Hand-curated positions in niche programming languages
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Cupertino, CA, USA
Lead and mentor Internal Tools team focused on scalable software solutions. Requires 5+ years engineering leadership. Preferred experience with Clojure and functional programming teams.
Remote (UK)
Senior Product Engineer designing scalable architectures for specialty insurance technology. Haskell with a focus on end-to-end system ownership, technical delivery, and mentoring.
Remote (UK)
Lead Product Engineer designing scalable architectures for specialty insurance technology. Haskell with a focus on technical leadership, complex initiative delivery, and team development.
Remote, USA
Build and ship a modern EHR/operating platform for senior care. Focus on Scala/Play backend and React/TypeScript frontend. Requires 7+ years experience; knowledge of the Effect ecosystem is a plus.
Salzburg, Austria
The role involves building and maintaining banking software in Cobol and Java. Involves full lifecycle work, quality assurance, and customer support collaboration.
Collingwood, Australia
Haskell Developer role building and evolving a bespoke e-commerce platform. Strong FP skills required; Nix, AWS, and Ruby on Rails experience a plus.
Bucarest, Romania
Join a team delivering first-class banking applications in all phases of the SDLC. Requires relevant experience in COBOL programming, Mainframe, JCL, DB2, and a medium level of French to collaborate with colleagues in France.
Jersey City, NJ, USA | Las Vegas, NV, USA
Build and maintain robust backend systems for real-time customer engagement and retention platforms). Requires 3+ years backend development, 2+ years professional Scala, strong functional programming, and experience with real-time systems and Kafka/microservices.
Caen, France
Expert Compiler Engineer developing the Catala programming language for social benefits calculation. OCaml with functional programming, compiler tooling, runtime systems, LSP, and build tools, focusing on open-source contributions and language design.
New York, NY, USA | Seattle, WA, USA | San Francisco, CA, USA
Formal methods engineer role building automated verification tools for smart contracts. Requires experience with model checking, SAT/SMT solving, and programming language theory.
London, England, UK | Lisbon, Portugal
Senior Engineer/Architect role to build the next generation of the high-performance communication layer that connects all services on Cloudflare's massive edge network. Requires deep expertise in Rust, experience with performance engineering for high-throughput, low-latency distributed systems, and the ability to serve as a key technical leader driving operational excellence.
Kolkata
Design and develop comprehensive architectural solutions using the Raincode Platform for mainframe modernization projects. Requires 12-16 years experience and deep expertise in Raincode Platform, CICS, VSAM, JCL, DB2, and COBOL.
Remote
Senior Software Engineer building blockchain protocols and infrastructure, working primarily in Rust. Requires 5+ years software engineering experience with large-scale systems and network programming.
London, UK
Senior Software Engineer building data-driven products for the concrete industry. Haskell with TypeScript and Python, focusing on domain modelling, technical design, and leading initiatives.
London, England, UK
Senior role using Haskell, TypeScript, and Python across frontend/backend. Focus on new product development, domain modelling, and concrete data systems. Involves mentoring, tech leadership, and customer-facing work.
Courbevoie, France
Senior Developer building debt collection and dispute management applications for factoring operations. Requires experience with IBM Z/OS, COBOL, and DB2.
Strasbourg, France
Full-cycle analysis and development role for the "Cardlink" Monetics Sector supporting foreign banks. Requires a Bac+4/5 degree and proficiency in both COBOL and C#.
Nantes, France
Develop and maintain mainframe applications covering the Basel regulatory functional scope for Credit Risk. Requires a Bac+4/5 degree and proficiency in COBOL/DB2.
Zürich, Switzerland
Principal ML engineer role leading certified AI avionics development. Focus on visual traffic detection, deep learning, and CV using Rust, Python, and C++. Strong research and system design responsibilities.
Pune, India
Senior Engineer building trader and counterparty surveillance systems using Scala, Java, Python, and Big Data technologies (Spark, Impala, Hive, Hadoop). Requires core expertise in Scala and Java, Python exposure, and experience with large datasets.
Düsseldorf, Germany
Apprenticeship focused on developing securities processing systems. Training starts with COBOL and DB2 on mainframe, later transitioning to Java, Spring Boot, Angular, and Kafka. No experience required. German required; English preferred. Starts August 2026
Frankfurt am Main, Germany | Düsseldorf, Germany
COBOL Developer maintaining and modernizing securities processing platform applications. Requires strong COBOL and DB2 experience with mainframe application development. German (C1) and English (B2) required.
Frankfurt am Main, Germany | Düsseldorf, Germany
COBOL Developer building settlement and depot transfer systems, migrating mainframe applications to microservices architecture. Requires strong COBOL and DB2 experience with mainframe development. German (C1) and English (B2) required.
Budapest, Hungary | London, England, UK | Zurich, Switzerland | New York, NY, USA | NJ, USA | CT, USA
Senior Software Engineer contributing to Canton Network's distributed ledger platform Scala codebase. Requires polyglot engineering experience with production systems. Scala experience a plus but not required.
Budapest, Hungary | Zurich, Switzerland
Backend Software Engineer building APIs, libraries, and tools for Canton Network developers, primarily in Scala. Requires experienced Scala development and specialization in either database development or secure API design.
San Francisco, CA, USA
Senior Software Engineer building and operating large-scale database infrastructure for 200M+ users using ScyllaDB, PostgreSQL, Elasticsearch, Linux, and Rust. Requires 4+ years experience with distributed systems and highly-available databases, plus proficiency in statically-typed languages. Rust experience a bonus.
London, England, UK
Elixir Software Engineer building a marketing technology platform for automotive and e-Mobility sectors. Elixir with LiveView, PostgreSQL, Redis, RabbitMQ, and Kubernetes on Google Cloud, focusing on event-driven architecture, data-driven features, and XP practices including TDD and pair programming.
Amsterdam, Netherlands
Rust Engineer developing and extending the DuckDB Rust ecosystem. Rust with FFI and C++ interop, building extensions, contributing to duckdb-rs, and client consulting on database integration for production systems.
London, England, UK
Backend engineer building a unified travel API using Elixir, Phoenix, Kubernetes and GCP. Tackle complex airline integrations and API design while shaping engineering standards.
London, England, UK
Elixir product engineer role building healthcare tools with Phoenix and LiveView. Full-stack development, SQL optimization, CI/CD, and infrastructure in a small, agile team. Focus on UK primary care systems with hybrid flexibility.