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Elixir Developer proSapient. Every day, somewhere in the world, important decisions are made. Whether it is a private equity company deciding to invest millions into a business or a large corporation implementing a new strategic direction, these decisions impact employees, customers, and other stakeholders. . Consulting and private equity firms come to proSapient when they need to discover knowledge to help them make great decisions and succeed in their goals. It is our mission to support them in their discovery of knowledge. . We help our clients find industry experts who can provide their knowledge via interview or survey: we curate this knowledge in a market-leading software platform; and we help clients surface knowledge they already have through expansive knowledge management.  . We are seeking an experienced Elixir Developer to join our innovative engineering team. You will contribute to the development of robust and scalable web applications, working on our cutting-edge platform that helps clients make smarter investment and consulting decisions. This is an exciting opportunity to work in a collaborative environment on projects that have a global impact.. Key duties in this role will include: . Develop and maintain scalable, efficient, and high-quality Elixir web applications.. Design, optimize, and troubleshoot SQL queries and performance issues.. Collaborate with cross-functional teams to design and implement new features and improvements.. Write clean, maintainable, and testable code adhering to industry best practices.. Contribute to architectural decisions and optimize system performance..  . Why Join proSapient?. Be part of a rapidly growing company that is redefining primary research.. Work on meaningful projects with real-world applications and global reach.. Collaborate with a talented, driven, and diverse team.. If you are passionate about Elixir development and want to work on impactful projects in a dynamic environment, we would love to hear from you!. Requirements. Required Skills and Experience. Proven experience in building and maintaining Elixir-based web applications (e.g., knowledge of Phoenix).. Strong understanding of SQL, including profiling and building efficient queries.. Solid problem-solving skills and the ability to troubleshoot complex systems.. BS/MS in Computer Science or equivalent industry experience. Bonus Skills. Familiarity with . Absinthe. (GraphQL) and . Oban. (Job Processing).. Knowledge of DevOps practices and deployment pipelines.. Experience working in the SaaS or FinTech industry.. AI/ML/LLMs, understanding of agentic architectures, workflow optimisation, prompt engineering. Language Requirements. Proficiency in English to effectively communicate with the product team.. As a large part of the technical team is Ukrainian or Russian speaking, knowledge of Ukrainian or Russian is nice to have but is not mandatory. Benefits. Tenure gifts to thank our loyal staff who help the business to grow . An enhanced Maternity & Paternity package . 22 days annual leave each year + Statutory public holidays, inclusive of a week's closure over the Christmas period to fully reset . A paid sick leave policy (up to 10 days per year) . A hybrid working model featuring three days per week in the Lisbon office and 2 from home . Meal allowance of 9.6€ per working day. . Team socials – from Pizza to Caribbean to Korean food, we love to encourage our team to get together and try new experiences together! . The opportunity to create, lead or participate in one of our many ERG groups, to help drive diversity, inclusion and understanding across our business . Corporate Events: from bi-annual Christmas & Summer parties, we love to celebrate, collaborate and have fun together! . We are committed to building an inclusive workplace - did you know that marginalized groups are less likely to apply to jobs unless they meet every requirement listed? If you are interested in the above role, but don't necessarily tick every box, we encourage you to apply anyway - this role could still be a great match!  . At proSapient, we are an equal opportunity employer. As such, we offer equal employment opportunities without regard to race, colour, religion, sex (including pregnancy and gender identity), national origin, age, disability, genetic information, veteran status and other protected class characteristics.  . All employment is decided based on qualifications, merit, and business need. Due to the regulated nature of our clients, all successfully offered candidates are subjected to thorough screening & pre-employment checks, including an enhanced background check, which can affect the outcome of any offer of employment. . About the company.  . proSapient is the platform that allows our clients to seamlessly connect to Industry Experts around the globe whether they need a three-hour consultation or simply to ask one question. Our clients include hedge funds, private equity, and professional services firms where our experts provide insight.