Tango is a live-streaming platform with 400M+ registered users — high-scale B2C at the intersection of video streaming, creator economy, and social features. I'm an Engineering Manager building two product teams focused on activation and retention. Looking for engineers who take ownership and push back when something doesn't make sense. Backend: Java 17–21, Spring Boot, GCP, Apache Kafka, MySQL, Redis, Aerospike Frontend: React 16+ (hooks), TypeScript/ES6+, Redux + Redux Toolkit, SASS, Jest Android: Kotlin/Java, Dagger2, Compose UI, Kotlin Flows, Coroutines Open roles:
Senior Backend Engineer Senior Frontend Engineer Senior Android Engineer QA Engineer (automation-focused)
Relocation to Limassol, Cyprus: full relocation package, work permit + residence permit for spouse, hybrid (1 remote day/week), stock options, competitive salary + performance bonus, medical insurance, meals in office. Careers: https://business.tango.me/careers Direct contact: https://t.me/joetribbb
We offer a strong engineering culture and are looking for engineers to design and optimize high-performance trading systems that power our periodic auction matching infrastructure.
We build production systems in Rust and are seeking engineers with meaningful Rust, C++, Java, or Python experience, particularly from backend or systems-oriented environments.
Systems Engineer Systems programming role focused on low-latency, high-throughput distributed computing. Work across order and data workflows, auction execution, reliability, and performance optimization to ensure the platform is efficient, fault-tolerant, and capable of complex trade matching at scale.
We’re especially interested in engineers who: Have built backend or systems-level software Care deeply about performance, concurrency, and correctness Are motivated by real-time, performance-sensitive systems Have experience with compilers, static analysis, or language tooling (a strong plus)
Software Engineer, Data Platform Build and evolve the infrastructure behind our analytics platform. The role sits between data engineering and backend development and focuses on high-volume, time-sensitive data pipelines and workflow systems that process terabytes of trading data and billions of rows daily.
We’re especially interested in engineers who:
Have built internal data platforms or large-scale pipelines (Python/SQL; Rust a plus) Have experience with workflow orchestration (Temporal, Airflow, Dagster, etc.) Have worked with large datasets, columnar formats (Parquet/Arrow), and production data systems
CONTACT: careers@onechronos.com – please include “HN” in the subject line. ADDITIONAL OPENINGS: https://www.onechronos.com/careers/
We are excited to announce an opening for a Senior Java / Mainframe Application Developer to support our client with enterprise-scale software systems. This role allows for 100% remote work, and you will be part of a dynamic and collaborative Agile team focused on modernization initiatives. We offer a comprehensive benefits package including health, dental, vision insurance, life insurance, a 401(k) plan, and paid time off. Join us in supporting mission-critical processing systems for the IRS and be an integral part of our innovative team.
More details and option to apply: https://devitjobs.com/jobs/InfoMarines-Inc-Senior-Java-Devel...
The work: design and build secure, performant platform services for AI at scale; collaborate with infrastructure, product, design, and research teams; ship high-quality code that reaches hundreds of millions of users; move fast in a design-driven environment.
You: solid fundamentals in systems thinking and software engineering; fluent in Python, C#, C++, Java, JavaScript, or similar; shipped real products or systems people use; can communicate across technical and non-technical teams. Worked at companies/products of global scale and at least 1 startup-like environment (startup or internal incubator).
Compensation: Competitive with other frontier AI companies, commensurate with experience. Relocation available.
We're actively hiring and will respond to qualified applicants. Check https://microsoft.ai/careers for current openings, or email maiplatformjobs@microsoft.com. Apply directly if genuinely interested in building the future of AI.
New grads: If you've had 2+ MAG7+ internships (or adjacent large scale experience) AND a strong transcript from your university. Use [NEW GRAD] in the subject line.
We are currently seeking a talented and driven Java Developer to join our team full-time. This is an exciting opportunity to contribute your skills and expertise to a venture backed funded fintech trading firm with emphasis in US equities capital markets tech based out of the New York City and in exchange we’ll provide you with base comp $125k-200k, full benefits, cash bonus, and equity.
Requirements:
- Electronic trading server-side software development experience
- Experience in Open Source technologies such as Aeron Transport, Aeron Cluster, Aeron Archive, Artio, Agrona, or CoinTossX is a big plus
- Experience with Adaptive Hydra trading platform is a big plus
Benefits:
- Flexible hybrid schedule to accommodate other commitments
- Collaborative and supportive team environment
- Relocation assistance to NYC Metro area
If you are passionate about Java development and interested in joining a fintech venture, we would love to hear from you. Please submit your resume if interested to agency@furtimmodus.com in this opportunity.
At Mighty Acorn, we make it easier for governments to deliver world-class digital services. From renewing a fishing license to applying for unemployment benefits, we build digital services that enhance public trust and satisfaction.
Our vision is a world where “good enough for government work” returns to its pedestal: fast, reliable, and frustration-free. We achieve this by empowering people, increasing transparency, breaking down silos, and moving together toward a shared goal.
Specializing in modern software development, DevSecOps, and scalable infrastructure, we focus on leveraging automation to manage complexity, accelerate transformation, shorten feedback loops, and reduce risk to build a world where government programs run reliably, smoothly, and efficiently.
We are hiring for the following roles:
- Software Engineer V - Infra/SRE (AWS/Terraform/Typescript) - Software Engineer IV - Full Stack (Typescript/Java)
We’re hiring early-career engineers (0–2 yrs) to work on open digital infrastructure with real-world impact.
You’ll work on backend systems that power high-throughput services used at population scale, with a focus on privacy, reliability, and interoperability. Most of your work will be open source, contributing to reusable digital public infrastructure adopted by governments and organizations.
What you’ll do: - Build and maintain Java (Spring Boot) microservices - Work on distributed systems and APIs at scale - Contribute to open-source repositories - Collaborate on system design and reliability improvements
Tech stack: Java (Spring Boot), Microservices, Kubernetes Exposure to Digital Public Infrastructure is a plus (can be learned on the job)
What we’re looking for: - Strong fundamentals (CS basics, APIs, data structures) - Ability to learn quickly and work independently - Interest in open source and public-impact systems
To apply: Email: talent_hiring@infystrat.com Subject: HN Hiring – <Your Name> Include: - Resume - GitHub profile (important) - A short note on why this work interests you
Be the 2nd technical hire for a greenfield platform for securities lending, repo and delta-1 trading. Python ETL + Java, Postgres, working directly with traders and ops to replace workflows that don't scale.
2–7 yrs Python/Java. Capital markets knowledge useful but not required.
Health insurance, 1d WFH after probation.
Apply here: https://www.careers-page.com/gtx-uk-llp/job/4RR4785V
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.
Apply online: at https://www.stellarscience.com/careers/.
IMPORTANT: ONLY APPLY IF YOU ARE PHYSICALLY BASED IN GERMANY OR UK! (I received almost 100 applications, about 85 of them did not read the details)
We build an open source data platform on Kubernetes. The product (Stackable Data Platform - SDP) bundles 12+ open source data tools (Trino, Apache Kafka, Apache Airflow, Apache Superset, etc.) and makes them work together. Right now everything is Infrastructure-as-Code only. We need someone to build a UI layer on top.
No mockups, no Figma, no product roadmap waiting for you I'm afraid, just a bunch of ideas :) We're all backend people and need someone to own this end to end. Play around with our product stack, figure out what customers actually need, build it.
Stack (because we got started without you...): Svelte/SvelteKit, TypeScript, TailwindCSS. SDP itself is Rust, Java, Python on K8s. Three releases a year. Not SaaS. Quality matters.
100% remote, Germany (UK possible) only, no other countries, sorry. No Scrum, minimal meetings. Interview process is usually just two conversations. The position isn't on our homepage yet as I'm on vacation. Send a mail to recruiting@stackable.tech and I'll get back to you next week. Please mention HN in your mail. My personal mail is also in my HN profile. I'm the Co-founder and CTO.
Luminate is the entertainment industry’s preeminent data and insights partner, serving as the single source of truth for record labels, film studios, talent agencies, and every part of the music and entertainment ecosystem.
The team's stack is Java w/ Spring, React w/ Typescript, and SQL w/postgres, and snowflake. We use playwright for e2e testing and deploy our infra on AWS.
The team is relatively new (around 3 years old) but is working on an older codebase with plenty of tech debt. Luckily we actually _do_ get time to address our tech debt and take the time to leave our code better than we found it, so it's getting better all the time.
We have an oncall rotation but getting paged is pretty rare.
Apply here: https://luminatedata.com/careers/?gh_jid=4677478005
Please mention Hacker News in your cover letter.
Ridgeline International builds software that fights Ubiquitous Technical Surveillance (UTS), which is the growing threat of everyday commercial devices, apps, and networks being used to passively collect data on people and organizations without their knowledge. Think smartphones, smart TVs, IoT devices, and third-party apps leaking sensitive behavioral and location data at scale. Our tools help U.S. government and enterprise customers understand and manage that exposure, often before they even realize they have a problem.
This is a genuinely full-stack role. You will own features from design through deployment, working with Java (backend), Angular (frontend), REST and GraphQL APIs, SQL databases, and cloud infrastructure with DevOps workflows. For the first four months you will support legacy systems built on C# and Azure, then transition to our modern core platform. That bridge phase is intentional, not a bait-and-switch.
What you need:
U.S. citizenship required, ability to obtain a security clearance 5 or more years of professional software development Strong OOP fundamentals and relational database experience Comfort with REST APIs and a genuine growth mindset
Bonus if you have: Java or Angular experience, GIS or mapping work, DevOps and CI/CD, or containerization (Docker, Kubernetes).
Perks include flexible PTO, a generous 401k match up to 10% with automatic 3% safe harbor, full health benefits, HSA employer contribution, professional coaching, and personal privacy protection services.
We are the hiring company, not a recruiter.
Apply here: https://smrtr.io/y462n
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)
* 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)
* our CTO is the founder and still writes code
* a full featured free-as-in-beer version which makes the sales cycle easier; prospects often come in having prototyped an integration already
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. )
Addepar is hiring a Software Engineering Manager for our New Workflow Platform team. We are pivoting from a SaaS suite to a global orchestration platform. We’re looking for a hands-on leader with 2+ years of management experience and a deep understanding of workflow technologies such as Temporal, n8n, Pipedream and Distributed Systems. Lead a team of Senior Staff engineers building the "Agentic Fabric" of the financial world. Hybrid | NYC | Python/Java | Temporal Cloud
Job description: https://job-boards.greenhouse.io/addepar1/jobs/8460804002
Please email me directly: douglas.clifford@addepar.com
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
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.
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 recruiting@starbridge.ai with your resume.
Apply at: https://jobs.ashbyhq.com/oscilar?utm_source=HackerNews