1 to 25 of 34 Functional Programming Jobs in London

Software Engineer - Python/FastAPI/React/Functional programming/Typescript Location: London, UK (Hybrid) Type: Full-time Level: Mid to Senior Salary: £70,000 to £100,000 Company: VC back Startup About the Role: This startup is building a cutting-edge platform to transform how engineers design physical products. Instead of creating one solution at a … Computational Geometry. Opportunities: Frontend or Backend Tech Stack within the engineering environment: Backend: Python, FastAPI, Pydantic, PostgreSQL, Docker Frontend: React, TypeScript, Vite Infrastructure: GitHub Actions, GCP, Kubernetes (optional) Paradigms: Functional programming, async APIs, event-driven architecture Responsibilities Build and maintain backend services using FastAPI and Python for geometry, simulation, and data workflows Develop responsive, performant frontends using React … and TypeScript Work closely with domain experts (engineers, designers) to translate complex physical problems into usable software features Follow functional programming practices to write testable, composable code Own features from idea to implementation to deployment Contribute to architectural decisions in a fast-moving, early-stage product Requirements Bachelor's degree in Computer Science 2+ years of experience building More ❯

predominantly Python with some Rust. They are running on AWS. This is nectar for Engineers who have both a passion for Front End Development and an interest to learn Functional Programming. The skill set for this role could include React, Typescript, Python, Functional programming language of any kind and a major statically typed language. Any WebGL, OpenGL … years of experience in frontend development Strong hands-on expertise with React, Typescript, Javascript Strong foundation in Computer Science (BSc/MSc from a top university). Desirable: functional programming (hands on/interest) such as ELM/Haskell/Clojure Startup experience is a plus. Why Join Us? Be part of a pioneering AI startup with global More ❯

predominantly Python with some Rust. They are running on AWS. This is nectar for Engineers who have both a passion for Front End Development and an interest to learn Functional Programming. The skill set for this role could include React, Typescript, Python, Functional programming language of any kind and a major statically typed language. Any WebGL, OpenGL … years of experience in frontend development Strong hands-on expertise with React, Typescript, Javascript Strong foundation in Computer Science (BSc/MSc from a top university). Desirable: functional programming (hands on/interest) such as ELM/Haskell/Clojure Startup experience is a plus. Why Join Us? Be part of a pioneering AI startup with global More ❯

Product-Focused Backend Engineer Functional Programming & Distributed Systems London (Hybrid) | £120,000£160,000 + Equity At Ncounter, were partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs … Design to solve real user problems Playing an active role in shaping team goals, defining technical metrics, and prioritising outcomes over ticket-chasing Your Background: Hands-on experience with functional programming (Elixir is a plus, but other languages like Scala, Haskell, Clojure, Go, Node.js, or F# are welcome) Proven track record of building and scaling distributed backend systems More ❯

Product-Focused Backend Engineer – Functional Programming & Distributed Systems London (Hybrid) | £120,000–£160,000 + Equity At Ncounter, we’re partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable … Design to solve real user problems Playing an active role in shaping team goals, defining technical metrics, and prioritising outcomes over ticket-chasing Your Background: Hands-on experience with functional programming (Elixir is a plus, but other languages like Scala, Haskell, Clojure, Go, Node.js, or F# are welcome) Proven track record of building and scaling distributed backend systems More ❯

also demonstrable ability to work independently due to the remote nature of the role Ideally an undergraduate degree in a relevant STEM subject, such as Comp Sci Exposure to functional programming, pair programming and agile methodologies Product/model knowledge within Rates/FX or Equity derivatives Familiarity with financial derivatives and pricing Due to demand, we More ❯

before, at, or after the time of purchase. Responsibilities Collaborate with Product, Design and Development teams to understand product requirements and create comprehensive test plan and test cases. Execute functional and automated tests to verify the accuracy, completeness, and reliability of functionality. Contribute to the development and enhancement of UI automated testing frameworks built on Espresso (Android) and XCUITest … master's degree in science (preferably Computer Science, Engineering, or other related disciplines). Must have hands-on testing experience in iOS and Android mobile platforms by leveraging various functional and automated tools. Minimum 3+ years of mobile app Automation experience with tools like Monkey Talk, Selendriod, Appium, Katalon etc. Possesses deep knowledge on Functional, Integration, Regression, Exploratory … End to End, Compatibility, GUI, Web Services and Accessibility testing. Good Understanding of Swift, Kotlin or similar functional programming language. Strong programming abilities and debugging skills. Excellent API testing experience using Postman, Http Client, or similar tools. Strong experience with Debugging tools like Charles Proxy, Splunk, Sentry, Console or similar. Excellent communication and team player. Experience with More ❯

Unit Tests and Acceptance/behaviour Tests to ensure code quality. Tackle complex data structures and algorithms with strong problem-solving skills. Engage actively in Agile practises, including pair programming and daily stand-ups. Share your expertise and collaborate with team members while maintaining a continuous integration workflow. Work comfortably in a Linux/Unix environment. What You Bring … Professional experience in developing web-based UI solutions with React JS. Proficiency in JVM languages, especially Scala or other functional programming languages. A solid foundation in writing Unit Tests and Acceptance/behaviour Tests. Strong analytical skills and a knack for problem-solving. A proven track record in Agile methodologies and teamwork. Familiarity with the relevant problem domain More ❯

Unit Tests and Acceptance/behaviour Tests to ensure code quality. Tackle complex data structures and algorithms with strong problem-solving skills. Engage actively in Agile practises, including pair programming and daily stand-ups. Share your expertise and collaborate with team members while maintaining a continuous integration workflow. Work comfortably in a Linux/Unix environment. What You Bring … Professional experience in developing web-based UI solutions with React JS. Proficiency in JVM languages, especially Scala or other functional programming languages. A solid foundation in writing Unit Tests and Acceptance/behaviour Tests. Strong analytical skills and a knack for problem-solving. A proven track record in Agile methodologies and teamwork. Familiarity with the relevant problem domain More ❯

Unit Tests and Acceptance/behaviour Tests to ensure code quality. Tackle complex data structures and algorithms with strong problem-solving skills. Engage actively in Agile practises, including pair programming and daily stand-ups. Share your expertise and collaborate with team members while maintaining a continuous integration workflow. Work comfortably in a Linux/Unix environment. What You Bring … Professional experience in developing web-based UI solutions with React JS. Proficiency in JVM languages, especially Scala or other functional programming languages. A solid foundation in writing Unit Tests and Acceptance/behaviour Tests. Strong analytical skills and a knack for problem-solving. A proven track record in Agile methodologies and teamwork. Familiarity with the relevant problem domain More ❯

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 … 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 More ❯

they are seeking a results-oriented individual who is eager to coach and mentor team members, helping them grow both professionally and personally. Their development team uses various different programming languages with a particular focus on Golang but they are looking primarily for strong software developers first and experiences of technologies second. The company is made up of some … commercial experience in software engineering. Demonstrable experience building high-quality and scalable digital products and features. Strong project management and communication skills with the ability to collaborate across cross-functional teams. Ability to confidently make technical decisions in the best interests of users and the business. Strong knowledge and hands-on experience of designing well defined interfaces, we’re … CD pipelines, we’re using Google Cloud Build and Github Actions. Fluency in English (verbal and written). Join an exciting company with many opportunities to progress your Golang functional programming career. Send your CV for immediately review and further details. Senior Golang Backend Engineer Fully Remote/UK Working Hours More ❯

they are seeking a results-oriented individual who is eager to coach and mentor team members, helping them grow both professionally and personally. Their development team uses various different programming languages with a particular focus on Golang but they are looking primarily for strong software developers first and experiences of technologies second. The company is made up of some … commercial experience in software engineering. Demonstrable experience building high-quality and scalable digital products and features. Strong project management and communication skills with the ability to collaborate across cross-functional teams. Ability to confidently make technical decisions in the best interests of users and the business. Strong knowledge and hands-on experience of designing well defined interfaces, we’re … CD pipelines, we’re using Google Cloud Build and Github Actions. Fluency in English (verbal and written). Join an exciting company with many opportunities to progress your Golang functional programming career. Send your CV for immediately review and further details. Senior Golang Backend Engineer Fully Remote/UK Working Hours More ❯

Full Stack Engineer/Developer (TypeScript Elixir AWS) 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 Full Stack Engineer role at a successful and … 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 More ❯

Full Stack Engineer/Developer (TypeScript Elixir AWS) 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 Full Stack Engineer role at a successful and … 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 More ❯

applications using technologies such as COBOL and CICS web services to support critical business processes. Your Responsibilities Proven experience as a Mainframe Developer or similar role. Strong knowledge of programming languages, including CICS Web Services, COBOL, JCL, and SQL. Experience with IBM mainframe systems and tools. Good understanding of the software development lifecycle. Ability to work independently and in … Experience with DevOps and Agile methodologies, including CI/CD practices and Jenkins. Desirable Skills/Knowledge/Experience: Java skill set. Strong foundation in Java, including OOP and functional programming (Java 8+). Familiarity with Spring Boot annotations, configuration, and deployment simplification. RESTful API development experience. Or/and Hands-on experience using DataPower appliances. Development experience More ❯

with Python Experience or a solid understanding of finance or financial systems Fullstack development experience using JavaScript and React Experience with Flask or similar Python web frameworks Familiarity with functional programming Experience working with PostgreSQL or other SQL databases Knowledge of Docker and containerized environments Exposure to cloud platforms (ideally AWS ) Experience with financial operations systems More ❯

short-term project. Role and Responsibilities: Develop features in Typescript and Scala (running on AWS), with flexibility to use the best tool for the problem. Work in a cross-functional, collaborative team alongside engineers, product, and commercial colleagues. Contribute to both technical and product decisions. Requirements: Strong fullstack experience with Scala (functional programming) and Typescript. Comfortable working More ❯

short-term project. Role and Responsibilities: Develop features in Typescript and Scala (running on AWS), with flexibility to use the best tool for the problem. Work in a cross-functional, collaborative team alongside engineers, product, and commercial colleagues. Contribute to both technical and product decisions. Requirements: Strong fullstack experience with Scala (functional programming) and Typescript. Comfortable working More ❯

short-term project. Role and Responsibilities: Develop features in Typescript and Scala (running on AWS), with flexibility to use the best tool for the problem. Work in a cross-functional, collaborative team alongside engineers, product, and commercial colleagues. Contribute to both technical and product decisions. Requirements: Strong fullstack experience with Scala (functional programming) and Typescript. Comfortable working More ❯

short-term project. Role and Responsibilities: Develop features in Typescript and Scala (running on AWS), with flexibility to use the best tool for the problem. Work in a cross-functional, collaborative team alongside engineers, product, and commercial colleagues. Contribute to both technical and product decisions. Requirements: Strong fullstack experience with Scala (functional programming) and Typescript. Comfortable working More ❯

Key Requirements: A technical degree (BSc/MSc) in Computer Science, Software Engineering, or a related discipline. Hands-on experience developing production systems using Elixir or Erlang. Familiarity with functional programming paradigms and best practices. Exposure to frameworks like Phoenix, LiveView, or OTP—or a willingness to get up-to-speed quickly. Proven experience designing and maintaining APIs. More ❯

Key Requirements: A technical degree (BSc/MSc) in Computer Science, Software Engineering, or a related discipline. Hands-on experience developing production systems using Elixir or Erlang. Familiarity with functional programming paradigms and best practices. Exposure to frameworks like Phoenix, LiveView, or OTP—or a willingness to get up-to-speed quickly. Proven experience designing and maintaining APIs. More ❯

Key Requirements: A technical degree (BSc/MSc) in Computer Science, Software Engineering, or a related discipline. Hands-on experience developing production systems using Elixir or Erlang. Familiarity with functional programming paradigms and best practices. Exposure to frameworks like Phoenix, LiveView, or OTP—or a willingness to get up-to-speed quickly. Proven experience designing and maintaining APIs. More ❯

Key Requirements: A technical degree (BSc/MSc) in Computer Science, Software Engineering, or a related discipline. Hands-on experience developing production systems using Elixir or Erlang. Familiarity with functional programming paradigms and best practices. Exposure to frameworks like Phoenix, LiveView, or OTP—or a willingness to get up-to-speed quickly. Proven experience designing and maintaining APIs. More ❯