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For Freelance

Ref: TSFRONY_1653324124

Front-End Developer With Vue.JS

Sweden, Stockholm

  • Negotiable
  • Developer Role
  • Skills: Vue.JS, Vue, Angular, C#, engineer, developer, Vue, Nuxt, Vue.JS, Nuxt.JS, Typescript, sql, SQL Server, DI I.O.C, RESTful API's, api, testing, consulting, consultancy, developer, senior, c#, leader, intermediate,
  • Seniority: Senior

Description du poste

Frontend Developer - Vue.JS

We are seeking an experienced front-end developer who knows web fundamentals inside and out and has experience working with Javascript Frameworks such as Vue.JS & Nuxt.JS. We are running in a full cloud environment now, so those with experience of AWS or serverless architecture would be preferred, don't worry we wont place you on the backend! In our experience, those with this exposure have the best experience when joining our teams.

What do we do?

We are an up and coming business within the fashion industry, we have carved out a section of the market for ourselves, but we need your support to help us expand worldwide!


* Vue.js / Nuxt.js
* TypeScript
* Storyblok
* Git
* UX + UI best practice knowledge

6+ Years in development required

Within this team you would be playing a vital role where the responsibilities would include:

* Developing our website for a global brand
* Quality assurance of interfaces
* Ensuring code runs on different platforms / different browsers.

This position will be filled very quickly, so if you could see yourself in this role please contact our recruiter at

Jefferson Frank International is the leading Opensource & Cloud recruitment firm, advertising more jobs than any other agency. We deal with both Digital Agencies & End Users Globally and by specialising solely in placing candidates in the market I have built relationships with most of the key employers in the Swedish Market and have an unrivalled understanding of where the best opportunities and jobs are.

Ref: 91774_1654097646

Blockchain Developer - Solidity & Node.Js

England, London, City of London

  • 450 to 500 GBP
  • Developer Role
  • Skills: Open-source software / DeFi / cryptocurrency / agile / Solidity / javascript / TDD / Ethereum / Ethers / web3 / git / Reactjs / Hardhat
  • Seniority: Mid-level

Description du poste

The Role

The client's goal is to build the tools to make the decentralised economy a reality and accessible to all. We have spent a considerable amount of time and resources in building a tooling infrastructure and a consumer-facing wallet to achieve our goal.

The consumer-facing infrastructure framework is packaged as an SDK, Etherspot, which can be included by any dApps, wallets, and services seeking to utilise Smart Contract wallet technologies in their offerings over a multi-chain setting.

My client is seeking an exceptional solidity/full stack developer inherently aligned to our core values.


* Passionate about decentralised applications, open-source software, and DeFi
* Passionate
* An experienced DeFi and cryptocurrency user
* Minimum 1-year experience in a similar role
* Experience in working in an agile environment to quickly iterate and deliver features to users.
* 1+ years of writing code in Solidity
* 2+ years of writing code using js
* 2+ years of experience in software development
* Follow test-driven deployment approach
* Experience building and consuming APIs to interact with other protocols
* Experience with Ethereum development (Ethers, Web3)
* Familiarity with code versioning tools (git) and repo management

Nice to have

* Reactjs frontend development experience is a big plus
* Hardhat knowledge is a big plus

Ref: BFLf200_1654590726

Full Stack Developer(Java script) (Fully Remote) (outside IR35)

England, Greater Manchester, Manchester

  • 500 to 600 GBP
  • Developer Role
  • Seniority: Mid-level

Description du poste

1 Design and build of complex solutions for a web application (end-to-end), preferably in an insurance domain
2 Spring Aspect Oriented Programming (AOP), microservices architecture design, build and implementation
3 Experienced with event-driven frameworks such as Kafka, Catapult (AWS SNS, SQS, DynamoDB), RabbitMQ, or IBM MQ or any similar technology
4 Design and implementation of container-based REST APIs using container frameworks like OpenShift, or Docker
5 Experienced with DevOps continuous integration and continuous delivery tooling eg Gradle, GIT, GitHUB, GITLab, etc. and ability to perform developer-owned Devops tasks
6 estimating T shirt at epic level and story points at story level
7 Leading and representing the team in planning and estimating activities
8 Automated testing, Test driven development (TDD)
9 Agile methodology
10 Leading code and design reviews to ensure smooth daily operations and accurate planning at a team level
11 Create and maintain technical documentation
12 Strong drive for Clean Code, Automation tools, Design improvements and Code quality (via Unit testing)
13 Overseeing and governing coding best practices and design patterns
14 Level of Experience:

8+ years of software engineering/development experience utilizing Java

6+ Years of large scale Enterprise Software Development.

4+ years in REST frameworks with focus on API development with Spring Boot or any similar integration pattern, integrating with backend services like Java Messaging Service (JMS), Java 2 Connector (J2C), Object/Relational Mapping (ORM) frameworks (Hibernate, Java Persistence API (JPA), Java Data Objects (JDO), etc), Java Database Connectivity (JDBC)

3+ years in AGILE methodology (Scrum, Lean, SAFe, etc.)

2+ Years of experience in Docker or cloud-based applications

2+ Years leading development teams and mentoring junior developers


Technology Stack experience:

1 Java/J2EE, Spring , Spring Boot Services
2 AWS - SNS, EC2, S3, Cloudwatch, SQS, Lambda
3 DynamoDB, OpenShift, Docker
4 RDBMS databases like Oracle, MS SQL Server, AWS, RDS
5 Gitlab, Github or any similar tool, Branching and Merging Strategies
6 Hibernate, Jenkins, APIgee, JSON, JSF, XHTML, Tools like Kibana, new relic or similar logging and monitoring tools
7 BDD, TDD. Unit Testing Frameworks (JUnit),Performance testing, API tests, Contract and Component level Testing

Ref: JFIFSE080622TR_1654698760

Full Stack Software Developer

England, London, City of London

  • 450 to 600 GBP
  • Developer Role
  • Seniority: Mid-level

Description du poste


As a Full Stack Software Developer working in the Cyber Security Product team. you will be a crucial part of our team whose role is to design and Implement features that solve our customers' business challenges.

We are seeking a passionate team player that flourishes on delivering challenging solutions in a dynamic environment. Collaborating with other stakeholders, you will focus on designing creative solutions, implementing them and releasing them as part of the software releases that enhance ground-breaking DNS Analytics and Threat Intelligence Platform.


Working within a dynamic and highly innovative team, you will be responsible for maintaining existing platforms as well as developing new features and enhancements. In addition to this, you will have a great opportunity to work with our product owner in order to provide your expertise and input into the development of our next generation platform which will support Governments in the UK and overseas.

As we change our technical stack, you will have the opportunity to showcase your technical skills whilst learning new ones and expanding your exposure and expertise to cloud technologies such as AWS and Kubernetes

In a nutshell, you will be responsible for:

* Developing and maintaining Cyber Solutions products - specifically our ground-breaking Digital Roaming platform
* Work on setting up a new development and production network for an expansion of an existing product.
* Solving complex problems and taking responsibility for key design decisions
* Investigating and engaging with new trends, technologies, packages and libraries
* Packaging software for continuous delivery/deployment
* Working within Agile Environment

Experience required:

In addition to taking pride in your work to develop the best user experience and functionality for our customers you will be technical strong in the following areas.

* Strong programming skills in Java
* In-depth experience of API Development
* UI / UX experience
* Highly proficient with Java script, working with frameworks including React JS
* Knowledge of Python and Angular is a bonus
* Strong knowledge of HTML5, CSS3
* Knowledge of AJAX, current web standards, trends and patterns.
* Database experience at the Back End
* Familiarity with Git version control system
* Experience or exposure to AWS, Kubernetes, authentication will be highly regarded

In addition to these core technical skills, you will also demonstrate :

* Implementation of clean, robust, thoroughly-tested, maintainable, and standards-compliant code (that leverages frameworks where possible) in an agile working environment ·
* Working from a prototype and collaborating with researchers to deliver production-ready systems ·
* Working on a breadth of technologies whilst ensuring a coherent, high-performing solution
* Ability to scrutinise and provide feedback on specifications ·
* Ability to produce documentation that is well-structured and well written


This is a great opportunity for someone who'd like to expand on their knowledge across various languages within a relaxed and supportive environment..

Please send your CV through to and we can book in a first stage call to talk it through!