Upwave builds brand measurement software for large advertisers, agencies, and media partners. We process high-volume ad exposure + survey/event data and turn it into brand lift, reach validation, optimization recommendations, and AI-assisted analysis for enterprise marketers.
We're looking for a senior full-stack/backend-leaning engineer who can be productive quickly in our JVM/Spring Boot stack. Recent production experience with Java, Kotlin, or similar is important for this role; we need someone who can help us ship and operate backend services without a long stack ramp-up. Strong candidates also bring Python, SQL/data modeling, AWS/Kubernetes/observability, and high-volume event or analytics pipeline experience.
The work includes building APIs and data pipelines, productionizing analytics/statistical workflows with Product and Data Science, improving reliability/performance, and building AI-powered customer experiences. Stack includes Kotlin/Java, Python analytics services, React, MySQL, DynamoDB, AWS, Kubernetes, Terraform and LLM orchestration.
We're profitable/growth-stage, remote-first in the US, and engineering-led: high velocity through focus and leverage, not crunch. Interview process includes an in-person meeting.
Apply: https://www.upwave.com/job/8547924002/ Or email me directly: jason.kelly@upwave.com
We're Pelotech (https://www.pelotech.com), a software consulting company. We are deeply technical but also deeply human: approachable, adaptable, curious, and helpful. We aren't here to blindly build features; we're here to solve problems thoughtfully.
We're looking for a Staff Software Engineer who enjoys working directly with clients, mentoring engineers, and solving messy real-world problems.
You might call yourself a passionate polyglot, versatile specialist, or curious expert. We're looking for engineers with 5+ years of experience, strong backend skills, proficiency in languages such as TypeScript, Go, Python, Java, or Rust, and familiarity with Kubernetes, Terraform, ArgoCD, AWS, and GCP.
We value curiosity, pragmatism, kindness, autonomy, and people who enjoy learning new technologies.
Compensation: $160k–$210k base salary + 10–20% profit sharing + full benefits.
Contact: [henry.anderson@pelo.tech](mailto:henry.anderson@pelo.tech) https://www.linkedin.com/in/henryanderson9/
Fold is a publicly listed bitcoin financial services company building the tools people need to earn, buy, sell and live on Bitcoin. We're looking for a Senior BE Engineer to help build the financial infrastructure behind our products - payment processing, ledger systems, card transaction flows and event-driven pipelines.
- 5+ years software engineering experience - Strong in: Java or similar (Kotlin, Scala, C#) - Experience with: production microservices, distributed systems - Familiar with: messaging/event streaming (Kafka, Pulsar) - Solid relational database and data modeling skills - Nice-to-have: fintech, payments, ledger/accounting domains - Nice-to-have: event-driven architectures, CQRS, event sourcing - Nice-to-have: Micronaut, Quarkus or similar modern Java frameworks - US residency (regulatory requirement) Benefits: - Competitive salary + equity - 401k with 3% match - Unlimited PTO + yearly vacation stipend - Full health/dental/vision - Paid parental leave - Regular team meetups - Bitcoin starter pack (hw wallet included)Email tiffany.sawhney (a) foldapp.com if you have questions or apply here: https://ats.rippling.com/fold-inc/jobs/514ba20e-a93e-4960-ad... [0] https://foldapp.com
Tapitab is a stealth-mode fintech startup building a proprietary self-learning customer intelligence platform for the US hospitality industry. We are patent-pending across multiple core innovations and are moving fast toward launch.
We are looking for a Senior Software Developer to join our technical team and take full ownership of building our POS software layer — including payment integration, tab origination and settlement flows, and Android application development on a handheld payment device.
What We Need:
• 5+ years of Android development experience (Java or Kotlin) • Hands-on payment processor API integration — Stripe, Shift4, Fiserv, Worldpay, Finix, or equivalent • Deep knowledge of EMV, NFC, and contactless payment standards • Proven experience building POS software for bars, restaurants - hospitality industry • Prior work with leading POS system providers is a strong plus
Compensation: - Permanent: competitive salary + meaningful equity - Contract: competitive hourly/daily rate - Open to either arrangement depending on the candidate
This is not a general dev role. We need someone who has built payment flows before and understands the hospitality POS environment from the inside.
Referral bonus — refer someone we hire and we pay you $2,500 on their start date. No middleman.
Contact: info@tapitab.com
I’m sourcing candidates for a remote Software Developer role with micro1.
Relevant backgrounds: Python, Rust, Go, Java, Node.js, full-stack, Android, or iOS.
Details: Remote / Global Contract $60–$110/hr 100 openings 1+ years hands-on dev experience AI interview required
Apply: https://jobs.micro1.ai/post/774871bf-951f-4f26-9fe8-42eabfce...
Disclosure: I’m sourcing for this role as a recruiter partner, so the link includes referral tracking.
Stpkr Technologies is hiring for the following roles to build the next generation of wearable devices.
We are currently looking for the following 4 roles but we are also open to interviewing any candidates who feel like they will do their best work here - even if your skillset/experience doesn't fit the current defined roles. Our current team doesn't fit the conventional mold, and we don't expect our future hires will either. If you don't fit the advertised roles, just send us a mail per the same process with whatever job title would fit you the best.
Work is in person near Noida Sector 18, walking distance from Sector 18 Metro Station. We prefer in office work, but we are super flexible overall, it will be hands down one of the best work environments you can get. Pay is competitive, and there are opportunities to earn meaningful equity down the line. We prefer current and recent undergraduates for our roles. If you are still in college we welcome you to apply nonetheless provided you can work as an intern for us in person. Super-flexible overall and all of our current team started out as interns.
Hiring across OS, full-stack, and hardware. AI policy across all roles: you should be able to do the work without AI, and much faster with it.
Android Systems Engineer (AOSP/BSP) - Everything at the OS layer. You've rooted phones, flashed custom ROMs, broken and fixed Linux for fun. Comfortable in C/C++. GitHub with kernel-adjacent or LineageOS-type projects a plus. Stack: Android, Linux, C, C++, Java. _Filter: send us something you built where you had to fight the OS or hardware.
Full-Stack Engineer (Apps + Backend + ML) - Everything at the platform layer. Generalist who ships end-to-end. Skill check: can build a crude-but-working facial recognition system (camera → model → DB → backend). (using existing facial recog models) Bonus for weird/constrained hardware work or running ML on edge devices. Stack: Android, Java, Python, TypeScript. _Filter: send the most useful thing you've built and used (no CRUD slop). Even better if you still use it for yourself.
Hardware Engineer - Bring-up/Debug/Integration - Take EVT/DVT boards and make them work. Comfortable with J-Link and IDE debugging, reading schematics and reference designs. KiCad/Altium/EasyEDA hobby work would make you ideal. PetaLinux experience or hunger to learn it. ECE undergrad fine. _Filter: photo of a board you designed or debugged, plus what went wrong.
Hardware Engineer - Power/RF/Wireless - Make the power and RF paths behave on EVT/DVT boards. Hands-on with schematic capture, layout, soldering, scope/logic analyzer. Given two unknowns, you pick one and start measuring. _Filter: sensor fusion work, how noise behaves across protocols, and SPI debug chops.
Founder's Office - Work closely with the founder and the rest of the team to manage the day to day and long term affairs of the company, the Man Friday of the company. Must have a decent degree of technical knowledge (we are a tech company after all) and be efficient at administrative tasks as well as management. Speed and learning ability are prized here, there will not always be a clear path to the work you have to do here, so you will have to figure some of it out on your own.
To apply, contact arnav@stpkr.in with the subject line "HN - Human" and a brief intro for further communication. Attach any documents you deem useful there. Please include the role you are applying for at the top of the email if it is one of the above mentioned, otherwise whatever role fits you best. Shortlisting will be online, interviews will be in person. We are hiring quickly, expect to hear back from us within 2-3 days of applying. If you don't, assume you will not. Thanks for your time!
Company: We're a small scientific software development company that develops custom scientific and engineering analysis applications in domains including: space situational awareness (monitoring the locations, health and status of on-orbit satellites), image simulation, high power microwave systems, modeling and simulation, laser systems modeling, AI/ML including physics-informed neural networks (PINN), human body thermoregulation, computer vision and image processing, high performance computing (HPC), computer aided design (CAD), and more. All exciting applications and no CRUD. We emphasize high quality code and lightweight processes that free software engineers to be productive.
Experience: Except for interns, we currently require a Bachelors degree in physics, engineering, math, computer science, or a related field. Masters or PhD is a plus. (Roughly 25% of our staff have PhDs.)
Technologies: Lots of C++23, Qt 6.9, CMake, git, OpenGL, CUDA, Boost, Jenkins. Windows and Linux, msvc/gcc/clang/clangcl. AI/ML and analysis projects use Python and C++. Web projects use Java and Typescript/React. We're a bit behind the curve on developer AI adoption, and we're okay with that.
Apply online: at https://www.stellarscience.com/careers/.
At FusionAuth, our mission is to make authentication and authorization simple and secure for every developer building web and mobile applications. We want devs to stop worrying about auth and focus on building something awesome.
There are a lot of companies in the auth space, but we feel like we have something special:
* a relatively unique deployment model (self-host on-prem, run in your cloud or let us operate it for you in ours)
* A well designed API first approach; one customer compared our APIs to petrichor
* a mature product (the code base is nine+ years old and we've found and fixed a lot of the sharp edges around core login use cases; but don't worry, there are plenty more features to add)
* a full featured free-as-in-beer version which makes the sales cycle easier; prospects often come in having prototyped an integration
Our core software is commercial. We open source much of our supporting infrastructure. Technologies and standards that you will work with: modern Java, PostgreSQL, Docker, Kubernetes, MySQL, OAuth, SAML, OIDC.
Learn more, including benefits and salaries, and apply here: https://fusionauth.io/careers/ ( Click/tap the 'View open positions' orange button. )
Everflow is a SaaS Partner Marketing platform for managing and scaling revenue from affiliates, partnerships, and marketing channels. We're 10 years in, profitable, no outside funding
The stack : Java, Angular (Typescript), Go, MySQL, Redis. We're a GCP shop and make heavy use of Pub/Sub, BigQuery, BigTable and Kubernetes (GKE)
We're looking for software engineers and / or senior software engineers (at least 3 years) with some hands on experience to join the growing (~15 devs / SREs) team and help us build the product. We don't have a specific profile in mind but you have a track record of shipping, are interested in architecture / care about the craft and are comfortable in a no-downtime environment.
Fluency in french is a hard requirement
Email me directly at everflow-hn@everflow.io
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!
[1] https://www.datadoghq.com/blog/engineering/introducing-husky
[2] https://www.datadoghq.com/blog/engineering/husky-deep-dive
[starbridge.ai](https://www.google.com/url?q=http://starbridge.ai&sa=D&sourc...)
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.
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.
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.
We're looking to build our in-person team in NYC but also open to remote!
Apply: [https://starbridge.ai/careers](https://www.google.com/url?q=https://starbridge.ai/careers&s...) and mention HackerNews or email [recruiting@starbridge.ai](mailto:recruiting@starbridge.ai) with your resume.