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Principal Developer

England, London, City of London

  • £100,000 to £130,000 GBP
  • Developer Stelle
  • Fähigkeiten: Java, Springboot, Microservices, Docker and K8S, Angular, React, Express, MongoDB, NodeJS, JavaScript, Typescript, C# .NET, ASP.NET .NET Core, Spring, SQL, MongoDB, SQL database, Data Engineering, Hadoop, Spark, PySpark, Hive, Python/Java, Kafka
  • Seniority: Senior


Principal Developer - Up to £130k + Bonus

Want to work with Apple, Microsoft, PWC?

My client is a global leader in next-generation digital services and consulting. They enable clients in more than 50 countries to navigate their digital transformation. With over four decades of experience in managing the systems and workings of global enterprises, they expertly steer clients through their digital journey.

They have designed the Power Programmers career track for polyglots who are passionate about programming and want to do more than programming as usual. They are looking for highly skilled Principal Technologist, who will be working on emerging and next-gen technologies.

In this role, you will build platforms, marketplaces, innovative solutions, contribute and develop open software. will collaborate with some of the best talent in the industry to create and implement innovative high quality programming solutions. You will be part of a learning culture, where teamwork and collaboration are encouraged, excellence is rewarded, and diversity is respected and valued.

Job Description

* Have Knowledge of advanced Tech ecosystems / landscapes
* Have the ability to define Architecture , Design , Code and test.
* Drive Innovation at organization and industry level ✓ Drive Strategic thinking & provide direction ✓ Inspiring Transformation
* Design and Develop platforms to Deliver non linear growth. ✓ Contribute to Strategic platforms, OS and Solutions.

Technical Skills

Over 12 years of core development experience in any of the below stacks

* Application Development in one of the following:

* Java, Springboot and Microservices, Angular/React, Docker and K8S
* Angular/React, Express, MongoDB, NodeJS, JavaScript and Typescript.
* C# .NET,ASP.NET .NET Core, Spring.NET, SQL,HTML5, CSS3, MongoDB/Any NoSQL database, Angular, ExpressJS, NodeJS

* Data Engineering
* Hadoop, Spark, PySpark, Hive, Python/Java, Kafka, Airflow and Beam.
* AI Engineering


* Experience in developing and deploying Microservices
* Understanding of OO concepts and design patterns
* Experience in cloud based platforms
* Expert in architecting large scale distributed systems with HA (High Availability)/DR (Disaster Recovery) and low latency.
* Experience in Open Source tools and technologies
* Experience of working in a fast paced and agile environment
* Providing solutions with minimum system requirements and in Agile Mode

Fullstack Developer - Green Sector - Remote flexibility

Belgium, Brussels

  • €3,000 to €4,600 EUR
  • Developer Stelle
  • Fähigkeiten: Javascript, React, Node.js, MongoDB, PostgreSQL
  • Seniority: Mid-level


Full stack developer

GreenTech SaaS

Product development - Brussels

Sustainable sector

About the company :

The company is a fast-growing start-up specializing in the green sector. The mission of this start-up is to deliver a software aimed at calculating the emissions of companies in Belgium, the environmental impact they have and, also, how to become more sustainable. Thanks to their software, companies can match the quotas of the European Union's for environmental policies. For the moment, they are 20 employees and, by mid-2023, they would like to expand their team to 50 people.

This start-up is evolving with the latest IT tools, working with AI, machine learning and AWS cloud! They also have a very mature vision and modern approach, offering great flexibility of remote work, an harmonious team and many other benefits!

At the moment, they are looking for a full-stack developer who's mostly Backend-oriented, to join the team on a permanent basis.

Skills Required :

* Strong knowledge of Typescript with Node.jsforthebackend and React.jsforthefrontend.

* Ideally, a minimum of 4-5 years of experience with Node.js - as the emphasis is on the backend - and 2+ years of experience with React.js

* Experience of 2-3 years with MongoDB and/or PostgreSQL.
* Experience operating in an AWS Cloud environment is a big plus but not mandatory.

Education : Bachelor's degree in computer science or equivalent

What they offer :

* Flexible remote days so you can work from wherever you want in Europe. They offer you this flexibility, but they would prefer someone who's willing to come to the office sometimes every month, for the team bonding and company culture.
* Meal vouchers, insurance group and individual, eco-checks, net allowance
* They do not provide a car as they want to keep the green mentality! However, they offer a minimum of mobility allowance of 600€ net cash
* Monthly gross salary well-tailored to the current market in Belgium.

If you would like to have a first ''coffee call'' with the head of technology, let me know, Yorgos Christofakakis at g.christofakakis@Jeffersonfrank .com. The hiring process is very fast and to-the-point!

iOS Developer - Limburg - 5000€ - 3xRemote

Belgium, Limburg, Hasselt

  • €4,000 to €5,000 EUR
  • Developer Stelle
  • Fähigkeiten: iOS, Swift, AWS, GCP, Azure
  • Seniority: Mid-level


iOS Developer

Up to 5000 €

Market Leader Product Development Company

3 x Remote



There is a Belgian scale-up in the area of Limburg, a company that is a pioneer and market leader in their area of specialization, which is currently looking to hire iOS Developers to assist them with their increased client portfolio. They are a niche specialist in a cool industry that everybody is interested to work in and their products are internationally popular, being used from big players of the industry, both in Belgium and worldwide.
The company is creating complex, next-generation software products for this cool industry, and helps their clients who are using it to optimize their operations, save time, money and increase their safety. They are pioneers in the industry they work on, and their vision is to bring digital revolution and make everything paperless , in a field where this is not the case. Innovative, modern and smart, they're constantly improving their products, based on their clients' and the industry's needs. On the human aspect, the company is putting value to their people; everything is based on trust and open communication , so if you want to work in a market leader product company while feeling that you belong in a family, this is your chance to grab!

The role and responsibilities

The client is looking for ambitious iOS Developers, to help them improve their products and their mobile apps. You will be working on the company's Mobile Apps, used by their users worldwide to process information and communicate with their operations department. You will work closely with the Product Owner and UX designer to translate new requirements and designs into code to continuously improve their apps.

The most important is to have the right mindset, ambition and to enjoy what the company is doing. They want active contributors to join a modern environment with the latest tech-stack and the experience needed is at least 2 years. In this position, you will be able to work together with other teams in a collaborative environment.

The right person will be able to demonstrate

* At least 2 years of hands on experience in iOS Development.
* Solid knowledge in Swift.
* Result driven, positive and collaborative mindset.
* The company is using AWS, so it's always a big plus if you have some knowledge or previous experience with AWS. If not, this is not a problem at all.
* Fluency in English If you have notions of Dutch that's a big plus!
* Willingness to be part of a pioneer of the industry.
* Willingness to be part of a young and collaborative team.
* Trustful and honest character who wants to actively contribute to what the company is doing.
* Genuine interest in the company and their sector.

Seniority level comes last, so the soft skills are very important. The company is hiring the attitude/character and they train the skills, as they are saying.

What you should expect

* Base salary of up to €5,000/month, tailored to your level of experience and expectations.
* Bonus allowance
* Vacation allowance
* Training budget. Both in hard skills and soft skills.
* Flexible work hours.
* Individual coaching.
* 32 days of holidays.
* All standard benefits in Belgium, including a company car and a fuel card.
* 3 days remote/week even after Covid. If you prefer to have less remote , this is also an option of course.
* Frequent performance evaluations and growth opportunities within the company.
* Flat culture/structure, no micromanagement and open communication is the core of their business.
* A company that will put value and support you on a personal level, being there for you if needed. It may sound like a cliché, but there is family-like atmosphere where they take good care of their people, in every aspect.

Sounds good?

If this sounds good to you, don't lose time and contact me, Manuel Rodriguez and send me an email to m.gil@jeffersonfrank.com and I'll be glad to give you more details.

Senior Golang Developer - 105K

England, London

  • £70,000 to £100,000 GBP
  • Developer Stelle
  • Fähigkeiten: Golang, AWS, GCP, SQL, Remote
  • Seniority: Senior



Salary: Up to 105K (based on experience)



We are a software-enabled services provider, synonymous with SAP on Cloud, focused on delivering superior, highly automated Managed Services to Enterprise customers. Our customers span multiple verticals and geographies across the Americas, EMEA and APAC. We partner with AWS, SAP, Microsoft and other global technology leaders.


* Knowledge of several of the following areas is desirable: AWS, Azure, GCP, GoLang, HTML, SQL, .Net
* Experience with databases and Object-Relational Mapping (ORM) frameworks (e.g. Hibernate)
* The ability to communicate complex procedures to other colleagues
* Commercial and business awareness
* Good communication skills - both written and verbal
* Attention to detail and desire to probe further into data
* Major cloud hyperscaler (AWS, Azure, or GCP) with Golang experience is a must for this role


* Research, design, implement and manage software programs
* Ensure that our PaaS Platform continues to scale exponentially
* Run the PaaS Platform itself with minimum cost while providing maximum customer value
* Enable a constantly growing number of internal and external contributors
* Architect, develop, rollout and support additional services or capabilities
* Rollout our platform globally
* Constantly learn and discuss together with other smart people on what is best for our customers
* Experiment with new Cloud Services provided by AWS, GCP, and/or Azure that might create value for our products
* Develop well designed, testable efficient features and improvements in modern object-oriented or functional software language
* Participate in code reviews and advocate for best practices and conformance with internal software quality standards and non-functional requirements

This is an exciting opportunity for someone who'd like full automony within a role, making architectural decisions with a team of elite developers..


Please send your CV through to e.ayre@jeffersonfrank.com and we can book in a first stage call to talk it through!

Jefferson Frank is the Amazon Web Services (AWS) recruiter of choice. We work with organizations worldwide to find and deliver the best permanent and contract AWS DevOps, Big Data, IaaS and PaaS, and AWS Security professionals on the planet. For more information, visit jeffersonfrank.com.

Web Developer


  • Up to €5,000 EUR
  • Developer Stelle
  • Fähigkeiten: Angular or AngularJS skills (TypeScript), HTML, CSS, JSON, REST, BitBucket or Git, C# or Java,
  • Seniority: Junior


Your work is software development and consists of developing new features and maintaining the current application. They expect you to have good code reading skills, team spirit, a desire to share your know-how and document your work, and the ability to make an easy-to-maintain software product that serves customers. Their team's software developers are full-stack developers, but they're especially looking for experts on the frontend side. The position requires good knowledge of the English language, as daily communication and tasks are in English.

They expect you to have the following qualities:

* Competence and work experience in web application development
* Angular or AngularJS skills (TypeScript)
* Knowledge of version control tools ( BitBucket or Git)

They look to your advantage if you have the skills to:

* from C# or Java programming
* XML parsing or StanForD data transfer standard
* from map components or libraries such as OpenLayers
* About unit testing
* SQL about spells

This role will be moulded to take advantage of the candidates technical skills.

Developers have the chance to mould the role on their strengths.

Genuine opportunities to relocate to their international offices in the future.

Big international company with the flexbile and freedom of a SME.

Interesting new technologies and brand new SaaS products under construction internally (AWS).

Good working and positive atmosphere.

My client is looking to begin the interview process immediately so feel free to apply now!

This is a brief description of the role, for the full information, simply apply to the role and I will call you to discuss.

Twitter: @_JeffersonFrank

LinkedIn: https://www.linkedin.com/in/jason-upton-167479231/

Email: j.upton@jeffersonfrank.com

Phone: +358 75 3266673

Please Note: This is a permanent role. This role does not offer Sponsorship. You must have the right to work in Finland with no restrictions. Some of our roles may be subject to successful background/security checks.

If this wasn't exactly the role you were looking for, please apply to this role anyway, just highlight what you are looking for, apply with your CV with a brief overview of what you are looking for (The role, top 3 techs, location, salary).

I will call you to discuss your skill-set further, there may be other roles I am working on that you may be suited for.

I specialise in Mobile, Web and Cloud (AWS) recruitment here at Jefferson Frank International, focusing on the placement of highly-skilled candidates in various IT positions (Engineers, Analysts, Architects, Consultants, Project Managers, Management etc.).

We are the only global recruitment agency dedicated solely to AWS technology. Jefferson Frank is the AWS recruitment agency of choice. Whether it's a contract, permanent or remote position, we find great people great jobs.

Software Developer - BioTech SaaS - 4.500€ - Full Remote

Belgium, Brussels

  • €4,000 to €5,000 EUR
  • Developer Stelle
  • Fähigkeiten: Python, NodeJS, ReactJS, .Net, C#
  • Seniority: Mid-level


Software Developer

Python & Angular/Typescript

Product Development - SaaS

Flemish Brabant

How do you define sexy?

For us, making a positive impact through our work is sexy. In a product development organization in the Flemish Brabant, there is a team of visionary developers who is developing a data management platform addressed to those professionals whose work is to cure cancer and treat genetic diseases. How do they do that exactly? By creating a software solution that assists them in managing and analysing the already complex production processes these therapies require.

* We're looking for a motivated developer who has enjoys hands-on work and working side-by-side with the CTO and the dev team. The ideal candidate has experience with:
* Python to use for backend development and data analytics. A nice bonus is Django.
* Frontend skills in Typescript/Angular for the beauty of the frontend part.
* Fluency in English and an academic degree.
* Energy and perseverance!


1 We're not looking for specific years of experience, the role is open to all seniority levels.
2 If you are an experienced backend developer with Java or .Net and you wish to transition to Python, we're still happy to see you.
3 The backend skills are more important than the frontend. If you don't really do frontend, feel free to still apply.

On top of the technical skills, the ideal developer enjoys a stimulating working environment, is highly motivated, and aspires to become a key-player in the growth of the company, which is guaranteed that will result to his/her personal growth as well.

The role offers:

In-house work, flexible hours and full remote flexibility (2-3 times per month on-site for important company meeting). And of course, a competitive salary (usually up to a range of 3700 - 4500 tailored to your seniority level, it could even go higher) and several benefits (all the standards in Belgium, such as net allowance, health & group insurance, mobility allowance or a company car with a flexible income plan arrangement, internet, meal vouchers etc). If you don't need a company car, you can still get the mobility allowance on top of your gross salary, or use it to pay your mortgage or rent.

In this role, be prepared to go deep technical. You'll be improving the quality of the code, the security, scalability etc. In essence, you'll be responsible for setting up and managing projects that will eventually help the bio-tech organizations to develop innovative therapies for cancer and genetic diseases. That's as good as it can get.

Few details about the product

This product development house provides a platform that assists bio-tech organizations with managing process data efficiently. It is a modular Software as a Service for organizations that specialize in biomanufacturing and have lots of data on their plate. Their platform is designed in such a way to help organizations achieve an agile digitisation with increased data integrity and automation. Think about it as the back office of every company. Once the data are collected and structured, the software offers extensive possibilities like, among others, automated reporting, predictive analytics and process comparison.

Interview Process

Apply directly and let's schedule a call for all the details or you can contact me, Manuel Rodriguez, with your latest updated cv at m.gil@jeffersonfrank.com. I will bring you in touch with the CTO for a video interview. If positive, you visit them one time at the office to discuss numbers and meet the team. Starting date is flexible, so, if you're interested, I'm looking forward to hearing from you!

Look forward to speaking with you!

Python Developer

England, Merseyside, Liverpool

  • £50,000 to £60,000 GBP
  • Developer Stelle
  • Fähigkeiten: AWS / Python / Developer / Northern Ireland / Hybrid / Senior / Software
  • Seniority: Senior



Role based in Lisburn/Belfast Northern Ireland

The team mainly implements new features for a growing system consisting of multiple microservices. This system monitors and analyses the state of the electrical grid and sends out alerts when faults or power disruptions occur, helping keep the lights on for end consumers.

One of the main areas of focus is back-end development, however, there will be close cooperation with front-end developers, testers, data engineers and product owners is also required to ensure end-to-end delivery.

Our tech stack:

* Python
* FastAPI and Twisted framework
* Docker
* Linux
* RabbitMQ
* MySQL and PostgreSQL
* C++ (legacy components only)


* Design and development of Python back-end microservices
* Development of automated unit and component tests
* Maintenance of CI/CD pipelines
* Participation in Agile Scrum and design meetings


* At least 3 years' experience in in Python back-end development
* Experience designing and implementing REST APIs
* Experience working with SQL databases
* Practical knowledge of Linux
* Fluency in English, written and verbal


* Bachelor's degree in computer software engineering or equivalent
* Basic knowledge of C++11 or C++14
* Knowledge of Docker
* Experience working with message queue systems, e.g. RabbitMQ
* Knowledge of version control systems, e.g. Git