Katana Labs is looking for experienced full stack engineers. We are a well funded FinTech startup based in London, working on an AI powered trading platform. Your main focus will be developing Go applications but we’re looking for a strong all rounder with experience in containers, kubernetes and cloud as well as the occasional frontend task. A DevOps mindset and focus on QA is a must.
Requirements - 5+ years of full stack experience - 2+ years of production grade Go experience - 1+ years of kubernetes experience - 1+ years of cloud experience
Tech Stack - Go - React - Kubernetes - PostgreSQL - Google Cloud Platform
Location: Remote (preferably UTC+3, UTC-3)
Hallmark Labs is the digital arm of Hallmark Cards, Inc., based in Santa Monica, California.
We currently operate two digital subscription services, Hallmark Movies Now and
Hallmark eCards, as well as ongoing initiatives in personalized, print-on-demand
greeting cards. We are a diverse team of innovators, creators and influencers
leveraging Hallmark’s deep experience in creating meaningful connections and
progressing it into the digital age with cutting-edge technology.
Senior Software Engineer, Platform - Go/Microservices
You're a seasoned polyglot engineer that is driven, takes ownership and is solution oriented and ready to join a stellar new team working on cross product foundational platform, shared by all our products written in Go. You'll be building robust and scalable software in multiple modern object oriented and functional languages. And making the company transitions to microservices using Go and Kafka.
As a part of this role, you will:
Required Qualifications:
Preferred Qualifications:
The Wire Team plays a pivotal, yet behind-the-scenes, role at CAST AI. While they may not directly manage the products that customers purchase, the value they create is indispensable for making all of CAST AI's offerings functional and user-friendly.
The team develops a wide array of user-facing features that contribute to a fully realized platform. This includes designing robust authorization and authentication flows, managing user and organization accounts, as well as implementing notifications and audit systems, among other tasks. Furthermore, they create frameworks and tools that enable other internal teams to seamlessly incorporate these capabilities into their own products.
In addition to these tasks, the Wire Team is also responsible for implementing enterprise-level Single Sign-On (SSO) integrations as a self-service feature. They work on integrating billing systems with various cloud marketplaces and oversee the management of platform entitlements.
In essence, the Wire Team's efforts are crucial to the very existence of our platform. Their mission is to elevate the user experience, regardless of whether the customer is a small startup or a large enterprise.
How Do We Operate? At CAST AI, we specifically seek out Software Engineers rather than Software Developers. This distinction is not merely semantic; it underscores a profound difference in responsibilities and expectations. Let's delve into what sets the two apart.
A Software Engineer is responsible for overseeing the entire lifecycle of a system, starting from its conceptual genesis to its continuous delivery of value to customers. When a high-value feature is identified and properly prioritized, an engineer takes ownership. The task entails not just coding but also meticulously reviewing the technical architecture, design, and feasibility of the feature. Beyond functional aspects, we pay heed to:
Testability Adaptability Performance and Scalability Deployment and Compatibility Debugging and Operational Management. Throughout this comprehensive process, collaboration is key. While engineers are accountable for end-to-end delivery, they are also encouraged to consult with peers to arrive at the most effective solutions. The capacity to work both independently and as part of a team is essential.
To expedite delivery, we have devised a suite of proprietary tools that assist us in various aspects of development. Engineers periodically switch roles to write automated end-to-end tests, optimise our GitOps-enabled continuous integration and continuous deployment (CI/CD) pipelines, or fine-tune our observability stack. We even have a rotation for passive on-call duties to promptly address any issues that arise within our codebase.
It's worth noting that we do not employ separate DevOps or QA roles within our engineering team. Self-reliance is vital: we automate everything and construct our own tooling. Therefore, a broad systems-oriented perspective - going beyond mere software development - is indispensable for success within our team.
Our mantra is straightforward: we build it, we test it, we ship it and we operate it.
Here are some of the tools we use daily: GoLang is our language Kubernetes is our core product AWS, GCP, and Azure are the clouds we operate Postgres and cloud object storage for persistence GCP PubSub for messaging GRPC and REST APIs We use GitLab CI with ArgoCD as our GitOps CD engine Prometheus, Grafana, Loki, and Tempo for observability Deployment charts are written in Helm. Having experience with these tools is not a strict prerequisite for the ideal candidate, but it does offer a competitive edge.
The Omni Team's goal it to solve the multi-cluster multi-cloud Kubernetes challenge! Building on top of concepts from cluster federation it tries to shift the paradigm in Kubernetes usage patterns and how it is being used when many clouds are involved. And while doing this to enable CAST AI customers to realize significant AAA savings for our customers.
To give you a glimpse into the complexities we navigate:
We’ve successfully proven that you can do more with Kubernetes compute resources in the ways people didn't think was possible. We are building on top of giants, by leveraging OpenSource technologies like wireguard and controller-runtime. We write custom Kubernetes operators to orchestrate every component, related to multi-cluster operations in the clusters. Manage OpenSource project usage by maintaining stability, security, flexibility and independence. We strive for minimal APIs and user experience with the goal to make multi-cloud not only a buzzword, but reality. We're breaking new grounds of networking, Kubernetes operators and cloud provisioning at CAST AI. The above examples merely scratch the surface of what we've achieved. Consider that these efforts are magnified by the range of cloud providers we support - and each one presents its own unique challenges. Each development sprint uncovers new hurdles and learning opportunities. We consider ourselves fortunate to operate in a cutting edge technological landscape.
Here are some of the technologies we use in the stack: GoLang is our language. Kubernetes is our core product. AWS, GCP, and Azure are the clouds we operate. Postgres and cloud object storage for persistence. Temporal for our scheduling needs and executor. VirtualKubelet and ControllerRuntime for our operators stack. Terraform for IaC. GCP PubSub for messaging. GRPC and REST APIs. We use GitLab CI with ArgoCD as our GitOps CD engine. Prometheus, Grafana, Loki, and Tempo for observability. Deployment charts are written in Helm. Having experience with these tools is not a strict prerequisite for the ideal candidate, but it does offer a competitive edge.
We are looking for a Senior Software Engineer with a passion for platform engineering to join our Wire Team. This role has a strong focus on improving internal Developers' Experience (DX) tools and platforms that are integral to the success of our development process.
Initially, a portion of your time will be spent working closely with the Wire Team. This will help you familiarize yourself with CAST AI’s engineering practices and gain a deep understanding of our product. In the Wire team, your main responsibility will be managing and improving the observability (o11y) stack. Long term, you will have the exciting opportunity to transition and play a key role as one of the founding members of our Tooling Team, where you will shape and influence our approach to DX tooling and automation at scale. In this position, you will:
Maintain and optimize the observability (o11y) stack: manage Prometheus, Grafana, Loki, Phlare, Tempo, and other relevant observability tools. Ensure our monitoring, alerting, and logging systems provide a frictionless way to define engineering team-related alerts.
Improve continuous Integration and Delivery: manage and optimize CI/CD pipelines using tools like GitLab Pipelines, GitHub Actions, ArgoCD, and Helm, ensuring efficient and reliable deployment processes.
Development environment management: enable other engineering teams by maintaining and extending the existing local development tooling managed by Tilt.
Oversee incident management systems: integrate with incident management and alerting tools such as Opsgenie, Pagerduty, or similar to enhance our response capabilities and reduce downtime.
As a Senior Software Engineer, you will have the opportunity to work on different key features of our product. We are currently hiring Senior Software Engineers for the following teams:
Reporting – Builds a scalable reporting system that ingests millions of rows per second into our time-series databases, providing insights into cost savings, workload efficiencies, and Cast AI automation impact.
Pricing – Drives the synchronization of public and customer cloud resources, availability, and dynamic pricing across all major cloud providers. Empowers autoscaling by leveraging discounts, commitments, and cross-cluster tracking to maximize savings. Provides a reliable source of truth for node pricing, resources, components, discounts, and commitments.
Autoscaler – Automates Kubernetes node autoscaling to optimize clusters, balance workloads, remove underutilized nodes, and dynamically allocate capacity in real-time, thereby reducing cluster costs by half.
Workload Optimization (WOOP) – Automates workload resource management by dynamically adjusting resource allocations, helping developers significantly reduce costs and improve application reliability.
AI Enabler – Helps customers deploying and managing LLMs in their Kubernetes cluster and optimizes their workloads by providing cost visibility and intelligent routing for LLM requests to the most cost-effective compute resources (e.g. Grok, self-hosted LLAMA models).
Here are some of the tools we use daily: Languages: GoLang (primary), Python (secondary for some cases) Cloud & Orchestration: Kubernetes, AWS, GCP, Azure Databases & Storage: PostgreSQL, Cloud Object Storage PostgreSQL and Cloud Object Storage for persistence Messaging & APIs: GCP Pub/Sub, gRPC for internal communication, REST for public APIs Observability: Prometheus, Grafana, Loki, Tempo CI/CD & GitOps: GitLab CI with ArgoCD.
Requirements: Strong software engineering skills with experience in distributed systems and backend development (ideally GoLang, but not a hard requirement as long as you’re willing to transition to it) Strong debugging, optimization, and performance-tuning skills Deep understanding of cloud platforms: hands-on experience with cloud platforms like AWS, Google Cloud Platform (GCP), Microsoft Azure, and tools such as Kubernetes for containerization and orchestration CI/CD and DevOps practices experience Strong English skills, both verbal and written Ability to work independently and collaboratively within a team Startup mindset: adaptable, proactive, and comfortable with ambiguity A proactive, problem-solving mindset with a "yes we can" attitude.
Swarm is a system of peer-to-peer networked nodes for a decentralised storage and communication service.
Swarm could shape the future towards a self-sovereign global society and permissionless open markets. On Swarm, applications run autonomously yet securely in a planetary-scale deployment and execution environment.
Bee is a Swarm client implemented in Go. It’s the basic building block for the Swarm Network. Bee provides low-level constructs for file storage, feeds, key-value stores and untraceable communication, through solid, well-tested code delivered in an agile manner.
Key technologies are Go, libp2p, protobuf, leveldb, and go-ethereum, as well as various cryptographic libraries.
Should you be interested in the position, please send your CV and GitHub repo to talent@ethswarm.org.
We are seeking a skilled Staff Software Developer to join our team. This role is open in our Amsterdam office (relocation is possible), or remotely (EU or UK-based).
You'll focus on one of the most used Products: Chat, as well as the brand new Video & Audio API.
A big portion of your day will be dedicated to software design, research, and coding.
On typical projects, you will have a lot of freedom and you will be paired with another team member.
Our team is made up of very experienced engineers, some with more than 10 years of experience.
By working together you will learn from each other along the way. Not only that, you will have an enormous impact!
Our customers have millions of users; they use Stream for mission-critical features such as showing content and exposing the core functionality of their application.
You have:
Bonus points:
Our tech stack
At Stream we use a wide collection of technologies to offer highly optimised and available features to our customers. Over the years we have experimented with different programming languages, frameworks, databases, and libraries.
Here is a short list of the technology that we currently use.
Do not worry if you do not master them all or if you do not see your favourite tool or language, you will have the chance to be exposed to most and to convince us to expand the list:
Stream employees enjoy some of the best benefits in the industry:
A team of exceptional engineers
The chance to work on OSS projects
28 days paid time off plus paid Dutch holidays
Company equity
A pension scheme
Remote work flexibility
A Learning and Development budget
Commute expenses to Amsterdam covered or the option to use a company bike within the city
Fitness stipend
Monthly in-office chair massages by a professional
MacBook Pro
Healthy team lunches and plenty of snacks
A generous relocation package
An office in the heart of Amsterdam
The opportunity to attend or present at global conferences and meetups
The possibility to visit our office in Boulder, CO
Parental leave paid at 100%
Note: this list of benefits applies to Netherlands-based employees and is adjusted per your location of residence.
Stream has a casual social culture, our team is diverse and we all have different backgrounds. Now, Stream is a team of over 130+ peers from over 35 countries across the globe.
We value transparency, aim for excellence, and support each other on our way to new victories.
Our team consists of the strongest talents worldwide, making Stream a great place to learn and improve your skills.
When it comes to software engineering, our culture is oriented towards ownership and quality: our goal is to deliver stable software.
If you are interested in becoming a part of what we do, apply now!
Stream provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.
This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.
No recruiters/agencies please
Senior Software Engineer (Go, blockchain)
Swarm is a system of peer-to-peer networked nodes for a decentralised storage and communication service.
Swarm could shape the future towards a self-sovereign global society and permissionless open markets. On Swarm, applications run autonomously yet securely in a planetary-scale deployment and execution environment.
Bee is a Swarm client implemented in Go. It’s the basic building block for the Swarm Network.
Bee provides low level constructs for file storage, feeds, key-value stores and untraceable communication, through solid, well-tested code delivered in an agile manner.
Key technologies are Go, libp2p, protobuf, leveldb, and go-ethereum, as well as various cryptographic libraries.
Your role: Take architectural decisions for our p2p distributed network Suggest improvement solutions for our codebase and the testing process Development of the reference Swarm implementation in Go aka Bee Developing domain-specific knowledge and expertise in the Swarm incentive layer implementation Bringing code up to spec Delivering well-tested code Conducting thorough code reviews to your peers
Your profile: You have 5+ years of experience in a similar position & at least 3 years with GoLang You have experience in working on large-scale distributed systems Familiarity with infrastructure tools (we use k8s, helm) You follow SOLID principles You like to work in a fast paced environment Strong sense of ownership and responsibility You manage your own time effectively and respect time constraints You like to work remotely You are available around the CET timezone You can express yourself fluently in English, both verbally and in writing
We appreciate: You have a solid grasp of blockchain principles and application design considerations Experience with libp2p You are familiar with go-ethereum Acquaintance with cryptographic concepts Knowledge of monitoring tools (we use Grafana, Prometheus, Jaeger and OpenTracing) Knowledge of Solidity A passionate open-source contributor
We offer/Team perks: An open, flat and transparent work environment 100% remote friendly Flexible working hours We care about our swarm: Incentives through BZZ, our token
Should you be interested in the position, please send your CV to talent@ethswarm.org
Why CAST AI?
We are on a mission to simplify Kubernetes & its Cost Management on the cloud.
There are lots of aspects to our vision such as performance, security, and resiliency to name a few. Our product must be easy to understand and create value seamlessly. Our motto: Less friction equals happier customers.
CAST AI already brings 50% to 75% cloud savings to the most popular managed K8s platforms (such as EKS, GKE, and others). Imagine the challenges we face on a typical customer cluster with a $100k monthly bill.
This is just the beginning of our product. There are so many cool things to be done. We need smart, result-driven engineers to help us with that!
What’s in this position?
Autoscaler team is looking for a Senior Software Engineer to expand its rapidly growing team.
At autoscaler team, our day is usually full of challenges. Have you ever encountered the situation where you need to expand your cloud infrastructure, in order for certain workloads to be deployed, and once the demand is low, to cut back on your cloud spendings? Most of us probably did, or at least know the many paths that need to be taken in order to achieve that.
One of the team's responsibilities is to make sure that whenever a customer is about to deploy something the burden of making sure that things are running & not costing unnecessary money is uplifted from them. These are just couple small pieces of a bigger puzzle. To get into a more detailed perspective, try to answer the following questions:
These are just several of the many questions that are part of the daily job when working in this team.
Being part of this team would involve design and decision-making end-to-end while collaborating with colleagues from other teams. CAST AI being a technical product, it is encouraged, not only to go and code something as written in the JIRA ticket but also to come up with new features & potential solutions to the problems that customers are facing.
Here are some of the tools we use daily:
What’s in it for you?
Location is remote (EU-based).