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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
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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:
Having one or more of the following is not required but nice to have:
What we offer:
In summary: 
 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.
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We're looking for someone who has: - At least 5 years of software engineering experience with open source contributions. - Experience developing, releasing, and maintaining production software. - Significant experience writing Golang or the ability and desire to become proficient in new languages. - A strong grasp of computer science fundamentals. - Deep understanding of the theory and implementation of database trees on real file systems. - Experience working in an agile development environment. - The ability to take ownership and see initiatives through. - Worked with and mentored junior engineers. - Exceptional communication skills. - Experience working with distributed teams.
What your primary responsibilities will be: - Improve the IAVL codebase by committing DRY, well tested code. - Work with the Cosmos-SDK team to keep the IAVL tree and its proofs well integrated. - Optimize our implementation of the IAVL tree and its proofs. - Research, design, and implement improvements to the IAVL tree, the proofs, and related protocols. - Help formalize the specification of the IAVL tree and proofs and ensure the implementation adheres to the spec. - Develop simulations for testing the behaviour of the IAVL tree under various loads and read/write strategies. - Develop alternatives to the IAVL tree like the Ethereum Patricia Trie that adhere to the same interfaces. - Mentor junior engineers and support the growth and health of the team. - Review pull requests and provide valuable feedback to members of the team and open source contributors.
What we offer: - The opportunity to build the future of the internet. - An exciting role building open source software. - Flexible work schedule. - At least 4 weeks of paid vacation. - Very competitive salary, including equity.
About our application process: Qualified candidates can expect to go through a 4 step interview process. The first interview will be a call to assess cultural fit and to make sure our goals are aligned.
If we think there is a good fit, you'll have a call with one of our project managers to learn more about your skills and attitudes toward teamwork. If it's clear that you'd be a good addition to the team, we’ll ask you to complete a technical task for which you will be compensated.
If your technical task displays a high level of quality and care we will set up a final interview with our CEO or CTO.
The process can take up to 3 weeks.
How to apply: https://goo.gl/forms/jpdRI1wD8pdfoqKl2
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We're looking for someone who has: - At least 5 years of software engineering experience. - Significant experience writing Golang. - Built an open source framework for software development. - Significant open source software contributions. - Experience working in an agile development environment. - The ability to take ownership and see initiatives through. - Worked with and mentored junior engineers. - Exceptional communication skills. - Experience working with distributed teams.
What your primary responsibilities will be: - Improve the SDK codebase by committing DRY, well tested code. - Work with the SDK team to triage tickets and move the project forward. - Review pull requests and provide valuable feedback to members of the team and open source contributors. - Mentor junior engineers and support the growth and health of the team. - Help with developer adoption by supporting projects using the SDK. - Participate in developer discussion forums and work to improve the usability based on user feedback. - Promote the SDK by publishing blog posts and guides.
What we offer: - The opportunity to build the future of the internet. - An exciting role building open source software. - Flexible work schedule. - At least 4 weeks of paid vacation. - Very competitive salary, including equity.
About our application process:
Qualified candidates can expect to go through a 4 step interview process. The first interview will be a call to assess cultural fit and to make sure our goals are aligned.
If we think there is a good fit, you'll have a call with one of our project managers to learn more about your skills and attitudes toward teamwork. If it's clear that you'd be a good addition to the team, we’ll ask you to complete a technical task for which you will be compensated.
If your technical task displays a high level of quality and care we will set up a final interview with our CEO or CTO.
The process can take up to 3 weeks.
How to apply: To apply, please fill out this form: https://goo.gl/forms/jpdRI1wD8pdfoqKl2
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WHO YOU ARE: - At least 5 years of programming experience. - Significant experience with Golang. - Extensive understanding of the Ethereum state machine, including the EVM, transaction structures, state mechanics, etc. - Experience with the go-ethereum or parity codebase. - Expertise in blockchain technologies. - Experience working in an agile environment. - The ability to take ownership and see initiatives through. - Worked with and mentored junior engineers. - Exceptional communication skills. - Experience working with distributed teams.
WHERE YOU ARE: - Berlin - San Francisco - Toronto
ROLES/RESPONSIBILITIES: - Develop, maintain, and extend Ethermint - the EVM implementation on Tendermint Core - Develop Plasma-style sidechains for Ethereum - Develop Cosmos-Ethereum peg zones - Contribute to go-ethereum to improve its modularity and usability as a library - Help formalize the specification of Ethermint and ensure the implementation adheres to the spec. - Mentor junior engineers and support the growth and health of the team. - Review pull requests and provide valuable feedback to members of the team and open source contributors.
WHAT WE OFFER: - The opportunity to build the future of the internet. - An exciting role building open source software. - Flexible work schedule. - Travel stipend for conferences and in person collaboration. - At least 4 weeks of paid vacation. - Very competitive salary, including equity.
ABOUT OUR APPLICATION PROCESS: Qualified candidates can expect to go through a 4 step interview process. The first interview will be a call to assess cultural fit and to make sure our goals are aligned.
If we think there is a good fit, you'll have a call with one of our project managers to learn more about your skills and attitudes toward teamwork. If it's clear that you'd be a good addition to the team, we’ll ask you to complete a technical task for which you will be compensated.
If your technical task displays a high level of quality and care we will set up a final interview with our CEO or CTO.
The process can take up to 3 weeks.
HOW TO APPLY: To apply, please fill out this form: https://goo.gl/forms/jpdRI1wD8pdfoqKl2
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With Glassnode we are bringing transparency to the blockchain and cryptocurrency space. Glassnode builds applications that provide new ways of delivering crystal clear insights into blockchains and cryptocurrencies.
At its core, Glassnode is a data analytics tool that aggregates and visualizes a large number of different data sources. With a particular focus on blockchain data and user-centric interfaces, we aim at delivering intelligible, actionable and unique insights from the crypto world, helping investors to make educated decisions in the overly emotional and irrational market, as well as equipping blockchain teams with valuable insights on their projects and tokens.
The Role
We are searching for a driven and proactive backend engineer with a strong DevOps experience ready to contribute in taking the existing product to the next level. You would be expected to take over multiple DevOps tasks, contribute to the development of APIs, microservices, and new features, all in the context of a distributed system with a high load of data from blockchains and cryptocurrencies.
We would like to hear from you, if:
Your Choice
Joining the project, you embark on a challenging journey shaping the innovative product in a revolutionary sphere of blockchain and cryptocurrencies. You’ll have a chance to develop professionally and personally, work on unique and challenging problems of data collection, distributed systems, and high scalability.
What we offer
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We are looking for Senior Software Engineer to join our office in Berlin. We’re a team of 5,000 ambitious, curious people building marketplace platforms that make it super easy for anyone to buy and sell almost anything, boosting local economies.
What you will be doing: • Working in a small, cross-functional team of about 5-7 people (product, data engineering, front-end, back-end, DevOps) • Have impact on the direction of the product, not just the technology side (a sense of ownership is not only allowed, but expected) • You’ll be writing maintainable, testable and performant code in a Continuous Integration Environment • Research, suggest and implement new solutions to our problem domain • Thinking about and acting on data management solutions • How to improve the architecture and split the different domains into microservices
Who we’re looking for: • Has senior-level experience with any state of the art back-end technology. Current tech stack includes Go, Python, Node and JVM — if you’re the candidate for us, you will pick up these technologies quickly, or convince us we should be using something else. • Worked in Agile environment (Kanban, Scrum or XP) • Knows PHP on at least average level • Was exposed to TDD or BDD • Takes ownership and can work independently • Who worked in high-traffic, high-volume, cloud applications • Sees the differences between SQL and noSQL databases
What we’ll give you: • Contributing to the global OLX Group • International career and travel opportunities • Work with an international team of top engineers learning from one another • A budget for conference and education • Competitive salary and great benefits • Home Office possibilities • Company Mobile phone • Any tool you might need MacBook Pro, Notebook, PC (selection of Dells and Thinkpad machine) • Free coffee, snacks, and drinks • Great office location around the corner from Berlin Hauptbahnhof What you need to know about us: • OLX is the world’s leading classifieds platform in high-growth markets. It’s available in more than 35 countries and in over 50 languages. The platform makes it so easy to connect people to buy, sell or exchange used goods and services. • OLX is part of the OLX Group, a global product and tech company with 17 brands, +40 countries, +5000 people and one mindset. • Our mission is to make it super easy for people to buy and sell almost anything, boosting local economy • We are proud to be different, and we work differently too. We combine the spirit and agility of a start-up with the maturity that comes from being part of a 100 year-old company. • We are curious, ambitious and allergic to corporate interference. We improvise, experiment and push each other further, embracing uncertainty and driving change.
If you’d like to learn more about the OLX Group take a look at the other parts of our website or reach out to Sebastian. And remember, we are an equal opportunities employer.
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Our goal is to replace the physical key and to revolutionize key management. Our smart access-as-a-service solution KIWI allows users to unlock doors completely hands-free with our identity token KIWI Ki or by using our KIWI App. Our customers from the real estate industry use the KIWI Portal to simplify key management. And service providers like Deutsche Post and waste management companies open the doors of apartment buildings with KIWI. More than 47.000 households in 15 cities are already connected to the KIWI Infrastructure.
Our development team is an interdisciplinary mix, covering the full range from hardware and firmware development through systems, web, and mobile. Our highest priority is safeguarding the privacy and security of our users. We believe that it’s possible to have a connected system without gathering huge amounts of information on the private lives of our customers. As a result, we have developed our whole system almost entirely in-house, using cutting-edge cryptography, an innovative wireless sensor network, and an open-source approach.
YOUR ROLE
The role of the SRE at KIWI is to allow for the business to make changes quickly and safely within the company. Your role includes: - Working with the business to translate business requirements into technical implementations. - Designing and building tooling and process patterns to be used by the rest of the Engineering team. - Maintain production and test environments.
YOUR SKILLS
WE OFFER
Join our talented team and be a part of the KIWI story! We are looking forward to receive your application. Please apply here: https://kiwi-jobs.personio.de/job/13157#apply. Your contact person is Charlotte.
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We're looking for someone who has: - At least 5 years of software engineering experience with open source contributions. - Written structured, high-quality programs and scripts for automation. - Significant experience writing Golang or the ability and desire to become proficient in new languages. - Experience developing, releasing, and maintaining production software and infrastructure tools like Elastic stack, InfluxDB stack, DataDog, PagerDuty, or VictorOps. - Built solutions with a broad set of technologies in and around cloud solutions (AWS EC2, ECS, Route53, DynamoDB, RDS, Lambda, Docker, - Google Container Engine, Kubernetes or Docker Swarm). - Implemented continuous deployment before (Jenkins, CircleCI, Travis, Ansible, Chef, Puppet). - Experience with SDLC tools (Git, GitHub, Atlassian Stash/Bitbucket, GitLab, JIRA). - Experience with QA/SIT tools (Selenium). - Experience in Linux System administration including package management, network management, and security management. - Familiarity with open source P2P networking protocols. - Experience working in an agile development environment. - The ability to take ownership and see initiatives through. - Exceptional communication skills. - Experience working with distributed teams.
What your primary responsibilities will be: - Help scale software systems with automation, in an effort to improve reliability, velocity, and simplicity. - Create, maintain, and improve the tooling for continuous integration and continuous delivery. - Build and maintain tooling for deploying, monitoring, and maintaining clusters of Tendermint nodes on our testnets and mainnets. - Build and maintain tooling to help shorten feedback cycles within teams and projects. - Plan, build, and maintain public facing services in association with business goals. - Build tools to measure and monitor availability, latency and overall system health.
Apply : https://goo.gl/forms/jpdRI1wD8pdfoqKl2
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Beaconinside is a startup based in the center of Berlin. Our goal is to build the next generation of indoor location services, connecting the Online and the Offline. We develop our own iBeacon hardware and software solutions to help companies enrich their iOS and Android mobile experiences with location-based content. This way offline customers will become mobile users, and mobile users will become customers.
Beaconinside was founded by experienced mobile and retail experts. We are now looking for technical talent - a Golang or Mobile wizard - for immediate hire to support our passionate engineering team in Berlin.
Your Responsibilities • Heading the software development of our campaign management platform, based on best-in-class Google cloud platform technologies. You will directly report to the CTO.
• Lead cross-platform initiatives to align mobile, web and backend development
• Responsible for the overall software architecture and connecting the dots between our iBeacon hardware and firmware, the backend services and our mobile APIs and SDKs
• Work with engineers, product management and QA to develop and meet functional and nonfunctional requirements on schedule
• Take ownership about setting up a learning development organization, i.e. coordinate workshops, hackathons and conference visits.
• Manage junior software developers and coordinate code reviews and pair programming
• Support rollouts and be available for on-call duties to resolve production issues
• Write clean, well-structured and maintainable code
• Investigate new technologies and development methodologies