Musa — Mobile Engineer (iOS/Android) — Remote (Americas)

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

Source (https://source.network)| USA/Canada: REMOTE | Full-Time | https://careers.source.network

Our mission is to make it normal, not heroic, for edge AI, mobile apps, and critical software to run close to where data is born: on devices, in vehicles, in field hardware, not just in a distant GPU farm. We’re building the data and trust layer that lets developers ship systems that still behave correctly when links are flaky, latency is awful, and the cloud is optional instead of mandatory—instead of the usual “SQLite everywhere + ad-hoc sync” duct tape.

We’re growing fast and are looking to fill the following positions:

-Chief of Staff - https://source.network/careers/chief-of-staff

-Lead Edge AI Engineer - https://source.network/careers/lead-edge-ai-engineer

-Head of Developer Relations - https://source.network/careers/head-of-developer-relations-r...

-Lead Technical Writer & Documentation Engineer - https://source.network/careers/lead-technical-writer--docume...

Rootly | AI-native on-call & incident response (Slack/Teams) | REMOTE (US/Canada/Europe); optional hubs SF & Toronto

We build the end-to-end platform that helps SRE/eng teams detect, manage, and learn from incidents faster—trusted by 1000+ companies (logos include Glean, Mistral, Figma, LinkedIn, Dropbox, Replit, Grammarly, etc.).

Roles:

- AI Engineer

- Senior Security Engineer

- Senior Site Reliability Engineer

- Senior Product Engineer

- Senior Product Manager

- Technical Product Marketing Manager

- Implementation Engineer

- Product Engineer Co-op

- Principal Product Designer

- Customer Success Manager

- Mid-Market Account Executive

- Enterprise Account Executive

Why Rootly: small, senior team; real adoption; lots of ownership and impact; AI-native workflows; customers across startup → enterprise.

Norm is building AI that understands regulations for regulatory compliance. Our AI currently automates compliance determinations for federally regulated financial content, though our vision is to build a platform that can handle any regulation in any industry. As AI begins to permeate our society, Norm aims to become a critical building block for other AI systems that need regulatory intelligence. You can read more about our vision here: https://www.norm.ai/post/building-regulatory-ai-agents

We've raised $137m from top-tier investors to pursue this vision. We're growing very quickly and have major, household-name financial institutions as clients and investors. We're working on hard, interesting problems and want to push the boundaries of what's possible for AI-driven products. We're hiring for many engineering roles in NYC and SF, including:

- Full Stack Engineer, Senior + Staff ($190k-270k)

- Applied AI Engineer ($200k-275k)

- Cloud Infrastructure Engineer ($175k-250k)

- Forward Deployed Engineer ($190k-250k)

We're also hiring for many non-technical roles. The best way to apply is online on our website (we review every application!). Full list here: https://jobs.ashbyhq.com/norm-ai?utm_source=7ow8wn5o3g.

Val Town | https://val.town | NYC | Full time | ONSITE

Do you love programming? Do you love developers tools?

Consider working at Val Town. We're a small startup (currently three people) building a developer tool that makes programming as simple and fun as possible.

https://www.val.town/careers

Kombo | https://www.kombo.dev/ | Berlin & New York | Full Time | On-site Kombo is building the unified API for HR systems — a single integration that connects companies to dozens of HRIS, ATS, payroll, and recruiting platforms. We’re a fast-growing engineering-driven team backed by top European investors, working on hard API and data-sync challenges that developers love to solve.

We’re hiring across Engineering, Commercial, and Customer Success:

Commercial (New York, On-site): Business Development Representative US (Enterprise): https://jobs.ashbyhq.com/kombo/2fc874bb-8a64-4cda-9c0c-8d214...

Business Development Representative US (Mid-Market): https://jobs.ashbyhq.com/kombo/fbe34ca5-8da0-4ed5-8886-46eb3...

Customer Success (Berlin, On-site): Customer Success: https://jobs.ashbyhq.com/kombo/e5d7e5aa-4413-40ac-a77b-484d1...

Engineering (Berlin, On-site): Senior Product Engineer: https://jobs.ashbyhq.com/kombo/221b2f22-ead1-48e1-b0ca-9a7c6...

Senior Site Reliability Engineer (Database): https://jobs.ashbyhq.com/kombo/e5799cf1-9b73-4bee-bd57-24ab5...

Technical Support Engineer (Berlin): https://jobs.ashbyhq.com/kombo/95e1ed46-b75f-4159-b134-9842a...

Technical Support Engineer (New York): https://jobs.ashbyhq.com/kombo/e3ee9f67-a740-475d-86bf-10b25...

Come help us build the infrastructure layer for the future of HR tech.

Datadog | Software Engineers | ONSITE (Boston, Lisbon, Madrid, NYC, Paris, Tel Aviv) | Full-time

Datadog is a monitoring, tracing, logs system, and more, for your infrastructure and services. We build our own tsdb, event store [1][2], distributed tracing tools, cutting edge visualizations, and more. We love shipping great experiences for customers just like us and are growing fast! We write a lot of Go, Java, Python, Typescript (with React), and a bit of other languages. We run on k8s, and are multi-region and multi-cloud.

We're looking for people who can build systems at scale as we process trillions of events per day. Let us know if that's you!

https://dtdg.co/hnwhoshiring

[1] https://www.datadoghq.com/blog/engineering/introducing-husky

[2] https://www.datadoghq.com/blog/engineering/husky-deep-dive

Shorebird | Mid-Senior Systems/Runtime (C++) Engineer| REMOTE (North America) | Full-time | $160-230k + equity + benefits | https://shorebird.dev

Flutter/Shorebird founder here. Flutter is used by millions of devs (and nearly ⅓ of free apps submitted to AppStore), but is missing services for businesses. We offer Flutter-related SAAS used by 1000s businesses globally, on track to profitability early 2026.

As part of our over-the-air updates “code push” product, we’ve built a custom compiler and runtime for the Dart language, primarily written by me (founder/CEO). Now that we have thousands of customers, I have many other responsibilities and need to bring on a fulltime engineer (you!) to take over primary responsibility for all of our C++ code (Dart & Flutter forks, custom runtime, compiler, etc.) and evolve it further than I could alone. Together, you and I will add obfuscation, improve our interpreter, possibly re-write method dispatch, etc. You don’t need to be a compiler/runtime expert. You do need to be capable of working on large open source projects, be comfortable with C++, want to work at a startup, work well independently (we’re remote) and want to learn and work on lots of different areas of code.

If you’ve contributed at least a little to WebKit, Godot, Firefox, or any other large open source project, are compiler/runtime curious, and want to work at a growing startup, you will likely find this role extremely rewarding.

We’re a small, senior team, making something people want. Tech: GCP, Cloudflare, React, Dart, C++, Rust. Shorebird operates almost entirely in the public over Discord. https://discord.gg/shorebird

https://shorebird.dev/jobs

Category Labs | https://www.category.xyz/ | Remote and NYC | Full Time | $200K USD+

Category Labs (formerly known as Monad Labs) is a team of systems engineers and researchers on a mission to design and build at the frontier of decentralized technology. We strive to design and build step-function improvements over existing blockchain solutions. After raising $225M in series A funding, led by Paradigm, we are growing our team. Monad Mainnet Launched on November 24th!

Technical Project Manager: https://jobs.ashbyhq.com/category-labs/bdfe89a6-83f6-4ab3-b6...

Senior SWE (Rust, C/C++): https://jobs.ashbyhq.com/category-labs/45f674b2-d904-482e-a5...

Senior Researcher, Systems: https://jobs.ashbyhq.com/category-labs/015934c5-66e5-4042-94...

CoPlane (https://coplane.com/) | Product/Design Engineer + Designer | NYC or Remote (North America) | Full Time

The world doesn't need another ERP. CoPlane is building the Agentic Orchestration platform that enables enterprises to orchestrate intelligent processes across their existing systems. Founded by ex-Stripe/Segment product and tech leads, we're changing how businesses operate their backoffice - helping them scale intelligence not headcount.

We're looking for exceptional engineers to grow our small founding team of engineers that include ex-founders, open source contributors (authors of neovim and neverthrow), and architects of petabyte-scale data platforms. You'll work with billion-dollar enterprises solving their hardest, most mission-critical automation problems.

If you're excited about working at the nexus of data, automation and AI, and want to make a significant impact in an early, well-capitalized startup with large enterprise design partners, we'd love to hear from you.

Roles: Product/Design Engineer and Designer.

For more info and to apply: https://coplane.com/careers