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My client is building a decentralized application allowing users to trade Bitcoin on Layer 2 in a permissionless and censorship-resistant way. It allows users to leverage Bitcoin up to 5x, and earn interest, without sacrificing their security or privacy. They are looking for additional developers to aid in constructing the Core system functionality and development of new features.

Key Responsibilities

* Develop and test smart contracts related to lending, borrowing, trading, bridging and governance
* Review contracts of team members for logic flaws or security issues
* Research and concept work for new features or improvements to the system
* Coordinate the development of new features within a small team
* Development of backend services connected to the smart contracts - Node.js

Skills

* Solidity
* web3
* Test framework: ideally hardhat, but truffle experience is also acceptable
* Strong sense of security. Knowledge of common vulnerabilities in smart contracts and blockchain development in general.
* Preferably Node.js, Golang and Java
* General Blockchain experience
* Preferably Bitcoin experience
* Minimum 2 years Solidity experience
* Minimum 5 years Development experience

Requirements:

SENIOR GO DEV

We want to emphasise that we don't expect you to meet all of the below but would love you to have experience in some of these areas.

* 5+ years experience working with GoLang

* Experience designing systems (Architecture and Design)

* Ability to work autonomously given high-level requirements

* Experience with relational databases (PostgreSQL, MySQL) and key-value stores (DynamoDB, Redis)

* Pride in readable, well-designed, well-tested software

* Experience with services / micro-service architecture

* Must be willing to work with a Ruby codebase (knowledge of Ruby a strong plus)

* Willingness to learn new languages & tools

Not mandatory, but would be nice to have:

* Experience with web architecture at scale (20krpm and above)

* Ruby and React knowledge will be a plus

* Experience solving logistical problems with software

* Experience with AWS

* Experience leading a team of developers

* Experience dealing with stakeholders

* Experience with DataDog and other metric/tracking systems

£550-600 a day

6 month contract

We are partnering up with one of our trusted clients to assist them with bringing on board a skilled Node.js Developer with a primary focus around Node.js, AWS Lambda functions and using Serverless framework.

The engagement will be fully remote with a very high chance to extend long term, ideally you will be available in a few weeks but prepared to wait for the best option.

We are looking for a skilled developer that has excellent commercial experience with:

* Node.js (highly proficient)
* AWS services including SNS, SQS, Route 53, CloudWatch / API Gateway (highly proficient)
* Lambda Functions including Step Functions (highly proficient)
* Microservces achitecture
* Serverless framework

Nice to have's:

● Knowledge of Terraform, CI/CD piplelines

● Integrations experience (e.g. with Point of sale (POS) systems like Aloha and Micros, Deliveroo, Glovo or Flux.



The following is also an advantage:

● Working in an Agile framework before i.e. Scrum & Kanban

● Experience of QA/Test frameworks such as Selenium, load testing (Blazemeter), unit testing (Mocha/Chia) etc.



Other attributes desired:

● Team player

● Good communication skills

● Positive can-do attitude



Please get in touch with me at l.porter@jeffersonfrank.com to discuss further.

Senior Rust Developer Outside IR35!



Jefferson Frank are working with a leading organisation experiencing exponential growth, our client is currently hiring a strong, experienced developer. Interviews happening this week!



Blockchain | Developer | Rust | Web3 | Ethereum | DeFi



Key Points:



* Looking for a Rust Developers
* 6 Months Contract
* Well versed in Ethereum
* Well versed in Blockchain
* Well versed in DeFi
* Fully remote from Europe
* 2 years Minimum experience
* Outside IR35

If this role is tailored to you, get in touch with my details below...

☎️ 0203 879 8394

📧 t.roberts1@jeffersonfrank.com

Blockchain | Developer | Rust | Web3 | Ethereum | DeFi

My client premise is building a product to help these investors and institutions discover, assess, and execute transactions and trading strategies on DeFi, without having to navigate the complexities. All the data aggregation, transaction construction, smart contract handling, and execution overhead is handled by the product, while still non-custodial, leaving the investment professional to do what they do best.

you will join our team in building a revolutionary new interface for interacting with DeFi by building the core engine that speaks to the plethora of smart contracts across multiple blockchains.

requirements:

* 3+ years of experience in software engineering
* Designed, build and shipped production smart contract code to at least one blockchain on mainnet e.g. Ethereum, Tezos or Polkadot
* Experience with a language like C/C++, C#, Rust, Elixir, Java or Go
* Understanding of the current DeFi ecosystem (Curve, Balancer, Uniswap, Yearn, Aave, Synthetix etc). You have ideally used and integrated these protocols before
* Experience with Blockchains and how they work (such as Bitcoin, Ethereum etc)
* Designed, built and shipped complex, highly reliable and secure applications in finance or similar space either by yourself or as part of a team
* Understanding of best practices around developer experience, CI/CD and what a great release process looks like

AWS Developer

Contract till Febuary 2022

Start ASAP

Rate: €100 p/h



Client called in driectly for help with existing project, spec is below:



AWS + Terraform IaC

- TypeScript, React + Redux
- Robust and intensive backends using JVM based languages (eg. Kotlin or Java)



Any questions please email directly to (John) j.maclean@frankgroup.com

DeFi Developer Outside IR35!



Jefferson Frank are working with a leading organisation experiencing exponential growth, our client is currently hiring a strong, experienced developer. Interviews happening this week!



Blockchain | Developer | DeFi | Web3 | Ethereum | DeFi



Key Points:



* Looking for DeFi Developers
* 6 Months Contract
* Well versed in Ethereum
* Well versed in DeFi
* 500-550 A Day
* Fully remote from Europe
* 2 years Minimum experience
* Outside IR35

If this role is tailored to you, get in touch with my details below...

☎️ 0203 879 8394

📧 t.roberts1@jeffersonfrank.com

Blockchain | Developer | DeFi | Web3 | Ethereum | DeFi

Jefferson Frank is searching for a Front End Developer to work with a Medtech company based in London and the EU. This is a short term project delivering a piece of work for them. Exposure to Node.JS will be beneficial.

The project will run for 6 weeks with delivery for mid September. There may be an extension for a version 2.

The client has user stories and screens in Figma. They are delivering a standalone application so it can be in React or Vue. Integration with a simple AWS Amplify back-end for data storage/retrieval.

Requirements

-AWS commerical exp

-React/Vue expert

-AWS Amplifi

-Experience with Unit Testing.

-Experience in developing back-ends with NodeJS, possibly using TypeScript.

-Good JavaScript skills.

-Familiarity with Typescript.

-Experience with any modern JavaScript framework (Ionic, Angular, React, Vue), libraries and tooling.

-Highly motivated and experienced professional focused on creating an energised environment

-Ability to adapt to changing conditions and unexpected obstacles, modifying work methods to accomplish goals.

-Good level of English

Job Type: Full time, contract

If this profile sounds like you, please get in touch for a confidential conversation with one of our consultants.

Full Stack Developer - Sweden:

Location: Flexible as long as you're located in Sweden.

Start date: End of August/Start of September.



Job Description:

My client is looking for a Full Stack Developer to work within a small and close-nit development team. My client is based in Stockholm and is investing into their development structure currently, looking to add to their current team to deal with the work demands they currently have and current back log of work. The perfect candidate is one that likes to stay up-to-date with the latest technologies.



Role & Responsibilities:

* Working in a fast paced, agile environment.
* Being able to deal with scenarios on the spot.
* Being able to work the full-cycle of the project.
* Offer guidance to the junior members of the team.

Skills & Qualifications:

* Good level of experience in Java is a must.
* Experience within Java 11 is a bonus.
* Experience in Azure is a bonus.
* A detailed knowledge of HTML and CSS.
* Knowledge of Kubernetes, Docker and Jenkins is a bonus.



Does this sound of interest? If so apply to this advert or email me on +46 77 588 86 04 c.willis@jeffersonfrank.com to discuss this further.



Also, feel free to reach out to me on LinkedIn at: https://www.linkedin.com/in/connor-willis-4669b8174/



#java #azure #fullstack #sweden #contract #consultant

Jefferson Frank are currently looking for a Senior Full Stack Developer (Python/Django/Developer/Architect) to join a consulting company on a contract basis until October with a good possibility of extending.

Requirements

* We need someone who is SC cleared or has been previously and can start immediately.
* Previous experience architecting enterprise software solution
* Experience in front and back-end development, comfortable with web development and who is very hands on.

Key responsibilities

This is a great opportunity for an experienced full stack developer to take both an architect and hands-on development role. As you will be the only developer focused on this MVP, you will not just be focused on one part of the process, so being able to see the big picture and work collaboratively with the broader team to understand the user insight and data feeds is critical. Key responsibilities include:

· Development with Python & Django.

· Architecting enterprise software solutions.

· Conveying effectively all task progress, evaluations, suggestions, schedules along with technical and process issues.

· Coordinating with developers and data engineers, keeping the Project Manager well informed of the status of development effort and serving as liaison between the developers and Project Manager.

· Collaborate with the User Experience (UX) team to build user insights into the proposed solutions.

· Deployment of projects in line with GDS standards.

· Being proactive, and sharing ideas based on the best practices in web and software development.

The project they will be going on is for a major government department, they will be the only developer working alongside a multidisciplinary team. This is a remote contract which is outside of IR35.

Knowledge & Experience

· Experience with Python.

· Experience of Django/ Jinja / Flask.

· Proven experience with Front End Development (HTML5, CSS3, JavaScript).

· Strong experience writing documentation and building unit tests.

· The ability to work independently on a new tool according to detailed specification and design.

· Experience with CI/CD pipeline and tools.

· Experience working in a Scrum/Agile environment.

· Proficient understanding of code versioning tools (Git).

· Experience on large-scale projects involving complex datasets.

· Self-starter, lead and self-sufficient architecting enterprise software.

· Experience of working to GDS standards.

If this profile sounds like you please get in touch for a confidential conversation with one of our consultants.

Job Type: Full time, contract