthropic, and Gemini. Expect hands-on Python, ML system design, experimentation, and production reliability. Bonus for RAG depth and frameworks like LangChain, LlamaIndex, or Hugging Face.
We're looking to build our in-person team in NYC but also open to remote!
Apply: https://starbridge.ai/careers and mention HackerNews or email melissa@starbridge.ai with your resume.