Full Stack Engineer Jobs

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Full Stack Engineer Jobs

Overview

Looking for top Full Stack Engineer jobs? Explore our curated listings of full stack developer positions across leading tech companies. Whether you specialize in frontend, backend, or both, find the perfect role that matches your skills and career goals. Start your next full stack engineering job search here and take your tech career to the next level!

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Full Stack AI Developer - London

Full Stack AI Developer

London Hybrid

6 month contract

Inside IR35 via Umbrella

Our Pharmacuetical client are looking for a skilled and motivated Developer to help shape the future of generative AI applications, with a strong focus on safety, usability, and technical excellence. This role blends cutting-edge AI/ML development with user research and full-stack integration, offering a unique opportunity to work at the intersection of innovation and impact.

Key Responsibilities

Define and implement safety metrics for generative AI systems, particularly language-based models.

Conduct user research to identify risks, failure modes, and areas for improvement in AI applications.

Integrate AI/ML components with Front End, Back End, data pipelines, and compute infrastructure.

Develop high-quality software following best practices, including active participation in code reviews.

Collaborate with engineers and data teams across functions to build robust, end-to-end data pipelines.

Generate insights from GenAI datasets using machine learning and data analysis techniques.

Qualifications

Experience conducting user research in software development contexts.

Solid understanding of generative AI and large language models.

Proficiency in Python, including testing and development workflows.

Familiarity with agile methodologies and working in agile development environments.

Strong grasp of modern software development tools and practices (eg, Git/GitHub).

Experience deploying AI/ML-powered applications, especially those involving NLP, language models, or agent-based frameworks (eg, LangGraph, PydanticAI, AutoGen).

Background in user research specific to AI applications.

Knowledge of AI/ML evaluation techniques, including safety and robustness assessments.

Experience in web-based Front End development.

If this role is of interest to you - please apply now with an up to date CV!

Carbon60, Lorien & SRG - The Impellam Group STEM Portfolio are acting as an Employment Business in relation to this vacancy.

Perl Software Engineer

We are seeking an experienced Software Engineer with recent, hands-on Perl programming expertise to join a dynamic and forward-thinking organisation. This is a fantastic opportunity to work on innovative projects within a well-established business that is investing heavily in technology, agility, and digital transformation.

In this role, you’ll contribute to software development across a range of critical systems, ensuring solutions are robust, scalable, and aligned to business needs. You’ll work closely with stakeholders, product teams, and third-party developers, delivering high-quality code and collaborating in an agile environment.

What you’ll be doing:

Designing, coding, and delivering well-structured, performant solutions primarily in Perl

Working with Oracle databases, APIs, and integration layers

Supporting agile ceremonies and collaborating with cross-functional teams

Producing automated unit and integration tests

Building relationships with stakeholders and ensuring technical solutions meet business needs

Supporting and mentoring colleagues, while contributing to knowledge sharing

Key skills and experience required:

Strong, recent experience with Perl programming (essential)

Additional knowledge of JavaScript and modern frameworks is advantageous

Experience with architectural design patterns

Agile delivery experience

Oracle database design and development expertise

API integration experience

Git/version control proficiency

Excellent communication and collaboration skills

**Why join?**This is an exciting chance to work for a business at the forefront of its sector, where technology is central to growth and innovation. You’ll be part of a collaborative team where your skills will directly influence the development of products used by thousands of customers.

If you’re a proactive engineer with strong Perl experience who thrives in an agile, fast-paced environment, we’d love to hear from you.

Please be advised if you haven’t heard from us within 48 hours then unfortunately your application has not been successful on this occasion, we may however keep your details on file for any suitable future vacancies and contact you accordingly.

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone’s chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive.

Lead Full-Stack Developer

Lead Full-stack Developer

Location: Holborn, Central London (Hybrid)

Job Type: Full-time

Direct Reports: x5 Senior Developers

Reporting to: Head of AI & Technology

An exciting new permanent opportunity has become available for a Lead Full-stack Developer, to join a juggernaut organisation in the recruitment industry. A highly dynamic, ambitious and fast-growing team dedicated to transforming the recruitment landscape through AI-driven, human-centered technology. This is a pivotal role where you will lead a team of 5 Senior Developers, focusing on hands-on coding and providing technical leadership underneath the guidance of the Head of AI & Technology.

Day-to-day of the role:

Lead and mentor a team of 5 Senior Developers, maintaining a hands-on approach with coding and problem-solving.

Oversee the end-to-end delivery of features, ensuring the software is scalable, speedy, and of high quality.

Architect, develop, and maintain core components of our SaaS platform:

Backend: Python, PostgreSQL

Frontend: TypeScript, NextJS/NodeJS

Integrate AI tools, APIs, and data pipelines to enhance platform intelligence.

Promote engineering best practices such as testing, CI/CD, and secure coding standards.

Conduct code reviews and provide technical mentorship.

Collaborate with the Head of AI and Technology to align development priorities with business objectives.

Foster a culture of collaboration, continuous learning, and high performance.

Troubleshoot and resolve complex issues, ensuring platform reliability and uptime.

Required Skills & Qualifications:

10+ years of commercial software development experience, with at least 5 years in a lead developer role.

Proven track record in leading small, high-performing engineering teams in fast-paced environments.

Deep expertise in full-stack development, including:

TypeScript/JavaScript (NextJS, NodeJS, Tailwind)

Python (Django, Flask, or FastAPI)

PostgreSQL

Experience with building and scaling SaaS platforms in production.

Strong background in software architecture, microservices, and API design.

Hands-on experience with cloud platforms (AWS, Azure, or GCP).

Excellent communication skills, capable of motivating and aligning technical teams.

Desirable: Experience with AI tools, APIs, ML pipelines, containerisation (Docker/Kubernetes), event-driven architecture (Kafka/RabbitMQ).

Benefits:

Hybrid working model (minimum 3 days a week in office)

25 days annual leave plus bank holidays

Flexible holiday scheme

Contributory pension scheme

Enhanced family leave benefits

Insurance benefits including life assurance

Regular events and discounts at gyms and popular retailers

Wellbeing and mental health support

Vibrant office location in Holborn with numerous amenities nearby

To apply for the Lead Full-stack Developer position, please submit your CV and cover letter detailing your relevant experience and why you are interested in this role.

Senior C++ Software Engineer Linux

Senior C++ Software Engineer / Developer (Linux SQL C+) London / WFH to £110k

Global-leading FinTech is seeking a Senior C++ Software Engineer to take ownership of strategic enhancements on their core platform, as well as directly on bespoke client projects.

The organisation is a pioneer in the field of cross-asset securities and derivatives post-trade processing technology, and have created ground-breaking, adaptable software that produces secure and scalable solutions for peak operational efficiency and optimum business performance for their clients.

This is an exciting opportunity to accelerate your career alongside established business and technology leaders, and gain / deepen your finance experience. As a C++ Software Engineer, you’ll be responsible for designing and building unique technical solutions, meeting user requirements and contributing to the evolution of the cutting-edge platform.

Not only can you take advantage of working in a modern, technology-driven environment, but you will be granted a great deal of autonomy across the full development lifecycle, influencing key technical decisions and working with a highly collaborative, experienced team.

Location / WFH:

You’ll join colleagues in the London office three days a week with flexibility to work from home the other two days.

About you:

You have strong C++ development experience on Linux or UNIX, C+ and above

You have good SQL skills

You’re a passionate technologist who is motivated by working on cutting-edge systems and engineering complex solutions

You’re a positive, proactive team member who excels when working collaboratively

You have a strong knowledge of software engineering best practices

You’re degree educated, having achieved a 2.1 or above in a STEM discipline

Ideally you will have experience working in a financial services or trading environment although technical skills of far greater importance

What’s in it for you:

As a Senior C++ Software Engineer / Developer you will receive a competitive package:

Salary to £110k

Pension (to 9% contribution)

Healthcare

Volunteer / charity days

Hybrid working

Career development and training

Apply now to find out more about this Senior C++ Software Engineer / Developer (Linux SQL C+) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We’re an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

Mid-Level Full Stack Engineer

Bionic is a leading tech-enabled business switching service. We empower small business owners with a radically easier way for them to sort their business essentials through our smart technology.

We’ve evolved into a digital business, investing heavily in talent and a cutting-edge tech platform, developing unique customer journeys, in addition to expanding our range of products.

By combining smart technology with world class human service, we help match a growing number of small business customers with the right energy, insurance, connectivity and finance providers and products - with speed, convenience, clarity and trust.

To support our continued growth and exciting plans, we’re looking for a Mid-Level Full-Stack Software Engineer to join our Tech Team and drive the delivery of high-quality engineering solutions.

The Role

We’re looking for an ambitious Mid-Level Full-Stack Software Engineer with proven engineering experience. As a member of our engineering team, you will be responsible for the high-quality delivery of Bionics technical best practices.

You’ll be immersed in an agile environment, reporting to the Tech Lead and working closely with the Product team to build, scale, and optimise our platform and improve the customer experience.

Location: London hybrid (1 day in office per week)

About You

As the Mid-Level Full-Stack Software Engineer your key responsibilities will be:

You’re passionate about software development.

You’re able to communicate written and verbally in a structured manner using data to support what you are saying.

You mentor more junior engineers in the team, pairing with them, reviewing their work and documentation, suggesting improvements and best practices.

You support the growth of people outside the team with knowledge sharing - creating and maintaining documentation.

You’re a natural team player.

You have a strong sense of ownership.

You’re keen to understand customer pain points.

Required skills & experience:

Experience with Node.js.

Strong knowledge of JavaScript and TypeScript.

Microservices, Event Driven Architecture.

Experience with Vue.js/Nuxt.js (preferential) or similar frontend frameworks and libraries.

API development experience.

Proficient experience with the AWS cloud platform.

Excellent written and verbal communication skills.

Strong problem-solving skills and attention to detail.

Good organisational skills.

The interview process

Initial conversation with our Talent Acquisition Team

1st stage interview with the Hiring Manager

2nd stage Pair Programming Exercise

Final stage Interview

About Bionic Group

Bionic has 600 people working across three office locations and four businesses; Bionic - London, Bionic Outbound - Luton, Think Business Loans - Chelmsford, and Smart - Field based agents.

We have a high energy work environment wherever the location; you can feel the passion the moment you walk through our door! Our work environments are packed with amazing people and energy, hubs of collaboration, creativity and fun! We’re one team, we get stuck in, we roll our sleeves up and we care about helping each other out wherever we can. We set the highest standards and show up every day to be the best version of ourselves.

Working at Bionic means provides you many opportunities to advance your career, with incredible progression, recognition, and reward.

Benefits

We know that our employees are what sets us aside from our competitors, our benefits are just part of the way we say thanks.

Enhance your health & wellbeing

Private healthcare cover

Employee Assistance Programme, including a virtual GP service, priority physio & talking therapies

Eyecare scheme

Taking time away from work

25 days annual leave plus the 8 UK bank holidays, increasing with tenure

1 paid family/religious day of leave per year - following successful probation period

1 paid charity volunteering day per year

Option to buy/sell up to an additional 3 days leave per year

Family matters: for the special moments

Enhanced maternity, paternity or shared parental leave

2 days off for your wedding upon joining, and up to 5 days after 2 years’ service

Flexible working options & a hybrid work approach

Financial wellbeing

Auto-enrolled salary sacrifice pension scheme

Life assurance

Season ticket Loans, salary advances & loans to buy/rent a home - based on tenure

Cycle to work scheme

Recognition

Highflyers incentive, a VIP experience for our high performers across Bionic group to celebrate success

Company summer & Christmas party celebrations, business and local zonely & annual awards and recognition

Long service awards

Lead Full-Stack Developer

Lead Full-stack Developer

Location: Holborn, Central London (Hybrid)

Job Type: Full-time

Direct Reports: x5 Senior Developers

Reporting to: Head of AI & Technology

Day-to-day of the role:

Lead and mentor a team of 5 Senior Developers, maintaining a hands-on approach with coding and problem-solving.

Oversee the end-to-end delivery of features, ensuring the software is scalable, speedy, and of high quality.

Architect, develop, and maintain core components of our SaaS platform:

Backend: Python, PostgreSQL

Frontend: TypeScript, NextJS/NodeJS

Integrate AI tools, APIs, and data pipelines to enhance platform intelligence.

Promote engineering best practices such as testing, CI/CD, and secure coding standards.

Conduct code reviews and provide technical mentorship.

Collaborate with the Head of AI and Technology to align development priorities with business objectives.

Foster a culture of collaboration, continuous learning, and high performance.

Troubleshoot and resolve complex issues, ensuring platform reliability and uptime.

Required Skills & Qualifications:

10+ years of commercial software development experience, with at least 5 years in a lead developer role.

Proven track record in leading small, high-performing engineering teams in fast-paced environments.

Deep expertise in full-stack development, including:

TypeScript / JavaScript (NextJS, NodeJS, Tailwind)

Python (Django, Flask, or FastAPI)

PostgreSQL

Experience with building and scaling SaaS platforms in production.

Strong background in software architecture, microservices, and API design.

Hands-on experience with cloud platforms (AWS, Azure, or GCP).

Excellent communication skills, capable of motivating and aligning technical teams.

Desirable: Experience with AI tools, APIs, ML pipelines, containerisation (Docker/Kubernetes), event-driven architecture (Kafka/RabbitMQ).

Benefits:

Hybrid working model (minimum 3 days a week in office)

25 days annual leave plus bank holidays

Flexible holiday scheme

Contributory pension scheme

Enhanced family leave benefits

Insurance benefits including life assurance

Regular events and discounts at gyms and popular retailers

Wellbeing and mental health support

Vibrant office location in Holborn with numerous amenities nearby

To apply for the Lead Full-stack Developer position, please submit your CV and cover letter detailing your relevant experience and why you are interested in this role.

Contract Palantir Foundry Engineer - DV Cleared

CONTRACT PALANTIR DATA ENGINEER - DV CLEARED

NEW OUTSIDE IR35 CONTRACT OPPORTUNITY AVAILABLE WITHIN A HIGHLY SECURE DELIVERY PROGRAMME FOR A DV CLEARED PALANTIR FOUNDRY DATA ENGINEER.

Contract opportunity for a Palantir Data Engineer to support cutting-edge National Security projects

Up to £650 per day (Outside IR35) DV clearance is essential

Based full-time onsite in London

Initial 12-month contract, with strong potential for long-term extension

To apply, please email:

WHO WE ARE?

We are growing our customer delivery team off the back of major success in the secure consultancy space. As part of a key programme of work, we are looking to build an additional Palantir Data Engineering team to help deliver mission-impacting solutions within a fast-paced, secure environment.

WE NEED THE PALANTIR DATA ENGINEER TO HAVE

Proven experience building and deploying applications using Palantir Foundry

Strong software/data engineering background - Computer Science, Physics, Maths, Data Science.

Proficiency in Python and JavaScript/TypeScript

Experience solving technical problems involving cloud, infrastructure, data pipelines, or full-stack apps

Ability to design and manage Ontologies and build applications using Foundry tools like Workshop

Strong communication skills to collaborate with technical and military/non-technical stakeholders

Experience integrating data from multiple sources into Foundry via Pipeline Builder and custom code

Comfortable working on-site within a secure environment and at pace with end-users

TO BE CONSIDERED . Please either apply by clicking online or emailing me directly to For further information, call me on . I’m happy to speak outside of normal working hours (7am-10pm). If unavailable, leave a message and I’ll get back to you ASAP.

By applying for this role you give express consent for us to process and submit your application to our client in conjunction with this vacancy only.

KEY SKILLS: PALANTIR / FOUNDARY / DATA ENGINEER / PIPELINE BUILDER / ONTOLOGY / PYTHON / TYPESCRIPT / FULL STACK / DV CLEARED / LONDON / CONTRACT

Senior Software Engineer - eDV Cleared

SENIOR SOFTWARE ENGINEER - eDV CLEARED

NEW PERMANENT JOB OPPORTUNITY AVAILABLE WITHIN A GLOBALLY LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE

Permanent job opportunity for a Senior Software Engineer

Globally leading defence / cyber security company

Salary up to £100,000 plus clearance bonus

London based organisation in an easily accessible location

Permanent Software Engineer

To apply please call / or email

WHO WE ARE?

We are recruiting Senior and Lead Software Engineers to work with a multi-national, industry leading National Security client in central London. Due to the nature of the work you must hold enhanced DV Security Clearance.

WHAT WILL THE SENIOR SOFTWARE ENGINEER BE DOING?

As a Senior Software Engineer, you will work with an experienced agile team to design and deliver packages of bespoke work, work development teams and liaise with customers. You will work through the entire software development life cycle from requirements capture to R&D, implementation to automation.

WE NEED THE SENIOR SOFTWARE ENGINEER TO HAVE .

Current enhanced DV clearance

Experience with at least one or more of the following: Java, Python, C++, .NET, C#, JavaScript, React

Experience mentoring juniors or leading a team

Experience / Knowledge of automation

IT WOULD BE NICE FOR THE SENIOR SOFTWARE ENGINEER TO HAVE .

Cloud based experience

Microservice architecture or server-less architecture

Big Data / Messaging technologies such as Apache Nifi / MiNiFi / Kafka

TO BE CONSIDERED .

Please either apply by clicking online or emailing me directly to For further information please call me on . I can make myself available outside of normal working hours to suit from 7am until 10pm. If unavailable please leave a message and either myself or one of my colleagues will respond. By applying for this role you give express consent for us to process & submit (subject to required skills) your application to our client in conjunction with this vacancy only. Also feel free to connect with me on LinkedIn, just search Dominic Barbet. I look forward to hearing from you.

SENIOR SOFTWARE ENGINEER - DV CLEARED

KEY SKILLS:

SENIOR SOFTWARE ENGINEER / SENIOR SOFTWARE DEVELOPER LEAD SOFTWARE ENGINEER / JAVA DEVELOPER / JAVA ENGINEER / LEAD SOFTWARE DEVELOPER / SENIOR SOFTWARE DEVELOPER / DV CLEARED / DV CLEARANCE / DEVELOPPED VETTING / DEVELOPED VETTED / DEEP VETTING / DEEP VETTED / SC CLEARED / SC CLEARANCE / SECURITY CLEARED / SECURITY CLEARANCE

Senior C# .NET Developer

Morris Sinclair Recruitment

Senior C# .NET Developer - WealthTech - Remote or Hybrid

The Opportunity

We’re delighted to be working with our prestigious WealthTech client who are seeking an exceptional Senior C# .NET Developer to work on their proprietary software within their well established team. Our client delivers cutting-edge software solutions for some of the UK’s largest financial services companies and has established themselves as a key player in the FinTech space.

This is a fantastic opportunity for an experienced Senior C# .NET Developer with good object-oriented analysis and design skills, familiarity with design patterns and practices to work for an award winning company.

The role offers excellent career progression within a fast-growing FinTech environment.

What We Need

The ideal candidate will have experience working in an Agile environment (such as Scrum) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies, staying ahead of industry trends, and be committed to continuous skill development. A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team.

Experience

Good knowledge of Microsoft development technologies

Visual Studio 2022 onwards

Strong C# / .NET experience

Net / .Net Core Web API development experience

API documentation generation tools

Experience using IoC containers

SQL Server experience

Experience using Entity Framework

OOAD skills and good understanding of Design Patterns and Practices

Web services (SOAP and /or WCF)

Unit testing / Test Driven Development

Distributed WinForms systems development

Desirable

Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment.

Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices.

Proficient in SQL Server query optimisation, including performance tuning and the implementation of efficient indexing strategies.

What You Will Be Doing

Designing and implementing Web APIs to support a well-established Pensions Administration platform

Conducting thorough code reviews to ensure high-quality, maintainable, and error-free code.

Providing technical support and troubleshooting assistance to both internal teams and external clients.

Managing and providing ongoing support for both internal and hosted system environments.

Developing and enhancing WCF services, as well as updating and refining WinForms user interfaces.

Overseeing the preparation of software releases, ensuring proper versioning, documentation, and deployment readiness.

Drop us a message if you are interested or apply now with your CV.

ALL CANDIDATES MUST BE UK BASED AND BE ELIGIBLE TO WORK WITHOUT THE NEED FOR SPONSORSHIP

Location: Hybrid - Southampton, UK (minimum 3 days on-site)

Salary: £32,248 - £34,278 per annum

Contract: Full-time, Permanent

Closing Date: Applications reviewed on a rolling basis

Interview Date: 4 November 2025

Overview

Our client, a leading membership-based organisation, is seeking a PHP Developer to join their expanding digital team. This is an excellent opportunity for a skilled developer with a passion for innovation and problem-solving to work on a large-scale in-house platform.

As the in-house specialist for back-end systems, you will play a key role in improving, maintaining, and innovating digital services that support a broad user base. The role will involve collaboration with internal stakeholders, hands-on development, and end-to-end responsibility across the software lifecycle.

Responsibilities

Build, maintain, and enhance back-end PHP-based systems.

Write clean, efficient, and maintainable code.

Contribute to the planning and delivery of digital projects.

Lead on all phases of the development lifecycle.

Work with stakeholders to gather requirements and improve user experience.

Integrate and align multiple digital systems to ensure consistency and functionality.

Requirements

Essential Skills & Experience:

Minimum of 2 years’ experience in PHP development (including outside frameworks).

Strong understanding of the MVC programming approach.

Experience with MySQL for data management.

Solid knowledge of HTML, CSS, JavaScript, jQuery, and Bootstrap.

Experience with Vue.js or similar frontend frameworks.

Proven experience developing and maintaining WordPress, including custom plugins.

Beneficial Skills & Knowledge:

Linux usage and administration.

Advanced MySQL and SQL administration.

Benefits

35-hour working week.

Hybrid working model - minimum of 3 days on campus.

46 days annual leave (30 days standard leave + closure days + bank holidays).

Option to purchase additional leave.

Defined contribution pension scheme with 10% employer contribution.

Discounted bus passes and cycle scheme.

A collaborative, dynamic, and supportive team environment.

Access to wellbeing and social activities throughout the year.

Application Process

To apply, please submit your CV and a covering letter outlining your PHP experience (including whether it is current or past experience). Applications without this detail will not be considered.

Candidates may be asked to complete a PHP skills task before shortlisting. Shortlisted applicants will be invited to in-person interviews on 4 November 2025, which will include a further technical assessment.

Please note: Visa sponsorship is not available for this role. Applicants must have the right to work in the UK.

Fullstack .NET/Angular Developer - Inside IR35 - Insurance

Full stack Angular / .Net Developer - Insurance

6 month initial contract

650 Inside IR35

Hybrid: x 1 per week on site, Central London

We are currently recruiting for a full-stack Angular / .Net Developer to join the Risk Technology team within a global insurance company.

You will be working on a risk model, building in Angular and .Net with a heavy focus on the front end. The work will be split 50/50 between Angular V18 and .Net.

Experience / Skills:

Angular - version 18+ (RxJs, performance optimisation, design patterns)

.Net V8 / C#

Azure DevOps

Azure experience (Functions, DevOps, Databricks, Data Factory)

Industry experience within financial services

Highly Desirable experience with AI/ML, such as Search Index, Azure Machine Learning

Desirable experience in Python for data manipulation, analysis, and ML (Langchain)

If this role is of interest to you or you would like to learn more, please apply now!

Carbon60, Lorien & SRG - The Impellam Group STEM Portfolio are acting as an Employment Business in relation to this vacancy.

Full Stack Java Developer

Location: Leeds (Hybrid working available)

Salary: 65,000 - 80,000 per annum + Benefits

About the Role:

We’re looking for a talented and driven Full Stack Java Developer to join our growing team in Leeds. This is a fantastic opportunity for someone who is passionate about technology, enjoys problem-solving, and wants to work on high-impact projects using modern tools and frameworks.

Key Responsibilities:

Design, develop, and maintain scalable full-stack applications using Java (backend) and modern front-end technologies (React, Angular, or similar).

Collaborate with product owners, designers, and other developers to deliver high-quality software solutions.

Write clean, maintainable, and testable code following best practices.

Participate in code reviews, sprint planning, and agile ceremonies.

Troubleshoot and resolve technical issues across the stack.

Skills & Experience Required:

Strong experience with Java, Spring Boot, and RESTful APIs.

Proficiency in front-end frameworks such as React, Angular, or Vue.js.

Good understanding of databases (SQL and NoSQL).

Familiarity with CI/CD pipelines, cloud platforms (AWS/Azure), and containerisation (Docker, Kubernetes) is highly desirable.

Strong problem-solving and communication skills.

Experience working in Agile/Scrum teams.

Contract Palantir Foundry Engineer - DV Cleared

CONTRACT PALANTIR DATA ENGINEER - DV CLEARED

NEW OUTSIDE IR35 CONTRACT OPPORTUNITY AVAILABLE WITHIN A HIGHLY SECURE DELIVERY PROGRAMME FOR A DV CLEARED PALANTIR FOUNDRY DATA ENGINEER.

Contract opportunity for a Palantir Data Engineer to support cutting-edge National Security projects

Up to £650 per day (Outside IR35) DV clearance is essential

Based Full time onsite in London

Initial 12-month contract, with strong potential for long-term extension

To apply, please email: (see below)

WHO WE ARE?

WE NEED THE PALANTIR DATA ENGINEER TO HAVE

Proven experience building and deploying applications using Palantir Foundry

Strong software/data engineering background - Computer Science, Physics, Maths, Data Science.

Proficiency in Python and JavaScript/TypeScript

Experience solving technical problems involving cloud, infrastructure, data pipelines, or full-stack apps

Ability to design and manage Ontologies and build applications using Foundry tools like Workshop

Strong communication skills to collaborate with technical and military/non-technical stakeholders

Experience integrating data from multiple sources into Foundry via Pipeline Builder and custom code

Comfortable working on-site within a secure environment and at pace with end-users

TO BE CONSIDERED . Please either apply by clicking online or emailing me directly to (see below) For further information, call me. I’m happy to speak outside of normal working hours (7am-10pm). If unavailable, leave a message and I’ll get back to you ASAP.

By applying for this role you give express consent for us to process and submit your application to our client in conjunction with this vacancy only.

KEY SKILLS: PALANTIR/FOUNDARY/DATA ENGINEER/PIPELINE BUILDER/ONTOLOGY/PYTHON/TYPESCRIPT/FULL STACK/DV CLEARED/LONDON/CONTRACT

Next.JS Full Stack Developer

My leading Technology client are looking for a talented and motivated Full Stack Developer (Next.JS, Node.JS) to work on a strategically important project to increase their foothold in their European markets. You’ll work on a greenfield project on a long-term contract basis.

The following skills/experience is essential:

Strong Next.JS and Node.JS

Excellent Full Stack Developer

Understanding of modern Front End build pipelines and tools

Ability to translate designs and wireframes into high quality code

Good communication skills

Rate: Up to £425/day

Duration: 6 months +

Location: London (good work from home options available)

If you are interested in this Next.JS Node.JS Full Stack Developer position and meet the above requirements please apply immediately.

Senior/Lead Full Stack Developer React / Python AI Start up!

Senior/Lead Hands on Full Stack Developer - React / Python

London Hybrid (3days in the office and 2 days from home)

£110,000+ Equity Full-Time Start-up

We’re a high-growth start-up building a leading healthcare!

Looking for a Full Stack developer who loves working across the stack - React on the front end, Python on the back end.

You’ll:

Build responsive UIs in React

Develop APIs & services in Python (either Django/Flask/FastAPI)

Own features end-to-end

Help shape our tech stack

You have:

Strong React & Python skills

API & database experience

A proactive, problem-solving mindset

Ideally start-up or scale-up experience

Why us?

Big impact from day one

Technical ownership & flexibility

Career growth + equity options

Apply with your CV + GitHub

Robert Half Ltd acts as an employment business for temporary positions and an employment agency for permanent positions. Robert Half is committed to diversity, equity and inclusion. Suitable candidates with equivalent qualifications and more or less experience can apply. Rates of pay and salary ranges are dependent upon your experience, qualifications and training. If you wish to apply, please read our Privacy Notice describing how we may process, disclose and store your personal data: gb/en/privacy-notice.

Senior Software Developer

Senior Software Developer - C# .Net/Angular/AWS/NoSQL - Hybrid - Nottingham - £70,000

The Role

An innovative company within the construction sector are looking to an experienced Software Developer to join their talented development team.

You will be working on a range of cloud based products, utilising the latest technologies on a diverse set of products. These products are used globally, integrate with various other platforms across Europe, America and more.

There will be a lot of autonomy to leave your technical mark on their systems, as well as exploring modern technologies to continually transform and improve their market leading software. As well at the current MS Stack, you will get exposed and have the opportunity to learn other tools such as Automation Testing and 3D Development.

Role Requirements

Minimum 5 years’ experience in C# .NET

JavaScript/TypeScript

Angular (or React/Vue etc)

NoSQL (DynamoDB/MongoDB etc)

Desirables:

Serverless AWS (or Azure)

Unit Testing experience

The Company

This company are the largest player within their niche sector and continue to push forward. They have received large investment into their tech team which continues to reap the rewards. Constantly staying ahead of the curve and enabling their Developers to thrive.

They have a real focus on making user friendly design, pulling data and research from their countless years of experience within the industry that then can get then get translated into efficient pieces of software. Each department contributes heavily to this, supporting the success of the company.

The salary for this role is up to £70,000 DOE. This is a hybrid position with 2 days on site, 3 days WFH. There are also other benefits including flexible working hours, 25 days holiday, private healthcare, 5% company pension, Pluralsight access, dedicated learning time and much more.

Apply Now

If you are an experienced Software Developer looking to join a company where personal progression and development is valued, then this is the role for you.

They are interviewing suitable candidates as soon as possible so apply now and don’t miss out.

Senior Software Developer - C# .Net/Angular/AWS/NoSQL - Hybrid - Nottingham - £70,000

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.

To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.

Staff Software Engineer Java - Tech for Good

Staff Software Engineer / Developer (Java Kotlin AWS React) Hybrid WFH to £110k

Would you like to progress your career in an impactful hands-on Software Engineer role working on Tech for Good?

You could be joining a HealthTech Start-up, founded by two highly successful, Cambridge University educated management consultants, that is aiming to improve patient and social care for all by using complex technology to improve access to patient records, enabling collaboration between healthcare providers and improving nursing and medical care.

As a Staff Software Engineer you will collaborate with the CTO on the overall design and architecture of the products’ tech stack, working on Greenfield applications. The tech stack is based on Kotlin, SpringBoot and AWS backend with TypeScript, React and Next.js on the front end.

You’ll be hands-on with architecture, design and coding, including complex business logic, authentication and security aspects, working across the full tech stack to create the beta product.

Location / WFH:

You can work from home most of the time, the company has office space in London you’ll join them there once every three weeks, and also occasionally visit clients in the South West to gather requirements and liaise on bespoke product development.

About you:

You have expertise with software engineering best practices, experience across the full development lifecycle and tech stack

You have experience with Kotlin, Java, SpringBoot and AWS

You have a good understanding of APIs and permission based systems

You have a good understanding of software architecture and have experience of building systems from scratch

You’re able to assess, recommend and make technical decisions with long-term product strategy in mind

You have strong technical project leadership skills and experience of working with clients

You have excellent communication and stakeholder management skills

You are degree educated in Computer Science or similar technical discipline

Experience with RBAC systems would be beneficial

What’s in it for you:

Salary to £120k

Equity shares package

Impactful role with excellent progression opportunities

Opportunity to work on tech for good to positively benefits society

Apply now to find out more about this Staff Software Engineer / Developer (Kotlin AWS React) opportunity.

Senior Software Engineer TypeScript Full Stack

Senior Software Engineer (TypeScript Full Stack) London / WFH to £100k

Do you enjoy problem solving and working with a range of technologies including functional programming languages such as Elixir, using the right tool for the job?

You could be progressing your career in a senior, hands-on Software Engineer role at a successful and profitable energy trading market data scale-up.

What’s in it for you:

Competitive salary, to £100k + Significant Equity

Hybrid working (3 days London office per week)

Vitality Healthcare

Continuous career development and learning opportunities

Influential role as part of a small, close knit team

Complex and interesting work

Your role:

As a Senior Software Engineer you will take ownership, working on technically challenging Greenfield development projects. You’ll be working on complex problems with scalability and reliability in mind, across the full development lifecycle from architecture and design through to implementation.

There’s a range of technology in the stack, you’ll have a 50/50 split between backend and frontend development using TypeScript, Elixir, Elm and AWS amongst others, learning and picking new things up on the job in a collaborative, tech driven environment where you can get stuff done and see the results of your work.

Location / WFH:

You’ll join the team in London three days a week in a hybrid work from home model.

About you:

You are degree educated in Computer Science or similar STEM discipline, having achieved a 2.1 or above from a Russel Group / Oxbridge or top 100 global university

You are an experienced software engineer with a strong knowledge of best practices and Computer Science fundamentals and experience of delivering complex, data centric software

You have advanced analytical and problem solving skills

You’re comfortable taking ownership of projects and mentoring more junior team members

You have strong TypeScript skills, combined with any backend programming language (e.g. Python, Java, C++, C#)

You’re happy to work with the following tech stack (you don’t need experience with all): Elixir, Ember, Elm, Phoenix, LiveView, Python, PostgreSQL, AWS, Docker

You have an analytical mindset and enjoy problem solving

You have experience of working in start-ups / SMEs and have good business acumen

Ideally you will have a good understanding of financial markets

Apply now to find out more about this Senior Software Engineer (TypeScript Full Stack Elixir) opportunity.

****Back End Developer (Laravel / Vue.js / AWS)****Fully Remote (UK-based only) Up to £70,000 DOE

We’re working with an innovative software house who are looking for a talented Back End Developer to join their growing team. This is a fantastic opportunity to work on a modern, greenfield platform built with the latest technologies, alongside a supportive and ambitious development team.

Most importantly, this is your chance to make a real impact in a global industry worth over £68 billion.

The Role

As a Back End Developer, you’ll play a key role in designing and building new features for a cutting-edge event management platform. You’ll work closely with front-end, back-end, and mobile engineers to deliver clean, scalable code, and will have the chance to take ownership across the full development cycle.

This is a remote-first role (with the option to occasionally meet the team if desired) and comes with clear career progression, regular support from an experienced Technical Director, and a collaborative engineering culture.

What You’ll Be Doing

Building reusable, scalable, and clean PHP code using Laravel (following TDD and OOP best practices).

Designing and extending APIs and core platform functionality.

Troubleshooting, testing, and maintaining databases and back-end services for performance and optimisation.

Integrating third-party APIs, including leading payment processors and payment gateways.

Working with AWS cloud services to support deployment and scalability.

Collaborating daily with a talented remote team via stand-ups, code reviews, and monthly release cycles.

Essential Skills & Experience

Strong commercial experience with PHP and Laravel.

Solid understanding of Vue.js and modern JavaScript frameworks.

Experience working with MySQL databases.

Hands-on experience with AWS (EC2, S3, etc.).

Proven knowledge of payment integrations and payment gateways.

UK-based (applications from outside the UK cannot be considered).

What’s On Offer

Salary up to £70,000 DOE.

Fully remote working (UK only).

The chance to impact a £68bn global industry.

Work with the latest technologies in a modern, forward-thinking environment.

A clear career progression plan and mentoring to help you reach your goals.

Collaborative, friendly, and supportive engineering team.

Apply Now

If you’re an ambitious PHP Back End Developer looking for a role that offers technical challenges, growth opportunities, and the flexibility of remote working, we’d love to hear from you.

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.

To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.

Full Stack Engineer C# .Net Core React SaaS

Full Stack Engineer / Developer (.Net Core JavaScript React) Leatherhead to £70k

Do you enjoy working with a range of tech across the full stack?

You could be joining one of Britain’s largest and longest standing Microsoft partners and technology consultancies, working on a range of projects and progressing your career.

As a Full Stack Engineer you’ll join a small team, designing and developing a range of applications with a focus on backend development (70/30), for eCommerce clients. You’ll be using a range of modern technologies including C# .Net Core, JavaScript / TypeScript and React within a DevOps, Azure, SaaS environment. There currently breaking up monolith applications into microservices.

You’ll be working collaboratively, problem solving and promoting best practice within a friendly and supportive Agile development environment, you’ll be able to lead stand-ups, discuss ideas, reason about trade-offs and ensure deadlines are met.

Location / WFH:

There’s a hybrid work from home policy with two days a week in the Leatherhead office (just off M25 or about 10 minute walk from the station) you can enjoy a range of perks such as onsite gym and playroom.

About you:

You have strong C# .Net Core backend development skills

You also have some experience with JavaScript / TypeScript, React, HTML and CSS for front end work

You have experience with Kubernetes and / or Docker

You’re familiar with Azure cloud based services, microservices, DevOps environments

You’re collaborative and pragmatic with great communication skills

What’s in it for you:

As a Full Stack Engineer / Developer you will earn a competitive package:

Salary to £70k + Bonus

Pension, Life Assurance, Vitality Healthcare

25 days holiday + Christmas closure

Long service awards

Share scheme

Social clubs and volunteering days

Onsite gym, playroom and bar

Employee Assistance Programme

Mental Health initiatives

Enhanced maternity, paternity, adoption and family leave

Annual family events

Apply now to find out more about this Full Stack Engineer / Developer (.Net Core JavaScript React Azure) opportunity.

Senior C# .NET Developer

MORRIS SINCLAIR RECRUITMENT LTD

C#/.Net for FinTech software

Hybrid / Remote - Portsmouth Office

Award Winning Business

Senior C# .NET Developer - WealthTech - Remote or Hybrid The Opportunity We’re delighted to be working with our prestigious WealthTech client who are seeking an exceptional Senior C# .NET Developer to work on their proprietary software within their well established team. Our client delivers cutting-edge software solutions for some of the UK’s largest financial services companies and has established themselves as a key player in the FinTech space. This is a fantastic opportunity for an experienced Senior C# .NET Developer with good object-oriented analysis and design skills, familiarity with design patterns and practices to work for an award winning company The role offers excellent career progression within a fast-growing FinTech environment.What We Need The ideal candidate will have experience working in an Agile environment (such as Scrum) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies, staying ahead of industry trends, and be committed to continuous skill development. A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience

Good knowledge of Microsoft development technologies

Visual Studio 2022 onwards

Strong C# / .NET experience

Net / .Net Core Web API development experience

API documentation generation tools

Experience using IoC containers

SQL Server experience

Experience using Entity Framework

OOAD skills and good understanding of Design Patterns and Practices

Web services (SOAP and /or WCF)

Unit testing / Test Driven Development

Distributed WinForms systems development

Desirable

Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices.

Proficient in SQL Server query optimisation, including performance tuning and the implementation of efficient indexing strategies.

What You Will Be Doing

Designing and implementing Web APIs to support a well-established Pensions Administration platform

Conducting thorough code reviews to ensure high-quality, maintainable, and error-free code.

Providing technical support and troubleshooting assistance to both internal teams and external clients.

Managing and providing ongoing support for both internal and hosted system environments.

Developing and enhancing WCF services, as well as updating and refining WinForms user interfaces.

Overseeing the preparation of software releases, ensuring proper versioning, documentation, and deployment readiness.

Drop us a message if you are interested or apply now with your CV. ALL CANDIDATES MUST BE UK BASED AND BE ELIGIBLE TO WORK WITHOUT THE NEED FOR SPONSORSHIP

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Frequently asked questions

What is a Full Stack Engineer?

A Full Stack Engineer is a software developer skilled in both front-end and back-end technologies, capable of building complete web applications from user interfaces to server-side logic and databases.

What skills are commonly required for Full Stack Engineer jobs?

Common skills include proficiency in front-end technologies like HTML, CSS, JavaScript (and frameworks such as React or Angular), back-end languages like Node.js, Python, or Java, database management, API development, and version control tools like Git.

How can I find suitable Full Stack Engineer jobs on Haystack?

You can use our search filters to narrow down Full Stack Engineer jobs by location, technology stack, experience level, and company preferences. Signing up for job alerts can also keep you updated on the latest opportunities.

Are there remote Full Stack Engineer job listings available?

Yes, Haystack offers numerous remote Full Stack Engineer positions. Use the remote work filter on our platform to find job openings that allow you to work from anywhere.

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Interview processes vary by company but usually include an initial technical screening, coding challenges or tests, system design interviews, and behavioral interviews to assess problem-solving skills and cultural fit.

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