{"id":2484898,"url":"https://alion.io/job/lean-solutions-group-where-talent-meets-technology-senior-fullstack-developer","title":"Senior FullStack Developer","company":{"id":3775695,"name":"Lean Solutions Group - Where Talent Meets Technology","domain":"leangroup.com","url":"https://alion.io/company/leangroup-com","size_band":"201-500","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Jobvite","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Colombia"],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":78000,"max_usd":226000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":6426},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"F#","optional":false},{"name":"GCP","optional":false},{"name":"Playwright","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"Amazon S3","optional":true},{"name":"AWS Lambda","optional":true},{"name":"Claude","optional":true},{"name":"Copilot","optional":true},{"name":"Docker","optional":true},{"name":"GitHub Actions","optional":true},{"name":"JavaScript","optional":true},{"name":"Kubernetes","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-10-14T00:02:50Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-10-14T13:11:25Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Description\nCompany Overview:\nGlobal Technology Services is a rapidly expanding organization situated in Medellín, Colombia. We pride ourselves on possessing one of the most influential networks within software development and IT services for the entertainment, financial, and logistics sectors. Our corporate projections offer a multitude of opportunities for professionals to elevate their careers and experience substantial growth. Joining our team means engaging with expansive engineering teams across Latin America, Philippines and the United States, contributing to cutting-edge developments in multiple industries.\nPosition Title:FullStack Developer\nCategory: Software Development.\nSeniority: Senior\n\nLocation:LATAM\nWhat you will be doing:\nWe’re seeking a senior-level Fullstack Engineer with a strong preference for F# expertise to join our dynamic team. This role is pivotal in developing and enhancing scalable, reliable logistics applications, encompassing both sophisticated backend services and modern frontend interfaces.\nYou will be instrumental in driving new architectural patterns and standards, focusing on clean design, operational excellence, and a reliability-first approach. The position involves hands-on development using F# for backend systems and proficiency in React for frontend development. A key aspect of this role includes contributing to the development of automated quality assurance (AQA) tests using the Playwright framework.\nYou will collaborate closely with cross-functional teams, participate in on-call rotations for production systems, and contribute to a culture that values continuous improvement and thoughtful problem-solving. While F# is preferred, candidates with a solid C#/.NET functional programming foundation and a demonstrated willingness to learn F# will be considered.\n\nKey Responsibilities\nDevelop and maintain robust backend services utilizing F#, adhering to best practices for scalable and reliable cloud-hosted applications on AWS.\n\nUse AI tools to improve your development quality and manual processes.\n\nImplement and enhance modern frontend features using React, incorporating Server-Side Rendering (SSR) practices.\n\nDesign and implement solutions leveraging event-driven architectures and event streaming concepts, with familiarity in systems like Kafka being advantageous.\n\nWrite comprehensive unit and integration tests for both frontend and backend code to ensure application quality and stability.\n\nContribute to the development and maintenance of applications using relational databases, including PostgreSQL and SQL Server, with a strong understanding of SQL, indexing, and debugging.\n\nParticipate actively in the on-call rotation for production systems, focusing on triaging and resolving incidents to minimize downtime.\n\nDrive the adoption of observability practices, including structured logging and the creation of runbooks, to enhance system operability and maintainability.\n\nDevelop and execute automated tests using the Playwright framework for API testing, contributing to the overall quality assurance process.\n\nCollaborate with cross-functional teams to define and implement architectural patterns, ensuring applications are designed for operability, scalability, and maintainability.\n\nContribute to the continuous improvement of the application portfolio, focusing on enhancing user experience and managing technical debt.\n\nRequired Skills & Experience\nProficiency in F# for backend development; C# with a strong functional programming foundation and a demonstrated willingness to learn F# will also be considered.\n\nMid-level proficiency in frontend development with React, TypeScript, and CSS.\n\nExperience with Server-Side Rendering (SSR) practices, such as htmx or similar technologies.\n\nPractical understanding of event-driven systems and distributed system concepts, including idempotency and eventual consistency.\n\nExperience developing cloud-hosted applications on AWS, Azure, or GCP.\n\nComfortable working with relational databases, including SQL, indexing, and debugging.\n\nExperience writing unit and integration tests for both frontend and backend code.\n\nFamiliarity with CI/CD practices and maintaining a strong working knowledge of the tech stack.\n\nExperience with observability practices, including structured logging and runbooks.\n\nExperience with AI tools like Claude, copilot or similar, to improve the coding process and the quality of this.\n\nNice to Have Skills\nFamiliarity with containerization technologies such as Docker and orchestration tools like Kubernetes.\n\nExperience with event streaming platforms, specifically Apache Kafka.\n\nProficiency in developing automated API tests using the Playwright framework.\n\nExperience with specific AWS services including S3, SQS, SNS, and Lambda.\n\nKnowledge of infrastructure as code tools, such as Terraform.\n\nFamiliarity with GitHub Actions for CI/CD pipelines.\n\nExperience with both PostgreSQL and SQL Server relational database engines.\n\nExposure to F# front-end DSLs for server-side rendering (SSR).\n\nSoft Skills\nClear and concise communication, essential for translating complex technical details to cross-functional teams and for articulating design choices through documentation and reviews.\n\nA strong sense of ownership and a proactive, detail-oriented approach to problem-solving, driving continuous improvement in application development and operational excellence.\n\nAdaptability and comfort working within distributed teams and fast-paced environments, embracing a culture that encourages experimentation and learning from failures.\n\nEmpathetic collaboration, valuing team growth and constructive feedback to foster a supportive and innovative development environment.\n\nA mindset that encourages challenging existing patterns and proposing innovative solutions, aligning with Lean Tech's culture of continuous advancement.\n\nWhy you will love GTS:\nJoin a powerful tech workforce and help us change the world through technology\n\nProfessional development opportunities with international customers\n\nCollaborative work environment\n\nCareer path and mentorship programs that will lead to new levels.\n\nJoin GTS and contribute to shaping the data landscape within a dynamic and growing organization. Your skills will be honed, and your contributions will play a vital role in our continued success. GTS is an equal opportunity employer. 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