Herdius is a Berlin based Blockchain Company. We are working on building homomorphic distributed private key generation which then is turned into value bearing products in different sectors. Currently we are very close to open beta-testing for the Herdius-Crypto-Wallet.
What we focus on on the blockchain field specifically is interoperability and trading. When connecting different chains on the key level, users can eliminate communication channels, bridges and complex systems. In other words, users can do cross-exchange and chain token swaps very conveniently and profitably for the user due to the cross-exchange arbitrage opportunities. The broader vision is one day to replace API auth keys with public-private key cryptography in order to provide layered access to user data.
All this makes for a crypto eco system and hedge fund that pays interest on all cryptocurrencies (that right now are unfortunately somewhat unusable and just laying around on wallets).
About the role:

Herdius is seeking for a Gopher Guru - an experienced Senior Golang Backend-Developer - to join our team of smart and visionary individuals. Experience in Blockchain is not necessary but a big plus.
We do not look at this role as another standard job but rather as great opportunity to build something really meaningful und amazing. Become a member of our great collective of top nodge engineers and people - altogether working to create cutting edge tech for the masses.
Besides the Herdius HQ in Berlin our Dev-Team is working mostly remote on different time-zones - so this vacancy surely also is location agnostic.
We would expect you to contribute at least 20hrs per week for part-time but joining full time is possible, too.


Cool things you will work on:
Implementation and design of Herdius’ consensus algorithm and p2p order routing protocol.
Lots of work around trading and high volume data handling and transfer.
Design and implementation of a low-latency, high-availability, and performant algorithmic hedge fund and exchange order book.
Integration of the Herdius distributed private key generation protocol.
Constant performance testing and improvement of our architecture.
Working on new financial products that have not been seen in the crypto world, setting up the base-layer infrastructure of a trading system and hedge fund
Skills & requirements
Strong proficiency & experience working with Golang
3+ years of experience as a backend engineer, language agnostic but Go, React, NodeJS, Vue.JS, Scala, Angular, Rust preferred
Experience and passion working with distributed systems and networking
Strong interest in blockchains and related technologies
Passion for delivering quality, secure code with loads of testing
User authentication and authorization between multiple systems, servers, and environments
Interest in privacy and cryptography, trading and financial service
Understanding fundamental design principles behind various consensus algorithms
Understanding differences between dPOS, DAGs, Plasma, BFT, aBFT, etc.
Implementing automated testing platforms and unit tests
Proficient understanding of code versioning tools, such as Git
Interview Process
Your education or professional experience at the end of the day does not matter to us. It all comes down to us being convinced by your skills and drive! 
We mainly look for people who are passionate about projects they work on and have the drive to see a project through. Our code is mostly done in Golang with some Solidity for connectivity with Ethereum.
How to apply:
Send anything that reflects on your knowledge and experience in the field. Besides a CV/LinkedIn-profile you can send links of your GitHub/Stack Overflow/Portfolio/ or something awesome you've built that you’re simply proud of.
Advanced Blockchain AG are looking for an experienced Back-End Developer to join our core development team. You’ll be taking on new and ongoing projects with industry leading clients looking to be the first to implement and benefit from blockchain technology.

What we offer:
An environment that embraces freedom and autonomy and values team
spirit and open communication. We encourage you to put forward your
thoughts and ideas.
An open plan office in the heart of Berlin.
The opportunity to contribute to cutting edge projects in a new and exciting
industry with the potential to positively reshape our world.
An international team of DLT pioneers from 12 different countries.
Flexible working hours.
Responsibilities:
Back-end development of our high-loaded web applications.
Working with our Blockchain API.
Rest API development.
Micro services development with Docker containerisation.
Working and maintaining different types of DB.
Collaboration and architecture planning with the team and CTO on a high-
performance back-end infrastructure.
Mentoring your team.
Main requirements:
5+ years in back-end development
Practical experience with MongoDB, MySQL, Redis, Postgres
Strong knowledge of Go and experience with C++, Python
For our startup we are looking for a Java Developer who knows what’s going on and who is a good addition to our highly skilled development team. We have space for people who like to focus on one area to become the goto person in this area as well as people who need a new challenge every now and then. People who have new ideas are more than welcome.
Responsibilities:
- Work on the development of our disruptive platform for esports data distribution
- Help us to improve and expand our OCR plattform
- Work together with our DevOps team to make our system more reliable.
- Work together with our Data Scientists to improve our data pipelines
- Create APIs to deliver our data to customers
- Have an eye for improvements in regards to performance and code quality
Requirements:
- Strong understanding and moderate (3+ years) experience working with Java, and within a Java environment.
- Moderate experience with both relational and non-relational databases
- Moderate experience writing and working with a service-based architecture.
- A fast learner who is highly motivated and independent, but also works well as part of a team.
- Output-oriented way of working
- Good problem solving skills (able to break down problems and troubleshooting bugs effectively)
- Fluent in English (both written and spoken)
Pluses:
- Experience with Python, Go-lang or Scala
- Experience with Hibernate, SpringBoot, Akka, Gradle
- Experience working with distributed messaging queues (RabbitMQ, Kafka, Pulsar) at enterprise scale
- Experience with cloud-based deployment: AWS (or similar), Docker, Kubernetes.
- Experience with game engines: Source Engine, Unreal Engine, Unity.
- Experience with OCR technologies
- Any skills or experience in reverse engineering computer games.
- Passion for esports, gaming, and technology
We offer you:
* A "get shit done" culture
* Flexible working hours based on goal reaching rather than amount of time spent in the office
* 10% of your work time to spend on esports and/or gambling topics of your choice (alone or as a team)
* Internal training sessions in your field of profession and beyond
* Gaming room stocked with 6 PCs to play and crush enemies with your colleagues
* Bayes bar with free snacks and after work beers
* Free massage sessions
* Subsidized lunches that get delivered to the office
* Free coffee, water & soft drinks to stay focused and hydrated
* Lots of game enthusiasts to talk and share game experiences with
We look forward to receiving your application (cover letter, CV and references) as well as your salary requirements and earliest possible starting date. Please send an email containing this information to: application@bayes.gg.
Backend developer Hasty.ai Berlin, Germany $65,000 to $75,000 a year
July 2019
3 Applicants This Week
More Than 6 Months Old
This job posting is no longer available
Job Description
Why Hasty?
Annotating data is an expensive hassle that nonetheless is the backbone of almost all applications of AI today. We are trying to take away some of that pain by assisting and automating to as high a degree as possible the process of labelling images, using machine learning. By doing so, we hope to open up the field of vision-based AI for new applications and for organizations that previously couldn’t use AI-powered technology as it was too expensive for them or because they lacked the technical know-how needed to develop an AI-solution from scratch.
As a workplace, we can offer you the opportunity to work on the cutting edge of AI in a startup environment, where you help us build a product from the ground up while being part of the core team with a voice in what we should do next.
Qualifications:
4 years of experience in designing and building complex software systems
Extensive experience writing applications with Python
Experience with Golang is a plus
Experience designing and operating distributed systems
Experience performing code reviews and pair-programming with other software engineers
Proactive communication and excellent teamwork skills
Ability to work independently and take ownership of tasks
What we offer:
Competitive package with equity and a sizeable learning budget that you can spend as you wish to develop yourself
A real problem to solve with the potential of having a real impact on the world around us
A startup environment with flat hierarchies
Support from a WATTx, a Berlin-based company builder, offering you the security and support of a larger organization
Workplace flexibility - Home-office, remote, adjustable working hours - we place our trust in you being the best person to plan your workweek
A great place for the intellectually curious, as we are sharing offices with other startups in the AI landscape
Golang Engineer synergist.io GmbH Berlin, Germany €55,000 to €70,000 a year
March 2019
4 Applicants This Week
More Than 6 Months Old
Job Description
At Synergist, we've begun an ambitious project to to automate human negotiation.
We're building a foundation for algorithms to predict the best way for two people to reach agreement on legal contracts.. nothing like this hasn't been attempted before.Â
We make human negotiations machine-readable, create big data sets of behavioural data and use open APIs to integrate with third-party platforms. If we do our job right, our users feel empowered to negotiate contracts and get sh*t done really quickly.
We're now looking for a a backend focused Go Engineer who is comfortable building complex, server-side business logic and contributing to our extensible architecture built on RESTful APIs. Our solution runs on a modern stack which is deployed via CI/CD on Redis and stored in Docker containers running on AWS.
We have flexible working hours, no hierarchy and give you the autonomy you need to get sh*t done. We're a small team that iterate quickly, but also value who you are over how good you are... Our culture is our greatest asset and we try not to take ourselves too seriously ;)
What we are looking for:
5+ years of experience with any general purpose programming language (PHP, Java, Python); or a solid Computer Science background and a desire to learn new stacks
A desire to learn Golang
Strong MySQL and database design skills
An understanding of how design decisions affect scalability, storage requirements, and the like
Basic Linux skills
Fluent in spoken and written English
Nice to have:
Previous Golang experience
Experience working on a consumer product at scale
Experience with Docker, ECS and AWS
Familiar with at least one frontend framework (React, Ember, etc) - AngularJS is preferred
Familiarity with Redis, Docker and/or AWS
What we offer:
Work with cutting-edge technologies that are new in the market
A small international team with different skill sets, backgrounds and cooking abilities ;)
Engineering culture: 80% of our team works in technical positions and engineers contribute directly to product decisions
A bright and spacious office (central Berlin near Checkpoint Charlie) with huge kitchen for breakfast, pasta, snacks and drinks (all included)
Choose your laptop, screen and (mechanical!) keyboard
In summary:Â


If you'd like to be part of building an enterprise software company from scratch and responsible for shaping the world's first automated negotiation bot with a bunch of cool people, then get in touch.
Blockchain Engineer Chorus One Berlin, Germany / Remote $70,000 to $110,000 a year
November 2018
4 Applicants This Week
More Than 6 Months Old
This job posting is no longer available
Job Description
Chorus One is close to releasing a validating node for the Cosmos network. We are actively searching for a Blockchain Engineer to build validating nodes for other decentralized networks. The work consists of reviewing codebases of other decentralized networks, designing a path forward to deploy validating nodes using our internal infrastructure and to ensure operational security in deployed infrastructure. This position is a unique opportunity to work with a very experienced team on cutting-edge decentralized networks and financial services around cryptocurrency.
Responsibilities:
Review core codebases of decentralized networks such as LivePeer, Tezos, Cardano and map out infrastructure requirements for validating nodes.
Design, implement and merge additional functionality in codebases of said networks, as needed, to make validating nodes compatible with our infrastructure.
Write functional and integration tests to verify software upgrades in blockchain networks for which company runs validating nodes.
Design and implement processes to reduce the lead-time of deployment of validating nodes in new blockchain networks.
The ideal candidate:
Is able to work independently. Has a minimum of 2-3 years work experience with a medium size company or a startup.
Possesses either Bachelor or advanced degrees in Computer Science or allied fields.
Needs to have prior production experience / strong interest in pure functional languages (Haskell, OCaml). Go language skills are a plus.
Has work experience with distributed algorithms. Prior experience with blockchain clients such as Go-Ethereum, Bitcoin Core, Tendermint or similar is a plus.
Is curious and able to take initiative in team discussions pertaining to business economics and business opportunities.
Keywords pertaining to tools: Functional languages, Haskell, OCaml, Golang
Perks & Benefits
Competitive salary plus equity.
5 weeks annual leave.
Full-time position.
Location: Remote work.
Work on cool technology and interesting problems at the intersection of finance, cryptocurrency, information security and DevOps.
Backend Engineer Jodel Berlin, Germany €55,000 to €65,000 a year
October 2018
5 Applicants This Week
More Than 6 Months Old
This job posting is no longer available
Job Description
We created Jodel to let you instantly connect, share, and engage with the community around you. We built thriving local communities across Europe and continue to expand globally. With over 1 million users creating more than 6 million posts per day, we have one of the industry's highest retention rates. We've attracted great investors such as Christophe Maire, Adam d’Angelo, and the Floodgate Fund, and even been the subject of several academic papers.
We're growing our Engineering team around a culture of sustainability and empowerment. We're dealing with dynamics such as being local, signup-lean and many more, which give us new problems to solve -- we’re literally breaking new ground in the Social Network space. Data-driven by default, with a bias for quality and code sustainability, and fostering a solid DevOps and Automated Testing culture, Jodel's Engineering team is the place to be!
Attitude we're looking for
* You’re naturally motivated and proud of doing great work;
* Numbers and data are the best way to drive your decisions;
* You have a strong personality, sense of ownership and responsibility;
* You put people and human interactions above processes and rules;
* You understand the value of "measure twice - cut once" and you work by this mantra;
* You own your successes and your failures, and constantly seek to improve;
* You keep your mind on the product we're building, and are permanently aware of how each small action influences its success.
What we value
* Your studies were in Computer Science, Mathematics or Engineering;
* You're a problem solver, and you’re eager to experiment and learn new things;
* You write code optimizing for clarity and readability;
* You value testing very highly;
* You write software aiming at reducing the cost of change;
* You enjoy pair programming and code reviews, and see your job as a collaborative effort rather than solitary work;
* Engineering work is mostly about compromises and so you're always open to discuss different approaches to problems;
* You're happy to collaborate with your community and industry, either in open source projects or presenting at meetups and conferences;
Skills we're looking for
* You have experience with either Node.js or Golang, but you're definitely interested in doing more Golang as part of your job;
* You want to work in Distributed Systems;
* You have experience with MongoDB and Redis, beyond "I have played with it in the past";
* You have a bias to automate things when possible;
* You’re ready to embrace a DevOps culture, because an Engineer’s work doesn’t end after we ‘git push’;
* You're ready to work with Linux, Cloud providers, Docker, Kubernetes
What do we offer?
* An Empowered Team -- Engineering owns tech debt and tech improvement decisions; we collaborate tightly with our product team but we're all very mindful not to step on each other's toes. We own technical decisions, take responsibility and are accountable for them..
* Preventive culture, rather than reactive -- While some of us participate in on call duties, we have a very low amount of actual production emergencies. A lot of energy goes into fixing root causes and we are very proud of not having anyone in firefighting mode.
* Career building is part of the deal -- you don't join to just write tests and contribute to the product - you also join to improve your career. We pay special attention to your personal development and make sure you're focusing on the skills that matter the most to you.
* Lean processes -- we try hard to cut meetings and processes to a minimum, to ensure that you’re being productive. And we encourage all interactions to be direct and open, not forcing you to go through any intermediaries to get your work done.
* United in diversity -- with people from all over the world, from Tunisia to France, from India to the Poland, we are multicultural by default and proud to be so. We all come from different walks of life and cultural backgrounds, and we continue to push for diversity in our team!
* We're building a team, not just making money -- we solve hard problems together but we also relax and have fun. From team cooking to going on company trips, from office parties to go-karting, we'll make sure you have a good work-life balance.
* The future will be amazing -- the list of non-trivial challenges we'll be dealing with includes developer APIs, security issues, scaling access to a lot of data (among other things we can't tell you about :-) ); all of this with location and anonymity as their own dimensions in Jodel.
* No one else is doing what we're doing -- it's that simple. We're pioneering local communication and since communication is a basic human need, our work is super exciting. On top of that, we are one of the few large scale European Social Networks. There’s not that many and we're very proud to be "Made in Europe".
Golang Blockchain Engineer Herdius Berlin, Germany $50,000 to $80,000 a year
October 2018
4 Applicants This Week
More Than 6 Months Old
This job posting is no longer available
Job Description
Job Description
We are looking for awesome backend developers to join our Berlin team at Herdius. We are a blockchain startup working on a decentralized financial platform tailored specifically for cryptocurrencies. Our goal is to create a new, highly scalable blockchain that can act as a transaction and identity layer on top of all blockchains. The vision for Herdius is to create the central cryptocurrency financial hub of the space. Since we are developing our own chain as well as are working on brand new technology there will be a lot of room for you to play around with new consensus mechanisms, blockchains, distributed systems design, governance mechanism design, order routing, etc.
Responsibilities:
Implementation and design of Herdius’ consensus algorithm and p2p routing protocol
Writing reusable, testable, and efficient code
Design and implementation of low-latency, high-availability, and performant applications
Integration of data storage solutions as well as distributed data storage solutions
Creation of an efficient crypto exchange orderbook capable of handling thousands of transactions per second
Creation of Governance / voting systems
Working on our distributed virtual wallet network that implements distributed key generation with homomorphic encryption
Requirements:
4+ years of experience as a backend developer, preferably in C/C+, Golang or Scala
Strong proficiency with Golang, preferably including p2p libraries and leveldb (or similar)
Understanding the nature of asynchronous programming and its quirks and workarounds
Understanding accessibility and security compliance
User authentication and authorization between multiple systems, servers, and environments
Efficient integration of cryptographically encryption schemes
Understanding fundamental design principles behind various consensus algorithms
Understanding differences between dPOS, DAGs, Plasma, BFT, aBFT, etc.
Past experience with ANY blockchain / crypto related projects is a huge plus
Implementing automated testing platforms and unit tests
Proficient understanding of code versioning tools, such as Git
Experience with other languages such as Javascript or Python
Strong passion for Bitcoin and other cryptocurrencies
What to send:
Links to your GitHub/Stack Overflow/Portfolio/something awesome you've built that you’re proud of
A resume or LinkedIn profile
Cover letter
At Synergist, we design software to make negotiating legal contracts fun and rewarding. We're making human negotiations machine-readable, creating big data sets of negotiation & behavioural data and extending our reach by integrating with third-party platforms. If we do our job right, our users feel empowered to negotiate contracts and get sh*t done really quickly.
Our team has spent 2 years (and a lot of love) crafting a beautifully simple solution to a complex and boring problem: contracts. 
Therefore we are looking for a backend focused PHP Software Engineer (m/f) who loves to solve complex problems, shares knowledge, takes responsibility and makes pragmatic decisions. As a Senior Software Engineer, you will collaborate with our small and talented team of engineers (PHP, React.js, Go and Infrastructure Engineers) to develop our contract negotiations platform with an eye towards efficiency and scalability. You will focus on the server-side implementation of our business logic, which manages many parts of our system.
What we are looking for:
7+ years of PHP backend development using Symfony/Laravel or similar framework
2+ years of experience with Go or a solid Computer Science background and a desire to learn new stacks
Strong MySQL and database design skills
An understanding of how design decisions affect scalability, storage requirements, and the like
Basic Linux skills
Fluent in spoken and written English
Having one or more of the following is not required but nice to have:
Experience working on a enterprise software at scale
Experience with Go, Docker, AWS, Redis, Terraform
What we offer:
Work with some cutting-edge technologies that are new in the market
A small international team with different skill sets and backgrounds.
Engineering culture: more then a half of the company works in technical positions. Engineers contribute to making product decisions
Bright and spacious office easily accessible by public transportation
Flexible working hours and independent work structure
Choose your equipment
In summary:Â


If you'd like to be part of building an enterprise software company from scratch and responsible for shaping the world's first automated negotiation bot with a bunch of cool people, then get in touch.
Software Engineer collectAI Berlin, Germany €50,000 to €70,000 a year
October 2018
3 Applicants This Week
More Than 6 Months Old
This job posting is no longer available
Job Description
collectAI provides receivables management, covering the end-to-end process from e-invoicing and dunning to debt collection. Focusing on digital communication channels, automation and machine learning gives our solution an edge over traditional approaches. We communicate with customers via their preferred channels, at their favored time and they are able to pay easily. Companies benefit due to higher customer retention rate, reduced costs and improved repayment rates.
collectAI was founded in 2016 and is part of Germany’s largest e-commerce retailer, the Otto Group. Our international team currently consists of 30 professionals mostly working in our Hamburg office.
About the job
We are looking for a (Senior) Software Engineer to join our Berlin based engineering team: You will be creating, improving and operating micro-services written in Go and JavaScript as well as contributing to tools and systems that enable other teams to deploy services quickly and operate them reliably.
Our architecture is currently based on micro-services written in JavaScript, Python and Go. We use NATS for event streaming and utilize AWS' RDS in our persistence layer. Services are deployed in Kubernetes and monitored with Prometheus. We build our frontends mostly with React.
Basic Qualifications
Strong problem solving skills
Good understanding of computer science fundamentals
Passion for clean, simple and robust code
Preferred Qualifications
Experience with Golang and JavaScript
Exposure to Docker, Kubernetes and Prometheus
Knowledge of micro-service principles and best practices
Benefits
An international team of experienced tech and business people
Self-responsibility and encouragement to realize your own ideas
Regularly visit our headquarter in Hamburg's beautiful Hafencity
Shape our Berlin based team as one of its first members
Well-funded and part of Germany's largest online retailer, the Otto Group